Nd3+-doped Li3V2(PO4)3 cathode material with high rate capability for Li-ion batteries |
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| Authors: | Yue-Jiao Li Chuan-Xiong Zhou Shi Chen Feng Wua Liang Hong |
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| Institution: | a Beijing Key Laboratory of Environmental Science and Engineering, School of Chemical Engineering and the Environment, Beijing Institute of Technology, Beijing 100081, China;
b National Development Center for High Technology Green Material, Beijing 100081, China |
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| Abstract: | A series of Nd3+-doped Li3NdxV2-x(PO4)3 (x = 0.00, 0.02, 0.05, 0.08 or 0.1) composites are synthesized by the rheological phase reaction method. The XRD results indicate that Nd3+ ions have been successfully merged into a lattice structure. Doped samples show good electrochemical performance in high discharge rate and long cycle. In the potential range of 3.0-4.3 V, Li3Nd0.08V1.92(PO4)3 exhibits an initial discharge capacity of 115.8 mAh/g at 0.2 C and retain 80.86% of capacity retention at 2 C in the 51st cycle. In addition, Li3Nd0.05V1.95(PO4)3 holds at 100.4 mAh/g after 80 cycles at 0.2 C with a capacity retention of 92.4%. Finally, the CV test proves that the potential polarization of Li3Nd0.08V1.92(PO4)3 decreased compared with the un-doped one. |
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| Keywords: | Li3V2(PO4)3 Rheological phase reaction Nd3+ dope Electrochemical performance |
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