Single-layer Carbon Nanotube Electrode Capacitor Not Using Current Collectors

Developed by:
Advanced Industrial Science And Technology (AIST)
http://www.aist.go.jp/index_en.html
イザディナジャファバディ アリ（Maijo University）

The capacitor is increasing its applications because of its many advantageous features such as rapid charging/discharging functions, high power density, long service life, and low internal resistance.
In this circumstance, a new capacitor having single-layer carbon nanotube (high purity) electrodes and elimination of current collectors has been developed. Its performances were evaluated. The result showed that the new capacitor stably operated with application of higher voltage than the capacitor using activated carbon.
Disadvantages of activated carbon: Conductive bonding agent is needed to mold powdered activated carbon into an electrode. Impurities and functional groups, which are on the surface of the bonding agent and the activated carbon, promote deterioration of the electrode. The result is that voltage that is allowed to be applied to the capacitor is at most 3 V or lower, and that the service life of the capacitor is short.
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