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- W4308489944 abstract "Na3V2(PO4)2F3 is considered as one of the most promising cathode materials for sodium-ion batteries (SIBs). However, the low electronic conductivity of this material severely restricts its electrochemical performance. Herein, Cr-doped Na3V2(PO4)2F3/C material was synthesized by a simple sol-gel method, and the effects of Cr3+ doping on the structure, morphology and electrochemical performance were systematically investigated. The optimized material Na3V2-xCrx(PO4)2F3/C (x = 0.05) exhibits high initial discharge capacity of 101.9 mAh g−1 at 10 C and keep a capacity retention of 68.7 % after 1000 cycles. The improved electrochemical performance can be attributed to the higher crystallinity, improved intrinsic electronic conductivity and sodium ion diffusion coefficient due to the doped Cr3+, which accelerates the electron transport and charge transfer rate. The optimized Cr-doped Na3V2(PO4)3F3/C material obtained in this work can promote the practical application of Na3V2(PO4)3F3 cathode." @default.
- W4308489944 created "2022-11-12" @default.
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- W4308489944 date "2023-01-01" @default.
- W4308489944 modified "2023-09-25" @default.
- W4308489944 title "Effect of Cr3+ doping on the electrochemical performance of Na3V2(PO4)2F3/C cathode materials for sodium ion battery" @default.
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- W4308489944 doi "https://doi.org/10.1016/j.electacta.2022.141491" @default.
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