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Issue 6, 2018
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An all-in-one self-healable capacitor with superior performance

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Excellent self-healability is considered as a critical element for next-generation flexible/wearable energy-storage devices. However, realizing superior electrochemical performances remains a big challenge for such devices because self-healability intrinsically offsets their basic energy-storage functions. Here we demonstrate that the conflict can be effectively addressed for a supercapacitor via rationally designing its device configuration at a molecular level. The capacitor is fabricated by in situ integrating polyaniline (PANI) and H2SO4 solution into a single network comprising the copolymer of vinylimidazole and hydroxypropyl acrylate (PVH). The all-in-one configuration combines fast charge-carrier transportation, good structural durability and excellent self-healability. Consequently, the resulting capacitor delivers a high specific areal capacitance and rate capability superior to its counterparts, but also maintains ultra-long cycling life even after breaking/healing 10 times. This example of configuration engineering offers a new and promising avenue to design self-healable energy-storage devices with outstanding performances.

Graphical abstract: An all-in-one self-healable capacitor with superior performance

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Article information

23 Nov 2017
09 Jan 2018
First published
09 Jan 2018

J. Mater. Chem. A, 2018,6, 2500-2506
Article type

An all-in-one self-healable capacitor with superior performance

F. Liu, J. Wang and Q. Pan, J. Mater. Chem. A, 2018, 6, 2500
DOI: 10.1039/C7TA10323A

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