一种具有螺旋交联网络的新型凝结合剂,用于离子电池中的高性能Si阳极
Xuejian Zeng1, Shiyuan Dai1,2, Fei Huang1
1Nanotechnology Research Institute, Jiaxing University, Jiaxing, 314001, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|July 20, 2024
概括
一种具有螺旋交联网络结构的新凝粘合剂有效地管理离子电池中的阳极体积膨胀,增强循环稳定性和性能.
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
- 聚合物化学 聚合物化学
背景情况:
- (Si) 阳极为离子电池提供了高的理论容量.
- 循环过程中Si的显著体积膨胀导致结构完整性差,循环寿命短.
- 结合器设计对于适应Si体积变化和确保电池性能至关重要.
研究的目的:
- 开发一种用于阳极的新型粘合剂,以减轻体积扩张的挑战.
- 为了研究螺旋式交联网络结构对粘合剂性能的影响.
- 通过部分碳化来提高粘合剂的导电性和稳定性.
主要方法:
- 凝的酶交联形成一个网络结构.
- 在霍夫迈斯特盐溶液中浸泡,以诱导螺旋状的二次结构.
- 低温热解法用于凝粘合剂的部分碳化.
- 使用优化粘合剂的阳极的制造和电化学测试.
主要成果:
- 螺旋式交叉连接网络结构有效地消除了Si扩张带来的压力和应变.
- 部分碳化凝粘合剂显示出更好的导电性和稳定性.
- 带有优化的粘合剂的阳极表现出高的初始库伦比效率.
- 对于Si阳极来说,实现了卓越的速率性能和长期循环稳定性.
结论:
- 控制粘合剂分子配置是一种创新的方法,可以提高Si阳极循环稳定性.
- 开发的凝粘合剂成功解决了阳极中体积膨胀的问题.
- 这种结合剂策略适用于其他具有大量体积变化的高容量阳极材料.
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