以正极材料为磷酸钒锂的废旧锂离子电池为原料,探索废旧锂离子电池的正极材料磷酸钒锂在有机酸草酸中的最佳溶解条件,采用溶胶-凝胶法回收制备可利用的、新的磷酸钒锂正极材料.结果表明当草酸浓度为1.00 mol·L-1,料液比为40~45 g·L-1,80 ℃下搅拌15~20 min溶解性最优.用溶胶-凝胶法回收制备的磷酸钒锂表现出优异的充放电性能.%In the work, the cathode material has been recycled for the waste lithium-ion batteries using Li3V2(PO4)3 as cathode.The dissolving conditions of Li3V2(PO4)3 into oxalic acid have been explored.Then, new Li3V2(PO4)3 has been prepared via the sol-gel method from the recycling solution.The results show that optimal dissolving conditions are the concentration of 1.00 mol·L-1 for oxalic acid, the solid-liquid ratio of 40~45 g·L-1,stirring for 15~20 min at 80 ℃.The new Li3V2(PO4)3 shows good electrochemical performance.
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