Patent ID: 7229717

Claim:
A battery comprising: a cathode; an anode; and an electrolyte, wherein: (a) the anode comprises an anode active material which comprises: (i) tin (Sn); (ii) a second element selected from the group consisting of boron (B), carbon (C), aluminum (Al), and phosphorus (P); and (iii) a third element selected from the group consisting of silicon (Si), magnesium (Mg), titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), gallium (Ga), zirconium (Zr), niobium (Nb), molybdenum (Mo), silver (Ag), indium (In), cerium (Ce), hafnium (Hf), tantalum (Ta), tungsten (W), and bismuth (Bi), wherein, the content of the second element in the anode active material is from 9.8 wt % to 49 wt %; and (b) the electrolyte comprises a solvent which comprises a cyclic ester carbonate derivative selected from the group consisting of the compounds of chemical formula 1 and the compounds of chemical formula 2, wherein X1 through X10, represent any of a hydrogen group, a flourine group, a chlorine group, a bromine group and an iodine group, and X1 through X10, may be identical or different from each other but at least one thereof is a flourine group, chlorine group, bromine group or an iodine group.