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Strong and Robust Polyaniline‐Based Supramolecular Hydrogels for Flexible Supercapacitors
Author(s) -
Li Wanwan,
Gao Fengxian,
Wang Xiaoqian,
Zhang Ning,
Ma Mingming
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201603417
Subject(s) - supercapacitor , capacitance , polyaniline , materials science , self healing hydrogels , polyvinyl alcohol , nanotechnology , chemical engineering , polymer , composite material , polymer chemistry , electrode , chemistry , polymerization , engineering
Abstract We report a supramolecular strategy to prepare conductive hydrogels with outstanding mechanical and electrochemical properties, which are utilized for flexible solid‐state supercapacitors (SCs) with high performance. The supramolecular assembly of polyaniline and polyvinyl alcohol through dynamic boronate bond yields the polyaniline–polyvinyl alcohol hydrogel (PPH), which shows remarkable tensile strength (5.3 MPa) and electrochemical capacitance (928 F g −1 ). The flexible solid‐state supercapacitor based on PPH provides a large capacitance (306 mF cm −2 and 153 F g −1 ) and a high energy density of 13.6 Wh kg −1 , superior to other flexible supercapacitors. The robustness of the PPH‐based supercapacitor is demonstrated by the 100 % capacitance retention after 1000 mechanical folding cycles, and the 90 % capacitance retention after 1000 galvanostatic charge–discharge cycles. The high activity and robustness enable the PPH‐based supercapacitor as a promising power device for flexible electronics.