Investigation of Supercapacitive Behaviour of Electrodeposited Cobalt Oxide Thin Film by Potentiostatic Mode

Authors S.S. Gavande1,2, Y.H. Navale3, A.S. Salunkhe3, Shivani Gavande3, P.S. Kulkarni4, B.R. Karche2
Affiliations

1Department of Physics, Sangameshwar College, 413003 Solapur (M.S.), India

2Department of Physics, Shankarrao Mohite Mahavidyala, Akluj, Dist. Solapur (M.S), India

3Functional Materials Research Laboratory, School of Physical Sciences, P.A. Holkar SolapurUniversity, 413255 Solapur (M.S.), India

4S.E.S. Polytechnic College, Samrat Chowk Solapur, (M.S), India

Е-mail shubhangi.gavande15@gmail.com
Issue Volume 12, Year 2020, Number 2
Dates Received 12 February 2020; revised manuscript received 15 April 2020; published online 25 April 2020
Citation S.S. Gavande, Y.H. Navale, et al., J. Nano- Electron. Phys. 12 No 2, 02011 (2020)
DOI https://doi.org/10.21272/jnep.12(2).02011
PACS Number(s) 81.15.Pq, 82.47.Uv
Keywords Cobalt oxide, Electrodeposition (5) , Thin films (60) , Cyclic voltammetry (2) , Supercapacitor (3) , Charge-discharge.
Annotation

Cobalt oxide films were prepared potentiostatically on stainless steel substrates. The as-deposited Co3O4 films were annealed at 400 °C, 500 °C, 600 °C and were analyzed. The structural analysis of films was carried out by X-ray diffraction technique and wettability parameters by Contact angle measurements at different annealed temperatures. The electrochemical supercapacitive behaviour of Cobalt oxide thin film was studied through Electrochemical properties using cyclic voltammetry and galvanostatic charge-discharge analysis which were carried out in 1 M aqueous KOH, 1 M aqueous NaOH and 1 M aqueous Na2SO4 electrolytes at a scan rate of 5 mVs – 1 with a three-electrode cell at different annealed temperatures. The film exhibited maximum specific capacitance of 284.4 Fg – 1 at a scan rate of 5 mVs – 1, specific energy 4.325 Whkg – 1, specific power 3 kWkg – 1 and coulomb efficiency 53.75 % in 1 M Na2SO4 electrolyte at optimized annealed temperature of 500 °C. In 1 M KOH electrolyte specific capacitance of Cobalt oxide electrode was 182.03 Fg – 1 at a scan rate 5 mVs – 1, specific energy 3.570 Whkg – 1, specific power 2.00 kWkg – 1 annealed at 500 °C. In 1 M NaOH electrolyte, annealed at 500 °C, the specific capacitance of Cobalt oxide electrode was 176.33 Fg – 1 at a scan rate 5 mVs – 1, specific energy 4.37 Whkg – 1, specific power 2.33 kWkg – 1.

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