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在空气喷射处理后有效再生废弃LiFePO₄阴极材料的方法

Jun Ma¹, Ziyang Xu¹, Tianshun Yao¹

¹Jiangsu Innovation Platform of Lithium Composite-Materials for Battery R&D, Institute of Energy Supply Technology for High-end Equipment, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, Jiangsu,China.

ACS applied materials & interfaces

|November 13, 2024

概括

使用一种新型固相方法回收废铁酸盐 (LFP) 电池,有效地再生阴极材料. 这种环保的工艺避免了危险的废物,并恢复了高电化学性能,以实现可持续的电池再利用.

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
环境科学环境科学

背景情况:

废弃的铁酸盐 (LFP) 电池对环境构成风险,并损失了宝贵的资源.
目前的回收方法可能涉及强化学品,产生大量的废物流.

研究的目的:

为废弃的LFP阴极材料开发一种高效和环保的固态循环回收方法.
研究回收LFP的再生机制和电化学性能.

主要方法:

空气发射以从废弃物中去除杂质 LFP.
用碳酸和三甲胺进行热处理,用于材料修复和表面修改.
物理表征和电化学测试,以评估再生的LFP.

主要成果:

再生LFP实现了0.2°C时152.87mAhg-1的特异性放电容量 (95.32%的商业LFP).
在1C的600个循环后,容量保留达到88.52%.
该过程成功地将Fe3+转化为Fe2+并形成了N-化碳层,增强了电化学特性.

结论:

拟议的固体相再生方法简单,高效,环保,避免酸性/性废物.
这种方法为使用过的LFP电池的可持续回收提供了一个有希望的途径.

关键词:

空气烧焦的气体涂层涂层是一种涂层.电池是一种电池.铁酸盐材料是一种铁酸盐材料.复兴再生是一种再生方式.

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