Abstract
Li-ion battery cathode material lithium-vanadium-phosphate Li3V2(PO4)3 was synthesized by a carbon-thermal reduction method, using stearic acid, LiH2PO4, and V2O5 as raw materials. And stearic acid acted as reductant, carbon source, and surface active agent. The effect of its content on the crystal structure and electrochemical performance of Li3V2(PO4)3/C were characterized by XRD and electrochemical performance testing, respectively. The results showed that the content of carbon source has no significant effect on the crystal structure of lithium vanadium phosphate. Lihtium vanadium phosphate obtained with 12.3% stearic acid demonstrated the best electrochemical properties with a typical discharge capacity of 119.4 mAh/g at 0.1 C and capacity retention behavior of 98.5% after 50 cycles. And it has high reversible discharge capacity of 83 mAh/g at 5 C with the voltage window of 3 to 4.3 V.
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Acknowledgements
This work was supported by the Program for New Century Excellent Talents in University (No. NCET-10-0946), Science and Technology Innovation Research Team Construction Project of Sichuan Province (No. 2011JTD0039, No. 2015TD00008).
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Cui, X., Liu, T., Zhang, X. et al. Enhanced electrochemical performance of lithium ion battery cathode Li3V2(PO4)3/C. Ionics 23, 3289–3293 (2017). https://doi.org/10.1007/s11581-017-2128-4
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DOI: https://doi.org/10.1007/s11581-017-2128-4