Advanced Materials: TechConnect Briefs 2015Advanced Materials TechConnect Briefs 2015

Carbon Nano Structures & Devices Chapter 3

SWCNT vs MWCNT and Nanofibers. Applications in lithium-ion batteries and transparent conductive films

M. Predtechenskiy, A. Bezrodny, O. Bobrenok, A. Kochnev, A. Kosolapov, N. Krechetova, V. Saik
OCSiAl LLC (OCSiAl Group), United States

pp. 115 - 117

Keywords: carbon nanotubes, CNT, li-ion battery, transparent conductive film

Among the most promising applications of carbon nanotubes are their use as additives in electrode material of lithium-ion batteries and in the production of flexible transparent conductive films. Experiments with various types of cathode materials of lithium-ion batteries have been carried out. It is shown that adding nanofibers and CNTs in electrode material reduces the resistance of a battery and increases its cycle life, with the effect of nanotubes being much higher than that of nanofibers. It is shown that the addition of 0.01% of SWCNT results in a significant increase of the battery cycle life (Fig.2). To achieve the same parameters in a battery using MWNT as a conductive additive, one should add more than 1% of nanotubes. It is well known that CNT can be used to produce conductive coating on the surface of polymer film.We have prepared conductive films on PET surface by the use of spay coating and “doctor blade”. The resistance of film made of SWNT was about 60 Om/sq., while its transmittance was above 90% at 550 nm. We have compared it to a film made with commercially available MWNTs. Its resistance was from 10 to 100 times higher at about the same transmittance.