在离子电池中通过Zwitterionic结合剂化学调节阳极-电解质相间反应,这些电池具有高层氧化物阴极和-石墨阳极
Biyu Jin1, Andrei Dolocan1, Chen Liu1
1Materials Science and Engineering Program and Texas Materials Institute, The University of Texas at Austin, Austin, Texas, 78712, USA.
Angewandte Chemie (International ed. in English)
|July 17, 2024
概括
一种新的zwitterionic粘合剂通过创建稳定的固体电解质介相 (SEI) 来改善离子电池 (LIB) 中的阳极. 这提高了电池寿命和性能,即使使用高阴极.
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
- 电池技术 电池技术
背景情况:
- 离子电池 (LIB) 中的 (Si) 基阳极遭受降解,由高阴极的过渡金属交叉加剧.
- 粘合剂化学在稳定Si阳极上的固体电解质间相 (SEI) 中的作用需要更深入的研究.
研究的目的:
- 设计和评估用于控制SEI属性的Si基阳极的zwitterionic粘合剂.
- 了解粘合剂化学如何影响SEI的形成和稳定性.
主要方法:
- 合成用于Si阳极的zwitterionic粘合剂.
- 使用Si阳极和zwitterionic结合剂对LIB进行电化学测试.
- 分析SEI层的组成和形态.
主要成果:
- 兹维特里离子结合剂在阳极上创造了一个独特的离子丰富的溶解环境.
- 这种环境促进了薄,均和强大的SEI层.
- 设计的SEI有效地减轻了过渡金属沉积和寄生反应.
结论:
- 兹威特离子结合剂提供了一种在阳极上增强SEI稳定的策略.
- 这种方法可以提高高能量密度LIB的循环性能和耐用性.
- 结合剂化学对于克服Si阳极降解机制至关重要.
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