Chemical synthesis of Co3O4 nanowires for symmetric supercapacitor device

• Published in: Journal of materials science. Materials in electronics 2018-10, Vol.29 (19), p.16401-16409
• Main Authors: Yadav, A. A., Hunge, Y. M., Kulkarni, S. B.
• Format: Article
• Language: English
• Subjects: Capacitance; Characterization and Evaluation of Materials; Chemical synthesis; Chemistry and Materials Science; Cobalt oxides; Cycles; Electrochemical analysis; Electrons; Emission analysis; Field emission microscopy; Materials Science; Nanowires; Optical and Electronic Materials; Organic chemistry; Scanning electron microscopy; Stability; Substrates; Supercapacitors; X-ray diffraction
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-018-9731-7

In present work, Co 3 O 4 nanowire is successfully prepared on stainless steel substrate by simple chemical bath deposition method and studied the supercapacitor application. The prepared Co 3 O 4 nanowire is analyzed by X-ray diffraction, X-ray photoelectron spectroscopy, field emission scanning electron microscopy and Brunauer–Emmett–Teller techniques. Co 3 O 4 nanowire offers high specific surface area of 66.33 m 2  g −1 for the intercalation of electrolyte ions. Co 3 O 4 nanowires exhibit outstanding electrochemical performance with a high specific capacitance of 850 F g −1 at scan rate of 5 mV s −1 , and excellent long-term cycling stability (86% over 5000 CV cycles). The symmetric solid-state supercapacitor device is fabricated by accumulating two electrodes of Co 3 O 4 nanowire, which shows superior electrochemical performance with specific capacitance of 127 F g −1 , specific energy of 24.18 Wh kg −1 and excellent cycling stability (85% over 3000 CV cycles).