Fish bladder-based activated carbon/Co3O4/TiO2 composite electrodes for supercapacitors

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dc.contributor.author Sirengo, Keith
dc.contributor.author Jande, Yusufu A.
dc.contributor.author Kibona, Talam Enock
dc.contributor.author Hilonga, Askwar
dc.contributor.author Muiva, Cosmas M.
dc.contributor.author King'ondu, Cecil K.
dc.date.accessioned 2020-03-31T07:49:53Z
dc.date.available 2020-03-31T07:49:53Z
dc.date.issued 2019-06-15
dc.identifier.uri https://doi.org/10.1016/j.matchemphys.2019.04.059
dc.identifier.uri https://dspace.nm-aist.ac.tz/handle/123456789/694
dc.description This research article published by Elsevier B.V., 2019 en_US
dc.description.abstract Cobalt oxide/titanium dioxide/activated carbon (Co3O4/TiO2/Ac) composite was synthesized using simple sol-gel method before annealing at 300 °C. Fish bladder derived porous carbon used for the composite was synthesized by pyrolysis followed by chemical activation. Both scanning electron microscopy (SEM) and X-ray diffraction displayed Co3O4 and TiO2 phases well embedded onto the carbon matrices. Cyclic voltammetry in 6 M KOH electrolyte demonstrated that the composite has an excellent specific capacity of 946 Fg-1 for Co3O4/TiO2/Ac as compared to Co3O4/Ac, TiO2/Ac, and Ac with specific capacitances of 845, 340, and 308 F g−1, respectively at 5 mVs−1. Impedance spectroscopy reveals that the composite has good capacitive behavior with a series resistance of 0.6 Ω. Besides, Co3O4/TiO2/Ac maintains 89.7% of the initial capacitance after 2000 cycles. This study shows that the synergistic effect of the metal oxides and the carbon in the composite can enhance capacitance for practical supercapacitor applications. en_US
dc.language.iso en en_US
dc.publisher Elsevier B.V. en_US
dc.subject Fish bladder activated carbon en_US
dc.subject Specific capacitance en_US
dc.subject Cobalt oxide en_US
dc.subject Titanium dioxide en_US
dc.title Fish bladder-based activated carbon/Co3O4/TiO2 composite electrodes for supercapacitors en_US
dc.type Article en_US

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