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- Title
Basic characteristics of electric double layer capacitor mixing ketjen black as conductive filler.
- Authors
Tashima, Daisuke; Kurosawatsu, Kenji; Taniguchi, Mitsufumi; Uota, Masafumi; Otsubo, Masahisa
- Abstract
In this study, ketjen black was used for polarized electrodes instead of conventionally employed acetylene black in order to improve the capacitance of an activated carbon-based electric double layer capacitor (EDLC). Usually, ketjen black exhibits higher electronic conductivity compared to acetylene black, so that ketjen black could be considered as a conducting fiber. Moreover, N2 absorption-desorption isotherm as well as TEM observation revealed that ketjen black used in this study has different types of pore structures compared to acetylene black. The capacitances of prepared EDLC were evaluated from discharge characteristics. It was found that the ketjen black containing EDLC showed fairly high capacitance compared to the one with acetylene black. In particular, an EDLC with 8 wt% ketjen black showed the highest capacitance among prepared samples. The specific capacitance of the best one was evaluated as 59.2 F/g. It was also found that the EDLC with 8 wt% ketjen black exhibited fairly stable capacitance at elevated temperatures based on the temperature dependence for capacitance in an EDLC with 10 wt% acetylene black and one with 8 wt% ketjen black. © 2008 Wiley Periodicals, Inc. Electr Eng Jpn, 165(1): 1– 8, 2008; Published online in Wiley InterScience (<URL>www.interscience. wiley.com</URL>). DOI 10.1002/eej.20772
- Subjects
CARBON-black; CAPACITOR design &; construction; ELECTRIC conductivity; ELECTRODES; ATMOSPHERIC temperature
- Publication
Electrical Engineering in Japan, 2008, Vol 165, Issue 1, p1
- ISSN
0424-7760
- Publication type
Article
- DOI
10.1002/eej.20772