An Ag-coated NiO cathode for MCFCs operating at low temperatures

Shin Ae Song, Min Goo Kang, Jonghee Han, Sung Pil Yoon, SukWoo Nam, In Hwan Oh, Dae Ki Choi

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

To increase the lifetime of molten carbonate fuel cell (MCFC) stacks, a reduction of the operating temperature is needed without decreasing the cell performance. In this study, a Ag coating on a conventional NiO cathode material of MCFC was carried out to enhance the cathode performance at the relatively low operating temperature of 600°. Ag is a material applicable to cathodes for MCFCs because Ag has good catalytic activity for oxygen adsorption and dissociation and high electrical conductivity. The modified cathode was prepared by a vacuum suction method using a nanosized Ag sol suspension, and Ag particles were dispersed homogenously on the surface of a porous Ni plate. After the Ag coating, the cell performance was enhanced significantly from 0.76 to 0.80 V at a 150 mA/cm 2 current density at 600°. The electrochemical impedance spectra show that the reduction of the charge transfer resistance is the main reason for the improvement of the cell performance after the Ag coating.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume158
Issue number6
DOIs
Publication statusPublished - 2011 May 4
Externally publishedYes

Fingerprint

Molten carbonate fuel cells (MCFC)
Cathodes
cathodes
molten carbonate fuel cells
operating temperature
coatings
Coatings
cells
porous plates
Temperature
suction
Polymethyl Methacrylate
Sols
Particles (particulate matter)
catalytic activity
Charge transfer
Catalyst activity
Suspensions
Current density
charge transfer

ASJC Scopus subject areas

  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

Cite this

An Ag-coated NiO cathode for MCFCs operating at low temperatures. / Song, Shin Ae; Kang, Min Goo; Han, Jonghee; Yoon, Sung Pil; Nam, SukWoo; Oh, In Hwan; Choi, Dae Ki.

In: Journal of the Electrochemical Society, Vol. 158, No. 6, 04.05.2011.

Research output: Contribution to journalArticle

Song, Shin Ae ; Kang, Min Goo ; Han, Jonghee ; Yoon, Sung Pil ; Nam, SukWoo ; Oh, In Hwan ; Choi, Dae Ki. / An Ag-coated NiO cathode for MCFCs operating at low temperatures. In: Journal of the Electrochemical Society. 2011 ; Vol. 158, No. 6.
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