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同质化能够有效地再生使用的富含的LiNiCoMn_1-O₂阴极

Xiangjun Liu^1,2, Penglei Yan³, Binglei Jiao³

¹Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, Department of Materials Science and Engineering, Harbin Engineering University, Harbin, Heilongjiang, 150001, China.

|April 25, 2025

概括

回收退化的高,,,,氧化 (NCM) 阴极是具有挑战性的. 温和的球磨重建阴极颗粒,使可持续电池通过重新化实现高效的再生.

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:

高,,,氧化 (NCM) 阴极为电动汽车提供高能量密度.
通过裂和碎片的降解限制了它们的使用寿命,需要有效的回收利用.
通过重新化进行直接再生是具有成本效益的,但由于NCM的机械降解而受到挑战.

研究的目的:

开发一种有效和经济的方法来再生机械降解的高NCM阴极.
为了克服在循环后的NCM中发生的颗粒间裂变和颗粒碎裂所带来的挑战.
提高离子电池回收直接再生技术的适用性.

主要方法:

在循环后的NCM阴极中利用弱化的粒度边界相互作用.
采用温和的球磨法进行形态重建和尺寸均化.
研究纳米粒子形成及其对离子扩散的影响.

主要成果:

轻度球磨实现了退化的NCM的形态重建和尺寸均化.
该过程产生了NCM纳米粒子,具有增强Li+扩散的方面.
在低温下,在较短的加工时间内实现了高效的再生.

结论:

轻度球磨是一种可行的策略,用于修复机械退化的NCM阴极.
纳米颗粒的形成缩短了扩散通路,使高效的低温再化成为可能.
这种方法推进了直接再生技术,并促进了电池的可持续发展.

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