Journal
NATURE COMMUNICATIONS
Volume 9, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-018-04937-8
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Funding
- National Science Foundation Engineering Research Center for Power Optimization of Electro Thermal Systems (POETS) [EEC-1449548]
- Major Research Plan of NSFC on Nanomanufacturing [91323303]
- NSFC Funds [51522508, 51505372]
- China Postdoctoral Science Foundation through the State Key Laboratory for Manufacturing Systems Engineering at Xi'an Jiaotong University [2016T90905, 2015M570824]
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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 mu m 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 mu m thick poly(3,4-ethylenedioxythiophene), polystyrene sulfonate, multi-walled carbon nanotube-based flexible solid supercapacitor is 2662 mF cm(-2) at 2mV s(-1), at least five times greater than current flexible supercapacitors.
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