The recovery of lithium iron phosphate cathode material is studied by an acid leaching-precip-itation-solid phase regeneration method.The optimum acid leaching conditions are 0.3 mol/L concen-trated sulfuric acid and 9%hydrogen peroxide.The leaching rate of Li can reach 96.7%.The electro-chemical performance of the regenerated lithium iron phosphate material is tested.The discharge specific capacity is 127 mAh/g at 0.1 C.After 100 cycles at 1 C,the charge-discharge platform is basically con-sistent,the cycle reversibility and stability are good,and the electrochemical performance is good.Experi-ments show that an appropriate concentration of hydrogen peroxide can inhibit the leaching of Fe and con-vert it into FePO4 precipitation,which provides a new idea for the treatment of waste lithium iron phos-phate cathode materials.
关键词
废磷酸铁锂/酸浸/再生/性能测试
Key words
waste lithium iron phosphate/scid leaching/regeneration/performance testing
维普
万方数据