设计/铁化异质连接作为液态和全固态离子电池阳极,显示出卓越的性能
Yajun Zhu1, Kehao Tao2, Yunmiao Fan3
1Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|February 9, 2026
概括
一个新的Si@FeSe@C阳极设计克服了离子电池中的阳极挑战. 这种异质连接结构增强了稳定性和离子传输,从而提高了电池的性能和寿命.
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:
- 阳极为离子电池提供高容量,但受到体积膨胀和差的界面稳定性的影响.
- 阳极上的常规涂层具有有限的粘附性,导致性能降低和低效的离子/电子传输.
研究的目的:
- 开发一种稳定高效的阳极,用于离子电池,使用异质连接策略.
- 为了增强离子和电子运输,同时减轻阳极的体积膨胀问题.
主要方法:
- 制造具有强大的Fe-Se-Si粘合和碳涂层的Si@FeSe@C异质连接阳极.
- 用液态和固态电解质在全电池中对阳极性能进行电化学测试.
- 现场X射线衍射,现场拉曼光谱和密度函数理论 (DFT) 计算来分析结构和电化学性质.
主要成果:
- 在0.2 A g-1.1的100个循环后,Si@FeSe@C阳极实现了1092.8 mAh g-1的容量.
- 在1.0 A g-1.1的500个周期中保持超过99.6%的库伦比效率.
- 在液态和全固态全电池中表现出卓越的循环性能,DFT证实了降低Li+扩散能量障碍.
结论:
- 在Si@FeSe@C阳极中的异质连接设计显著提高了结构稳定性和电化学性能.
- 这种方法为开发高性能二次电池系统提供了可行的策略.
- 强大的接口粘合和高效的运输特性是提高电池寿命和容量的关键.
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