Patent ID: 8293403

Claim:
A composition which can be polymerized and/or crosslinked by polyaddition for a battery electrolyte comprising: a) at least one polyorganosiloxane (POS) (A) which is an essentially linear random or block copolymer with the following mean general formula (II): which can optionally comprise units of formula RSiO 3/2 (T), in which formula: the R symbols, which are identical or different, each represent a monovalent hydrocarbon group chosen from a linear or branched alkyl radical having from 1 to 6 carbon atoms, a cycloalkyl radical having from 5 to 8 carbon atoms, an alkoxyl radical and a phenyl radical; the Y symbols, which are identical or different, each represent an R 1 -Poa group where the R 1 symbol represents a radical comprising from 2 to 50 carbon atoms and the Poa symbol represents a group of polyoxyalkylene ether type; the X symbols, which are identical or different, each represent a C 2 -C 6 alkenyl functional group bonded to silicon; the A symbols, which are identical or different each represent an R symbol, an X symbol or a Y symbol, the said symbols having the same definitions as above; m is an integer or fractional number greater than or equal to 0; n is an integer or fractional number greater than or equal to 1; and o is an integer or fractional number between 5 and 50; b) at least one polyorganosiloxane (POS) (B) exhibiting, per molecule, at least two hydrogen atoms bonded to silicon; c) a catalytically effective amount of at least one hydrosilylation catalyst (C); and d) at least one electrolyte salt (D).