在金属电池中解开烯氧化物形成
Daniel Stottmeister1, Leonie Wildersinn2, Julia Maibach2,3
1Institute of Theoretical Chemistry, Ulm University, 89069, Ulm, Germany.
ChemSusChem
|October 11, 2023
概括
研究人员研究了电池电解质反应. 将甲酸盐添加到烯碳酸盐中,意外形成了氧化物,揭示了对电池稳定性至关重要的新的SEI形成途径.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
背景情况:
- 基于的电池对储能充满希望,但面临着寄生性副作用反应和不稳定的固体电解质界面 (SEI) 的挑战.
- 电解质在SEI形成中的作用至关重要,但确切的机制,特别是关于SEI组件的溶解性,仍然不清楚.
研究的目的:
- 阐明在碳酸电解质中的金属上的初始固体电解质介相 (SEI) 形成机制.
- 调查甲对SEI形成的影响,并确定氧化物生成的来源.
主要方法:
- 结合实验技术:X射线光电子谱学和气体染色学.
- 使用密度函数理论进行理论计算.
- 研究金属浸入碳酸和没有甲.
主要成果:
- 在将甲酸盐添加到电解质后,发现了氧化物的突然出现.
- 发现化层的形成是通过碳酸前体的环闭反应生成氧化的关键.
- 解开了电解质分解途径的变化,并提出了一种反应机制.
结论:
- 化层的形成显著影响电池中的SEI组成和电解质分解.
- 已经确定了导致氧化物形成的特定反应途径,为SEI的不稳定性提供了洞察力.
- 了解这些机制对于开发更稳定,更有效的基于的储能系统至关重要.
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