Effects of carbonization temperature on microstructure and electrochemical performances of phenolic resin-based carbon spheres

Activated phenol resin-based carbon spheres (APCS) electrodes with high double layer capacitance and good rate capability were prepared from phenol resin-based spheres (PS) at different carbonization temperatures prior to KOH activation. The carbonization temperature has a marked effect on both the...

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Bibliographic Details
Published in:The Journal of physics and chemistry of solids 2010-03, Vol.71 (3), p.214-218
Main Authors: Du, Xuan, Wang, Cheng-Yang, Chen, Ming-Ming, Zhao, Shuo, Wang, Jin
Format: Article
Language:English
Subjects:
A. Microporous materials
Capacitance
Carbon
Carbonization
D. Electrochemical properties
D. Microstructure
Double layer
Electrodes
Electrolytes
Phenol
Porosity
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Summary:Activated phenol resin-based carbon spheres (APCS) electrodes with high double layer capacitance and good rate capability were prepared from phenol resin-based spheres (PS) at different carbonization temperatures prior to KOH activation. The carbonization temperature has a marked effect on both the pore structure and the electrochemical performances of the APCS in 6 M KOH electrolyte. APCS carbonized at 600 °C results in higher specific surface area and larger pore size, and hence higher capacitance and better rate capability. The specific capacitance of the APCS in 6 M KOH aqueous solution can be as high as 282 F g −1. It remains 252 F g −1 as the current density increases to 1000 mA g −1.
ISSN:0022-3697
1879-2553
DOI:10.1016/j.jpcs.2009.11.007