化物分离以增强全固态-电池
Jieun Lee1, Shiyuan Zhou1, Victoria C Ferrari1
1Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, USA.
概括
完全固态电池中的机械化学混合会导致化物分离,形成介面层,增强-素细胞的离子运输和稳定性. 这一突破提升了下一代储能系统的性能和使用寿命.
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- 复合电极制造是全固态电池的关键,但人们对其了解甚少.
- 接口稳定性和离子传输对于电池性能至关重要.
研究的目的:
- 研究复合电极混合过程中的机械化学反应.
- 在固态电池的接口上了解化物分离.
主要方法:
- 超高速混合电活性材料,固态电解质和导电碳.
- 多模同步射线探测器和冷传输电子显微镜用于表征.
主要成果:
- 由于机械化学反应而在接口上观察到的通用化物分离.
- 在现场形成的化物层改善了离子传输,抑制了阴极体积变化.
- 在全固态-细胞中显示了接近100%的利用率和出色的循环稳定性.
结论:
- 机械化学混合提供了一个在固态电池中设计有益的接口层的途径.
- 这些发现为高能,稳定的全固态-电池铺平了道路.
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