Pore structure analysis of activated carbon fiber by microdomain-based model.
The pore structures of commercial pitch and PAN-based activated carbon fibers (ACFs) were investigated. The pore size and pore size distribution of pitch-based ACFs were measured by nitrogen adsorption isotherms and 129Xe NMR spectroscopy and compared with each other. Scanning tunneling microscopy showed that the ACFs were composed of spherical microdomain units the size of a few nanometers. The activation mechanism of ACFs was considered and explained by novel hypothesis; the concept of microdomain structure of ACFs was considered and explained to overcome limitation of the conventional fractal hypothesis. Whereas micropores were generated on each microdomain, the origin of mesopores was interdomain pores, resulting from the microdomain hypothesis.
Shiratori
Nanako
N
Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga, Fukuoka 816-8580, Japan.
Lee
Kyung Jin
KJ
Miyawaki
Jin
J
Hong
Seong-Hwa
SH
Mochida
Isao
I
An
Bai
B
Yokogawa
Kiyoshi
K
Jang
Jyongsik
J
Yoon
Seong-Ho
SH