Claims
- 1. A secondary battery comprising:
- a positive electrode having a material containing reversibly intercalated alkaline earth metal ions, said material being selected from the group consisting of BaNiO.sub.3, BaNiO.sub.2, BaCoO.sub.5, BaCoO.sub.2.8, BaFeO.sub.3, SrNiO.sub.3, SrCoO.sub.2.5, SrCoO.sub.2.8, SrCoO.sub.3, SrFeO.sub.4, SrFe.sub.2.5, SrFeO.sub.3, CaCo.sub.2 O.sub.4, Ca.sub.3 Co.sub.4 O.sub.9, Ca.sub.3 Co.sub.2 O.sub.5, Ca.sub.3 Co.sub.2 O.sub.6, CaFeO .sub.3, CaFeO.sub.2, MgNiO.sub.2, MgCo.sub.2 O.sub.4 and MgFe.sub.2 O.sub.4 ;
- a negative electrode having a carbon composition which intercalates alkaline earth metal ions reversibly; and
- an electrolyte having an organic solvent and a solute, said solute including an alkaline earth metal salt.
- 2. A secondary battery according to claim 1, wherein said solute is selected from the group consisting of Ba(BF.sub.4).sub.2, Ba(CF.sub.3 SO.sub.3).sub.2, Ba(PF.sub.6).sub.2, Ba(ClO.sub.4).sub.2, Ba(AsF.sub.6).sub.2, Ba(SbF.sub.6).sub.2, Sr(BF.sub.4).sub.2, Sr(CF.sub.3 SO.sub.3).sub.2, Sr(PF.sub.6).sub.2, Sr(ClO.sub.4).sub.2, Sr(AsF.sub.6).sub.2, Sr(SbF.sub.6).sub.2, Ca(BF.sub.4).sub.2, Ca(CF.sub.3 SO.sub.3).sub.2, Ca(PF.sub.6).sub.2, Ca(ClO.sub.4).sub.2, Ca(AsF.sub.6).sub.2, Ca(SbF.sub.6).sub.2, Mg(BF.sub.4).sub.2, Mg(CF.sub.3 SO.sub.3).sub.2, Mg(PF.sub.6).sub.2, Mg(ClO.sub.4).sub.2, Mg(AsF.sub.6).sub.2 and Mg(SbF.sub.6).sub.2.
- 3. A secondary battery according to claim 1, wherein said organic solvent is selected from a group consisting of ethylene carbonate (EC), dimethyl carbonate (DMC) and vinylene carbonate (VC).
- 4. A secondary battery according to claim 1, wherein said carbon composition is selected from the group consisting of coke, refined coke with 99% or more purity, organic compound produced from calcined cellulose, graphite and glassy carbon.
- 5. A secondary battery having an average discharge voltage of about 4.0 comprising:
- a positive electrode having a material containing reversibly intercalated alkaline earth metal ions, said material being selected from the group consisting of BaFeO.sub.3, SrFeO.sub.3, CaFeO.sub.3 and CaFeO.sub.2 ;
- a negative electrode having a carbon composition which intercalates alkaline earth metal ions reversibly; and
- an electrolyte having an organic solvent and a solute said solute being composed of ClO.sub.4.sup.2- ions and cations.
- 6. A secondary battery according to claim 5, wherein said carbon composition is selected from the group consisting of coke, refined coke with 99% or more purity, organic compound produced from calcined cellulose, graphite and glassy carbon.
- 7. A secondary battery according to claim 6, wherein said graphite has an average granule size ranging from 1 .mu.m to 30 .mu.m, a "d" value (d.sub.002) of a crystal face (002) evaluated by X-ray diffraction ranging from 3.35 to 3.40 and a size of crystallite for a C-axis direction tested by X-ray diffraction being larger than 150.ANG..
- 8. A secondary battery according to claim 6, wherein said organic solvent is selected from the group consisting of ethylene carbonate (EC), dimethyl carbonate (DMC) and vinylene carbonate (VC).
- 9. A secondary battery according to claim 6, wherein said organic solvent is composed of a mixture of ethylene carbonate (EC) and dimethyl carbonate (DMC).
Priority Claims (1)
Number |
Date |
Country |
Kind |
4-335660 |
Nov 1992 |
JPX |
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Parent Case Info
This application is a continuation in part of U.S. Ser. No. 134,079 filed Oct. 8, 1993 now abandoned.
US Referenced Citations (11)
Foreign Referenced Citations (2)
Number |
Date |
Country |
1258410 |
Oct 1989 |
JPX |
2262241 |
Oct 1990 |
JPX |
Non-Patent Literature Citations (2)
Entry |
P. G. Dickens and G. J. Reynolds "Transport and Equilibrium Properties of Some Insertion Compounds", Solid State Ionics 5 (1981) 331-334 (no month). |
Sax and Lewis, editors "Hawley's Condensed Chemical Dictionary 11th Edition", Van Nostrand Reinhold, p. 454 (no month available). |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
134079 |
Oct 1993 |
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