This application claims priority to and the benefit of Korean Patent Application No. 10-2016-0086402, filed on Jul. 7, 2016, in the Korean Intellectual Property Office, and all the benefits accruing therefrom under 35 U.S.C. § 119, the content of which is incorporated herein in its entirety by reference.
1. Field
The present disclosure relates to a battery structure, and a method of manufacturing the same.
2. Description of the Related Art
As technology in the electronics field has developed, the market for various portable and wearable electronic devices such as cellular phones, game devices, portable multimedia players (PMP), MPEG audio layer-3 (MP3) players, smartphones, smart pads, e-readers, tablet computers, and mobile medical devices, has grown. Accordingly, with an increase in the demand for portable electronic devices, demand for batteries appropriate for powering portable electronic devices has also increased.
Secondary batteries refer to batteries capable of charging and discharging, whereas primary batteries are not rechargeable. As a secondary battery, a lithium battery has a higher voltage and a higher energy density per unit weight than a nickel-cadmium battery or a nickel-hydrogen battery. There remains a need for improved electrodes for batteries.
Although secondary batteries including three-dimensional electrodes provide a large capacity, the secondary battery may not operate due to cracks or the like which are generated during charging and discharging of the battery. Thus, the majority of the capacity of the secondary battery may decrease.
Therefore, there is a demand for secondary batteries having a large capacity that does not decrease even in the case of deterioration of the secondary batteries.
Provided is a battery structure that includes a plurality of battery modules that are electrically connected to and ionically blocked from one another.
Provided is a method of manufacturing the battery structure.
According to an aspect of an embodiment, a battery structure includes: a positive electrode current collector layer; a plurality of battery modules disposed on the positive electrode current collector layer and spaced apart from one another; and a negative electrode current collector layer disposed on the plurality of battery modules and disposed opposite to the positive electrode current collector layer, wherein each battery module of the plurality of battery module includes: a plurality of first positive active material layers which are in electrical contact with the positive electrode current collector layer and disposed in a direction protruding from the positive electrode current collector layer; a plurality of first negative active material layers which are in electrical contact with the negative electrode current collector layer and disposed in a direction protruding from the negative electrode current collector layer; and an electrolyte layer disposed between the plurality of first positive active material layers and the plurality of first negative active material layers.
According to an aspect of another embodiment, a method of manufacturing the battery structure includes: preparing a positive active material layer module; disposing a plurality of positive active material layer modules on a positive electrode current collector layer so as to be spaced apart from one another; disposing an electrolyte layer on the plurality of positive active material layer modules; disposing a negative active material layer on the electrolyte layer; and disposing a negative electrode current collector layer on the negative active material layer, wherein the positive active material layer module includes a plurality of positive active material layers disposed perpendicular to a surface of the positive electrode current collector layer.
According to an aspect of yet another embodiment, a method of manufacturing the battery structure includes: providing a positive active material layer module; disposing the positive active material layer module on a conductive substrate; disposing an electrolyte layer on the positive active material layer module; disposing a negative active material layer on the electrolyte layer to prepare a battery module; disposing a plurality of battery modules on a positive electrode current collector layer to be spaced apart from one another; and disposing a negative electrode current collector layer on the plurality of battery modules, wherein the positive active material layer module comprises a plurality of positive active material layers disposed perpendicular to a surface of the positive electrode current collector layer.
Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments.
These and/or other aspects will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which:
Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. In this regard, the present embodiments may have different forms and should not be construed as being limited to the descriptions set forth herein. Accordingly, the embodiments are merely described below, by referring to the figures, to explain aspects.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms, including “at least one,” unless the content clearly indicates otherwise. “Or” means “and/or.” As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. Expressions such as “at least one of,” when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list. It will be further understood that the terms “comprises” and/or “comprising,” or “includes” and/or “including” when used in this specification, specify the presence of stated features, regions, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and/or groups thereof.
In the present specification, the term “battery” indicates a primary battery or a secondary battery. The battery may be an electrochemical battery, for example, a lithium secondary battery or a sodium secondary battery.
