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Water‐Deactivated Polyelectrolyte Hydrogel Electrolytes for Flexible High‐Voltage Supercapacitors
Author(s) -
Wei Junjie,
Zhou Jie,
Su Shasha,
Jiang Jinhua,
Feng Jing,
Wang Qigang
Publication year - 2018
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201801277
Subject(s) - supercapacitor , polyelectrolyte , electrolyte , materials science , self healing hydrogels , energy storage , nanotechnology , chemical engineering , electrochemistry , polymer , electrode , chemistry , polymer chemistry , composite material , power (physics) , physics , quantum mechanics , engineering
With the boom of flexible electronic products and wearable devices, flexible energy storage devices, for example, supercapacitors with high performance, are attracting increasing interest. A flexible water‐deactivated polyelectrolyte hydrogel electrolyte with good mechanical properties and high ionic conductivity was prepared by using an anionic polymer, carboxy methyl cellulose, and a cationic monomer, methacrylamidopropyltrimethyl ammonium chloride. It was then applied in a supercapacitor with flexible activated carbon electrodes. This flexible supercapacitor possesses a high operating voltage of 2.1 V owing to the low electrochemical activity for water within the hydrogel as a result of the ‘molecular cages’ effect and hydrophilic interactions between functional groups and surrounding water molecules. Furthermore, this supercapacitor exhibits good flexibility and tailorability. As the first example of water‐deactivated polyelectrolyte hydrogel electrolytes in applications involving flexible high‐voltage supercapacitors, this work provides a platform for the design of energy storage devices with high energy density for flexible and wearable electronic devices.