在硫烯溶剂中定制终端组,以提高与金属阳极的兼容性
Jinmin Wang1, Shuang Wei2,3, Mingming Fang2
1School of Petrochemical Engineering, Changzhou University Changzhou 213164 China.
Chemical science
|January 15, 2026
概括
研究人员开发了一种新的电解质,N,N-二甲基硫胺化物 (DMSF),用于金属电池 (LMB). 这种DMSF电解质通过在金属上形成保护性介相来增强循环稳定性和能量密度.
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:
- 基于硫的化合物具有很高的介电常数和稳定性,但与金属的兼容性不佳,导致树突的生长.
- 金属电池 (LMB) 现有的电解质因与金属发生反应而面临界面不稳定性和有限循环寿命的挑战.
- 开发稳定和高性能电解质对于推进下一代储能解决方案至关重要.
研究的目的:
- 设计和合成一种基于硫的新型电解质N,N-二甲基硫胺化物 (DMSF),以提高金属电池的性能.
- 研究LMB中的DMSF的界面化学和离子运输特性.
- 评估使用DMSF电解质的LMB的电化学性能,包括循环稳定性,速率能力和能量密度.
主要方法:
- 用N,N-二甲基末端组组合的硫烯基核心的功能化,以创建DMSF.
- 电化学表征包括静电循环,速率能力测试和长期稳定性评估.
- 分析固体电解质间相 (SEI) 组成,使用技术确认LiF/Li2S混合层的形成.
主要成果:
- DMSF电解质在Li‖LiNi0.8Co0.1Mn0.1O2细胞中显著提高了循环稳定性,在850个循环后保持了80%的容量.
- 电池表现出稳定的5C快速充电和从-50°C到60°C的广泛工作温度范围.
- 使用DMSF的5Ah袋式电池实现了540Wh kg-1的能量密度,在110个循环中保持高稳定性.
结论:
- 硫基电解质的终端组修改是提高金属电池性能的一种可行的策略.
- DMSF电解质通过形成一种保护性LiF/Li2S混合SEI,有效地抑制了界面的副作用和树的生长.
- 这项工作为开发先进的硫基电解质为高能量密度和持久的金属电池铺平了道路.
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