分子量身定制的双重功能深度美容溶剂增强消耗的离子电池阴极分层和再生
Yunpeng Wen1, Zihao Zeng1, Jiexiang Li1
1School of Minerals Processing and Bioengineering, Central South University, Changsha, P. R. China.
Angewandte Chemie (International ed. in English)
|March 7, 2026
概括
一种新型的深溶解剂 (DES) 通过在低温下降解聚乙烯化物 (PVDF) 粘合剂,有效地回收离子电池阴极,在15分钟内实现>99%的分离.
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:
- 深度浸泡溶剂 (DES) 在回收离子电池方面表现有前途.
- 目前的DES方法需要高温 (>120°C) 和缓慢的动力学 (>30分钟).
- 聚乙烯化物 (PVDF) 粘合剂在高效的阴极材料分离方面提出了挑战.
研究的目的:
- 设计一种新的,低温的,快速起作用的DES,以高效地分离阴极材料和电流收集器.
- 通过使用开发的DES,研究PVDF结合剂的降解机制.
- 为了证明高纯度和保存结构的正极材料的可回收性.
主要方法:
- 通过使用二甲基 (基) 酸 (DHP) 和马龙酸 (MA) 合成了一种双功能的DES.
- 测试了DES的有效性,用于分离LiCoO2,LiFePO4和LiNi0.3Co0.3Mn0.3O2阴极材料.
- 分析了分离效率,动力学,温度要求和材料纯度.
主要成果:
- 在60°C时,DHP-MA DES在15分钟内实现了99%以上的LiCoO2分离效率.
- 通过核友性攻击和结合,DES促进了PVDF粘合剂的降解,降低了粘度.
- 分离的阴极材料含有较低的杂质含量 (<0.026重%) 和最小的金属损失 (<2重%),保留了其晶体结构.
结论:
- 开发的DHP-MA DES提供了一种高效和低温的策略,用于回收离子电池阴极材料.
- 这种方法可以回收适合重复使用的高性能阴极材料.
- 这些发现为可持续的电池回收提供了一种通用方法.
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