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A Highly Elastic and Reversibly Stretchable All‐Polymer Supercapacitor
Author(s) -
Wang Yukun,
Chen Feng,
Liu Zhuoxin,
Tang Zijie,
Yang Qi,
Zhao Yan,
Du Shanyi,
Chen Qiang,
Zhi Chunyi
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201908985
Subject(s) - supercapacitor , materials science , polypyrrole , polymer , electrode , electrolyte , bending , conductive polymer , composite material , electrochemistry , nanotechnology , self healing hydrogels , chemical engineering , polymer chemistry , polymerization , chemistry , engineering
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).