Gel electrolytes for electrochromic and electrochemical devices
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United States of America Patent
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May 15, 2001
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N/A
app pub date -
Nov 2, 1998
filing date -
Nov 2, 1998
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Expired
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Abstract
Gel electrolytes for electrochromic and electrochemical devices wherein in one embodiment polymeric gelling agents/atactic or syndiotactic, and isotactic PMMA, and a lithium salt in a suitable solvent are dissolved at a temperature above the gelation point and cooled to form a gel electrolyte. In another embodiment a preelectrolyte film is formed by casting a solution of a mixture of stereocomplexed PMMA with a plasticizer (a complexing low molecular weight polar solvent) in a non-complexing volatile solvent (e.i., CClH.sub.3), followed by the activation of the film in a liquid electrolyte which includes a lithium salt and low molecular weight complexing solvents to form the completed gel electrolyte.
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