NOVELTY - A secondary battery (10) consists of an electrolyte material (1) containing a metal cation and an anion, an anion filter (2) which permeates metal cation more preferably than the anion, and a negative electrode (3) in which the metal cation is reversibly discharged and/or occluded and a positive electrode (4) in which the metal cation is reversible discharged and/or occluded, which are electrochemically connected by the electrolyte material. The anion filter is arranged to separate the negative electrode and the positive electrode in the electrolyte material.    USE - Secondary battery is used in electrical device.    ADVANTAGE - Since the electrolyte-electrode interfacial resistance in the positive electrode is reduced and the ionic conductivity between the positive electrode and negative electrode is improved, the secondary battery has excellent cycle characteristics.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) anion filter, which comprises a material having silicon-oxygen bond, formed by reacting a metal atom-containing compound (A1) of formula (I) and a compound (A2) in presence of an additive (A3) of formula: R24-N+(-R25)(-R26)(-R27-Y2) (IV) or R28-N+(=R29)-R30(-Y2)(V), where the compound (A2) is obtained by reacting a silane compound of formula (II) with nitrogen-containing salt and/or phosphorus-containing salt of formula: R12-L-X (III); and    (2) electrolyte body-electrode assembly, in which the anion filter and electrolyte material of gel form or solid state are arranged.    M=Si, Ti, Al, V, Zr, Sn or Cr;    R1=1-100C bivalent hydrocarbyl, alkyleneoxy, oxyalkylene, or O;    R2-R7=H, hydroxy, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, phenyl, acetonato group, acetylacetonato group, acetate group, methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy, sec-butoxy, tert-butoxy, -O-M-, or acryloyloxy group, methacryloyloxy group, vinyl group or allyl group having 1-3C alkylene or 2-3C alkenylene;    n2-n5=0 or 1, in which n2+n3+2 and n4+n5+2 are valence of each M;    m1=1 or more;    R=H or 1-10C hydrocarbyl;    R8=1-100C bivalent hydrocarbyl, alkyleneoxy, oxyalkylene, or O;    R9-R11=H, hydroxy, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, phenyl, acetonato group, acetylacetonato group, acetate group, methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy, sec-butoxy, tert-butoxy, -O-Si-, or acryloyloxy group, methacryloyloxy group, vinyl group or allyl group having 1-3C alkylene or 2-3C alkenylene;    n9,n10=0 or 1, in which n9+n10+2 is valence of Si;    m2=1 or more;    X=group of formula (i), (ii), (iii) or (iv);    R12=vinyl group, allyl group, acryloyl imino group, acryloyloxy group or methacryloyloxy group;    L=single bond, 1-3C alkylene or 2-3C alkenylene;    Y1=nitrogen atom or phosphorus atom;    R13,R14=1-10C alkyl or 4-7C cycloalkyl having 1-10C alkyl, in which one or more carbon atoms in alkyl and cycloalkyl are optionally substituted by heteroatom and one or more hydrogen atoms bonded with carbon atom and heteroatom are optionally substituted by 1-6C hydrocarbyl;    or R13+R14=ring;    R15=H or 1-10C alkyl, in which one or more carbon atoms are optionally substituted by heteroatom and hydrogen atom bonded with carbon atom and heteroatom is optionally substituted by one or more 1-6C hydrocarbyl groups;    (Z1)-,(Z2)-=1-10C alkyl sulfonic-acid ion, fluoroalkyl sulfonic-acid ion, alkoxy sulfonic-acid ion, fluoroalkoxy alkyl sulfonic-acid ion, bis(alkylsulfonyl)imide ion, bis(fluoroalkyl sulfonyl)imide ion, fluoroalkyl sulfonyl (fluorosulfonyl)imide ion, fluoroalkyl carboxylate ion, fluoroalkyl (trifluoro)borate ion, fluoroalkoxy (trifluoro)borate ion, fluoroalkoxy alkyl(trifluoro)borate ion, acetate ion, hexafluorophosphate ion, hexafluoroarsenate ion, chloride ion, bromide ion, iodide ion, bis(fluorosulfonyl)imide ion, perchlorate ion, tetrafluoroboric acid ion, or tetracyano borate ion;    R16=1-10C alkyl or 2-10C alkenyl;    R17=1-10C alkylidene or 2-10C alkenylidene;    or R16+R17=ring;    R18,R19=1-10C alkyl or 4-7C cycloalkyl having 1-10C alkyl;    R20,R21,R23=1-10C alkylene or 2-10C alkenylene;    or R18+R19=ring;    or R19+R20=ring;    R22=1-10C alkylidene or 2-10C alkenylidene;    or R21+R22=ring;    or R22+R23=ring;    Y2=sulfo or carboxy;    R24-R26,R28=1-20C alkyl or 4-14C cycloalkyl having 1-20C alkyl;    R27=1-20C alkylene or 2-20C alkenylene;    or R25+R26=ring;    or R26+R27=ring;    R29=1-20C alkylidene group or 2-20C alkenylidene group;    R30=1-20C alkylene or 2-20C alkenylene;    or R28+R29=ring;and    or R29+R30=ring.    (i) in R18-R23 groups, one or more carbon atoms are optionally substituted by heteroatom and one or more hydrogen atoms bonded with carbon atom and heteroatom are optionally substituted by 1-6C hydrocarbyl; (ii) in R29 and R30 group, one or more carbon atoms are optionally substituted by heteroatom and one or more hydrogen atoms bonded with carbon atom and heteroatom are optionally substituted by 1-12C hydrocarbyl group; and (iii) in R24-R28 groups, one or more carbon atoms are optionally substituted by heteroatom, and one or more hydrogen atoms bonded with carbon atom and heteroatom are optionally substituted by 1-12C hydrocarbyl or acryloyloxy group, methacryloyloxy group, vinyl group or allyl group.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of secondary battery.    Electrolyte material (1)    Anion filter (2)    Negative electrode (3)    Positive electrode (4)    Secondary battery (10)