在从制造废弃物回收离子电池阴极中对的耐受性准则
Huisu Jeung1, Gigap Han1, Chan Mi Jeon1
1Department of Energy & Mineral Resources Engineering, Sejong University, Seoul, 05006, Republic of Korea.
Chemosphere
|September 12, 2025
概括
在回收的离子电池阴极中的杂物通过增强结构稳定性,提高了高达0.5%的可循环利用性. 过多的阻碍了性能,为经济的电动汽车电池回收提供了指南.
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:
- 电动汽车 (EV) 的增长增加了离子电池 (LIB) 浪费.
- 回收LIB对于资源回收和可持续性至关重要.
- (Zr) 可能是复合阴极活性材料中的杂质.
研究的目的:
- 研究Zr杂质对再合成LiNi0.6Co0.2Mn0.2O2 (NCM622) 阴极材料性能的影响.
- 确定最佳的Zr含量,以提高结构稳定性和电化学性能.
- 制定LIB回收中可接受的Zr杂质含量准则.
主要方法:
- 合成含有Zr的NCM622样本,其中Zr含量各不相同 (0,0.1,0.5,1mol%).
- 电化学表征,包括充放电能力,速率能力和循环测试.
- 对结构稳定性和Li+扩散系数的分析.
主要成果:
- 增加的Zr含量导致了更高的阴离子混合和减少的初始容量.
- 随着Zr含量增加,由于Li+扩散减少,速度能力下降.
- Zr 兴奋剂显著改善了循环和结构稳定性,在 ~ 0.5 mol% Zr. 的情况下具有最佳性能.
- 过度的Zr (>1 mol%) 由于电化学不活性而对性能产生负面影响.
结论:
- 适度的Zr兴奋剂 (∼0.5mol%) 增强了NCM622阴极材料的结构稳定性和循环性.
- 对于高效的LIB回收和经济可行性来说,Zr杂质容忍水平至关重要.
- 这项研究为处理回收电池材料中的杂质提供了必要的数据.
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