Abstract
Transition metal carbides as promising electrode materials for lithium ions batteries (LIBs) have attracted wide attentions due to high conductivity and capacity. In this paper, dual-phase VC-C as anode materials of LIBs is designed and synthesized through green and controllable in-situ electroconversion from CO 2 and NaVO 3 in molten salt. Three products including dual-phase VC-C (VC–C), vanadium carbide doped by carbon (VC-DC) and carbon doped by vanadium carbide (C-DVC), are prepared by the effective regulation during molten salt electrolysis. It is confirmed that dual-phase VC-C as anode materials of LIBs exhibits the best charge/discharge performance and cycling stability. At current density of 0.1 A g −1 , the stable reversible capacity can reach to 652.3 mAh g −1 . Even at a high current density of 1.0 A g −1 , the reversible capacity maintains about 300 mAh g −1 after 600 cycles. The capacity retention is as high as 98.4%. The average capacity loss of per cycle is only 0.0027%. The dual-phase VC-C through sustainable electroconversion from CO 2 and NaVO 3 in molten salt is of good promising anode materials for LIBs.
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