| abstract |
(57) [Problem] To provide a lithium battery having good electrolyte retention and excellent stability, particularly a lithium secondary battery having excellent cycle life. Lithium having a polymer electrolyte containing, as a matrix, a copolymer containing polymerized units based on fluoroolefin and polymerized units based on vinylene carbonate, and a solution comprising a solute of a lithium salt and a solvent capable of dissolving the lithium salt. battery. |