将电化学水与溶剂提取相结合,用于回收使用过的离子电池
Jingjing Zhao1, Fengyin Zhou1, Hongya Wang1
1School of Resource and Environmental Science, Wuhan University, 299 Bayi Road, Wuchang District, Wuhan 430072, P. R. China.
Environmental science & technology
|September 10, 2024
概括
这项研究引入了一种结合电化学液和溶剂提取的新方法,用于高效的离子电池回收. 这种综合工艺显著改善了和的回收,同时降低了环境影响和成本.
科学领域:
- 材料科学与工程 材料科学与工程
- 电化学 电化学 电化学
- 水电金术是指用水电金术进行金术.
- 回收技术的回收技术
背景情况:
- 使用过的离子电池 (LIB) 由于含有宝贵金属而带来了重大环境挑战.
- 目前的回收方法往往涉及强化学品和多个复杂的步骤,导致效率低下和污染.
- 对 (Li) 和 (Co) 等关键金属的有效回收对于可持续的电池生产至关重要.
研究的目的:
- 开发和评估一个整合的流程,以从消耗的LIB中分离和回收Li和Co.
- 研究将电化学浸出与溶剂提取相结合的协同效应.
- 评估拟议的回收方法的经济和环境可行性.
主要方法:
- 在水性电解质中进行电化学液,将固体LiCoO2转化为可溶性Li+和Co2+,使用电子作为减电剂.
- 在水性有机界面同时进行溶剂提取,以选择性地将Co2+从Li中分离,利用P507中的质子.
- 使用残留层扩散控制模型进行动态分析,并确定激活能量 (Ea).
主要成果:
- 和的液产量大约是传统的酸液的七倍,没有溶剂提取.
- 2+的提取效率在60°C和3.5V时达到86%,+的共同提取最小.
- 综合工艺证明了减少化学品消耗,增强质子利用,简化回收,低激活能为Li (4.03 kJ/mol) 和Co (7.80 kJ/mol).
结论:
- 将电化学洗与溶剂提取相结合,为从消耗的LIB中回收Li和Co提供了一种高效和协同的方法.
- 与传统方法相比,该方法显著提高了金属回收率,减少了环境污染,并提高了经济效益.
- 该过程在动力学上是有利的,并显示出可持续LIB回收利用的巨大潜力.
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