NOVELTY - A nonaqueous electrolyte comprises electrolytic salt dissolved in nonaqueous solvent, and sulfate group-containing compound (I)-(IV) as additive.    USE - Nonaqueous electrolyte is used for electrical storage device (claimed) e.g. lithium cell. Uses include but are limited to mobile telephone, notebook computer, electric vehicle, motor vehicle, hybrid electric vehicle, plug-in hybrid electric vehicle and battery electric vehicle.    ADVANTAGE - The nonaqueous electrolyte provides electrical storage device with excellent gas-evolution inhibitory effect, low-temperature discharge characteristics and electrochemical characteristic even at high temperature and high voltage.    DETAILED DESCRIPTION - A nonaqueous electrolyte comprises electrolytic salt dissolved in nonaqueous solvent, and sulfate group-containing compound of formula (I)-(IV) as additive.    L1=1-12C alkyl, 2-12C alkoxyalkyl, 6-12C aryl, 3-18C linear or cyclic ester group, 1-6C organic group having sulfur, 4-10C organic group having silicon, 2-7C organic group having cyano, 2-12C organic group having phosphorus, -P(=O)F2, 2-7C alkyl carbonyl or 7-13C arylcarbonyl (all optionally substituted by halo), or 2-7C alkenyl, 3-8C alkynyl, in which alkyl, alkoxyalkyl, alkenyl, alkynyl or alkylcarbonyl are linear or branched;    L2=p-valent hydrocarbyl coupling group optionally having ether bond, thioether bond or -S(=O)2-coupling;    p=2-4;    R31-R33=1-12C alkyl, 2-3C alkenyl or 6-8C aryl;    q=1-4;    L3=1-12C alkyl, 2-6C alkenyl, 3-6C alkynyl, 2-12C alkoxyalkyl, -CR34R35C(=O)OR36 or 6-12C aryl when q is 1, or hydrocarbyl coupling group of q-valent which may include an ether bond, thioether bond or -S(=O)2-coupling when q is 2-4, in which hydrogen of alkyl or aryl is optionally by halo;    R34,R35=H, halo or 1-4C alkyl;    R36=1-8C alkyl, 2-6C alkenyl or 3-6C alkynyl, in which hydrogen of alkyl or aryl is optionally by halo;    L4=1-12C alkyl, 2-6C alkenyl, 3-6C alkynyl, 2-12C alkoxyalkyl, -CR41R42C(=O)OR43 or 6-12C aryl;    X=alkali metal of III-IV period in periodic table, SiR44R45, quaternary onium, or alkaline-earth metal of III-IV period in periodic table;    r=1 or 2;    R41,R42=H, halo or 1-4C alkyl;    R43=1-8C alkyl, 2-6C alkenyl or 3-6C alkynyl;and    R44,R45=1-12C alkyl, 2-3C alkenyl or 6-8C aryl.    (i) At least 1 hydrogen atom in L2 is optionally substituted by halo; (ii) When X is alkali metal of III-IV period in periodic table or quaternary onium, r is 1; (iii) When X is alkaline-earth metal of III-IV period in periodic table or SiR44R45, r is 2; and (iv) The hydrogen of alkyl group and aryl group in compound (IV) is optionally substituted by halo. An INDEPENDENT CLAIM is included for electrical storage device, which has non-aqueous electrolyte containing electrolytic salt and nonaqueous solvent, positive electrode, and negative electrode.