电解质
超级电容器
材料科学
明胶
电容
离子电导率
自愈水凝胶
化学工程
极限抗拉强度
聚丙烯酰胺
原位聚合
电化学
电容器
电导率
复合材料
聚合
电极
高分子化学
化学
电压
聚合物
有机化学
电气工程
工程类
物理化学
作者
Shaojie Kuang,Zixuan Huang,Yaoliang Huang,Dan Shao,Xinying Jia,Baiyi Feng,Yun Yan,Hang Hu,Xiaoyuan Yu
标识
DOI:10.1016/j.jallcom.2022.165688
摘要
A biomass hydrogel electrolyte with double cross-linked structure was successfully fabricated by in situ polymerization and cross-linking reaction using polyacrylamide (PAAm) as the main network and gelatin as the reinforced network. This as-prepared gelatin/PAAm hydrogel electrolyte exhibits excellent mechanical strength (compressive, tensile strain and stress of GP-10 can reach 80 %, 1700 % and 10.4 MPa respectively) and high ionic conductivity. Flexible supercapacitors (FSCs) based on the gelatin/PAAm hydrogel electrolytes deliver a high specific capacitance of 140 F g−1 and excellent energy density of 49.8 Wh kg−1. More importantly, the FSCs not only achieve a long life of 50,000 cycles in a stable environment but also deliver high specific capacitance and good cycle performance when cycled at different folded angles. The constructed zinc ion capacitors (ZICs) applied with the gelatin/PAAm hydrogel electrolytes can achieve capacity retention of 98.0 % after 10,000 cycles at a high current density of 1 A g−1. These results demonstrate that the biomass hydrogel electrolytes exhibit excellent electrochemical performance and durability in flexible energy storage devices.
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