Polymer Solid Electrolyte
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United States of America Patent
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Dec 19, 2000
Grant Date -
N/A
app pub date -
Mar 11, 1999
filing date -
Aug 20, 1996
priority date (Note) -
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Abstract
A polymer solid electrolyte obtained by blending (1) a polyether copolymer having a main chain derived form ethylene oxide and an oligooxyethylene side chain, (2) an electrolyte salt compound, and (3) a plasticizer of an aprotic organic solvent or a derivative or metal salt of a polyalkylene glycol having a number-average molecular weight of 200 to 5,000 or a metal salt of the derivative is superior in ionic conductivity and also superior in processability, moldability and mechanical strength to a conventional solid electrolyte. A secondary battery is constructed by using the polymer solid electrolyte in combination with a lithium metal negative electrode and a lithium cobaltate positive electrode.
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