A self-healable and highly stretchable supercapacitor based on a dual crosslinked polyelectrolyte

Yan Huang, Ming Zhong, Yang Huang, Minshen Zhu, Zengxia Pei, Zifeng Wang, Qi Xue, Xuming Xie () and Chunyi Zhi ()
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Yan Huang: City University of Hong Kong
Ming Zhong: Laboratory of Advanced Materials (MOE), Tsinghua University
Yang Huang: City University of Hong Kong
Minshen Zhu: City University of Hong Kong
Zengxia Pei: City University of Hong Kong
Zifeng Wang: City University of Hong Kong
Qi Xue: City University of Hong Kong
Xuming Xie: Laboratory of Advanced Materials (MOE), Tsinghua University
Chunyi Zhi: City University of Hong Kong

Nature Communications, 2015, vol. 6, issue 1, 1-8

Abstract: Abstract Superior self-healability and stretchability are critical elements for the practical wide-scale adoption of personalized electronics such as portable and wearable energy storage devices. However, the low healing efficiency of self-healable supercapacitors and the small strain of stretchable supercapacitors are fundamentally limited by conventional polyvinyl alcohol-based acidic electrolytes, which are intrinsically neither self-healable nor highly stretchable. Here we report an electrolyte comprising polyacrylic acid dual crosslinked by hydrogen bonding and vinyl hybrid silica nanoparticles, which displays all superior functions and provides a solution to the intrinsic self-healability and high stretchability problems of a supercapacitor. Supercapacitors with this electrolyte are non-autonomic self-healable, retaining the capacitance completely even after 20 cycles of breaking/healing. These supercapacitors are stretched up to 600% strain with enhanced performance using a designed facile electrode fabrication procedure.

Date: 2015
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DOI: 10.1038/ncomms10310

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