表面分离辅助消耗层天道的直接再生
Jie Tang1, Haocheng Ji1, Nengzhan Zheng1
1Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, P.R. China.
Angewandte Chemie (International ed. in English)
|March 2, 2026
概括
一个新的分离辅助策略通过转换惰性岩盐相来再生耗尽的离子电池阴极. 这种方法提高了的补充和结构稳定性,以实现可持续的电池循环利用.
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
- 可持续化学 可持续化学
背景情况:
- 使用过的离子电池阴极带来了环境和经济挑战.
- 在降解的正极材料中,惰性岩盐相阻碍了直接再生.
- 有效的补充和相重建对于有效的再生至关重要.
研究的目的:
- 开发一种新的隔离辅助再生战略,用于已耗尽的正极材料.
- 在直接再生中克服惰性岩盐相的局限性.
- 为了增强离子扩散,结构重建和再生阴极的稳定性.
主要方法:
- 在使用过的LiNi0.5Co0.2Mn0.3O2 (NCM523) 阴极的再生过程中引入了高价值 (W6+).
- 利用W6+的分离行为来调节反应热力学.
- 诱导NiO型岩盐相的现场转化.
主要成果:
- 该战略成功地促进了岩盐阶段在现场转化为Li-W-Ni-O化合物和Li2WO4.
- 经过再生的NCM523阴极表现出高可逆容量 (150mAhg-1在0.5°C) 和出色的循环稳定性 (83%的容量保留在800个循环后).
- 该方法对其他降解分层阴极材料 (例如NCM622,NCM811) 具有广泛的适用性.
结论:
- 隔离辅助再生战略为回收使用的离子电池阴极提供了一个可扩展,能效和可持续的途径.
- 这种方法有效地解决了惰性岩盐阶段带来的挑战,提高了再生效率.
- 该研究为推进电池技术中的循环经济原则提供了一个有希望的途径.
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