PbLi2Ti6O14: A novel high-rate long-life anode material for rechargeable lithium-ion batteries

As a novel anode material, PbLi2Ti6O14 is prepared by a traditional solid state method at a calcination temperature of 900 degrees C. Structural analysis and electrochemical tests prove that PbLi2Ti6O14 possesses a good crystallinity and superior performance. PbLi2Ti6O14, composed of particles with 400 nm in length and 300 nm in width, exhibits an initial charge capacity of 155.1 mAh g(-1) at 100 mA g(-1) and maintains at 147.9 mAh g(-1) after 100 cycles, with capacity retention as high as 95.4%. Especially, the reversible capacity of PbLi2Ti6O14 can stabilize at 101.6 mAh g(-1) after 1000 cycles at a high current density of 1000 mA g(-1), with capacity retention of 87.5%. Besides, the lithium storage behavior in PbLi2Ti6O14 is also studied by various in-situ and ex-situ methods. It is found that the lithiation/delithiation process in PbLi2Ti6O14 is a highly reversible reaction. All these results demonstrate that PbLi2Ti6O14 may be an impressive anode material in the near future. (C) 2016 Elsevier B.V. All rights reserved.