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- Title
High energy flexible supercapacitors formed via bottom-up infilling of gel electrolytes into thick porous electrodes.
- Authors
Xiangming Li; Jinyou Shao; Sung-Kon Kim; Chaochao Yao; Junjie Wang; Yu-Run Miao; Qiye Zheng; Pengcheng Sun; Runyu Zhang; Braun, Paul V.
- Abstract
Formation of thick, high energy density, flexible solid supercapacitors is challenging because of difficulties infilling gel electrolytes into porous electrodes. Incomplete infilling results in a low capacitance and poor mechanical properties. Here we report a bottom-up infilling method to overcome these challenges. Electrodes up to 500 µm thick, formed from multi-walled carbon nanotubes and a composite of poly(3,4-ethylenedioxythiophene), polystyrene sulfonate and multi-walled carbon nanotubes are successfully infilled with a polyvinyl alcohol/ phosphoric acid gel electrolyte. The exceptional mechanical properties of the multi-walled carbon nanotube-based electrode enable it to be rolled into a radius of curvature as small as 0.5 mm without cracking and retain 95% of its initial capacitance after 5000 bending cycles. The areal capacitance of our 500 µm thick poly(3,4-ethylenedioxythiophene), polystyrene sulfonate, multi-walled carbon nanotube-based flexible solid supercapacitor is 2662mF cm-2 at 2mV s-1, at least five times greater than current flexible supercapacitors.
- Publication
Nature Communications, 2018, Vol 9, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-018-04937-8