Transparent and Flexible Supercapacitors with Single Walled Carbon Nanotube Thin Film Electrodes
By Yuksel, Recep; Sarioba, Zeynep; Cirpan, Ali; Hiralal, Pritesh & Unalan, Husnu Emrah
Published in ACS Applied Materials & Interfaces
NULL
2014
Abstract
We describe a simple process for the fabrication of transparent and flexible, solid-state supercapacitors. Symmetric electrodes made up of binder-free single walled carbon nanotube (SWCNT) thin films were deposited onto polydimethylsiloxane substrates by vacuum filtration followed by a stamping method, and solid-state supercapacitor devices were assembled using a gel electrolyte. An optical transmittance of 82% was found for 0.02 mg of SWCNTs, and a specific capacitance of 22.2 F/g was obtained. The power density can reach to 41.5 kW·kg -1 and shows good capacity retention (94%) upon cycling over 500 times. Fabricated supercapacitors will be relevant for the realization of transparent and flexible devices with energy storage capabilities, displays and touch screens in particular.
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