Perovskite-Type\nCaVO<sub>3</sub> Nanocomposite as\nHigh-Performance Anode Material for Lithium-Ion Batteries

Electric vehicles’ rapid development has put higher\nrequirements\non the performance of lithium-ion batteries (LIBs). However, the specific\ncapacity of a commercial graphite anode (372 mAh g<sup>–1</sup>) has become the bottleneck for further improvement. Therefore, it\nis urgent to develop novel anode materials with superior performance.\nHerein, we propose crystalline–amorphous dual-phase CaVO<sub>3</sub> nanocomposites as LIB anodes. Benefiting from the stable\nperovskite structure and high conductivity of CaVO<sub>3</sub>, the\nnanocomposite follows the intercalation mechanism, resulting in no\ncapacity decay during 5000 cycles. In addition, due to the multielectron\ntransfer provided by amorphous high-valent vanadium oxide, the nanocomposite\ncan provide a high specific capacity of 442.8 mAh g<sup>–1</sup> with a suitable average working potential of 0.95 V. The ingenious\nstrategy of constructing nanocomposites through spontaneous oxidation\nof nanoparticles is expected to be extended to the perovskite oxide\nfamily, inspiring the development of more high-performance LIB anodes.