Compositional optimization of gadolinia-doped ceria treatment for enhanced oxygen reduction kinetics in low-temperature solid oxide fuel cells

Jun Woo Kim, Dong Young Jang, Manjin Kim, Heonjae Jeong, Namkeun Kim, Joon Hyung Shim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We report the optimization of the dopant concentration of gadolinia-doped ceria (GDC) to enhance the oxygen reduction reaction (ORR) kinetics for low-temperature solid oxide fuel cells (LTSOFCs). Crystalline GDC layers with uniform nano-granular structures were prepared by aerosol-assisted chemical vapor deposition (AACVD) on the cathode side of a GDC electrolyte. The current-voltage (I–V) characteristics and power performances of the AACVD GDC-treated cells were measured and their cathodic reactions were analyzed by electrochemical impedance spectroscopy (EIS) to investigate the effect of GDC treatments with various dopant compositions. The cell treated with Gd0.14Ce0.86O2-δ was found to show an optimized power performance with the best ORR kinetics, due to its nano-granular structure and high concentration of oxygen vacancies.

Original languageEnglish
Pages (from-to)95-100
Number of pages6
JournalThin Solid Films
Volume624
DOIs
Publication statusPublished - 2017 Feb 28

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Keywords

  • Aerosol-assisted chemical vapor deposition
  • Gadolinia-doped ceria
  • Low-temperature solid oxide fuel cells
  • Oxygen reduction reaction

ASJC Scopus subject areas

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

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