Like reference numerals in the drawings denotes like components, and sizes of components in the drawings may be exaggerated for clarity and convenience of explanation. In addition, embodiments described herein are illustrative purposes only, and various changes in form and details may be made therein. It will be understood that when a component is referred to as being “on the top of” or “on” another component, the component can be directly on the other component or indirectly thereon. In contrast, when an element is referred to as being “directly on” another element, there are no intervening elements present.
It will be understood that, although the terms “first,” “second,” “third” etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, “a first element,” “component,” “region,” “layer” or “section” discussed below could be termed a second element, component, region, layer or section without departing from the teachings herein.
Furthermore, relative terms, such as “lower” or “bottom” and “upper” or “top,” may be used herein to describe one element's relationship to another element as illustrated in the Figures. It will be understood that relative terms are intended to encompass different orientations of the device in addition to the orientation depicted in the Figures. For example, if the device in one of the figures is turned over, elements described as being on the “lower” side of other elements would then be oriented on “upper” sides of the other elements. The exemplary term “lower,” can therefore, encompasses both an orientation of “lower” and “upper,” depending on the particular orientation of the figure. Similarly, if the device in one of the figures is turned over, elements described as “below” or “beneath” other elements would then be oriented “above” the other elements. The exemplary terms “below” or “beneath” can, therefore, encompass both an orientation of above and below.
“About” or “approximately” as used herein is inclusive of the stated value and means within an acceptable range of deviation for the particular value as determined by one of ordinary skill in the art, considering the measurement in question and the error associated with measurement of the particular quantity (i.e., the limitations of the measurement system). For example, “about” can mean within one or more standard deviations, or within ±30%, 20%, 10%, 5% of the stated value.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Exemplary embodiments are described herein with reference to cross section illustrations that are schematic illustrations of idealized embodiments. As such, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, embodiments described herein should not be construed as limited to the particular shapes of regions as illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, a region illustrated or described as flat may, typically, have rough and/or nonlinear features. Moreover, sharp angles that are illustrated may be rounded. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the precise shape of a region and are not intended to limit the scope of the present claims.
Hereinafter, with reference to the attached drawings, embodiments of a battery structure and a method of preparing the battery structure will be described in further details.
Referring to
In the battery structure 200, the plurality of battery modules 100 that are spaced apart from one another may be in electrical contact (e.g., electrically connected) with one another by at least one selected from the positive electrode current collector layer 101 and the negative electrode current collector layer 111. The positive electrode current collector layer 101 and the negative electrode current collector layer 111 may include, for example, at least one electrically conductive metal, such as copper (Cu), gold (Au), platinum (Pt), silver (Ag), zinc (Zn), aluminum (Al), magnesium (Mg), titanium (Ti), iron (Fe), cobalt (Co), nickel (Ni), germanium (Ge), indium (In), and palladium (Pd). However, embodiments are not limited thereto, and any suitable current collector may be used. The positive electrode current collector layer 101 may be, for example, an aluminum foil. The negative electrode current collector layer 111 may be, for example, a copper foil.
The plurality of battery modules 100 in the battery structure 200 may be spaced apart from one another, and thus the plurality of battery modules 100 may be ionically blocked from one another. The battery structure 200 may include an ion non-conductive gas or ion non-conductive solid between the plurality of battery modules 100. That is, in the battery structure 200, an ion non-conductive layer 150 may be disposed between each battery module of the plurality of battery modules 100, and thus the plurality of battery modules 100 are ionically blocked from one another. In addition, the ion non-conductive layer 150 may include an ion non-conductive gas or an ion non-conductive solid. Examples of the ion non-conductive gas may include air, nitrogen, argon, and helium, but embodiments are not limited thereto. Any suitable gas that prevents ion transfer available may be used. Examples of the ion non-conductive layer solid may be a polymer, but embodiments are not limited thereto. Any suitable solid that prevents ion transfer may be used. The ion non-conductive solid may serve as a supportive material for improving structural stability of the battery structure 200. For example, the ion non-conductive layer 150 may include at least one polymer having significantly low ionic conductivity in order to prevent ion transfer, such as an epoxy resin, polytetrafluoroethylene (PTFE), and polyethylene terephthalate (PET). The ionic conductivity of the ion non-conductive layer 150 may be 1×10−7 siemens per centimeter (S/cm) or less. For example, the ionic conductivity of the ion non-conductive layer 150 may be 1×10−7 S/cm or less at a temperature of about 25° C. For example, the ionic conductivity of the ion non-conductive layer 150 may be 1×10−10 S/cm or less at a temperature of about 25° C. For example, the ionic conductivity of the ion non-conductive layer 150 may be 1×10−15 S/cm or less at a temperature of about 25° C. For example, the ionic conductivity of the ion non-conductive layer 150 may be 1×10−20 S/cm or less at a temperature of about 25° C.
