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通过使用过的离子电池中固有的杂质直接再生LiFePO₄阴极

Meiting Huang¹, Zhihao Wang¹, Haitao Yang²

¹National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China.

Journal of colloid and interface science

|October 10, 2024

概括

本研究提出了一种成本效益高的方法,用于利用残留杂质再生耗尽的铁酸盐 (LiFePO4) 阴极. 这种新的方法通过提高材料性能而不去除杂质来提高电池回收.

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
可持续化学可持续化学

背景情况:

使用过的铁酸盐 (LiFePO4) 阴极带来了回收的挑战.
直接再生方法为电池回收提供了具有成本效益的解决方案.
废旧电池材料中的杂质去除通常是一个复杂而昂贵的步骤.

研究的目的:

为使用过的LiFePO4 (S-LFP) 阴极开发一种新的直接再生战略.
调查剩余导电碳和聚乙烯化物 (PVDF) 作为固有的还原剂的使用.
为了提高再生LiFePO4.4的储存性能.

主要方法:

提出了S-LFP的直接再生策略,而不需要去除杂质.
在再生过程中利用剩余的导电碳和PVDF作为减少剂.
引入葡萄糖 (10%) 以进一步提高再生LiFePO4.4的性能.

主要成果:

确定了Li+损失和转换为FePO4作为S-LFP的主要故障模式.
剩余碳和PVDF在S-LFP再生中的积极作用.
在再生LFP的晶体结构和化学成分方面取得了显著的恢复.
经过再生的LFP,添加了10%的葡萄糖,性能与商业LiFePO4.4相比.

结论:

这种新的再生方法有效地利用了S-LFP中的残留杂质.
该方法为电池回收提供了一个具有成本效益和信息性的策略.
剩余组件的最大化利用可以提高储存性能.

关键词:

导电性碳是一种导电性碳.直接再生再生的直接再生电化学性能电化学性能电化学性能这是一个PVDF.在 S-LFP 阴极上.

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