A NOVEL CROSS-LINKER FOR THE PREPARATION OF A NEW FAMILY OF SINGLE ION CONDUCTION POLYMERS FOR ELECTROCHEMICAL DEVICES AND SUCH POLYMERS

摘要

A specific cross-linker, an alkaline metal bis(styrene sulfonyl)imide monomer, is used in the synthesis of single ionic conductive copolymers which are non-fluorinated and non-PEO based. Such copolymers meet the security and costs requirements to be used as solid polymers electrolytes (SPE). They are promising alternatives to standard liquid electrolytes in alkaline metal-ion batteries because of their improved security and inflammability properties. The copolymers described are either polyvinyl sulfonates or acrylate-vinyl sulfonate block-copolymers. Preferred acrylate monomers are methacrylates and preferred vinyl sulfonates are styrene sulfonates. The copolymer is prepared by radical polymerization of the vinyl sulfonate and the cross-linker and optionally the acrylate, in particular radical photopolymerization using a functionalized bis(acyl)phosphane oxide (BAPO) as photoinitiator. Also described is the use of such copolymer as solid polymer electrolyte in a lithium ion battery.