Perovskite-Type CaVO<sub>3</sub> Nanocomposite as High-Performance Anode Material for Lithium-Ion Batteries
Lei Sun, Zifeng Lin, Yucheng Hu, Lin Tan, Xiaolei Li, Xiaojiao Yang, Ying Liu
Abstract
Electric vehicles’ rapid development has put higher requirements on the performance of lithium-ion batteries (LIBs). However, the specific capacity of a commercial graphite anode (372 mAh g –1 ) has become the bottleneck for further improvement. Therefore, it is urgent to develop novel anode materials with superior performance. Herein, we propose crystalline–amorphous dual-phase CaVO 3 nanocomposites as LIB anodes. Benefiting from the stable perovskite structure and high conductivity of CaVO 3, the nanocomposite follows the intercalation mechanism, resulting in no capacity decay during 5000 cycles. In addition, due to the multielectron transfer provided by amorphous high-valent vanadium oxide, the nanocomposite can provide a high specific capacity of 442.8 mAh g –1 with a suitable average working potential of 0.95 V. The ingenious strategy of constructing nanocomposites through spontaneous oxidation of nanoparticles is expected to be extended to the perovskite oxide family, inspiring the development of more high-performance LIB anodes.