Patent ID: 6777136
Filing Date: 2004-08-17
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
A lithium polymer battery including: a positive electrode comprising a lithium-containing complex oxide; a negative electrode comprising a material capable of absorbing and desorbing a lithium ion; and a separator comprising a liquid organic electrolyte and a host polymer retaining said organic electrolyte;wherein said host polymer is a crosslinked copolymer, which has a main-chain comprising a vinylidene fluoride unit, and a side-chain comprising an alkylene oxide unit and at least one of either an acrylate unit or methacrylate unit, wherein said side-chain is composed of polyethylene glycol diacrylate or polyethylene glycol dimethacrylate, said diacrylate or dimethacrylate having an average molecular weight of 300 to 1,600; and, wherein the content of said side-chain in said copolymer is 1 to 30 wt %.