Volume 58, Issue 44 pp. 15707-15711
Communication

A Highly Elastic and Reversibly Stretchable All-Polymer Supercapacitor

Yukun Wang

Yukun Wang

School of Materials Science and Engineering, Beihang University, Beijing, 100191 China

Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region, 999077 China

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Feng Chen

Feng Chen

School of Materials Science and Engineering, Henan Polytechnic University, No 2001 Century Avenue, Jiaozuo, 454003 China

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Zhuoxin Liu

Zhuoxin Liu

Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region, 999077 China

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Zijie Tang

Zijie Tang

Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region, 999077 China

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Qi Yang

Qi Yang

Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region, 999077 China

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Prof. Yan Zhao

Prof. Yan Zhao

School of Materials Science and Engineering, Beihang University, Beijing, 100191 China

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Prof. Shanyi Du

Prof. Shanyi Du

School of Materials Science and Engineering, Beihang University, Beijing, 100191 China

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Prof. Qiang Chen

Corresponding Author

Prof. Qiang Chen

School of Materials Science and Engineering, Henan Polytechnic University, No 2001 Century Avenue, Jiaozuo, 454003 China

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Prof. Chunyi Zhi

Corresponding Author

Prof. Chunyi Zhi

Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region, 999077 China

Shenzhen Research Institute, City University of Hong Kong, Shenzhen, China

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First published: 23 August 2019
Citations: 202

Graphical Abstract

Elastic supercaps: An agar/hydrophobically associated polyacrylamide (HPAAm) double network (DN) hydrogel and pure polypyrrole (PPy) film based all-polymer supercapacitor was fabricated. It is highly elastic and reversibly stretchable. This supercapacitor can be stretched and recovered for 1000 times with no obvious performance degradation and strain residue, exhibiting excellent elasticity at the device level.

Abstract

Multiple stretchability has never been demonstrated as supercapacitors because the hydrogel used cannot fully recover after being heavily deformed. Now, a highly reversibly stretchable all-polymer supercapacitor was fabricated using a developed double network hydrogel (DN hydrogel) as electrolyte and pure polypyrrole (PPy) as electrode. The DN hydrogel provides excellent mechanical properties, which can be stretched up to 500 % many times and then restore almost 100 % of the original length. To fabricate the fully recoverable stretchable supercapacitor, we annealed a free-standing pure conducting polymer film as electrode so that the electrodes induced retardance is minimized. The as-fabricated DN hydrogel/pure conducting polymer supercapacitors can be perfectly recovered from 100 % strain with almost no residual deformation left and the electrochemical performance can be maintained even after 1000 stretches (but not bending).

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