In the battery structure 200, the ion non-conductive layer 150 disposed between each of the battery modules of the plurality of battery modules 100 may be connected to one another to form an ion non-conductive channel.
Although the plurality of battery modules 100 in the battery structure 200 may be electrically connected to one another, the plurality of battery modules 100 may be ionically blocked from one another. Thus, even when some of the plurality of battery modules 100 do not operate due to deterioration, the failed battery modules 100 do not affect charging and discharging of the other battery modules 100. Therefore, a decrease of capacity of the battery structure 200 may be reduced, thus efficiently maintaining capacity thereof.
The battery module 100 may be deteriorated due to various reasons. When the battery module 100 is deteriorated, the electrical conductivity of the failed battery module 100 may be 10−8 S/cm or less. For example, the electrical conductivity of the failed battery module 100 may be 10−10 S/cm or less. For example, a decrease of electrical conductivity of the battery module 100 may result from formation of a leak between the electrolyte layer 120 and a negative active material layer 112, followed by enlargement of a void, which is an area that may not be in contact with the electrolyte layer 120 and the negative active material layer 112 and which occurs at an interface between the electrolyte layer 120 and the negative active material layer 112 toward the inside of the negative active material layer 112.
Referring to
The number of battery modules 100 included in the battery structure 200 is not particularly limited, and may be chosen depending on the environment or the size of a device that includes the battery structure 200. For example, the number of battery modules 100 included in the battery structure 200 may be 2 or greater, 5 or greater, 10 or greater, 50 or greater, 100 or greater, 500 or greater, 1000 or greater, or 5000 or greater. The shape of the battery structure 200 is not particularly limited, and may be chosen depending on the size or the shape of the space in which the battery structure 200 is accommodated. For example, the battery structure 200 may be rectangular, square, circular, elliptical, pentagonal, hexagonal, or heptagonal. In addition, in the battery structure 200, the plurality of battery modules 100 may be spaced apart from one another, but remain electrically connected to one another via a flexible and conductive metal. Thus, even if the battery structure 200 is curved or bent, the formation of cracks in each battery module 100 may be prevented, and the battery structure 200 may be in curved-surface form, not in flat-surface form.
Referring to
In the battery structure 200, a distance between a side surface and an opposite side surface of the battery module 100 may be in a range of about 1 mm to about 5 cm. For example, a length L in
Referring to
Referring to
The partition 103 may have a composition which is different from the composition of the first positive active material layer 102a. When the partition 103 has a composition different from that of the first positive active material layer 102a, the partition 103 may support the first positive active material layer 102a more firmly. For example, the partition 103 may have a composition which may be inactive against electrochemical reactions. Since the partition 103 is inactive against electrochemical reactions, when charging and discharging the battery structure 200, changes in volume of one first positive active material layer 102a may not affect the other first positive active material layers 102a, thus improving stability of the plurality of first positive active material layers 102a.
The partition 103 may have a composition which is the same as that of the first positive active material layer 102a. When the partition 103 has a composition the same as that of the first positive active material layer 102a, compared to a battery structure without a partition, the volume of the positive active material may increase, thus additionally increasing energy density of the battery structure 200.
