NOVELTY - Manufacturing fluoropolymer hybrid organic/inorganic composite comprises: providing mixture of (a) fluoropolymer comprising units of fluorinated monomer and comonomer (MA) with hydroxy group (polymer (F1)), (b) metal compound (M1) (I), (c) liquid medium with compound that is diester (IIde) and ester-amide (IIea) and (d) optionally electrolytic salt (ES); reacting hydroxy groups of (MA) of (F1) with hydrolyzable groups (Y1) of (M1) to get grafted fluoropolymer (polymer (Fg)) comprising pendant group (II); and hydrolyzing and/or polycondensing (M1) and/or (II) to get liquid mixture of composite.    USE - The method is useful for manufacturing a fluoropolymer hybrid organic/inorganic composite that is used in: film, where the film is used as polymer electrolyte separator in metal-ion secondary battery and dye-sensitized solar cell (all claimed); and electrochemical and photo-electrochemical devices.    ADVANTAGE - The method provides fluoropolymer hybrid organic/inorganic composite that exhibits improved viscosity and enhanced ionic conductivity while obviating to environmental and safety concerns.    DETAILED DESCRIPTION - Manufacturing a fluoropolymer hybrid organic/inorganic composite comprises: providing a mixture comprising (a) at least one fluoropolymer comprising recurring units derived from at least one fluorinated monomer and at least one comonomer (comonomer (MA)) comprising at least one hydroxy group (polymer (F1)), (b) at least one metal compound (M1) of formula (I), (c) a liquid medium comprising at least one compound that is diester of formula (IIde) and an ester-amide of formula (IIea) and (d) optionally, at least one electrolytic salt (ES); reacting at least a fraction of hydroxy groups of (MA) of (F1) with at least a fraction of the hydrolyzable groups Y1 of (M1) to obtain a grafted fluoropolymer (polymer (Fg)) comprising at least one pendant group of formula (II); and hydrolyzing and/or polycondensing (M1) and/or (II) to yield a liquid mixture comprising the composite and incorporating the liquid medium.    m = 1-4 or 1-3;    A1 = Si, Ti or Zr;    Y1 = hydrolyzable group;    X1 = hydrocarbyl optionally comprising at least one functional group;    R1, R2 = 1-20C hydrocarbyl; either    R3, R4 = H, 1-36C hydrocarbyl optionally substituted; or    NR3R4 = part of a cyclic moiety optionally substituted and/or comprising at least one additional heteroatom; and    Z1, Z2 = linear or branched 3-10C divalent alkylene.    INDEPENDENT CLAIMS are also included for:    (1) the fluoropolymer hybrid organic/inorganic composite obtained by reaction between the polymer (F1), at least one (M1), the liquid medium, (d) optionally, at least one (ES), where at least one (II) is grafted to polymer (F1) through reaction of at least a fraction of the hydroxy groups of (MA) with at least a fraction of the hydrolyzable groups (Y1) of (M1); and    (2) a fluoropolymer film comprising the fluoropolymer hybrid organic/inorganic composite and the liquid medium.