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接口H键使灵活离子电池的耐疲劳凝电解质成为可能
Jingjing Yuan1,2,3, Yezhou Shen1, Yifan Li1
1Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.
ACS applied materials & interfaces
|December 23, 2025
概括
灵活的离子电池 (ZIB) 面临着电极-电解质粘附的挑战. 一种新型的循环德克斯改性凝电解质增强了机械应力下的稳定性和性能,使可穿戴设备可靠地储存能量.
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
- 聚合物科学 聚合物科学
背景情况:
- 灵活的离子电池 (ZIB) 由于电极和电解质之间的接口粘附性差,阻碍了离子传输和机械应力下的稳定性.
- 现有的凝电解质经常因动态变形时的滑动而与电极分离,从而损害了电池的性能.
- 开发强大的接口对于推进灵活的储能设备至关重要.
研究的目的:
- 开发一种耐疲劳的双网凝电解质,用于具有增强界面粘附性的柔性ZIB.
- 研究宿主-客人相互作用和键在提高机械稳定性和离子导电性方面的作用.
- 为了证明ZIBs的电化学性能和耐用性,使用了新的凝电解质.
主要方法:
- 制造一个循环德克斯特林 (CD) 修改的多烯胺/碳甲基纤维素 (PAM/CMC) 双网凝电解质.
- 界面属性的表征,包括承载能力和伸展性.
- 测量离子导电性,Zn2+转移数和Zn2+溶解结构.
- 在循环和变形下对对称Zn和Zn的电池进行电化学测试.
主要成果:
- 该PAM/CMC/CD凝电解质表现出优异的界面承载能力 (11N),高伸展性 (162%),以及折叠后的结构完整性.
- 获得了32.01mS cm-1的高离子导电率和0.9062.2的Zn2+转移数.
- 通过调节的 Zn2+ 溶解和偏好的沉积,证明抑制了 Zn 树突的生长,并改善了界面稳定性.
- 组装的Zn下载MnO2对称电池在1200小时后显示1.8%的容量衰变,Zn下载MnO2全电池在120个循环后保留了275 mAh g-1.
结论:
- 开发的CD修改的双网络凝电解质有效地解决了接口滑动,并提高了柔性ZIB的机械耐力.
- 该材料具有卓越的离子导电性和电化学稳定性,对于可靠的灵活能量存储至关重要.
- 这项工作为开发可穿戴电子产品的耐用和高性能灵活ZIB提供了有希望的解决方案.
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