Referring to
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The first positive active material layer 102a and the first negative active material layer 112a may be in planar form and may be perpendicular to the current collector layer 101 and the negative electrode current collector layer 111. When the first positive active material layer 102a and the first negative active material layer 112a are in planar form, the migrating distance for ions present within the first positive active material layer 102a and/or the first negative active material layer 112a to reach the electrolyte layer 120 may decrease, thus reducing internal resistance and improving high-rate characteristics.
The thicknesses of the first positive active material layer 102a and the first negative active material layer 112a may each be, independently, about 100 μm or less. For example, the thicknesses of the first positive active material layer 102a and the first negative active material layer 112a may each be 50 μm or less. For example, the thicknesses of the first positive active material layer 102a and the first negative active material layer 112a may each be 40 μm or less. For example, the thicknesses of the first positive active material layer 102a and the first negative active material layer 112a may each be 30 μm or less. For example, the thicknesses of the first positive active material layer 102a and the first negative active material layer 112a may each be 20 μm or less. For example, the thicknesses of the first positive active material layer 102a and the first negative active material layer 112a may each be 10 μm or less. For example, the thicknesses of the first positive active material layer 102a and the first negative active material layer 112a may each be about 5 μm or less. For example, the thicknesses of the first positive active material layer 102a and the first negative active material layer 112a may each be from about 0.01 μm to about 100 μm. As the thicknesses of the first positive active material layer 102a and the first negative active material layer 112a decrease, the migrating distance for ions present within the first positive active material layer 102a and/or the first negative active material layer 112a to reach the electrolyte layer 120 may decrease, thus reducing internal resistance and improving high-rate characteristics.
The thickness of the electrolyte layer 120 may be 20 μm or less. For example, the thickness of the electrolyte layer 120 may be 15 μm or less. For example, the thickness of the electrolyte layer 120 may be 10 μm or less. For example, the thickness of the electrolyte layer 120 may be 5 μm or less. For example, the thickness of the electrolyte layer 120 may be 4 μm or less. For example, the thickness of the electrolyte layer 120 may be 2 μm or less. For example, the thickness of the electrolyte layer 120 may be 1 μm or less. For example, the thickness of the electrolyte layer 120 may be 0.5 μm or less. For example, the thickness of the electrolyte layer 120 may be 0.1 μm or less. For example, the thickness of the electrolyte layer 120 may be from about 0.01 μm to about 20 μm. As the thickness of the electrolyte layer 120 decreases, the migrating distance for ions from the first positive active material layer 102a to reach the first negative active material layer 112a may decrease, thus reducing internal resistance and improving high-rate characteristics.
The thicknesses of the positive electrode current collector layer 101 and the negative electrode current collector layer 111 may each be about 30 μm or less. For example, the thicknesses of the positive electrode current collector layer 101 and the negative electrode current collector layer 111 may each be about 20 μm or less. For example, the thicknesses of the positive electrode current collector layer 101 and the negative electrode current collector layer 111 may each be about 10 μm or less. For example, the thicknesses of the positive electrode current collector layer 101 and the negative electrode current collector layer 111 may each be about 5 μm or less. For example, the thicknesses of the positive electrode current collector layer 101 and the negative electrode current collector layer 111 may each be about 3 μm or less. For example, the thicknesses of the positive electrode current collector layer 101 and the negative electrode current collector layer 111 may each be from about 0.01 μm to about 30 μm. As the thicknesses of the positive electrode current collector layer 101 and the negative electrode current collector layer 111 decrease, the weight fraction of the current collectors in the battery module 100 decrease. Thus, energy density per unit weight of the battery module 100 may increase.
