Patent ID: 8101296

Claim:
A battery comprising a cathode, an anode, an electrolytic solution, and a separator, wherein an open circuit voltage per pair of said cathode and said anode in a full charging state lies within a range from 4.25V or more to 6.00V or less, said electrolytic solution contains: an additive selected from the group consisting of an acid anhydride and its derivative; and a cyclic carbonic ester derivative having a halogen atom, said cathode includes a cathode material in which a surface of a lithium cobaltate particle is covered with a microparticle of a lithium composite oxide selected from the group consisting of: Li x Co 2 , Li x NiO 2 , Li x Mn 2 O 4 , Li x Co 1-y M y O 2 , Li x Ni 1-y M y O 2 , Li x Mn 1-y M y O 2 and LiM5PO 4 , wherein 0<x≦1.2, 0<y<1, 0.9≦z≦1.1, M denotes an element of at least one kind selected from the group consisting of titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), aluminum (Al), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), molybdenum (Mo), bismuth (Bi), and boron (B), and M5 represents at least one kind selected from a group consisting of cobalt (Co), manganese (Mn), iron (Fe), nickel (Ni), magnesium (Mg), aluminum (Al), boron (B), titanium (Ti), vanadium (V), niobium (Nb), copper (Cu), zinc (Zn), molybdenum (Mo), calcium (Ca), strontium (Sr), tungsten (W), and zirconium (Zr), and said electrolytic solution contains 5 wt % of the cyclic carbonic ester derivative having a halogen atom, 20 wt % of ethylene carbonate, 5 wt % of propylene carbonate, 65 wt % of dimethyl carbonate and 5 wt % of ethylmethyl carbonate.