Gel Polymer Electrolytes Based on Polyvinyl Alcohol for Zinc-Ion Hybrid Supercapacitors

被引：0
|
作者：
Zuo D. [1 ,2 ]
Wang J. [1 ]
Yang H. [1 ]
Xu J. [1 ]
Zhang H. [1 ]
机构：
[1] College of Materials Science and Engineering, Wuhan Textile University, Wuhan
[2] Hubei Engineering Research Center of Industrial Detonator Intelligent Assembly, Wuhan Textile University, Wuhan
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2024年 / 40卷 / 02期
关键词：
gel polymer electrolyte; polyvinyl alcohol; zinc-ion hybrid supercapacitor;
D O I：
10.16865/j.cnki.1000-7555.2024.0025
中图分类号：
学科分类号：
摘要：
Zinc ion hybrid capacitors (ZIHCs) are a competitive alternative for the next generation of energy storage devices. They combine the high energy density of batteries and high power density of capacitors. However, the ZIHCs with battery-type cathode and capacitor-type anode mostly use electrolyte solutions, which are prone to leakage and lead to safety risks. To address this issue, this paper presented a strategy for gel polymer electrolytes (GPE) with honeycomb- like three- dimensional network morphology, which was prepared from cellulose, hydroxyethylcellulose and polyvinyl alcohol via freeze-thawing and following electrolyte absorption method. The optimized GPE not only exhibits good mechanical properties (tensile strength of 0.24 MPa, elongation at break of 289%), but also shows a high ionic conductivity (58.5 mS/cm). A ZIHC composed of GPE, manganese dioxide cathode, and activated carbon cathode achieves a specific capacitance of 31.5 F/g and an energy density of 15.0 Wh/kg. Furthermore, it maintains a specific capacitance of ~80% even after 1.5×104 charge/discharge cycles at 2 A/g, demonstrating promising potential application of GPE in the field of ZIHC. The usage of environmentally friendly raw materials and facile preparation method also provide a new insight for GPE investigation in applications of energy storage and flexible wearable electronics. © 2024 Sichuan University. All rights reserved.
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页码：157 / 163
页数：6
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