Patent ID: 8323833

Claim:
A lithium secondary battery comprising a cathode, an anode, an electrolyte and a separator, wherein: (I) the cathode comprises a lithium-manganese composite oxide as a cathode active material; and (II) the anode comprises: (A) an anode active material; (B) inorganic particles consisting of TiO 2 ; and (C) styrene-butadiene rubber (SBR); wherein: (1) the TiO 2 has a particle size in the range of 1 to 500 nm and is contained in an amount in the range of 1 to 10 parts by weight based on 100 parts by weight of the anode active material; (2) the styrene-butadiene rubber (SBR) as anode binder which binds the anode active material and TiO 2 comprises a hydrophilic functional group forming a hydrogen bond with anode materials comprising (A) and (B); (3) the lithium secondary battery has manganese ions (Mn 2+ ), which are dissolved out from the cathode, reduced at a surface of TiO 2 instead of the anode active material where lithium is reversibly intercalated/deintercalated, so that the anode resistivity is reduced; and (4) the anode active material is a carbonaceous material.