Hybrid manganese oxide films for supercapacitor application prepared by sol-gel technique

Chin Yi Chen, Sheng Chang Wang, Yue Han Tien, Wen Ta Tsai, Chung Kwei Lin

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Hybrid films were prepared by adding various concentrations of meso-carbon microbeads (MCMB) during sol-gel processing of manganese oxide films. The heat-treated films were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). In addition, electrochemical performance of the MCMB-added Mn-oxide hybrid coatings was evaluated by cyclic voltammetry (CV) and compared with its unadded counterpart. Experimental results showed that Mn-oxide films exhibited a mixture of Mn2O3 and Mn3O4 phases. The higher the heat-treatment temperature, the more Mn2O3 can be observed. The specific capacitance of the unadded Mn-oxide electrodes is 209 F/g. Because the MCMB particles provide more interfacial surface area for electrochemical reactions, a significant improvement can be noticed by adding MCMB in Mn-oxide coatings. The 300 °C heat-treated hybrid Mn-oxide coating with a Mn/MCMB ratio of 10/1 exhibits the highest value of 350 F/g, showing a ~ 170% increase in specific capacitance.

Original languageEnglish
Pages (from-to)1557-1560
Number of pages4
JournalThin Solid Films
Volume518
Issue number5
DOIs
Publication statusPublished - Dec 31 2009
Externally publishedYes

Keywords

  • Cyclic voltammetry
  • Hybrid manganese oxide film
  • Manganese oxide
  • MCMB
  • Supercapacitor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Fingerprint Dive into the research topics of 'Hybrid manganese oxide films for supercapacitor application prepared by sol-gel technique'. Together they form a unique fingerprint.

  • Cite this