Referring to
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Referring to
The positive conductor layer 105 and the positive electrode current collector layer 101 may be prepared using different materials, and then adhered to each other. Also, the positive conductor layer 105 and the positive electrode current collector layer 101 may be prepared as a single unit using the same electrically conductive material. The negative electrode conductive layer 115 and the negative electrode current collector layer 111 may be prepared using different materials, and then adhered to each other. Also, the positive conductor layer 105 and the positive electrode current collector layer 101 may be prepared as one body using the same electrically conductive material. For example, the positive electrode current collector layer 101 may have a plurality of positive conductor layers 105 extending in a substantially perpendicular or perpendicular direction from a surface thereof. The negative electrode current collector layer 111 may have a plurality of negative electrode conductive layers 115 extending in a substantially perpendicular or perpendicular direction from a surface thereof. In
Since the positive conductor layer 105 in planar form is inserted into the first positive active material layer 102a, both sides of the positive conductor layer 105 may be in contact with the first positive active material layer 102a. Since the negative electrode conductive layer 115 in planar form is inserted into the first negative active material layer 112a, both sides of the negative electrode conductive layer 115 may be in contact with the first negative active material layer 112a. The positive conductor layer 105 and the negative electrode conductive layer 115 may extend from the positive electrode current collector layer 101 and the negative electrode current collector layer 111, respectively, to be in contact with the electrolyte layer 120. The positive conductor layer 105 and the negative electrode conductive layer 115 each extend to the electrolyte layer 120, thereby facilitating migration of electrons to end portions of the first positive active material layer 102a and the first negative active material layer 112a. In some embodiments, the positive conductor layer 105 and the negative electrode conductive layer 115 may extend from the positive electrode current collector layer 101 and the negative electrode current collector layer 111, respectively, toward the electrolyte layer 120, but may not make contact with the electrolyte layer 120. In
The thicknesses of the positive electrode conductive layer 105 and the negative conductor layer 115 may each be about 3 μm μm or less. For example, the thicknesses of the positive electrode conductive layer 105 and the negative conductor layer 115 may each be about 2 μm or less. For example, the thicknesses of the positive conductor layer 105 and the negative conductor layer 115 may each be about 1 μm or less. For example, the thicknesses of the positive conductor layer 105 and the negative conductor layer 115 may each be about 0.5 μm or less. For example, the thicknesses of the positive conductor layer 105 and the negative conductor layer 115 may each be about 0.3 μm or less. For example, the thicknesses of the positive conductor layer 105 and the negative conductor layer 115 may each be from about 0.1 μm to about 3 μm. As the thicknesses of the positive conductor layer 105 and the negative conductor layer 115 decrease, the weight fraction of the current collectors comprising the conductor layers in the battery module 100 decreases. Thus, energy density per unit weight of the battery module 100 may increase.
Deterioration of the battery module 100 may result from a rapid decrease in the resistance, as well as an increase in the resistance. That is, excess current may flow in a module, consequently leading to consumption of energy. When one battery module 100 in the battery structure 200 has failed, which may cause an increase of current loss due to a rapid decrease of resistance, each battery module 100 may include a separate device or material that may insulate the failed battery module 100 from other battery modules 100. In the battery structure 200, when each of the battery modules 100 includes the separate device or material, current loss due to a rapid decrease in resistance of the battery module 100 may be prevented. Types of the device are not particularly limited, and the device may be any suitable material and/or device capable of electrically blocking the battery module 100 from the surrounding environment when the resistance of the battery module 100 exceeds a certain level. The material and/or device may be disposed in the battery module 100, attached to the battery module 100, and/or disposed around the battery module 100.
In the battery structure 200 according to the above-described embodiments, the battery module 100 may include the plurality of parallel first positive active material layers 102a and the plurality of parallel first negative active material layers 112a on the positive electrode current collector layer 101 and the negative electrode current collector layer 111 that are parallel to each other, respectively. The plurality of parallel first positive active material layers 102a and the plurality of parallel first negative active material layers 112a may alternately be disposed on surfaces of the positive electrode current collector layer 101 and the negative electrode current collector layer 111, consequently leading to improvements in the energy density and high-rate characteristics of the battery module 100. In some embodiments, referring to
The battery structure 200 including the foregoing battery module 100 may be a lithium battery.
In lithium batteries, the positive active material included in the positive active material layer 102 is not particularly limited, and any suitable lithium battery positive active material may be used.
