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- W2922006055 abstract "The wide usage of LiFePO4 batteries makes their recovery and recycling urgent. Here, a novel, efficient and environmentally friendly recycling process has been developed to recover high performance LiFePO4 nano composites from spent LiFePO4 materials. The process comprises an intensive mechanochemical activation through mixing with precursor mixture and one-step solid state heat treatment. Spent LiFePO4, V2O5, Li2CO3, and NH4H2PO4 are mixed according to the molar ratio of 1-xLiFePO4@xLi3V2(PO4)3 (x = 0, 0.005, 0.01, 0.03 and 0.1). In the typical process, the decomposition of self-contained binder and the conductive carbon provide a reducing environment as well as an in-situ coating carbon source. The SEM, XRD and XPS results illustrate that V5+ is doped in the Fe2+ site when x < 0.01, with co-existence of V5+ doping and Li3V2(PO4)3 when x ≥ 0.03. Sole V5+ doping assisted in-situ carbon coating displays the best electrochemical performance. The optimized sample shows discharge capacities of 154.3 mA h g−1 and 142.6 mA h g−1 at 0.1 and 1 C rates, respectively, with a high capacity retention of nearly ∼100% after 100 cycles. All results indicate that intensive mechanochemical activation assisted V5+ doping is a promising strategy for spent LiFePO4 recycling." @default.
- W2922006055 created "2019-03-22" @default.
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- W2922006055 date "2019-06-01" @default.
- W2922006055 modified "2023-10-11" @default.
- W2922006055 title "Regenerating the used LiFePO4 to high performance cathode via mechanochemical activation assisted V5+ doping" @default.
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- W2922006055 doi "https://doi.org/10.1016/j.ceramint.2019.03.057" @default.
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