Cross-linkable composition for a battery electrolyte

A composition for use in the manufacture of a battery electrolyte, comprising:

• (a) at least one polyorganosiloxane (POS) (A) comprising siloxyl units of formula (I)
• R1xR2yR3zSiO(4−x−y−z)/2 (I)
• in which formula the various symbols have the following meanings:
• x, y and z are integers with 1≦x+y+z≦3;
• the R1, R2 and R3 radicals are identical to or different from one another and represent an optionally substituted, linear or branched, C1-C12 alkyl radical, an optionally substituted C5-C10 cycloalkyl radical, an optionally substituted C6-C18 aryl radical, an optionally substituted aralkyl radical or an —OR4 radical where R4 represents a hydrogen or a linear or branched alkyl radical having from 1 to 15 carbon atoms, and
• wherein the POS (A) comprises, per molecule:
• at least 2 siloxyl units of formula (I), one of the radicals of which comprises a functional group of epoxy type (Epx) and optionally a functional group of ether type (Eth);
• and
• at least one of the siloxyl units of formula (I) comprises at least one radical carrying a polyoxyalkylene (Poa) ether functional group;
• (b) at least one electrolyte salt;
• and
• (c) an effective amount of at least one cationic and/or radical photoinitiator, wherein said composition is polymerizable and/or crosslinkable by the cationic and/or radical route under irradiation and/or by (an) electron beam(s),