Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6609790 | Electrochimica Acta | 2015 | 8 Pages |
Abstract
Donor-doped SrTiO3 is a promising material for use as an alternative anode to solve stability problems due to carbon coking or Ni coarsening etc. of conventional Ni-cermet anodes. Electro-catalytic Ni nanoparticles can be produced in La and Ni co-doped SrTiO3 or La0.2Sr0.8Ti0.9Ni0.1O3-δ (LSTN) anode when it is exposed to a reducing atmosphere. In this work, we study the effects of Gd0.2Ce0.8O2âδ (GDC) either as an anode interlayer (between anode and electrolyte) or as a composite phase in an anode composed of La and Ni co-doped SrTiO3 (La0.2Sr0.8Ti0.9Ni0.1O3-δ, LSTN). The electrochemical performance (i.e., impedance spectra and power density) of electrolyte-supported cells in which scandia-stabilized zirconia (ScSZ) is used as an electrolyte and LSTN or LSTN-GDC is used as the anode, are examined and compared at 800 °C in H2 and CH4 fuels. LSTN anode was stable and had improved performance in both H2 and CH4 fuels when GDC was composited and also used as an anode interlayer. A significant reduction of anodic polarization resistance in CH4 gas is clearly demonstrated.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Byung Hyun Park, Gyeong Man Choi,