Cobalt oxide nanocubes as electrode material for the performance evaluation of electrochemical supercapacitor |
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Authors: | Gwang-Su Jang Sadia Ameen M Shaheer Akhtar Hyung-Shik Shin |
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Affiliation: | 1. Energy Materials & Surface Science Laboratory, Solar Energy Research Center, School of Chemical Engineering, Chonbuk National University, Jeonju 54896, Republic of Korea;2. New & Renewable Energy Material Development Center (NewREC), Chonbuk National University, Jeonbuk, Republic of Korea |
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Abstract: | Porous cobalt oxide (Co3O4) nanocubes (NCs) were synthesized by a simple and cost-effective hydrothermal technique for the potential application of electrochemical supercapacitors. The hydrothermally synthesized materials exhibited the small cube like morphology with the average size of ~ 50 to 60 nm. The surface analysis revealed a good surface area, and high pore volume of the synthesized porous Co3O4 NCs. The capacitive properties of porous Co3O4 NCs electrode were investigated by cyclic voltammetry (CV) in 6 M KOH electrolyte and a high specific capacitance of ~ 430.6 F/g at a scan rate of ~ 10 mV s?1 was observed. The capacity retention of up to ~ 85% after 1000 cycles was shown by the fabricated porous Co3O4 NCs electrode. The porous Co3O4 NCs showed excellent structural stability through cycling with promising capacity retention which suggested a good quality of porous Co3O4 NCs as electrochemical supercapacitor electrode. |
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Keywords: | Nanocubes Electrode Supercapacitors Specific capacitance |
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