Abstract: C+Ag/Li₄Ti₅O₁₂ micron size particles were synthesized as negative electrode materials with Li₂CO₃，anatase TiO₂，glucose，AgNO₃ as raw materials with a high temperature solid state reaction in an Ar atmosphere. The phase structure，morphologies and electrochemical properties of the materials were systematically characterized with XRD，SEM，electrochemical workstation，charge-discharge battery tester. The results demonstrated that C and Ag doped Li₄Ti₅O₁₂ as the negative electrode materials of lithium-ion batteries had excellent electrochemical performances，C+Ag/Li₄Ti₅O₁₂ exhibited a higher specific capacity，better cycling performance and better rate capability than those of pristine Li₄Ti₅O₁₂. The initial discharge capacity reached 165. 8 mAh/g at 0.1C，and the discharge capacity still remained 80 mAh/ g at 5 C.

Key words: lithium titanate, electrical conductivity, doping, coating, rate capability