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https://dspace.ctu.edu.vn/jspui/handle/123456789/21858
Title: | Introduction of Co₃O₄ to MnO₂/activated carbon for high performance electrode materials toward electrochemical capacitor application |
Authors: | Le, Van Khu Luong, Thi Thu Thuy Ngo, Kim Chi |
Keywords: | Activated carbon Manganese oxide Cobalt oxide Electrochemical capacitor |
Issue Date: | 2018 |
Series/Report no.: | Vietnam Journal of Chemistry;No 56 .- Page.525-531 |
Abstract: | Cobalt oxide has been chosen for incorporating with MnO₂/activated carbon (AC) material. The samples were characterized by means of X-ray diffraction (XRD), transmission electron microscopy (TEM), and isothermal adsorption - desorption of N₂ at 77.35 K (BET). The results showed that the CoMn/AC samples are amorphous and covered by homogeneous, dispersed oxide particles. The BET surface area and pore volume are up to 2826 m²/g and 1.7441 cm³/g, respectively. The electrochemical characterization was performed using cyclic voltammetry and galvanostatic charge/discharge test in 6.0 M KOH electrolyte. CoMn/AC electrode incorporated with 1.5 % CO₃O₄ exhibited higher specific capacitance than other percentages, reached 358 F/g at a scan rate of 5 mV/s and 1159 F/g at specific current density of 0.5 A/g. The enhanced capacitance is attributed to the combination of two charge storage mechanism: electrical double layer capacitor and pseudo-capacitor. |
URI: | http://dspace.ctu.edu.vn/jspui/handle/123456789/21858 |
ISSN: | 2525-2321 |
Appears in Collections: | Vietnam Journal of Chemistry |
Files in This Item:
File | Description | Size | Format | |
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_file_ Restricted Access | 4.7 MB | Adobe PDF | ||
Your IP: 18.119.166.34 |
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