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Study of Asymmetric Hybrid Supercapacitor using Carbon and Metal Oxides as Electrode Materials
Objectives: In this paper, we report the fabrication and analysis of twelve (12) different supercapacitors using metal oxide electrode as cathode and carbon electrode as anode. Methods: The metal oxide electrode was prepared using Solgel method by combining any two (2) out of this (3) transition metals Nickle (Ni), Cobalt (Co) and Manganese (Mn) to see which will produce the highest specific capacitance. The work reported here differs from other works, because the degree of inversion was varied by a factor of 0.2 to see the effect it will have on the performance. The morphology and crystal structure of each cell was studied using Scanning Electrode Microscope (SEM), X-Ray Diffraction (XRD), while the performance was tested using Cyclic Voltammetry (CV) and galvanometric analysis. Findings: The obtained CV plots were used to calculate specific capacitance of each cell and comparison of results was made with other supercapacitors. From the SEM images it was observed that sample 11 had large pores this allowed easy diffusion of electrolyte, whereas sample 12 had a non-uniform crystalline image with hairy surface which made it difficult for electrolyte to pass. The highest specific capacitance value obtained was 78 Fg-1 for sample 11 (Mn0.6Co0.4) and the minimum value obtained was 5 Fg-1 (Mn0.8Co0.2) for sample 12. The use of different metal oxides with different inversion factor made it possible to see the contribution of each metal oxide and by combining two out of three made it possible to reduce cost. Applications: With the invention of supercapacitors it made it easy to incorporate for application purpose due to its unique qualities like high power density and good cycle life. It is currently being used in hybrid electrical vehicle, power quality improvement.
Asymmetric Hybrids, Cyclic Voltammetry, Metal Oxide, Specific Capacitance, Supercapacitor.
- Stoller MD, Rouf S. Best practice method for determining an electrode material’s performance for ultracapacitor. Energy and Environ Sci. 2010; 10(9):1294–301.
- Ervina MH, Miller BS, Hanrahan B, Mailly B, Palacios T. A comparison of single-wall carbon nanotube electrochemical capacitor electrode fabrication methods. Electrochim Acta. 2012; 65:37–43.
- Wang Y, Shi Z, Huang Y, Ma Y, Wang C, Chen M, Chen Y. Supercapacitor devices based on graphene materials. J Phys Chem C. 2009; 113(30):13103–7.
- Ann TG, Ganesan R, Thangeeswari T. Redox deposition of manganese oxide nanoparticles on graphite electrode by immersion technique for electrochemical supercpacitors. Indian Journal of Science and Technology. 2016 Jan; 9(1):1–7.
- Miller JR, Simon P. Electrochemical capacitors for energy management. Mater Sci. 2008 Aug; 321(5889):651–2.
- Wu NL. Nanocrystalline oxide supercapacitors. Mater Chem Phys. 2002; 75(1-3):6–11.
- Sneha MP, Prabaharan SRS. Embedded control scheme of stand-alone regenerative braking systme using supercapacitors. Indian Journal of Science and Technology. 2015 Aug; 8(9):1–6.
- Zhang LL, Zhao XS. Carbon-based materials as supercapacitor electrodes. Chem Soc Rev. 2009; 38:2520–31.
- Rajagopalan B, Chung JS. Reduced chemically modified graphene oxide for supercapacitor electrode. Nanoscale Research Lett. 2014; 9(1):1–10.
- Singh AP, Karandikar PB, Tiwari NK. Effect of electrode shape on the parameters of supercapacitor. IEEE International Conference on Industrial Instrumentation and Control; 2015. p. 669–73.
- Zhang LL, Zhou R, Zhao XS. Graphene-based materials as supercapacitor electrodes. J Mater Chem. 2010; 20:5983–92.
- Du Q, Zheng M, Zhang L, Wang Y, Chen J, Xue L, Dai W, Ji G, Cao J. Preparation of functionalized graphene sheets by a low-temperature thermal exfoliation approach and their electrochemical supercapacitive behaviors. Electrochim Acta. 2010; 55(12):3897–903.
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