(JP2896361-B2)      A macromolecular electrolytic medium contains an electrolyte consisting of: (a) a macromolecular matrix consisting of a copolymer of a polymeric monomer of formula (1) and a crosslinking agent of formula (2); (b) a polymerisation initiator; (c) an inorganic salt; and (d) a solvent. The macromolecular electrolytic medium contains a vinylidene fluoride-based resin and/or N,N-diethyl acrylamide.    CH2=C(R1)-CO-N(R2)-R3 (1)    CH2=C(R4)-CO-(-OCH2CH2-)n-OOC-C(R5)=CH2 (2)    R1 = a hydrogen atom, or methyl gp.; R2 and R3 = hydrogen atoms, methyl, ethyl, propyl, dialkylamino propyl[-C3H6N(R')2 ;    R' = a 1-6C alkyl gp.] and hydroxyethyl (CH2CH2OH) gps.;    R4 and R5 = hydrogen atoms, or methyl gps.;    n = 3-300.    Also claimed is that the prodn. comprises: (a)mixing the polymeric monomer of formula (1) with an electrolyte consisting of the crosslinking agent of formula (2), the polymerisation initiator, the inorganic salt, and the solvent; (b) adding the vinylidene fluoride-based resin and/or the N,N'-diethyl acrylamide to form an electrolytic compsn.; (c) polymerizing the electrolytic compsn.    Also claimed is that a lithium sec. battery uses the macromolecular solid electrolyte.    ADVANTAGE -   The organic electrolyte having high ion conductivity is contained in the macromolecular matrix. The result leaks no electrolyte and yields flexibility. The resulting macromolecular solid electrolyte is easily formed into a desired shape. The lithium sec. battery evolves less deterioration caused by pressurisation and thermal change in producing the lithium sec. battery. The resulting lithium sec. battery has superior electro-chemical characteristics.    (US5965300-A)      A macromolecular electrolytic medium contains an electrolyte consisting of: (a) a macromolecular matrix consisting of a copolymer of a polymeric monomer of formula (1) and a crosslinking agent of formula (2); (b) a polymerisation initiator; (c) an inorganic salt; and (d) a solvent. The macromolecular electrolytic medium contains a vinylidene fluoride-based resin and/or N,N-diethyl acrylamide.    CH2=C(R1)-CO-N(R2)-R3 (1)    CH2=C(R4)-CO-(-OCH2CH2-)n-OOC-C(R5)=CH2 (2)    R1 = a hydrogen atom, or methyl gp.; R2 and R3 = hydrogen atoms, methyl, ethyl, propyl, dialkylamino propyl[-C3H6N(R')2 ;    R' = a 1-6C alkyl gp.] and hydroxyethyl (CH2CH2OH) gps.;    R4 and R5 = hydrogen atoms, or methyl gps.;    n = 3-300.    Also claimed is that the prodn. comprises: (a)mixing the polymeric monomer of formula (1) with an electrolyte consisting of the crosslinking agent of formula (2), the polymerisation initiator, the inorganic salt, and the solvent; (b) adding the vinylidene fluoride-based resin and/or the N,N'-diethyl acrylamide to form an electrolytic compsn.; (c) polymerizing the electrolytic compsn.    Also claimed is that a lithium sec. battery uses the macromolecular solid electrolyte.    ADVANTAGE -   The organic electrolyte having high ion conductivity is contained in the macromolecular matrix. The result leaks no electrolyte and yields flexibility. The resulting macromolecular solid electrolyte is easily formed into a desired shape. The lithium sec. battery evolves less deterioration caused by pressurisation and thermal change in producing the lithium sec. battery. The resulting lithium sec. battery has superior electro-chemical characteristics.