改进了对纳离子电池的阳极和阴极的接口构造,使用含有双添加剂的超低度电解质
Yilong Lin1, Xiaojing Jin1, Shuqing Gao1
1College of Light Chemical Industry and Materials Engineering, Shunde Polytechnic, Foshan, 528333, China.
Chemistry (Weinheim an der Bergstrasse, Germany)
|January 11, 2024
概括
两种添加剂,二二 (NaDFOB) 和三三甲 (TMSB),显著提高了离子电池的循环稳定性. 这通过构建保护性接口膜来改善超低度电解质的容量保留.
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:
- 离子电池 (SIB) 为离子电池提供了经济高效的替代品.
- 超低盐电解质 (0.3 M NaPF6) 降低成本,但导致缺陷接口和不良循环.
- 由溶剂分解产生的有机主导的接口阻碍了长期的SIB性能.
研究的目的:
- 为了提高SIB的循环性能,使用超低度电解质.
- 为了研究双重添加剂NaDFOB和TMSB对接口特性的影响.
- 在阳极和阴极上构建稳定的接口膜.
主要方法:
- 使用双添加剂的硬碳/NaNi1/3Fe1/3Mn1/3O2电池的电化学测试.
- 使用二二氧化 (NaDFOB) 和三三甲基 (TMSB) 作为添加剂.
- 结合理论计算和实验技术来分析接口机制.
主要成果:
- 双重添加剂 (NaDFOB和TMSB) 显著改善了循环稳定性.
- 在200个周期后,容量保留从17% (基线) 增加到79% (NaDFOB) 和83% (NaDFOB和TMSB).
- 在超低度电解质中的电极上构建了有效的接口膜.
结论:
- 双重添加剂有效提高SIB循环性能在超低度电解质中.
- 稳定的接口薄膜的构建对于提高电化学稳定性至关重要.
- 这种方法为开发具有成本效益和高性能的SIB提供了一个有前途的战略.
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