The Capacitor Properties of KOH Activated Porous Carbon Beads Derived from Polyacrylonitrile

Polyacrylonitrile (PAN)-derived carbon beads with uniform size and high surface area were successfully prepared by the carbonization of PAN and activation by KOH. Physicochemical analysis revealed that the PAN-derived carbon beads activated by KOH possessed larger pore volume and pore width than the...

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Bibliographic Details
Published inBulletin of the Chemical Society of Japan Vol. 92; no. 4; pp. 832 - 839
Main Authors Tenmyo, Hiroshi, Sugihara, Ryosuke, Ohta, Atsushi, Uematsu, Taro, Tsuda, Tetsuya, Maruyama, Jun, Iwasaki, Satoshi, Uyama, Hiroshi, Kuwabata, Susumu
Format Journal Article
LanguageEnglish
Published Tokyo The Chemical Society of Japan 2019
Chemical Society of Japan
Subjects
Acetylene
Activated carbon
Aqueous electrolytes
Beads
Capacitors
Carbonization
Electric double layer
Electrodes
Nonaqueous electrolytes
Polyacrylonitrile
Electric double layer capacitor
Polyacrylonitrile
Porous carbon beads
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Summary:Polyacrylonitrile (PAN)-derived carbon beads with uniform size and high surface area were successfully prepared by the carbonization of PAN and activation by KOH. Physicochemical analysis revealed that the PAN-derived carbon beads activated by KOH possessed larger pore volume and pore width than the same types of carbon beads activated by CO2 and commercially available activated carbon powder. Even if the PAN-derived carbon beads were made into an electrode without any conducting supplements, the electrode possessed a higher specific capacitance than an electrode composed of commercially available activated carbon in the presence of conducting acetylene black powders. Origins of such desirable properties as carbon materials used for electric double layer capacitors were investigated by AC impedance measurements in both aqueous and non-aqueous electrolyte solutions.
ISSN:0009-2673
1348-0634
DOI:10.1246/bcsj.20180370