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基于选择性硫化处理的使用过的离子电池的闭环回收:一种非常规的方法

Kunhong Gu¹, Xuesong Gao¹, Yuxin Chen¹

¹School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China.

Waste management (New York, N.Y.)

|July 2, 2023

概括

本研究提出了一种环保方法,用于回收使用的离子电池 (LIB). 该过程有效地回收,,和再利用,证明再生电池材料的高容量保留.

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:

使用过的离子电池 (LIB) 带来了环境挑战,并损失了宝贵的资源.
有效的回收对于可持续的资源管理和减少处理电池对环境的影响至关重要.

研究的目的:

为循环利用使用的LiNi_xCo_yMn_zO₂ (NCM) 电池开发一种新且简单的工艺.
从NCM电池废物中获得贵金属 (Li,Mn,Ni,Co) 的高回收率.

主要方法:

通过优化烤条件和热力学计算,选择性硫化消耗的NCM材料.
连续的浸出过程优先提取作为Li2和CO3和作为MnSO.
在洗残留物中和硫化物的度用于进一步回收.

主要成果:

通过水浸实现了超过98%的提取,使用0.4mol/L H₂SO₄溶液实现了超过99%的提取.
成功缩了没有金属杂质的和硫化物.
再生NCM材料表现出优异的电化学性能,在0.2C时的放电容量为169.8 mAh/g,在100个循环后92%的容量保留.

结论:

开发的过程是一种经济和环保的方法,用于使用过的LIBs的绿色回收.
回收的材料可以有效地再生成新的NCM阴极材料,具有有前途的性能.
这种方法有助于资源循环,并减少与电池废物相关的环境负担.

关键词:

循环经济是一个循环经济.危险固体废物危险固体废物阴极材料的再生阴极材料的再生选择性的硫化.使用过的电池.水的泄漏,就是水的泄漏.

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