离子液体和低共熔溶剂绿色回收废旧锂离子电池的研究进展

doi:10.16085/j.issn.1000-6613.2022-0255

摘要/Abstract

摘要：

温和条件下废旧锂离子电池的绿色高效回收具有重大意义，目前利用离子液体和低共熔溶剂回废旧收锂离子电池的综述报道较少。本综述回顾近年离子液体和低共熔溶剂回收废旧锂离子电池，分析离子液体和低共熔溶剂对不同锂离子电池正极材料回收的差异性，介绍绿色溶剂结构、酸碱性、电池组成、温度、时间、质量比等因素对回收的影响，归纳绿色溶剂回收废旧锂离子电池的热力学和动力学规律及其溶解机制，并指出利用离子液体和低共熔溶剂回收废旧锂离子电池目前存在的一些问题及其提出可能的应对策略。

关键词: 溶解, 离子液体, 浸取, 溶剂, 热力学, 回收

Abstract:

The green and efficient recovery of lithium-ion batteries at mild temperature is very important. This review introduces DESs and ILs for recycling cathode materials, aluminum foil and copper foil from spent lithium-ion batteries and provide the prospects for the future. The difference in recycling lithium-ion batteries cathode materials by ILs and DESs are analyzed. The effect of chemical structure, acidity, temperature, time and mass ratio is particularly discussed. The thermodynamic and kinetic laws and dissolution mechanism of recycling waste lithium-ion batteries with green solvents are summarized. It also pointes out some problems existing in the recycling of waste lithium-ion batteries with ILs and DESs and put forward possible countermeasures.

Key words: dissolution, ionic liquids, leaching, solvents, thermodynamics, recovery

中图分类号:

TQ152

陈钰, 刘冲, 邱于荟, 贲梓欣, 牟天成. 离子液体和低共熔溶剂绿色回收废旧锂离子电池的研究进展[J]. 化工进展, 2022, 41(S1): 485-496.

CHEN Yu, LIU Chong, QIU Yuhui, BI Zixin, MU Tiancheng. Ionic liquids and deep eutectic solvents for green recycle of spent lithium-ion batteries[J]. Chemical Industry and Engineering Progress, 2022, 41(S1): 485-496.

图/表 8

图1 pH对[P8888][Oleate]回收模拟废旧锂离子电池三元锂正极材料中金属效率的影响[38]

表1 离子液体[P8888][Oleate]与其他萃取剂的钴镍分离比、价格及稀释剂[39]

萃取剂缩写	萃取剂中文名	价格 /USD·kg^-1	钴镍分离比	（原始钴/镍溶液浓度） /g·L^-1	稀释剂	参考文献
Cyanex 272	双（2，4，4-三甲基戊基）膦酸	1~160	750	14/15	煤油	［41］
PC88A	2-乙基己基膦酸单-2-乙基已酯	6~8	42	21/1	煤油	［42］
D2EHPA	二（2-乙基己基）磷酸	2~30	14	—	煤油	［43］
［P₈₈₈₈］［Oleate］	四辛基膦油酸型离子液体	10	30000	15/21	—	［39］

图2 各因素对萃取剂回收的影响[38]

图3 pH和离子液体浓度[N1111COOH][Tf2N]对金属萃取效率的影响以及离子液体[N1111COOH][Tf2N]浓度对分配系数和分离比的影响[47]

图4 温度和时间对在离子液体[BMIM][BF4]介质中铝箔和钴酸锂正极材料剥离率的影响[49]

图5 时间、温度、钴酸锂与氢键供体质量比和低共熔溶剂摩尔比对氯化胆碱∶对甲基苯磺酸∶水回收钴酸锂正极材料时钴浸出效率的影响[54]

图6 时间和温度对聚乙二醇200∶硫脲(2∶1)回收钴酸锂正极材料时钴浓度的影响[56]

图7 摩尔比、低共熔溶剂质量、时间和温度对聚乙二醇200∶对甲基苯磺酸回收钴酸锂正极材料时钴浸出效率的影响[59]

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