选择性提取和Fe-P组件重建,以实现高性能Na4Fe3(PO4) 2P2O7作为离子电池的阴极材料
Pei Yang1, Chao Sun1, Pei-Yao Li1
1School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China. xhzhang@csu.edu.cn.
Chemical communications (Cambridge, England)
|July 7, 2025
概括
硫酸盐氧化有效地从使用过的LiFePO4电池中回收98.08%的. 复制的正极材料具有出色的循环利用性,为可持续的电池回收和负担得起的能源存储铺平了道路.
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) 电池给环境带来了挑战.
- 对等关键材料的有效回收对于可持续的能源储存至关重要.
研究的目的:
- 开发一种方法来回收和从废弃的LiFePO4.4中重组阴极材料.
- 为了评估再生阴极材料的电化学性能.
主要方法:
- 使用硫酸盐 (Na2S2O8) 氧化已耗尽的LiFePO4.
- 铁酸盐成分通过插入和碳涂层进行复合.
- 对再生的阴极材料进行电化学测试,以测试可循环和容量保留.
主要成果:
- 通过Na2S2O8氧化实现98.08%的回收.
- 成功溶解成Na4Fe3(PO4)2P2O7/C. 已经成功溶解成Na4Fe3(PO4)2P2O7/C.
- 再生阴极在400个周期 (1C) 上保持了99.74%的容量,在600个周期 (5C) 上保持了97.23%.
结论:
- 拟议的方法使高回收和高性能阴极材料的再生成为可能.
- 这种方法为电池回收提供了一种可持续且具有成本效益的解决方案.
- 再生材料的优越循环利用性支持其在低成本的储能应用中使用.
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