操纵全固态硫电池的混合排放产品,以改善循环寿命
Jung Tae Kim1, Adwitiya Rao2, Heng-Yong Nie3,4
1Department of Mechanical and Materials Engineering, University of Western Ontario, 1151 Richmond St, London, Ontario, ON, N6A 3K7, Canada.
Nature communications
|October 12, 2023
概括
所有固态硫电池都是固态硫电池.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 全固态硫电池承诺高能量密度和安全性.
- 了解排放产品对于性能至关重要.
- 目前对排放产品的知识还不够.
研究的目的:
- 为了阐明完全固态硫电池中排放产品的组成.
- 根据放电产品的洞察力,制定提高电池性能的战略.
主要方法:
- 射线吸收光谱学 (XAS) 是一种X射线吸收光谱技术.
- 飞行时间二次离子质谱 (ToF-SIMS)
- 使用Li-In合金负电极进行电化学循环.
主要成果:
- 排放产品是硫化 (Li2S) 和二硫化 (Li2S2) 的混合物,而不仅仅是Li2S.
- 涉及潜在操纵和LiI催化物的综合策略提高了性能.
- 电池在1500个周期内实现了979.6 mAh g-1可逆容量.
结论:
- 准确识别放电产品是优化电池设计的关键.
- 拟议的战略提高了全固态硫电池的稳定性和容量.
- 这项工作为推进下一代固态电池技术提供了途径.
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