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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 30, Number 9
BKCSDE 30(9)
September 20, 2009 

 
Title
Electrochemical Properties of Activated Polyacrylonitrile/pitch Carbon Fibers Produced Using Electrospinning
Author
Bo Hye Kim, Nhu Ngoc Bui, Kap Seung Yang*, Marilou E dela Cruz, John P Ferraris
Keywords
Electrospinnability, Blend, Activated carbon fiber, Supercapacitor, Electrochemical test
Abstract
The electrospinnability of pitch was improved by blending in a solution of polyacrylonitrile (PAN) resulting in the reduction of the average fiber diameter from 2000 to 750 nm. Activated carbon fibers (ACFs) derived by stabilization, carbonization and steam activation at 700, 800, and 900 oC of the PAN/pitch electrospun fibers for 60 min were investigated as electrodes for supercapacitors. The Brunauer, Emmett, Teller (BET) specific surface area ranged from 732 to 1877 m2g-1 and the specific capacitance from 75.5 to 143.5 Fg-1, depending on the activation conditions. Electrodes from the electrospun web activated at 900 oC exhibited a particularly quick response showing a high frequency of 5.5 Hz at a phase angle of ?45o of the impedance spectroscopy.
Page
1967 - 1972
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