title: A self-healable and highly stretchable supercapacitor based on a dual crosslinked polyelectrolyte.
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.
authors.affiliation: Department of Physics and Materials Science, City University of Hong Kong, Hong Kong 999077, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Huang
authors.affiliation: Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Ming
authors.initials: M
authors.lastname: Zhong
authors.affiliation: Department of Physics and Materials Science, City University of Hong Kong, Hong Kong 999077, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Huang
authors.affiliation: Department of Physics and Materials Science, City University of Hong Kong, Hong Kong 999077, China.
authors.forename: Minshen
authors.initials: M
authors.lastname: Zhu
authors.affiliation: Department of Physics and Materials Science, City University of Hong Kong, Hong Kong 999077, China.
authors.forename: Zengxia
authors.initials: Z
authors.lastname: Pei
authors.affiliation: Department of Physics and Materials Science, City University of Hong Kong, Hong Kong 999077, China.
authors.forename: Zifeng
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Department of Physics and Materials Science, City University of Hong Kong, Hong Kong 999077, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Xue
authors.affiliation: Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Xuming
authors.initials: X
authors.lastname: Xie
authors.affiliation: Department of Physics and Materials Science, City University of Hong Kong, Hong Kong 999077, China.|Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518000, China.
authors.forename: Chunyi
authors.initials: C
authors.lastname: Zhi