A positive active material may be a compound capable of reversible intercalation and deintercalation of lithium (i.e., a lithiated intercalation compound). The positive active material may include at least one selected from lithium cobalt oxide, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminum oxide, lithium iron phosphorous oxide, and lithium manganese oxide. The positive active material is not limited to these examples, and any suitable positive active material may be used
For example, the positive active material may be at least one selected from a lithium cobalt oxide such as LiCoO2; a lithium nickel oxide such as LiNiO2; a lithium manganese oxide such as Li1+xMn2−xO4 (wherein x is from 0 to 0.33); a lithium manganese oxide such as LiMnO3, LiMn2O3, or LiMnO2; a lithium copper oxide such as Li2CuO2; a lithium iron oxide such as LiFe3O4; a lithium vanadium oxide such as LiV3O8; a copper vanadium oxide such as Cu2V2O7; a vanadium oxide such as V2O5; a lithium nickel oxide such as LiNi1−xMxO2 (wherein M is at least one selected from Co, Mn, Al, Cu, Fe, Mg, B, and Ga, and x is from 0.01 to 0.3); a lithium manganese composite oxide such as LiMn2−xMxO2 (wherein M is at least one selected from Co, Ni, Fe, Cr, Zn, and Ta, and x is from 0.01 to 0.1) or Li2Mn3MO8 (wherein M is at least one selected from Fe, Co, Ni, Cu, and Zn); a lithium manganese oxide (LiMn2O4) with partial substitution of lithium by alkali earth metal ions; a disulfide compound; and an iron molybdenum oxide represented by Fe2 (MoO4)3. For example, the positive active material may be at least one selected from LiCoO2, LiNiO2, LiMn2O4, and LiFePO4.
In lithium batteries, the negative active material included in the negative active material layer 112 is not particularly limited, and any suitable lithium battery negative active material may be used.
The negative active material may be at least one selected from an alkali metal (e.g., lithium, sodium, or potassium), an alkaline earth-metal (e.g., calcium, magnesium, or barium), a certain transition metal (e.g., zinc), and an alloy thereof. In particular, the negative active material may be at least one selected from lithium and a lithium alloy.
Lithium metal may be used as a negative active material. When lithium metal is used as a negative active material, a current collector may be omitted. Therefore, the volume and weight occupied by the current collectors may decrease, and thus, energy density per unit weight of the battery structure 200 may be improved.
An alloy of lithium metal and another negative active material may be used as a negative active material. The other negative active material may be a metal alloyable with lithium. Examples of the metal alloyable with lithium may include at least one selected from Si, Sn, Al, Ge, Pb, Bi, Sb, a Si—Y alloy (where Y is at least one selected from an alkali metal, an alkaline earth-metal, a Group 13 element, a Group 14 element, a transition metal, and a rare-earth element, and Y is not Si), and a Sn—Y alloy (where Y is at least one selected from an alkali metal, an alkaline earth-metal, a Group 13 element, a Group 14 element, a transition metal, and a rare-earth element, and Y is not Sn). Y may be at least one selected from Mg, Ca, Sr, Ba, Ra, Sc, Y, Ti, Zr, Hf, Rf, V, Nb, Ta, Db, Cr, Mo, W, Sg, Tc, Re, Bh, Fe, Pb, Ru, Os, Hs, Rh, Ir, Pd, Pt, Cu, Ag, Au, Zn, Cd, B, Al, Ga, Sn, In, Ge, P, As, Sb, Bi, S, Se, Te, and Po. For example, the lithium alloy may be at least one selected from a lithium aluminum alloy, a lithium silicon alloy, a lithium tin alloy, a lithium silver alloy, and a lithium lead alloy.
In lithium batteries, the solid electrolyte included in the electrolyte layer 102 is not particularly limited, and any suitable solid electrolyte may be used.
