A novel approach to LiVO3 synthesis enables its outstanding lithium storage performance

Li3VO4 has been proven to have great potential as an alternative anode for lithium-ion batteries (LIBs), while the high cost of lithium resources and limited reserves inhibit its radiance. LiVO3 with fewer lithium atoms has been widely studied as a cathode for LIBs. The lithium storage mechanism and synthesis method of the LiVO3 anode are still in the preliminary stage. Herein, LiVO3-N-2 was prepared through hydrothermal method and subsequent annealing in nitrogen atmosphere for the first time. As an anode, the LiVO3-N-2 presents high capacity of 715 mAh g(-1) after 300 cycles at 0.2 A g(-1), and long cycling life of 120 mAh g(-1) after 3000 cycles at 5.0 A g(-1), outperforming all reported LiVO3-based anode materials. Even after 6-period rate property testing from 0.2 to 2.0 A g(-1) over 310 cycles, the LiVO3-N-2 electrode still resumes high capacity of 520 mAh g(-1) when the current returns to 0.2 A g(-1). Such excellent electrochemical performances are attributed to the high and gradually increasing pseudocapacitive contribution storage upon cycling originated from self-adaptive reaction kinetics. The novel approach to LiVO3 synthesis and the remarkable lithium storage performance of the LiVO3-N-2 provide impetus for further development of LiVO3 anode.

Automated summary

LiVO3-N-2, prepared by hydrothermal method and nitrogen annealing, is an excellent anode material with high capacity and long cycling life. The outstanding electrochemical performances can be attributed to the gradually increasing pseudocapacitive contribution storage and self-adaptive reaction kinetics during cycling.