Low-cost, solution processable carbon nanotube supercapacitors and their characterization
Lehtimäki, Suvi; Tuukkanen, Sampo; Pörhönen, Juho; Moilanen, Pasi; Virtanen, Jorma; Honkanen, Mari; Lupo, Donald (2014-11)
Lehtimäki, Suvi
Tuukkanen, Sampo
Pörhönen, Juho
Moilanen, Pasi
Virtanen, Jorma
Honkanen, Mari
Lupo, Donald
11 / 2014
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tty-201603183661
https://urn.fi/URN:NBN:fi:tty-201603183661
Kuvaus
Peer reviewed
Tiivistelmä
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.
Kokoelmat
- TUNICRIS-julkaisut [14556]