NOVELTY - A multicharged-ion conductivity material comprises quaternary ammonium salts (I and II), multicharged-ion salt (III) and metal complex salts (IV and V).    USE - Multicharged-ion conductivity material for producing a multicharged-ion battery (claimed) i.e. lithium ion secondary battery that is utilized in digital portable apparatus such as a notebook personal computer, mobile telephone and digital camera, and hybrid vehicle and electric vehicle.    ADVANTAGE - The material improves ionic conductivity, energy density, charging and discharging efficiency, and safety of the battery.    DETAILED DESCRIPTION - A multicharged-ion conductivity material comprises quaternary ammonium salts of formulae (R1R2R3X1N+)Z1- (I) and (R8R9X1N+)Z1- (II), multicharged-ion salt of formula (M2+((Y1SO2)2N-)2) (III) and metal complex salt of formulae (R4R5R6R7N+)2M2+(Q)2 (IV) and (R10R11R12N+)2(Q)2 (V).    R1-R3=1-10C alkyl or 4-7C cycloalkyl;    R1+R2=ring;    R8,R9=1-10C alkyl or alkenyl;    R8+R9=ring;    X1=coupling group containing methylene or methane, vinyl, allyl, acrylamide, acrylate or methacrylat;    Z1-=alkyl sulfonic acid ion, fluoroalkyl sulfonic-acid ion, bis(alkylsulfonyl) imide ion, bis(fluoroalkyl sulfonyl)imide ion, acetate ion, fluoroalkyl carboxylate ion, perchlorate ion, tetrafluoroboric acid ion, hexafluorophosphate ion, hexafluoro arsenate ion, chloride ion, bromide ion or iodide ion;    M=calcium or magnesium;    Y1=fluorine or fluoroalkyl;    R4-R7=1-10C alkyl or 4-7C cycloalkyl;    R4+R5=ring;    R10-R12=1-10C alkyl or alkenyl;    R10+R11=ring;    Q=(L-(Y2)C=C(Y2)L-), sulfur substituted benzene moiety of formula (a), 1,3-dithiol-2-thione, 4,5-dithiolate anion or 1,3-dithiol-2-thione 4,5-diselenide;    Y2=fluoroalkyl or CN;    L=O, S or Se;and    T1-T4=H or 1-6C linear or branched alkyl.    INDEPENDENT CLAIMS are also included for the following:    (1) a multicharged-ion conductivity electrolyte-electrode assembly comprising a multicharged-ion conductivity material arranged on an electrode, a multicharged-ion conductivity electrolyte formed by temporary hardening of the material, which is carried out by drying, heating or UV irradiation, a counter electrode positioned on the multicharged-ion conductivity electrolyte that is joined to the electrode and the counter electrode    (2) a multicharged-ion battery comprising multicharged-ion conductivity electrolyte-electrode assembly.