可自由旋转的多牙分子使离子电池的自适应水性粘合剂成为可能
Zefen Wang1, Mei Yang1, Yijiang Liu1
1Key laboratory of Enviromentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, 411105, China.
Angewandte Chemie (International ed. in English)
|August 19, 2025
概括
研究人员开发了一种新型的自适应性水性粘合剂,使用多牙分子定策略. 这种粘合剂增强了先进离子电池的基阳极的结构完整性和电化学性能.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 离子电池中的阳极在循环过程中遭受严重的体积变化,限制了它们的实际应用.
- 开发稳定和高性能结合剂对于减轻这些体积变化和改善电池寿命至关重要.
研究的目的:
- 为基阳极设计和合成一种新型的自适应性水性粘合剂.
- 调查多牙分子定策略在结合剂开发中的有效性.
- 为了提高离子电池中阳极的结构和界面稳定性.
主要方法:
- 一个多牙分子 (2,2-bis ((hydroxymethyl) 黄油酸,BHB) 通过动态介导自组装与聚烯酸 (PAA) 交叉连接.
- 制造具有高质量负载的高强度Si/C阳极.
- 对NCM811/Si/C全细胞进行测试,以评估电化学性能和可循环性.
主要成果:
- 这种新型的水性粘合剂形成了强大的3D动态网络,使得高强度Si/C阳极成为可能.
- 在13毫克的高质量负载下,达到6.13 mAh cm-2的高面积容量.
- 由于增强的结构和界面稳定性,在全细胞中表现出卓越的循环性和电化学性能.
结论:
- 多牙分子定策略对于开发自适应性水性结合剂是有效的.
- 动态和可逆的粘附特性有助于提高电池性能.
- 这种方法为设计超高能基离子电池的粘合剂提供了一条途径.
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