In recent years,the market demand for lithium-ion batteries has surged,leading to a dramatic increase in the price of raw materials.Herein,Fe3(PO4)2/sodium gluconate phosphate ester and Li3PO4 powders were prepared by the reactions of expired ferrous gluconate and spent lithium foil with H3PO4,respectively,followed by using iron phosphate process to obtain LiFePO4/C nano-particles,and their Li-storage performances were investigated.The research results showed that the reversible capacity and capacity retention of LiFePO4/C cathode after 300 cycles at 1.0C were as high as 129.3mAh/g and 97.0%,respectively,which were comparable to those of commercial LiFePO4 cathode materials,mainly benefiting from the synergistic effect of nanoparticles and carbon layer.Undoubtedly,this research reduced the preparation cost of LiFePO4 and the environmental emission.
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基金资助
国家自然科学基金(52263010);云南省第十九批中青年学术技术带头人项目(1097-10978240)
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