School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China; Hunan Provincial Key Laboratory of Chemical Power Sources, Central South University, Changsha 410083, China.
Waste Manag. 2022 Apr 15;143:186-194. doi: 10.1016/j.wasman.2022.02.024. Epub 2022 Mar 8.
With the growing number of lithium-ion batteries (LIBs) that are consumed by worldwide people, recycling is necessary for addressing environmental problems and alleviating energy crisis. Especially, it is meaningful to regenerate LIBs from spent batteries. In this paper, the microwave hydrothermal method is used to replenish lithium, assemble particles and optimize the crystal structure of the spent lithium cobalt oxide. The microwave hydrothermal process can shorten the reaction time, improve the internal structure, and uniformize the particle size distribution of lithium cobalt oxide. It helps to construct a regenerated lithium cobalt oxide (LiCoO) battery with high-capacity and high-rate properties (141.7 mAh g at 5C). The cycle retention rate is 94.5% after 100 cycles, which is far exceeding the original lithium cobalt oxide (89.7%) and LiCoO regenerated by normal hydrothermal method (88.3%). This work demonstrates the feasibility to get lithium cobalt oxide batteries with good structural stability from spent lithium cobalt oxide batteries.
随着全球人们消耗的锂离子电池（LIB）数量不断增加，回收利用对于解决环境问题和缓解能源危机是必要的。特别是，从废旧电池中回收 LIB 具有重要意义。本文采用微波水热法补充锂、组装颗粒并优化废氧化钴锂电池的晶体结构。微波水热工艺可以缩短反应时间，改善内部结构，使氧化钴锂电池的粒径分布均匀。它有助于构建具有高容量和高倍率性能（在 5C 下为 141.7mAh g）的再生氧化钴锂电池（LiCoO）。经过 100 次循环后，循环保持率为 94.5%，远远超过原始氧化钴锂电池（89.7%）和通过普通水热法再生的 LiCoO（88.3%）。这项工作证明了从废旧氧化钴锂电池中获得具有良好结构稳定性的氧化钴锂电池的可行性。
