期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 4, 期 45, 页码 17732-17739出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta08018a
关键词
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资金
- National Natural Science Foundation of China [51473041]
- State Key Laboratory of Robotics and System of Harbin Institute of Technology [SKLRS201604C]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [51521003]
This study reports a self-healable hydrogel electrolyte based on dynamic diol-borate ester bonding for smart electrochemical capacitors (ECs). The electrolyte is prepared via converting polyacrylic acid grafted polyvinyl alcohol (PVA-g-PAA) into a hydrogel in the presence of KCl and borax. The resulting PVA-g-PAA/KCl hydrogel electrolyte exhibits not only good flexibility but also high ionic conductivity up to 41 mS cm(-1). Interestingly, once the electrolyte is cut, it spontaneously restores its configuration, mechanical properties and ionic conductivity within 20 min. The self-healing process takes place at least 15 times under mild conditions without any external stimulus. Based on this unique capability, a smart electrochemical capacitor with self-healable and tailorable characteristics is assembled. The present investigation offers a novel strategy to synthesize self-healable hydrogel electrolytes that might be applied to flexible, wearable and smart energy-storage devices.
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