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ID 20042
file
creator
Gomibuchi, Emi
Kimura, Koichi
Isobe, Shigehito
Nabeta, Koji
Fujii, Hironobu
subject
graphite
activation
grinding
thermodynamic analysis
electrochemical properties
NDC
Physics
abstract
Nano-structural graphite prepared by ball milling under H2 or Ar atmosphere was studied as an electrode for electric double layer capacitors (EDLCs) by means of a conventional 2-electrode galvanostatic method. Especially, the product prepared under H2 atmosphere using zirconia balls revealed 500 m2g-1 surface area and showed 12 Fg-1 specific capacitance, which was comparable to that of an activated carbon with large specific surface area of 3000 m2g-1 examined as a reference. A proper condition of the milling time is rather a shorter time than ~8 h, where the graphitic feature is remained in the ball milled product. On the other hand, for the sample prepared by using steel balls, the specific capacitance per surface area was several hundreds times smaller than the others, indicating that the small amount of Fe contamination during milling played a negative role for the EDLC properties.
journal title
Carbon
volume
Volume 44
issue
Issue 5
start page
983
end page
988
date of issued
2006-04
publisher
Elsevier B.V.
issn
0008-6223
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
Copyright (c) 2005 Elsevier B.V.
relation url
department
Natural Science Center for Basic Research and Development
Institute for Advanced Materials Research



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