揭示金属电池对固体电解质相间形成的溶剂效应
Shiyang Wang1,2, Suting Weng3, Xinpeng Li1
1Hefei National Laboratory for Physical Science at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China.
Angewandte Chemie (International ed. in English)
|October 27, 2023
概括
电解质对于金属电池 (SMB) 是至关重要的. 不同的以太链长度显著影响固体电解质间相形成和电池性能,1,2-二二氧乙显示出极好的稳定性.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 基于以太的电解质与金属电池 (SMB) 的金属阳极 (SMA) 具有卓越的兼容性.
- 对于以太溶剂的精确选择原理及其对固体电解质间相 (SEI) 形成的影响仍然不太清楚.
- 了解这些因素对于推进中小企业技术至关重要.
研究的目的:
- 系统地研究以太溶剂结构与中小企业相间特性之间的关系.
- 阐明线性以太溶剂的终端组长如何影响SMA上的溶解结构和SEI形成.
- 为了将电解质特性与中小企业的电化学性能和沉积形态相关联.
主要方法:
- 系统地比较不同终端组长度的链式以太基电解质.
- 计算计算分析电解质溶解结构.
- 综合性表征,包括冷电子显微镜 (Cryo-EM),以研究SEI形成.
- 金属电池的电化学性能测试和Na3V2(PO4) 3全电池.
主要成果:
- 具有不同终端组长度的线性以太溶剂分子对SMA表现出明显的溶解效应.
- 终端组长度关键调节电解质溶解结构和界面反应机制.
- 低温电磁探测揭示了SEI形态在各种以太基电解质的显著差异.
- 基于1,2-二氧化乙的电解质实现了高库伦比效率的99.9%.
结论:
- 以太溶剂的终端组长是控制中小企业SEI特性和电化学性能的一个关键因素.
- 基于1,2-二氧化乙的电解质有助于稳定的沉积,并使Na3V2(PO4)3全细胞的长期循环.
- 这项研究为高性能金属电池的以太溶剂选择提供了关键的见解.
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