Jump to main content
Jump to site search


Microstructure dependence of performance degradation for intermediate temperature solid oxide fuel cells based on metallic catalyst infiltrated La- and Ca-doped SrTiO3 anode support

Abstract

Anode-supported solid oxide fuel cells with the configuration of La0.2Sr0.25Ca0.45TiO3 (LSCTA-) anode, YSZ electrolyte and La0.8Sr0.2Co0.2Fe0.8O3 (LSCF)-YSZ cathode were fabricated using tape casting and co-sintering techniques followed by pre-reduction and impregnation. In order to improve the performance, the active anodes were prepared via the wet impregnation of metallic catalysts (Ni or Ni0.75Fe0.25). The impregnation of 3 wt.% nickel significantly improved the fuel cell performance from 43 mW/cm2 for the bare LSCTA- anode to 112 mW/cm2 for the Ni-LSCTA- anode at 700 oC in humidified hydrogen containing 3 vol.% H2O. More interestingly, the substitution of 25 wt.% Fe to Ni further enhances the power density by a factor of 2.5, compared to the Ni-impregnated cell. The cell with bimetallic Ni-Fe catalyst shows the slowesta slower degradation than the other two cells after the first 20-h period. High-resolution back-scattered electron (BSE) and transmission electron microscopy (TEM) images performed on the cross section of the impregnated anodes with time after ion beam preparation show that the sintering of the catalyst particles on the scaffold surface and the interaction between backbone and catalyst are the predominant contributions for the degradation of cell performance.

Back to tab navigation

Supplementary files

Publication details

The article was received on 29 Oct 2017, accepted on 19 Dec 2017 and first published on 19 Dec 2017


Article type: Paper
DOI: 10.1039/C7TA09534A
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
  •   Request permissions

    Microstructure dependence of performance degradation for intermediate temperature solid oxide fuel cells based on metallic catalyst infiltrated La- and Ca-doped SrTiO3 anode support

    L. Lu, C. Ni, D. Miller, M. Cassidy and J. Irvine, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA09534A

Search articles by author

Spotlight

Advertisements