Hydrothermal preparation of octadecahedron Fe3O4 thin film for use in an electrochemical supercapacitor

✍ Scribed by Jie Chen; Kelong Huang; Suqin Liu

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 943 KB
• Volume: 55
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/j.electacta.2009.04.017

✦ Synopsis

A Fe 3 O 4 film with regularly edge-affected cubic (octadecahedron) morphology was successfully prepared on stainless steel foil by a simple and benign hydrothermal process. The potential for the use of the film in a supercapacitor was tested by investigating the electrochemical behavior of the Fe 3 O 4 film using cyclic voltammetry (CV) and galvanostatic charge/discharge tests. The Fe 3 O 4 film showed a CV indicative of a typical pseudocapactive behavior in 1 mol L -1 Na 2 SO 3 solution. Furthermore, this film exhibited a specific capacitance of 118.2 F g -1 at the current of 6 mA between -1 and 0.1 V with a capacity retention of 88.75% after 500 cycles.