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在硬碳阳极上构建连续分布和晶体NaF丰富的SEI,通过高性能离子电池的粘合剂化学

Mingquan Liu^1,2, Junming Cai^1,2, Yinze Zuo^1,2

¹College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, P. R. China.

Advanced materials (Deerfield Beach, Fla.)

|August 5, 2025

概括

一种新的粘合剂策略使得在硬碳阳极上形成一个连续分布的和结晶的富含化的固体电解质接口 (CC-NaF-SEI). 这一突破显著提高了离子电池的性能和稳定性.

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
储能储能储能储能储能储能

背景情况:

硬碳 (HC) 阳极对于离子电池至关重要,但它们的性能受到固体电解质接口 (SEI) 的限制.
实现持续分布和结晶的富含NaF的SEI (CC-NaF-SEI) 是非常理想的,但在技术上具有挑战性,并且缺乏成本有效的方法.

研究的目的:

开发一个具有成本效益的策略,用于在HC阳极上设计CC-NaF-SEI.
研究粘合剂化学在调节SEI形成和性质中的作用.
为了提高储存性能和HC阳极的循环稳定性.

主要方法:

使用商用LA133粘合剂用于CC-NaF-SEI工程.
对具有不同功能组的结合剂进行了比较分析,以了解SEI监管机制.
研究了LA133的双调节机制,涉及离子协调和催化P-F键裂解.
分析了键在为SEI生长创造受限微环境中的作用.

主要成果:

通过双重监管机制,LA133绑定器有效地促进了CC-NaF-SEI的形成.
设计的SEI表现出增强的离子分解动力学和持续的NaF增长.
优化的HC阳极表现出超高的初始库伦比克效率 (95.9%) 和可逆容量 (356.6 mAh g-1).
在广泛的温度范围 (-20-60°C) 中实现了特殊的循环稳定性.

结论:

粘合剂化学在调整SEI属性以提高电池性能方面发挥着关键作用.
LA133绑定器为构建CC-NaF-SEI提供了一种新且有效的策略.
这项工作为离子电池的界面优化建立了新的范式,为先进的储能解决方案铺平了道路.

关键词:

离子分解的离子分解粘合剂粘合剂粘合剂连续分布的连续分布的结晶的NaF丰富的SEI.硬碳是一种硬的碳.

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