Preparation and Effects of Mo-doping on the Electrochemical Properties of Spinel Li_4Ti_5O_(12) as Anode Material for Lithium Ion Battery

Mo-doped Li4Ti5O12 in the form of Li4Ti4.95Mo0.05O12 was synthesized via solid state reaction.X-ray diffraction(XRD) and scanning electron microscope(SEM) were employed to characterize the structure and morphol-ogy of Li4Ti4.95Mo0.05O12.Mo-doping does not change the phase composition and particle morphology,while improves remarkably its cycling stability at high charge/discharge rate.Li4Ti4.95Mo0.05O12 exhibits an excellent rate capability with a reversible capacity of 117.03 mAh/g at 10C and even 94.24 mAh/g at 30C.The substitution of Mo for Ti site can enhance the electronic conductivity of Li4Ti5O12 via the generation of mixing Ti4+/Ti3+,which indicates that Li4Ti4.95Mo0.05O12 is a promising as a high rate anode for the lithium-ion batteries.