We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Ultrasonic-assisted synthesis of magnetite/carbon nanocomposite for electrochemical supercapacitor.
- Authors
Sayahi, Hani; Kiani, M.; Kazemi, S.
- Abstract
Iron oxides are considered as the promising pseudocapacitive materials for high-performance supercapacitors due to their high theoretical specific capacitance, low cost, environmental benignity, and natural abundance. In this work, we study capacitive behavior of different magnetite (FeO) nanoparticles/carbon black (CB) composites ratios. These composites are synthesized by the coprecipitation method in the presence of ultrasonic waves. The structural and morphological characteristics of the magnetite/CB composites are investigated by X-ray diffraction and scanning electron microscopy, respectively. The electrochemical performance of magnetite/CB composite electrodes is tested by cyclic voltammetry and galvanostatic charge/discharge in a NaSO electrolyte. The results indicate that the magnetite/CB electrodes show typical pseudo-capacitive behavior in NaSO solution. Moreover, in comparison to the pure FeO (37 F g) and carbon black (23 F g), the as-prepared 45 % magnetite/CB nanocomposite electrode shows a higher specific capacitance (300 F g). Additionally, the supercapacitor device of the magnetite/CB nanocomposite exhibits excellent long cycle life along with 98.5 % specific capacitance retained after 10,000 cycle tests.
- Subjects
IRON oxides; NANOPARTICLES; CARBON-black; MAGNETITE; ELECTROCHEMISTRY; SOLID state chemistry
- Publication
Journal of Solid State Electrochemistry, 2014, Vol 18, Issue 2, p535
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-013-2289-7