Compositions – Electrolytes for electrical devices
Patent
1995-03-15
1997-07-15
Diamond, Alan D.
Compositions
Electrolytes for electrical devices
429190, 429189, 429191, 429192, 429209, 427 80, 427 79, 4271261, 427553, 427558, 427496, 4273881, 4273897, 4273935, 427508, H01M 616, H01M 618
Patent
active
056480113
ABSTRACT:
The structurally stable gelled electrolyte of the present invention includes a base electrolyte, a three-dimensional polymer precursor that is radiation curable and an electrically non-conducting solvent gelling agent. The base electrolytes of this invention are comprised of an aprotic liquid and a dissolved ionizable alkaline metal salt. The preferred radiation curable polymer pre-cursors of this invention include trimethylol propane ethoxy triacrylate (TMPEOTA) and poly(ethylene glycol) diacrylate (PEGDA). The solvent gelling agent should be a solid powder or polymer with high surface area to adsorb the liquid electrolyte. Solid powders that can be used in the gelling agent include inorganic oxygen compounds such as silica (SiO.sub.2), titania (TiO.sub.2), alumina (Al.sub.2 O.sub.3), magnesium oxide (MgO), barium oxide (B.sub.2 O.sub.3) and the like. Other compounds that can be used in the gelling agent include super absorbent polymers, clays, zeolite and such. The structurally stable gelled electrolyte of this invention is coated onto a suitable substrate, for example a glass plate, metal foil, a battery electrode web and cured, either in place, or can be used as a free standing film for cell assembly.
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Diamond Alan D.
Micron Communications Inc.
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