非破坏性的闪电阴极回收利用
Weiyin Chen1, Yi Cheng1, Jinhang Chen1
1Department of Chemistry, Rice University, 6100 Main Street, Houston, TX, 77005, USA.
Nature communications
|July 24, 2024
概括
闪光回收提供了一种有效的方法来回收离子电池 (LIB) 阴极. 这种无溶剂的工艺恢复了可重复使用的阴极结构,比传统的回收利用具有环境和经济优势.
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
- 可持续能源 可持续能源
背景情况:
- 退役的离子电池 (LIB) 由于堆积的废物和资源枯竭而带来了环境挑战.
- 目前的回收方法往往涉及破坏性过程,损害了阴极材料的完整性.
- 直接再生方法因需要恶劣的条件或材料降解而受到限制.
研究的目的:
- 开发一种新的,对环境无害的方法,从消耗的LIB中恢复功能性阴极.
- 评估回收的正极材料的电化学性能和可持续性.
- 将拟议的回收过程与现有的破坏性方法进行比较.
主要方法:
- 使用无溶剂和无水的快速焦尔加热 (FJH) 技术处理废弃的LIB阴极.
- 使用磁分离来隔离和净化回收的阴极材料.
- 进行了固态重新化,以恢复再生阴极的含量.
主要成果:
- 在毫秒内,FJH工艺实现了大约98%的高电池金属回收率.
- 恢复过来的阴极保留了它们的核心结构和层次特征,适合重组.
- 再化阴极的电化学性能与新的商业LIB阴极相提并论.
结论:
- 闪光回收为LIB阴极回收提供了一个高效和可持续的途径.
- 该方法保留了阴极形态和电化学活性,使直接重复使用成为可能.
- 与传统回收相比,生命周期分析证实了优越的环境和经济效益.
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