接口准载体-催化剂集成设计,促进二甲基丰富的SEI,实现长寿命固态金属电池的高接口稳定性
Xuanyi Zhou1, Fenfen Huang2, Xuedong Zhang2
1Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China.
Angewandte Chemie (International ed. in English)
|March 28, 2024
概括
一个新的载体催化设计为所有固态电池创建了一个稳定的固体电解质介面 (SEI). 这提高了离子传输和循环稳定性,显示了储能应用的潜力.
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:
- 全固态电池的性能在很大程度上依赖于固体电解质介相 (SEI).
- 开发稳定高效的SEI层对于推进电池技术至关重要.
研究的目的:
- 在现场建造一个稳定的LiF-LiBr丰富的SEI,使用一种新的"载体-催化"综合设计.
- 为了改善电子转移动力学和加速SEI形成的断键动态.
- 为了增强离子运输和调节电池中的沉积行为.
主要方法:
- 使用"载体-催化"综合设计策略.
- 采用 Br-TPOM 骨架来增强电子传输和促进 LiBr 生产.
- 通过促进TFSI的C-F债券断裂来促进LiF的形成.
- 研究了 LiF 和 LiBr 在 SEI 建设中的现场共同生长机制.
主要成果:
- 成功构建了一个稳定,均的人工SEI,富含二化物.
- 通过使用PEO-Br-TPOM/LiFePO4.4实现了超长周期稳定性 (>1000个周期,在1C保持81%).
- 在没有外部压力的实用袋式电池中,证明了优异的容量保留 (88%在550个循环后).
结论:
- 载体催化设计有效地促进了稳定的LiF-LiBr丰富的SEI的形成.
- 设计的SEI显著提高了离子运输动力学和自行车性能.
- 该研究强调了这种方法在储能领域的实际应用中的潜力.
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