Articles
  • Electrochemical properties of Ca1-xLaxTiO3 anode materials for solid oxide fuel cells
  • Jae-Woo Parka and Ki-Tae Leea,b,*
  • a Division of Advanced Materials Engineering, Chonbuk National University Jeonbuk 54896, Korea b Hydrogen and Fuel Cell Research Center, Chonbuk National University, Jeonbuk 54896 Korea
Abstract
In this study, Ca1-xLaxTiO3 (CLT, x = 0, 0.05, 0.1, 0.15, and 0.2) was characterized as an anode material for solid oxide fuel cells. The single-phase Ca1-xLaxTiO3 powder was synthesized in a solid-state reaction via calcination at 1100 oC in both oxidizing and reducing atmospheres. The total conductivity of Ca1-xLaxTiO3 synthesized in a reducing atmosphere was higher than that of Ca1-xLaxTiO3 synthesized in an oxidizing atmosphere at the same composition due to an increase in the amount of Ti3+ ions related to charge carrier, based on X-ray photoelectron spectroscopy (XPS) analysis. The Ca1-xLaxTiO3 showed better tolerance to carbon deposition than Ni-YSZ, and the catalytic activity of the Ca1-xLaxTiO3 synthesized in an oxidizing atmosphere decreased with increasing La content. Of the Ca1-xLaxTiO3 synthesized in a reducing atmosphere, Ca0.85La0.15TiO3 showed the best electrochemical performance.

Keywords: Solid oxide fuel cells, Anode material, Oxide anode, Carbon deposition.

This Article

  • 2017; 18(4): 336-340

    Published on Apr 30, 2017