封闭循环阴极在固态电池中的回收利用是通过超分子电解质实现的
Jiwoong Bae1, Zhuoying Zhu2, Jiajun Yan3
1The Molecular Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA.
Science advances
|August 11, 2023
概括
研究人员为固态电池 (SSB) 开发了新的有机离子 (ORION) 电解质. 这些电解质可以轻松回收阴极,延长电池寿命,促进储能可持续性.
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:
- 固态电池 (SSB) 的回收是具有挑战性的,因为难以分离诸如阴极和固体电解质等组件.
- 目前用于解构和重新制造SSB材料的方法是密集且昂贵的.
研究的目的:
- 设计新型电解质,以促进高性能SSB的制造和其生命周期结束的回收利用.
- 开发一种有效回收和重复使用SSB的阴极材料的方法.
主要方法:
- 开发具有可调节粘弹性质的高分子有机离子 (ORION) 电解质.
- 使用ORION电解质,金属阳极和LFP/NMC阴极制造和测试SSB.
- 实施低温溶剂工艺用于阴极隔离和细胞翻新.
主要成果:
- 在工作温度 (-40°C至45°C) 上,Orion电解质表现出粘弹性固体行为,在100°C以上表现出粘弹性液体行为.
- 带有ORION电解质的SSB在45°C下经过数百个周期的稳定循环,容量衰减<20%.
- 使用回收式阴极进行翻新的细胞恢复了90%的初始容量,并在第二个生命周期中经过100个周期后保持了84%.
结论:
- 奥里昂电解质为制造可回收的固态电池提供了可行的解决方案.
- 开发的回收过程显著提高了SSB技术的可持续性和经济可行性.
- 这种方法为先进电池制造领域的循环经济铺平了道路.
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