The polymeric electrolyte made of fluorine containing copolymer comprises, at least one kind selected from the group consisting of a PEGMA-2,2,2-TFEA copolymer, a PEGMA-TFEA-AN copolymer, a PEGMA- TFEA-MMA copolymer, a PEGMA-TFEA-VP copolymer, a PEGMA-TFEA- TMVS copolymer, and a PEGMA-TFEA-EEA copolymer. 前記高分子電解質はフッ素系コポリマーとして、PEGMA−2,2,2−TFEAコポリマー、TAMP、PEGMA−TFEA−MMAコポリマー、PEGMA−TFEA−VPコポリマー、PEGMA−TFEA−TMVSコポリマー、PEGMA−TFEA−EEAコポリマーよりなる群から選択された一つ以上を含む。 - 特許庁