近日，课题组在支链淀粉增粘水凝胶（https://onlinelibrary.wiley.com/doi/10.1002/adfm.202108

423）研究基础上，开发出新型黏附水凝胶电解质，可为解决储能器件中的电解质-电极界面问题提供新思路。

该水凝胶电解质以化学交联聚丙烯酰胺（PAM）为基础网络，支链淀粉（Amy）在其中形成半互穿结构。支链淀粉的分支结构与极性基团赋予水凝胶电解质高界面黏附性，高浓度氯化锌帮助提升环境适应性。双重设计共同构建稳固的电解质-电极界面，降低界面阻抗。

基于此电解质的 ZHSCs 表现优异，循环稳定性超 32000 次，容量保持率达 81%，在形变状态和零下环境中仍稳定工作，为恶劣条件下储能器件性能提升提供新思路。

论文题目：Sustainable biomass enabled adhesive hydrogel electrolytes for highly stable and bendable zinc-ion hybrid supercapacitors

论文链接：https://www.sciencedirect.com/science/article/abs/pii/S1385894725102167

论文摘要：Zinc-ion hybrid supercapacitors (ZHSCs) containing hydrogel electrolytes exhibit superior advantages to most energy storage devices, but weak electrolyte-electrode interface and poor environmental adaptability of hydrogel electrolytes often limit the electrochemical performances of supercapacitors under specific conditions. Inspired by sustainable and highly sticky nature of crops containing rich amylopectin (Amy), molecular engineering of adhesive hydrogel electrolytes containing chemically cross-linked polyacrylamide (PAM) network semi-interpenetrated by Amy is proposed to address the above issues. Because of the branched molecular structure and abundant polar groups, Amy endows the hydrogel electrolytes with high adhesiveness, and high-concentration ZnCl2 is introduced to make the hydrogel electrolytes excellent environmental adaptability. Well-constructed hydrogel electrolytes provide a robust electrolyte-electrode interface and lowered interfacial impedance. Consequently, high charge/discharge stability (>32,000 cycles) and capacity retention (81 % after 32,000 cycles) have been achieved. Moreover, such ZHSCs also exhibit outstanding cycling stability in deformed states and subzero conditions. Bio-inspired adhesive hydrogel electrolytes herein are expected to provide a promising strategy for promoting the electrochemical performances of energy storage devices in harsh conditions.