The solid electrolyte may be at least one selected from BaTiO3, Pb(Zr,Ti)O3 (“PZT”), Pb1−xLaxZr1−yTiyO3 (“PLZT”) (wherein 0≤x<1 and 0≤y<1), PB(Mg3Nb2/3)O3—PbTiO3 (“PMN-PT”), HfO2, SrTiO3, SnO2, CeO2, Na2O, MgO, NiO, CaO, BaO, ZnO, ZrO2, Y2O3, Al2O3, TiO2, SiO2, SiC, lithium phosphate (Li3PO4), lithium titanium phosphate (LixTiy(PO4)3, wherein 0<x<2, and 0<y<3), lithium aluminum titanium phosphate (LixAlyTiz(PO4)3, wherein 0<x<2, 0<y<1, and 0<z<3), Li1+x+y(Al, Ga)x(Ti, Ge)2−xSiyP3−yO12 (wherein 0≤x≤1 and 0≤y≤1), lithium lanthanum titanate (LixLayTiO3, wherein 0<x<2 and 0<y<3), lithium germanium thiophosphate (LixGeyPzSw, wherein 0<x<4, 0<y<1, 0<z<1, and 0<w<5), lithium nitrate (LixNy, wherein 0<x<4 and 0<y<2), lithium phosphate oxynitrate (LiPON, LixPONy, wherein 0<x<4 and 0<y<2), SiS2 type glass (LixSiySz, wherein 0<x<3, 0<y<2, and 0<z<4), P2S5 type glass (LixPySz, wherein 0<x<3, 0<y<3, and 0<z<7), Li2O, LiF, LiOH, Li2CO3, LiAlO2, Li2O—Al2O3—SiO2—P2O5—TiO2—GeO2-based ceramic, garnet-based ceramic, and Li3+xLa3M2O12 (wherein M=Te, Nb, or Zr) f, but embodiments are not limited thereto. Any suitable solid electrolyte may be used. In some embodiments, the solid electrolyte may be LiPON.
According to one or more embodiments, a method of manufacturing the battery structure 200 may include preparing a positive active material layer module 106; disposing the plurality of positive active material layer modules 106 on a positive electrode current collector layer 101 so as to be spaced apart from one another; disposing an electrolyte layer 120 on the plurality of positive active material layer modules 106; disposing a negative active material layer 112 on the electrolyte layer 120; and disposing a negative electrode current collector layer 111 on the negative active material layer 112, wherein the positive active material layer module 106 may include a plurality of positive active material layers 102 disposed perpendicular to a surface of the positive electrode current collector layer 101.
The method of manufacturing the battery structure 200 will be described with reference to
In order to prevent ions from migrating, an electrolyte layer may not be disposed between the separated positive active material layer modules 106. Referring to
In some embodiments, although not illustrated in the drawings, a method of manufacturing the battery structure 200 according to one or more embodiments includes preparing the positive active material layer module 106; disposing the positive active material layer module 106 on a conductive substrate; disposing the electrolyte layer 120 on the positive active material layer module 106; disposing the negative active material layer 112 on the electrolyte layer 120 to prepare the battery module 100; disposing a plurality of the battery modules 100 on the positive electrode current collector layer 101 so as to be spaced apart from one another; and disposing the negative electrode current collector layer 111 on the plurality of battery modules 100, wherein the positive active material layer module 106 may include the plurality of positive active material layers 102 disposed perpendicular to a surface of the positive electrode current collector layer 101. In other words, each of the battery modules 100 may be separately manufactured, the manufactured battery modules 100 may be disposed on the positive electrode current collector 101 so that the battery modules are spaced apart from each other, and then the negative electrode current collector layer 111 may be disposed on the manufactured battery modules 100.
In this case, each of the conductive substrates disposed on a surface of the plurality of positive active material layer modules 106 may be attached to one positive electrode current collector layer 101 using a conductive adhesive and/or a conductive paste.
Referring to
The method of preparing the positive active material layer module 106 will be described with reference to
Next, referring to
As described above, according to one or more embodiments, since a battery structure includes a plurality of battery modules that are electrically connected to and ionically blocked from one another, deterioration of a battery module may have less influence on the whole battery structure.
It should be understood that embodiments described herein should be considered in a descriptive sense only and not for purposes of limitation. Descriptions of features or aspects within each embodiment should be considered as available for other similar features or aspects in other embodiments.
While one or more embodiments have been described with reference to the figures, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope as defined by the following claims.
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Number | Date | Country | |
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20180013119 A1 | Jan 2018 | US |