The Influence of the Activation Temperature on the Structural Properties of the Activated Carbon Xerogels and Their Electrochemical Performance

The effect of activation temperature on the structural properties and the electrochemical performance of KOH-activated carbon xerogel was investigated in range of 700 to 1000°C. At a high temperature (1000°C), the chemical activation regenerated a more crystalline network structure of activated carb...

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Bibliographic Details
Published inAdvances in materials science and engineering Vol. 2017; no. 2017; pp. 1 - 9
Main Authors Tran, Hoai-Lam, Chung, Jen-Chieh, Yang, Wein-Duo, Quach, Nguyen Khanh Nguyen
Format Journal Article
LanguageEnglish
Published Cairo, Egypt Hindawi Publishing Corporation 01.01.2017
Hindawi
Hindawi Limited
Subjects
Acids
Activated carbon
Activation
Crystal structure
Electrochemical analysis
Electrodes
Electrolytes
Pore size
Porosity
Properties (attributes)
Scanning electron microscopy
Spectrum analysis
Studies
Temperature
Voltammetry
Xerogels
Taiwan
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Summary:The effect of activation temperature on the structural properties and the electrochemical performance of KOH-activated carbon xerogel was investigated in range of 700 to 1000°C. At a high temperature (1000°C), the chemical activation regenerated a more crystalline network structure of activated carbon xerogels, which was observed by Raman, XRD, and TEM images. Additionally, SEM images, BET, BJH, and t-plot were used to study the structural properties of carbon xerogels. The carbon xerogel sample activated at 900°C was found with the most appropriate structure, which has the high micropore area and a more-balanced porosity between the micropores and mesopores, for using as an electrode material. The highest obtained specific capacitance value was 270 Fg−1 in 6 M KOH electrolyte at scan rate of 5 mVs−1 from the cyclic voltammetry.
ISSN:1687-8434
1687-8442
DOI:10.1155/2017/8308612