Abstract
W-doped Li3V2(PO4)3/C cathode material is firstly proved useful for enhancing the electrochemical performance of high-rate Li3V2(PO4)3/C synthesized via a sample carbothermal method using meso-tetraphenylporphyrin (TPP) as carbon source. W-doped Li3W x V2−x (PO4)3/C (x = 0, 0.01, 0.02, 0.03, and 0.04) are prepared. The X-ray diffractometer, scanning electron microscopy, and high-resolution transmission electron microscopy are employed to characterize the prepared materials, and the evidences show that W-doping does not alter the structure of Li3V2(PO4)3 lattice. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) results show that appropriate W-doped sample has a relatively looser structure than the others. From the analysis of electrochemical performance, the Li3W0.03V1.97 (PO4)3/C composite exhibits more excellent electrochemical performance than the other samples. In addition, the electrochemical performance of the Li3W0.03V1.97 (PO4)3/C composite at 20 C rate is also investigated.
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Ma, Cx., Mao, Wf., Tang, Zy. et al. Synthesis of Li3W x V2−x (PO4)3/C cathode materials and their electrochemical performance for lithium-ion batteries. J Solid State Electrochem 19, 519–524 (2015). https://doi.org/10.1007/s10008-014-2630-9
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DOI: https://doi.org/10.1007/s10008-014-2630-9