Claims
- 1. An electrochemical cell comprised of a cathode, a liquid electrolyte comprising one or more lithium salts dissolved in sulfur oxyhalides, and a lithium anode coated with a solid polymer electrolyte comprised of a lithium salt complex of a polymer which contains an electron donating heteroatom such as oxygen through which the polymer complexes with the lithium salt, wherein said polymer is a polyphosphazene of the formula ##STR2## where LiX is a lithium salt, m is the number of repeating polyphosphasphazene monomer in the polymer electrolyte.
- 2. The electrochemical cell of claim 1 wherein said lithium salt complex with the polyphosphazene polymer is comprised of one or more salts selected from the group LiAlCl.sub.4, LiAsF.sub.6, LiBF.sub.4, LiBr, LiCF.sub.3 SO.sub.3, LiClO.sub.4, LiGaCl.sub.4, LiI, LiNO.sub.3, LiN(CF.sub.3 SO.sub.2).sub.2, and LiPF.sub.6.
- 3. The electrochemical cell of claim 1 where n=0.25.
- 4. The electrochemical cell of claim 2 wherein said liquid electrolyte is comprised of LiAlCl.sub.4 in thionyl chloride.
- 5. An electrochemical cell comprised of a cathode, a liquid electrolyte comprising one or more lithium salts dissolved in sulfur oxyhalides, and a lithium anode coated with a solid polymer electrolyte comprised of a lithium salt complex of a polymer which contains an electron donating heteroatom such as oxygen through which the polymer complexes with the lithium salt, wherein said polymer is a polymer mixture of a polyphosphazene and poly(ethylene oxide), PEO.
- 6. The electrochemical cell of claim 5 wherein said Li salt complex with the polymer mixture is comprised of one or more salts selected from the group LiAlCl.sub.4, LiAsF.sub.6, LiBF.sub.4, LiBr, LiCF.sub.3 SO.sub.3, LiClO.sub.4, LiGaCl.sub.4, LiI, LiNO.sub.3, LiN(CF.sub.3 SO.sub.2).sub.2 and LiPF.sub.6.
- 7. The electrochemical cell of claim 6 in which said polyphosphazene is poly[bis-methoxyethoxyethoxy)phosphazene], MEEP.
- 8. The electrochemical cell of claim 6 wherein said liquid electrolyte is comprised of LiAlCl.sub.4 in thionyl chloride.
- 9. The electrochemical cell of claim 7 in which the ratio of MEEP to PEO is about 70 weight-percent to 30 weight-percent and the molecular ratio of the Li salt to MEEP monomer unit is about 1 to 6.
Parent Case Info
This application is a continuation-in-part of application Ser. No. 604,834 filed Oct. 24, 1990, now abandoned.
Government Interests
This invention was made with Government support under Contract No. N60921-88-C-0102 awarded by the United States Naval Surface Warfare Center. The Government has certain rights in this invention.
US Referenced Citations (7)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
604834 |
Oct 1990 |
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