快速界面除动力使低温金属电池能够稳定循环
Xinpeng Li1, Menghao Li2,3, Yue Liu4
1Hefei National Laboratory for Physical Science at Microscale, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, PR China.
Journal of the American Chemical Society
|May 16, 2024
概括
具有快速脱动力的局部高度电解质 (LHCE) 在低温金属电池 (LMB) 中抑制树突. 这使得稳定的循环和高库伦比效率在-30°C.
科学领域:
- 电化学
- 材料科学
- 能量储存
背景情况:
- 低温金属电池 (LMB) 面临着树增长带来的挑战.
- 由于阳极和电解质相互作用而导致的树突形成的确切原因尚未完全理解.
研究的目的:
- 调查局部高度电解质 (LHCE) 中界面脱动学的作用,以控制树的形成.
- 了解LHCE中的溶解结构如何影响低温LMB的性能.
主要方法:
- 使用四水 (THF) 和2-甲基四水 (2-MeTHF) 的LHCE进行比较研究.
- 使用了全面的表征和理论模拟.
- 研究了表面除动力学和固体电解质间相 (SEI) 的形成.
主要成果:
- 基于THF的LHCE显示出强烈的溶解和快速的界面脱动力.
- 这导致无形,有机丰富的SEI有效抑制树突.
- 在-30°C达到高库伦比效率 (∼99.63%).
结论:
- 界面除动力学对于调节SEI形成和抑制低温LMB中的树突至关重要.
- 基于THF的LHCE为稳定的低温LMB运行提供了有前途的策略.
- 为先进的电池设计提供了对电解质化学的基本见解.
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