Structural, morphological, and electrical characteristics of the electrodeposited cobalt oxide electrode for supercapacitor applications

Journal Article · Sat Jan 15 04:00:00 EST 2011 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2010.09.041· OSTI ID:22209975

Kandalkar, Sunil G.; Lee, Hae-Min ^[1]; Chae, Heeyeop ^[2]; Kim, Chang-Koo ^[1]

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1. Department of Chemical Engineering and Division of Energy Systems Research, Ajou University, San 5, Woncheon-dong, Yeongtong-gu, Suwon 443-749 (Korea, Republic of)
2. Department of Chemical Engineering, Sungkyunkwan University, Suwon 440-746 (Korea, Republic of)

Cobalt oxide (Co{sub 3}O{sub 4}) thin films were prepared through electrodeposition on copper substrates using an ammonia-complexed cobalt chloride solution. The structural and morphological properties of the film were studied using an X-ray diffractometer and scanning electron microscopy, and the results showed that the electrodeposited cobalt oxide film had a nanocrystalline and porous structure. The electrochemical behavior of the electrodeposited cobalt oxide electrode was evaluated in a KOH solution using cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge-discharge tests. The electrodeposited cobalt oxide electrode exhibited a specific capacitance of 235 F/g at a scan rate of 20 mV/s. The specific energy and the specific power of the electrode were 4.0 Wh/kg and 1.33 kW/kg, respectively.

• OSTI ID: 22209975
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 1 Vol. 46; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
AMMONIA
COBALT CHLORIDES
COBALT OXIDES
COPPER
CRYSTALS
ELECTRODEPOSITION
ELECTRODES
ENERGY STORAGE
NANOSTRUCTURES
POTASSIUM HYDROXIDES
SCANNING ELECTRON MICROSCOPY
SPECTROSCOPY
SUBSTRATES
THIN FILMS
X-RAY DIFFRACTOMETERS