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合理选的素分子作为高温离子电池的电解质添加剂

Yanan Sun¹, Cheng Zheng¹, Qian Yao¹

¹Shandong University, School of chemistry and chemical engineering, CHINA.

Angewandte Chemie (International ed. in English)

|February 27, 2025

概括

八甲基三素 (MDM) 通过稳定电极,在高温下提高离子电池的性能. 这种素添加剂提高了循环稳定性和容量,为储能应用提供了有前途的解决方案.

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) 对于大规模储能至关重要,但在高温性能方面存在困难.
高温加速副作用和电极溶解,在循环过程中降解SIB.
优化电解质配方是克服这些高温挑战的关键.

研究的目的:

选素分子作为电解质添加剂,以提高在高温下SIB阳极性能.
调查甲基三素 (MDM) 增强高温稳定性的机制.
用不同的阳极材料 (Sn,Bi,硬碳) 评估MDM的有效性.

主要方法:

选各种西洛分子以确定有效的电解质添加剂.
用Sn微粒在60°C的SIB的电化学测试,包括循环性能和容量保持.
分析电解质和相间化学,以了解MDM的稳定机制.

主要成果:

八甲基三素 (MDM) 被确定为一种优质的添加剂,促进离子相互作用和富含NaF的相间形成.
MDM显著抑制了PF的解,减少了电解质中的有害物种.
使用MDM,Sn微粒子阳极在60°C下经过750个循环 (2Ag-1) 后显示出752mAhg-1的可逆容量,表现优于对照组.

结论:

MDM有效地提高了SIB阳极的高温性能和循环稳定性.
该机制涉及偏好的离子相互作用和抑制电解质分解.
在高温SIB应用中,MDM显示为各种阳极材料的多功能添加剂.

关键词:

电解质添加剂电解质添加剂阳极材料是一种阳极材料.高温的高温的高温的高温这就是所谓的siloxane.离子电池离子电池

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