在从使用过的离子电池阴极材料中去除时,的化动力学
1Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Journal of environmental sciences (China)
|December 22, 2023
概括
从使用过的离子电池阴极粉中去除对于资源回收至关重要. 这项研究优化了Al出,并研究了协同的去除,这对于污染控制和回收效率至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 从使用过的离子电池 (LIB) 中回收的正极粉末含有高 (Al) 杂质.
- 杂质显著降低了回收贵金属如,,和的效率和商业价值.
- 为了满足回收的正极材料的工业标准,需要有效地去除Al.
研究的目的:
- 系统地研究从已耗尽的LIB阴极粉中去除Al的浸出过程和最佳条件.
- 研究Al去除过程中 (F) 的协同泄露,这是防止污染的关键因素.
- 阐明Al和F出的机制,并探索除化策略.
主要方法:
- 系统地调查漏过程和除Al的最佳条件.
- 使用NMR,FTIR和XPS进行协同化的分析.
- 对 Al 和 F 浸过程的动态建模.
主要成果:
- 确定了从阴极粉中去除Al的最佳条件.
- 的出动力学遵循缩小核心模型,通过扩散控制,激活能量为11.14kJ/mol.
- 归因于LiPF6溶解和PVDF分解的化,是由Avrami模型描述的,Al-F相互作用有助于除化.
结论:
- 有效的Al去除策略对于提高回收LIB阴极材料的价值至关重要.
- 了解协同的Al和F漏,可以了解电池回收过程中的污染控制.
- 这项研究为大规模回收使用的LIBs提供了理论支持.
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