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Low-cost, solution processable carbon nanotube supercapacitors and their characterization

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Details

Original languageEnglish
Pages (from-to)1329-1334
Number of pages6
JournalApplied Physics A-Materials Science and Processing
Volume117
Issue number3
DOIs
Publication statusPublished - Nov 2014
Publication typeA1 Journal article-refereed

Abstract

We report ecological and low-cost carbon nanotube (CNT) supercapacitors fabricated using a simple, scalable solution processing method, where the use of a highly porous and electrically conductive active material eliminates the need for a current collector. Electrodes were fabricated on a poly(ethylene terephthalate) substrate from a printable multi-wall CNT ink, where the CNTs are solubilized in water using xylan as a dispersion agent. The dispersion method facilitates a very high concentration of CNTs in the ink. Supercapacitors were assembled using a paper separator and an aqueous NaCl electrolyte and the devices were characterized with a galvanostatic discharge method defined by an industrial standard. The capacitance of the 2 cm(2) devices was 6 mF/cm(2) (2.3 F/g) and equivalent series resistance 80 Omega. Low-cost supercapacitors fabricated from safe and environmentally friendly materials have potential applications as energy storage devices in ubiquitous and autonomous intelligence as well as in disposable low-end products.

Keywords

  • ELECTROCHEMICAL CAPACITORS, PERFORMANCE, DISPERSION, CATALYST

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