Journal of Materials Science and Engineering with Advanced TechnologyAuthor's: Hisashi Tamai, Mitsunori Nishita and Takeshi Shiono
Pages: [121] - [134]
Received Date: April 1, 2010
Submitted by:
The influence of addition of an electro-conductive substance in carbon
precursors on the performance of electric double layer capacitor
(EDLC) was investigated. As activated carbon precursors, vinylidene
chloride/vinyl chloride copolymer [Poly(VDC-co-VC)], phenol
resin(Novolac), and polydivinylbenzene[Poly(DVB)] were applied and
carbon black was used as an electro-conductive substance. The
activated carbons prepared from these precursors/carbon black
composites were microporous and have high BET surface area more than
The EDLC capacitance of the activated carbon
obtained from Novolac/carbon black composite was increased by addition
of carbon black, whereas the capacitances of activated carbons from
Poly(VDC-co-VC) and Poly (DVB) were decreased. The decrease of EDLC
capacitance of the activated carbon from Novolac/carbon black
composite with increase in discharge current was smaller, compared
with those of activated carbons from Poly(VDC-co-VC) and Poly (DVB).
It was observed by TEM that, the smaller aggregates of carbon black
primary particles were dispersed in activated carbon from
Novolac/carbon black composite, compared with those in activated
carbons from Poly(VDC-co-VC) and Poly (DVB). These results suggested
that, the uniform dispersing of electro-conductive substance such as
carbon black in carbon matrix is effective for EDLC capacitance.
activated carbons, electro-conductive substance, EDLC capacitance.
