Preparation of crosslinked solid polymer electrolyte

摘要

A crosslinked solid polymer electrolyte is prepared by adding a reactive polyalkylene oxide and an inorganic lithium salt to a block-graft copolymer comprising first and second block chains, and subjecting the reactive polyalkylene oxide to crosslinking reaction. The crosslinked solid polymer electrolyte has a high ionic conductivity and can be readily formed into a tough film and is thus suited for use in large-size secondary batteries.