Rechargeable lithium intercalation battery with hybrid polymeric electrolyte
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United States of America Patent
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Mar 22, 1994
Grant Date -
N/A
app pub date -
Mar 5, 1993
filing date -
Mar 5, 1993
priority date (Note) -
Expired
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Abstract
A rechargeable battery comprises lithium intercalation compound electrodes and an interposed electrolyte of flexible polymer containing a lithium salt dissolved in a polymer-compatible solvent. Preferred components include tertiary lithium manganese oxide compound positive electrodes, carbon negative electrodes, and poly(vinylidene fluoride) copolymer electrolyte layers containing about 20 to 70% of a solution of lithium salt in a medium boiling solvent comprising such solvents as ethylene carbonate, propylene carbonate, and dimethyl carbonate. The electrolyte layers may be employed in the form of individual separator films or as a coated component of multilayer battery structures to provide electrical ionic conductivity up to about 10.sup.-3 S/cm.
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