An Ultrastretchable and Highly Conductive Hydrogel Electrolyte for All‐in‐One Flexible Supercapacitor With Extreme Tensile Resistance

超级电容器 电解质 材料科学 导电体 极限抗拉强度 复合材料 电极 电化学 化学 物理化学
作者
Yichen Li,Xuyan Wei,Fan Jiang,Yue Wang,Mingshu Xie,Jing Peng,Congwei Yi,Jiuqiang Li,Maolin Zhai
出处
期刊:Energy & environmental materials [Wiley]
被引量:5
标识
DOI:10.1002/eem2.12820
摘要

Stretchability is a crucial property of flexible all‐in‐one supercapacitors. This work reports a novel hydrogel electrolyte, polyacrylamide‐divinylbenzene‐Li 2 SO 4 (PAM‐DVB‐Li) synthesized by using a strategy of combining hydrophobic nodes and hydrophilic networks as well as a method of dispersing hydrophobic DVB crosslinker to acrylamide monomer/Li 2 SO 4 aqueous solution by micelles and followed γ‐radiation induced polymerization and crosslinking. The resultant PAM‐DVB‐Li hydrogel electrolyte possesses excellent mechanical properties with 5627 ± 241% stretchability and high ionic conductivity of 53 ± 3 mS cm −1 . By in situ polymerization of conducting polyaniline (PANI) on the PAM‐DVB‐Li hydrogel electrolyte, a novel all‐in‐one supercapacitor, PAM‐DVB‐Li/PANI, with highly integrated structure is prepared further. Benefiting from the excellent properties of hydrogel electrolyte and the all‐in‐one structure, the device exhibits a high specific capacitance of 469 mF cm −2 at 0.5 mA cm −2 , good cyclic stability, safety, and deformation damage resistance. More importantly, the device demonstrates a superior tensile resistance (working normally under no more than 300% strain, capacitance stability in 1000 cycles of 1000% stretching and 10 cycles of 3000% stretching) far beyond that of other all‐in‐one supercapacitors. This work proposes a novel strategy to construct tensile‐resistant all‐in‐one flexible supercapacitors that can be used as an energy storage device for stretchable electronic devices.
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