FLUORINATED GRAFT COPOLYMER, POLYMERIC ELECTROLYTE CONTAINING THIS COPOLYMER, LITHIUM ACCUMULATOR BATTERY WITH THE POLYMERIC ELECTROLYTE Russian patent published in 2003 - IPC

FIELD: chemical industry; production of fluorinated graft copolymer; polymeric electrolyte containing it and lithium accumulator batteries. SUBSTANCE: invention presents fluorinated graft copolymer, the polymeric electrolyte containing this copolymer, and lithium accumulator battery with the polymeric electrolyte. The graft copolymer of monomethylic ether of polyethylene glycol and copolymer trifluoroethylenechloride and vinylidene fluoride is described by formula I: , where n is within the range from 1 up to 10, m is within the range from 1 up to 5, a is within the range from 3 up to 25, l is within the range from 50 up to 337. The invention also presents a method of production of grafting of monomethylic ether of polyethylene glycol and copolymer trifluoroethylenechloride and vinylidene fluoride of formula I and the polymeric electrolyte containing indicated graft copolymer of formula I as well as the lithium accumulator batteries. EFFECT: invention allows to produce fluorinated graft copolymer with better conductivity, good mechanical strength and an excellent adhesion to electrodes, without adding a solution of an organic electrolyte, and also to produce the lithium accumulator battery with better charging / discharging performances. 14 cl, 1 tbl, 5 dwg