Low-cost, solution processable carbon nanotube supercapacitors and their characterization
Research output: Contribution to journal › Article › Scientific › peer-review
|Number of pages||6|
|Journal||Applied Physics A-Materials Science and Processing|
|Publication status||Published - Nov 2014|
|Publication type||A1 Journal article-refereed|
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.
- ELECTROCHEMICAL CAPACITORS, PERFORMANCE, DISPERSION, CATALYST