Patent ID: 8563172

Claim:
An anode composition for a lithium secondary battery, said battery further comprising an electrolyte, said anode composition comprising an anode active material, a binder, and a conductive material: (A) wherein the anode active material comprises a plurality of anode active material particles, each of which comprises: (1) a core of metal or metalloid, or a compound comprising the metal or metalloid, allowing alloying or dealloying with lithium; and (2) a shell formed at a surface of the core, said shell consisting of Ketjen black; and (B) wherein the conductive material comprises carbon nano fiber dispersed in the anode composition; and (C) wherein the metal or metalloid allowing alloying or dealloying with lithium, used for the core of the anode active material particle, is any one selected from the group consisting of Si, Sn, Al, Sb, Bi, As, Ge, Pb, their mixtures, and their alloys.