Electrochemical synthesis and characterization of nanostructured tin oxide for electrochemical redox supercapacitors

• Published in: Electrochemistry communications Vol. 6; no. 8; pp. 849 - 852
• Main Authors: Rajendra Prasad, Kalakodimi, Miura, Norio
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.08.2004; Amsterdam Elsevier Science; New York, NY
• Subjects: Applied sciences; Capacitors. Resistors. Filters; Electrical engineering. Electrical power engineering; Exact sciences and technology; Nanostructure; Potentiodynamic deposition; Power density; SnO 2; Supercapacitors; Various equipment and components; Potentiodynamic deposition; Power density; Supercapacitors; SnO 2; Nanostructure; Performance evaluation; Thin film capacitor; Amorphous material; Energetic efficiency; Tin oxide; Supercapacitor; Electrolytic capacitor; Electrode material
• ISSN: 1388-2481; 1873-1902
• DOI: 10.1016/j.elecom.2004.06.009

Amorphous nanostructured tin oxide (SnO 2) was potentiodynamically deposited onto inexpensive stainless steel (SS) electrode. Potentiodynamic deposition was carried out at a scan rate of 200 mV s −1 from an electrolyte solution of 0.1 M tin dichloride + 0.5 M sodium nitrate + 0.4 M nitric acid. The SnO 2 deposited SS electrodes were characterized by cyclic voltammetry (CV) at various scan rates in 0.1 M Na 2SO 4 for electrochemical redox supercapacitors. A maximum specific capacitance (SC) of 285 F g −1 was obtained from CV at a scan rate of 10 mV s −1. For the same electrode, a SC value of 101 F g −1 was obtained even at a high scan rate of 200 mV s −1, indicating high power characteristics of the material. The SC was found to increase with the increase in specific mass of SnO 2. Long cycle-life and stability of SnO 2 were also demonstrated.