Electrochemical performance of LiFePO4-Li3V2(PO4)3 composite material prepared by solid-hydrothermal method

LiFePO4-Li3V2(PO4)3 composites were synthesized by solid-hydrothermal method and by ball milling, respectively. The electrochemical performance of the solid-hydrothermally obtained materials (C-LFVP) was significantly improved compared with LiFePO4 (LFP) and Li3V2(PO4)3 (LVP), and it was also much better than that of the ball-milled LiFePO4-Li3V2(PO4)3 (P-LFVP). C-LFVP and P-LFVP both had four REDOX peaks (voltage plateaus), which coincided with that of LFP and LVP. Some new trace substances were found in C-LFVP which had more perfect morphology, this was responsible for the better electrochemical performance of C-LFVP than P-LFVP.