NOVELTY - A cyclic siloxane compound is new.    USE - (1) is used for an electrolyte consisting nonaqueous liquid electrolytes, gel polymer electrolytes, or solid polymer electrolytes useful for an electrochemical cell. The gel polymer electrolyte is used for manufacturing the gel polymer electrolyte film. The solid polymer electrolyte is used for solid polymer electrolyte film (claimed). (I) is useful for high capacity lithium-ion batteries and cells e.g. primary and secondary cell e.g. small lithium polymer secondary cell used in portable information terminals, e.g. cell phones, notebook computers, and all kinds of electronic equipment, e.g. camcorders, and large capacity lithium polymer secondary cell used in power storage systems for power equalization and electric vehicles. The electrolyte is for use in alkali metal batteries.    ADVANTAGE - When (1) is added to the electrolyte, ionic conductivity and cation transference number of electrolytes are enhanced, increasing the electrochemical stability of alkali metal batteries at room temperature. The cells manufactured using electrolytes of (1) exhibited higher capacity.    DETAILED DESCRIPTION - A cyclic siloxane compound of formula (1), is new.    R1, R2=H, or electron withdrawing functional group consisting -SO2CF3, -CN, -F, -CL, -COCF3, or -SO2CN, but do not both simultaneously represent H;    R3=H or cyano group;    R4=H, or compounds of formulae (a) or (b);    R5, R6=H or Me group;    R7=alkyl, alkenyl, alkyl halide, alkenyl halide, alkanol, halo, H, or hydroxyl group;    Y, Z=O, S, CO, OCO, OCOO, or COO;    n=1-1000;    o, p, q=0-1000, respectively;and    r, s=0-20, respectively, whose sum is greater than or equal to1.    INDEPENDENT CLAIMS are also included for:    (1) an electrolyte comprising (1);    (2) a nonaqueous liquid electrolyte comprising an anion receptor of (1); a nonaqueous solvent; and an alkali metal ion containing substance;    (3) a gel polymer electrolyte comprising an anion receptor of (1); a polymer support; a nonaqueous solvent; and an alkali metal ion containing substance;    (4) a solid polymer electrolyte comprising an anion receptor of (1); a polymer compound consisting net-shaped polymers, comb-shaped polymers, or branched polymers, or a crosslinkable polymer; and an alkali metal ion containing substance;    (5) an electrochemical cell comprising a cathode, an anode, and the electrolyte;    (6) a gel polymer electrolyte film manufactured using the gel polymer electrolyte; and    (7) a solid polymer electrolyte film manufactured using the solid polymer electrolyte.    DESCRIPTION OF DRAWING(S) - The figure is a graph showing a relation between ionic conductivities and temperature changes in solid polymer electrolytes and of comparative examples.