在运行中,拉曼光谱学揭示了金属电池中的离子溶解
Dequan Huang1,2, Cuihong Zeng1, Menghao Liu1
1Guangxi Key Laboratory of Low Carbon Energy Materials, Guangxi Scientific and Technological Achievements Transformation Pilot Research Base of Electrochemical Energy Materials and Devices, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|January 31, 2025
概括
一种新的性Ag-Cu网状电流采集器和以太基电解质提高了金属电池的性能. 这种设计促进了统一的沉积,延长了循环寿命,并提高了先进能源存储的安全性.
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:
- 金属电池 (LMB) 的短周期寿命和安全问题源于不均的沉积和不稳定的固体电解质介面.
- 基于以太的电解质在LMB中很常见,但离子协调和溶剂相互作用需要更深入的理解.
研究的目的:
- 开发一个3D结构化的电流收集器和新型电解质系统,以应对LMB的挑战.
- 为了研究性Ag-Cu网状电流采集器和二甲基乙/二氧化电解质对离子溶解和沉积的影响.
主要方法:
- 作为3D结构电流采集器,设计和实现性Ag-Cu网格.
- 使用二甲氧乙 (DME) 和二氧化 (DOL) 作为以太基电解质中的复杂溶剂.
- 在操作中使用拉曼光谱来分析接口上的离子溶解结构.
主要成果:
- Ag-Cu网格促进了快速的离子流和均的核化.
- 在运行中的拉曼光谱学揭示了Li +与 bis ((trifluoromethylsulfonyl) imide (TFSI-) 和DME相比DOL的优先协调.
- 在200个循环中,Ag-Cu网格/Li对称电池实现了1200小时的循环寿命和98.6%的库伦比效率.
- 在500个循环后,Ag-Cu网格/Li的LiNi0.8Co0.1Mn0.1O2电池显示了208.7 mAh g-1的初始放电容量,保持76.1%.
结论:
- 性3D Ag-Cu网格有效调节Li+溶解/解溶,从而导致均的沉积.
- 结合Ag-Cu网格和DME/DOL电解质的系统显著提高了金属电池的循环寿命和稳定性.
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