Cobalt doped carbon xerogels as efficient supercapacitor electrodes
Afify, H., Abdalla Abdelwahab, A., Abdel-Samad, H., Hassan, H. (2019). Cobalt doped carbon xerogels as efficient supercapacitor electrodes. EKB Journal Management System, 8(1), 105-111. doi: 10.21608/idj.2019.64041
Hany Afify; Abdalla Abdelwahab Abdalla Abdelwahab; Hesham Abdel-Samad; Hamdy Hassan. "Cobalt doped carbon xerogels as efficient supercapacitor electrodes". EKB Journal Management System, 8, 1, 2019, 105-111. doi: 10.21608/idj.2019.64041
Afify, H., Abdalla Abdelwahab, A., Abdel-Samad, H., Hassan, H. (2019). 'Cobalt doped carbon xerogels as efficient supercapacitor electrodes', EKB Journal Management System, 8(1), pp. 105-111. doi: 10.21608/idj.2019.64041
Afify, H., Abdalla Abdelwahab, A., Abdel-Samad, H., Hassan, H. Cobalt doped carbon xerogels as efficient supercapacitor electrodes. EKB Journal Management System, 2019; 8(1): 105-111. doi: 10.21608/idj.2019.64041

Cobalt doped carbon xerogels as efficient supercapacitor electrodes

International Journal of Development
Article 9, Volume 8, Issue 1, 2019, Page 105-111  XML PDF (622.32 K)
Document Type: Original Article
DOI: 10.21608/idj.2019.64041
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Authors
Hany Afify1; Abdalla Abdelwahab Abdalla Abdelwahab2; Hesham Abdel-Samad1; Hamdy Hassan email 1
1Chemistry Department, Faculty of science, Ain-Shams Univ., Abassia, Cairo, 11566, Egypt
2Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences (PSAS), Beni-SuefUniversity, 62511 Beni-Suef, Egypt
Abstract
Carbon xerogel and cobalt doped carbon xerogel are successfully prepared from resorcinol-formaldehyde monomers by the sol-gel process. N2 adsorption/desorption isotherms technique are used to characterize the surface texture and pore size distribution of prepared samples. The measured BET specific surface areas for the carbon xerogel and the cobalt doped carbon xerogel are 796.9 and 701.9 m2.g-1, respectively. These materials were tested as electrodes in a symmetric supercapacitor two-electrode configuration using 1M H2SO4 electrolyte by means of cyclic voltammetery technique. The cobalt doped sample exhibits relatively high specific capacitance of 231 F.g-1 (at 0.1 A.g-1). The presence of cobalt species inside the carbon structure of xerogel lead to lowering the specific surface area, increasing the mesoporosity and consequently enhancing the accessibility for electrolytic ions inside the pores of the cobalt doped samples.
 
Keywords
Cobalt-doped carbon xerogel; Supercapacitors; mesoporosity
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