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从使用过的离子电池中直接升级正极材料的无污染物热解策略

Pengwei Li¹, Shaohua Luo², Guodong Hao³

¹School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; Department of Chemistry and Bioscience, Aalborg University, Aalborg 9220, Denmark.

Journal of hazardous materials

|November 19, 2024

概括

这项研究引入了一种新方法,通过向正极材料添加来回收离子电池 (LIB). 这一过程可以防止在热解过程中释放有害的化物气体,并再生阴极活性材料 (CAM) 以实现可持续的电池回收利用.

科学领域:

材料科学材料科学材料科学
环境科学环境科学
化学工程是化学工程的重要组成部分.

背景情况:

离子电池 (LIB) 的回收对于可持续性至关重要.
从聚乙烯化物 (PVDF) 中,LIBs的热解产生危险的化物空气污染物 (例如,HF,PF5,POF3).
化物排放带来环境风险,并腐蚀设备.

研究的目的:

开发一个环保的战略,用于直接升级正极活性材料 (CAM).
在LIB热解过程中减轻有毒化物气体的释放.
为了提高回收的正极材料的稳定性和性能.

主要方法:

将少量的纳入正极材料涂层.
在降低温度下在废电池材料分离过程中使用机械.
采用有氧烧解来将化物污染物转化为稳定的金属化物.

主要成果:

消除在热解过程中释放的含有机污染物.
化物污染物的转化为金属化物沉积在阴极颗粒上.
提高,,,氧化物 (NCM) 材料的界面稳定性.
从阴极材料中减少过渡金属的溶解.
实现了CAM的直接再生.

结论:

这种新的策略有效地防止了LIB热解过程中的化物气体排放.
结合和机械使CAM能够直接再生.
这种方法为电池回收提供了一个环保和经济可行的解决方案.
优化阴极材料的制造过程是有效LIB回收的关键.

关键词:

阴极材料的材料是正极材料.没有污染物的无污染物.热解是一种热解过程.回收回收是回收的过程.使用过的离子电池.

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