Gel-form solid electrolyte-forming vinylidene fluoride...

C - Chemistry – Metallurgy – 08 – F

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C08F 214/22 (2006.01) C08L 27/16 (2006.01) H01B 1/12 (2006.01) H01M 4/62 (2006.01) H01M 6/18 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2297325

A solid polymer electrolyte having improved ionic conductivity and adhesion with an electroconductive substrate and also remarkably enhanced heat resistance is formed with a vinylidene fluoride copolymer which contains 50 - 97 mol. % of vinylidene fluoride monomer and 0.1 - 5 mol. % of an unsaturated dibasic acid monoester or an epoxy group- containing vinyl monomer and further has been crosslinked, thereby improving the performances of a non-aqueous battery, such as a lithium ion battery.

Electrolyte polymère solide ayant une conductivité ionique et une adhérence à la base collectrice améliorées, ainsi qu'une résistance à la chaleur nettement améliorée. On forme ledit électrolyte à partir d'un copolymère de fluorure de vinylidène réticulé comprenant 50 à 97 % molaires d'unités monomères de fluorure de vinylidène et 0,1 à 5 % molaires d'unités dérivées soit d'un monoester d'un acide dibasique insaturé, soit d'un monomère d'époxyvinyle. Cet électrolyte est utile pour améliorer les propriétés des piles à base non aqueuse, telles que les piles au lithium.

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