Li Pengzhou, Liao Meng, Cui Shuquan, Li Jiaxin, Ye Lei, Yang Yibei, Wang Chuang, Wang Bingjie, Peng Huisheng
State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Laboratory of Advanced Materials, Fudan University, Shanghai, 200438, P. R. China.
Angew Chem Int Ed Engl. 2023 Apr 17;62(17):e202300705. doi: 10.1002/anie.202300705. Epub 2023 Mar 15.
Flexible batteries based on gel electrolytes with high safety are promising power solutions for wearable electronics but suffer from vulnerable electrode-electrolyte interfaces especially upon complex deformations, leading to irreversible capacity loss or even battery collapse. Here, a supramolecular sol-gel transition electrolyte (SGTE) that can dynamically accommodate deformations and repair electrode-electrolyte interfaces through its controllable rewetting at low temperatures is designed. Mediated by the micellization of polypropylene oxide blocks in Pluronic and host-guest interactions between α-cyclodextrin (α-CD) and polyethylene oxide blocks, the high ionic conductivity and compatibility with various salts of SGTE afford resettable electrode-electrolyte interfaces and thus constructions of a series of highly durable, flexible aqueous zinc batteries. The design of this novel gel electrolyte provides new insights for the development of flexible batteries.
基于具有高安全性的凝胶电解质的柔性电池是可穿戴电子产品很有前景的电源解决方案，但存在脆弱的电极-电解质界面问题，尤其是在复杂变形时，会导致不可逆的容量损失甚至电池崩溃。在此，设计了一种超分子溶胶-凝胶转变电解质（SGTE），它可以通过在低温下可控的再润湿来动态适应变形并修复电极-电解质界面。在普朗尼克中聚环氧丙烷嵌段的胶束化以及α-环糊精（α-CD）与聚环氧乙烷嵌段之间的主客体相互作用的介导下，SGTE的高离子电导率和与各种盐的兼容性提供了可重置的电极-电解质界面，从而构建了一系列高度耐用的柔性水系锌电池。这种新型凝胶电解质的设计为柔性电池的发展提供了新的见解。
