Synthesis and Characterization of Ramsdellite Type Lithium Titanate Anode Materials by Spray Pyrolysis

摘要

Spherical Li_2Ti_3O_7 precursor powders were successfully prepared by spray pyrolysis. X-ray diffraction analysis revealed that the ramsdellite phase was obtained by calcining at 1100 °C for 3 h under an argon/hydrogen (95/5 %) atmosphere. The Li_2Ti_3O_7 anode exhibited higher rechargeable capacity and excellent cycle stability. The rechargeable capacity of the Li_2Ti_3O_7 anode was approximately 168 mAh/g at 0.1 C. The discharge capacity of the Li_2Ti_3O_7 anode after 100 cycles was approximately 90% of the initial discharge capacity.