通过闭环过程回收离子电池阴极,使用化胆-乙烯糖醇基深性溶剂,在酸的存在下进行循环回收
Delphine Yetim1,2, Lenka Svecova1, Jean-Claude Leprêtre1
1Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, 38000, Grenoble, France.
ChemistryOpen
|July 26, 2023
概括
这项研究表明,一种胆化物:乙烯基醇深溶解剂 (DES) 能有效地溶解添加HCl的离子电池中的氧化物 (LCO). 回收的和可以沉,DES可以在没有效率损失的情况下重复使用两次.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 绿色化学 绿色化学
背景情况:
- 氧化 (LCO) 是离子电池中一个关键的阴极材料.
- 有效回收使用的离子电池对于可持续性至关重要.
- 深度浸泡溶剂 (DES) 为电池材料回收提供了一个有前途的替代方案.
研究的目的:
- 为了评估胆化物:以乙烯糖醇为基础的DES用于溶解LCO.
- 为了研究盐酸 (HCl) 对LCO溶解的影响.
- 评估DES系统的回收和再利用潜力.
主要方法:
- 使用DES溶解商业LCO粉末和废电池阴极.
- 添加HCl以促进LCO溶解.
- 使用碳酸 (Li2CO3) 沉 (Co) 和 (Li).
- 多个循环的DES重复使用.
主要成果:
- 在80°C以最佳的HCl添加的情况下,在2小时内实现了快速有效的LCO溶解.
- 在每颗原子添加>3个质子时观察到完全溶解.
- 在没有DES降解的情况下,Co和Li成功沉 (pH<10).
- 在两个重复使用周期中,DES证明了效率,没有检测到任何降解产品.
结论:
- 使用HCl的DES系统是从离子电池中溶解LCO的可行和高效方法.
- 这种方法在反应时间和温度方面比传统方法具有优势.
- 可以重复使用DES,支持可持续的电池回收过程.
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