Mechanical reliable,NIR light-induced rapid self-healing hydrogel electrolyte towards flexible zinc-ion hybrid supercapacitors with low-temperature adaptability and long service life

作     者：Tengjia Gao Na Li Yang Yang Jing Li Peng Ji Yunlong Zhou Jianxiong Xu 

作者机构：School of Materials and Advanced ManufacturingHunan Key Laboratory of Electrochemical Green Metallurgy TechnologyHunan University of TechnologyZhuzhou 412007HunanChina School of Life Sciences and ChemistryHunan Key Laboratory of Biomedical Nanomaterials and DevicesHunan University of TechnologyZhuzhou 412007HunanChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2024年第92卷第5期

页      面：63-73页

核心收录：

学科分类：0820[工学-石油与天然气工程] 080801[工学-电机与电器] 081704[工学-应用化学] 0808[工学-电气工程] 07[理学] 0817[工学-化学工程与技术] 08[工学] 070304[理学-物理化学(含∶化学物理)] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(52174247 and 22302066) “Hejian”Innovative Talent Project of Hunan Province(No.2022RC1088) the Hunan Provincial Natural Science Foundation(2023JJ40255) the Scientific Research Foundation of Hunan Provincial Education(22B0599 and 23A0442) 

主　　题：Flexible zinc ion supercapacitor Hydrogel electrolyte Self-healing Anti-freezing 

摘      要：Hydrogel electrolytes hold great potential in flexible zinc ion supercapacitors(ZICs)due to their high conductivity,good safety,and ***,freezing of electrolytes at low temperature(subzero)leads to drastic reduction in ionic conductivity and mechanical properties that deteriorates the performance of flexible ***,the mechanical fracture during arbitrary deformations significantly prunes out the lifespan of the flexible ***,a Zn^(2+)and Li^(+)co-doped,polypyrrole-dopamine decorated Sb_(2)S_(3)incorporated,and polyvinyl alcohol/poly(N-(2-hydroxyethyl)acrylamide)double-network hydrogel electrolyte is constructed with favorable mechanical reliability,anti-freezing,and self-healing *** addition,it delivers ultra-high ionic conductivity of 8.6 and 3.7 S m^(-1)at 20 and−30°C,respectively,and displays excellent mechanical properties to withstand tensile stress of 1.85 MPa with tensile elongation of 760%,together with fracture energy of 5.14 MJ m^(-3).Notably,the fractured hydrogel electrolyte can recover itself after only 90 s of infrared illumination,while regaining 83%of its tensile strain and almost 100%of its ionic conductivity during−30–60°***,ZICs coupled with this hydrogel electrolyte not only show a wide voltage window(up to 2 V),but also provide high energy density of 230 Wh kg^(-1)at power density of 500 W kg^(-1)with a capacity retention of 86.7%after 20,000 cycles under 20°***,the ZICs are able to retain excellent capacity even under various mechanical deformation at−30°*** contribution will open up new insights into design of advanced wearable flexible electronics with environmental adaptability and long-life span.