摘要
超级电容器的韧性、自修复和高比电容对于柔性和可穿戴电子设备具有重要的实用价值.为此,我们制备了一种新型的聚乙烯醇-海藻酸钠-铁氰化钾-硫酸钠多功能凝胶聚合物电解质.其中铁氰化钾起到了三角色作用,包括载流子供体、离子交联剂和氧化还原活性剂,有效地缓解了凝胶聚合物电解质通常存在的电导率与机械性能间的矛盾.此外,由于铁氰化钾的氧化还原反应提供了赝电容,组装的超级电容器具有很高的电极比电容和能量密度.该超级电容器还表现出优异的弯曲、拉伸、自修复和抗冻能力.因而,制备的凝胶聚合物电解质和超级电容器在复杂使用条件下的柔性和可穿戴电子设备中具有广阔的应用前景.
ABSTRACT Supercapacitors exhibiting toughness,selfhealing,and high specific capacitance have practical significance for use in flexible and wearable electronic equipment.To meet these requirements,a novel multifunctional gel polymer electrolyte(GPE)consisting of polyvinyl alcohol(PVA)-sodium alginate(SA)-K_(3)[Fe(CN)]_(6)-Na_(2)SO_(4)was prepared.In this GPE,K_(3)[Fe(CN)]_(6)plays three crucial roles by serving as a carrier donor,ionic crosslinking agent and redoxactive mediator.Consequently,the usual conflict between the conductivity and mechanical properties of GPEs is alleviated to some extent.In addition,the electrode specific capacitance and the energy density of the assembled supercapacitor are obviously improved because of the pseudocapacitance generated from the redox reaction of K_(3)[Fe(CN)]_(6).Based on this GPE,the supercapacitor exhibits outstanding bending and stretching stabilities,significant self-healing,and anti-freezing properties.Therefore,the prepared GPE and supercapacitor are promising for application in flexible and wearable electronic equipment with complex service conditions.
作者
杨佳
王梦晓
陈涛
于翔
秦刚
方潇焓
苏晓翔
陈强
Jia Yang;Mengxiao Wang;Tao Chen;Xiang Yu;Gang Qin;Xiaohan Fang;Xiaoxiang Su;Qiang Chen(Henan Key Laboratory of Materials on Deep-Earth Engineering,Henan Polytechnic University,Jiaozuo 454003,China;College of Materials Engineering,Henan University of Engineering,Zhengzhou 451191,China;School of Materials Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,China;School of Materials Science and Engineering,Tongji University,Shanghai 200092,China;Do-Fluoride New Materials Co.,Ltd.,Jiaozuo 454191,China;Wenzhou Institute,University of Chinese Academy of Sciences,Wenzhou 352001,China)
基金
supported by the Science Foundation for Excellent Youth of Henan Province(202300410166)
the Science and Technology Project of Henan Province(212102210201 and 212102310015)
China Postdoctoral Science Foundation(2020M672179)
the Key Project of Science and Technology Research of Henan Provincial Department of Education(21A430017)
the Training Program for Young Backbone Teachers in the University of Henan Province(2020GGJS052)
the Major Project of WIUCAS(WIUCASQD2021004 and WIUCASQD2021035)。
