从使用过的离子电池 (LIB) 中回收关键金属的更绿色方法:没有减少剂的协同洗
Melina Roshanfar1, Majid Sartaj1, Siamak Kazemeini2
1Department of Civil Engineering, Faculty of Engineering, University of Ottawa, Ottawa, ON, K1N 6N5, Canada.
Journal of environmental management
|July 17, 2024
概括
这项研究提出了一种环保方法,用于从使用过的离子电池 (LIB) 中回收关键金属. 优化了与硫酸和酸的协同漏,实现了高回收率,降低了成本和环境影响.
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) 中有效回收关键金属对于可持续能源和工业至关重要.
- 传统的LIB回收方法面临着大量废物,有害排放和危险材料的挑战.
- 开发创新和环保的回收工艺对于解决这些局限性至关重要.
研究的目的:
- 研究创新的协同漏方法,从已耗尽的LIB中回收关键金属.
- 优化热处理和浸出条件,以提高金属回收.
- 开发一个成本效益高,对环境无害的LIB回收工艺.
主要方法:
- 优化热处理 (570°C2小时) 以去除粘合物,同时保持阴极材料的晶体性.
- 响应表面方法 (RSM) 具有I-最佳设计,用于研究硫酸 (SA) 和有机酸 (酸,酸) 的协同作用.
- 具有D-最佳设计的RSM,以优化水时间和温度,以及固体-液体比率.
主要成果:
- 优化的热处理保持了阴极材料的结晶性.
- 与硫酸和酸的协同漏证明比乙酸更有效,消除了对H2O2.2等减少剂的需求.
- 在最佳条件下 (189分钟,95°C) 实现了高回收率:99%的Li,98%的Co,90%的Ni和92%的Mn.
- 优化方法比传统方法大约有25%的成本效益.
结论:
- 开发的协同洗方法提供了一种高效,更简单,更环保的方法,用于从消耗的LIB中回收关键金属.
- 优化的热预处理和浸出条件显著提高了金属回收率.
- 这种具有成本效益的方法有助于可持续的电池回收和资源管理.
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