Transparent and flexible high-power supercapacitor based on carbon nanotube fibre aerogels

Abstract

In this work, we report on the fabrication of continuous transparent and flexible supercapacitors by depositing a CNT network onto a polymer electrolyte membrane directly from an aerogel of ultra-long CNTs produced floating in the gas phase. The supercapacitors combine record power density of $1370kWk{g}^{-1}$ at high transmittance ($ca.70$), high electrochemical stability during extended cycling ($>94$ capacitance retention over $20000cycles$) as well as against repeated $180°$ flexural deformation. They represent a significant enhancement of 1-3 orders of magnitude compared to the prior-art transparent supercapacitors based on graphene, CNTs, and rGO. These features mainly arise from the exceptionally long length of the CNTs, which makes the material behave as a bulk conductor instead of an aspect ratio-limited percolating network, even for electrodes with $>90$ transparency. The electrical and capacitive figures-of-merit for the transparent conductor are $FoMe=2.7$, and $FoMc=0.46F{S}^{-1}c{m}^{-2}$ respectively

References in corpus (3)

• Large-area, all-solid and flexible electric double layer capacitors based on CNT fiber electrodes and polymer electrolytes
• Manganese Dioxide Decoration of Macroscopic Carbon Nanotube Fibers: From High-Performance Liquid-Based to All-Solid-State Supercapacitors
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Cited by in corpus (1)

• Gas-to-nanotextile: high-performance materials from floating 1D nanoparticles