Patent ID: 7776476

Claim:
A battery comprising: a cathode; an anode; and an electrolyte, wherein an anode active material comprises tin (Sn), cobalt (Co) and carbon (C), and the electrolyte contains a cyclic ester carbonate derivative having halogen atom and at least one from the group consisting of light metal salts expressed in Chemical formula 1 and Chemical formula 2: wherein R11 represents —C(═O)—R21-C(═O)-group (R21 represents an alkylene group, an alkylene halide group, an arylene group, or an arylene halide group), —C(═O)—C(R23)(R24)-group (R23 and R24 represent an alkyl group, an alkyl halide group, an aryl group, or an aryl halide group), or —C(═O)—C(═O)-group; R12 represents a halogen group, an alkyl group, an alkyl halide group, an aryl group, or an aryl halide group; X11 and X12 represent oxygen (O) or sulfur (S), respectively; M11 represents a transition metal element, or a 3B Group element, a 4B Group element, or a 5B Group element in the short period periodic table; M21 represents a 1A Group element or a 2A Group element in the short period periodic table or aluminum (Al); a represents an integer number from 1 to 4; b represents an integer number from 0 to 8; and c, d, e, and f represent an integer number from 1 to 3, respectively, wherein R31, R32, R33, and R34 represent a group obtained by substituting at least part of hydrogen of an alkyl group with halogen.