Facile Synthesis of Carbon-Coated Spinel Li 4 Ti 5 O 12 /Rutile-TiO 2 Composites as an Improved Anode Material in Full Lithium-Ion Batteries with LiFePO 4 @N-Doped Carbon Cathode.

The spinel Li4 Ti5 O12 /rutile-TiO2 @carbon (LTO-RTO@C) composites were fabricated via a hydrothermal method combined with calcination treatment employing glucose as carbon source. The carbon coating layer and the in situ formed rutile-TiO2 can effectively enhance the electric conductivity and provide quick Li+ diffusion pathways for Li4 Ti5 O12 . When used as an anode material for lithium-ion batteries, the rate capability and cycling stability of LTO-RTO@C composites were improved in comparison with those of pure Li4 Ti5 O12 or Li4 Ti5 O12 /rutile-TiO2 . Moreover, the potential of approximately 1.8 V rechargeable full lithium-ion batteries has been achieved by utilizing an LTO-RTO@C anode and a LiFePO4 @N-doped carbon cathode.