Coupling of Adhesion and Anti‑Freezing Properties in Hydrogel Electrolytes for Low‑Temperature Aqueous‑Based Hybrid Capacitors  

作　　者：Jingya Nan Yue Sun Fusheng Yang Yijing Zhang Yuxi Li Zihao Wang Chuchu Wang Dingkun Wang Fuxiang Chu Chunpeng Wang Tianyu Zhu Jianchun Jiang 

机构地区：[1]Institute of Chemical Industry of Forest Products,Chinese Academy of Forestry,Key Laboratory of Biomass Energy and Material,Jiangsu Province,Nanjing 210042,Jiangsu,People’s Republic of China [2]Co‑Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University,Nanjing 210037,Jiangsu,People’s Republic of China [3]Energy Technologies Area,Lawrence Berkeley National Laboratory,Berkeley,CA 94720,USA [4]Department of Materials Science and Engineering,Clemson University,Clemson,SC 29634,USA

出　　处：《Nano-Micro Letters》2024年第2期15-31,共17页纳微快报（英文版）

基　　金：This work was supported by the Natural Science Foundation of Jiangsu Province(BK20220213);the Fundamental Research Funds of Jiangsu Key Laboratory of Biomass Energy and Material(JSBEM-S-202210 and JSBEM-S-202102).

摘　　要：Solid-state zinc-ion capacitors are emerging as promising candidates for large-scale energy storage owing to improved safety,mechanical and thermal stability and easy-to-direct stacking.Hydrogel electrolytes are appealing solid-state electrolytes because of eco-friendliness,high conductivity and intrinsic flexibility.However,the electrolyte/electrode interfacial contact and anti-freezing properties of current hydrogel electrolytes are still challenging for practical applications of zinc-ion capacitors.Here,we report a class of hydrogel electrolytes that couple high interfacial adhesion and anti-freezing performance.The synergy of tough hydrogel matrix and chemical anchorage enables a well-adhered interface between hydrogel electrolyte and electrode.Meanwhile,the cooperative solvation of ZnCl2 and LiCl hybrid salts renders the hydrogel electrolyte high ionic conductivity and mechanical elasticity simultaneously at low temperatures.More significantly,the Zn||carbon nanotubes hybrid capacitor based on this hydrogel electrolyte exhibits low-temperature capacitive performance,delivering high-energy density of 39 Wh kg^(-1)at-60°C with capacity retention of 98.7%over 10,000 cycles.With the benefits of the well-adhered electrolyte/electrode interface and the anti-freezing hydrogel electrolyte,the Zn/Li hybrid capacitor is able to accommodate dynamic deformations and function well under 1000 tension cycles even at-60°C.This work provides a powerful strategy for enabling stable operation of low-temperature zinc-ion capacitors.

关 键 词：Interfacial adhesion ANTI-FREEZING Hydrogel electrolytes Low-temperature hybrid capacitors Dynamic deformati 

分 类 号：TM53[电气工程—电器] O646.1[理学—物理化学] TQ427.26[理学—化学]