Abstract
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
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