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Ionics

, Volume 25, Issue 1, pp 171–180 | Cite as

Performance comparison of Ni Ex-soluted and impregnated La- and Y- doped Sr titanates as anode for solid oxide fuel cell

  • Mohamed Shahid
  • Pankaj Tiwari
  • Suddhasatwa BasuEmail author
Original Paper
  • 167 Downloads

Abstract

Nickel is doped successfully at the B-site of La0.3Y0.1Sr0.4TiO3−δ (LYSTA) perovskite to yield La0.3Y0.1Sr0.4Ni0.04Ti0.96O3−δ (LYSNTA) for its use as an anode for solid oxide fuel cell (SOFC). Ex-soluted nickel particles from LYSNTA formed upon reduction in hydrogen show average particle size of 6 nm. Electrochemical studies are performed on bilayers of LYSTA/YSZ and LYSNTA/YSZ using electrochemical impedance spectroscopy (EIS) and their SOFC performance is compared with 4 wt% NiO-LYSTA/YSZ bilayer prepared by impregnation route. The activation energy (EA) for overall electrode polarization (Rp) shows the following trend: LYSTA (≈ 1.4 eV) > LYSNTA (1.1 eV) ≥ 4 wt% NiO-LYSTA (≈ 1.0 eV) in temperature range of 650–800 °C for H2 oxidation. SOFC performance of full cell containing LYSNTA anode is better compared to 4 wt% NiO-LYSTA anode during reversible testing from methane to hydrogen environment. Impregnation of 6 wt% CeO2 over LYSNTA anode in the full cell of SOFC gives a better performance than that without CeO2.

Keywords

Ex-solution Perovskite Activation energy Impedance Anode/electrolyte bilayer 

Notes

Funding information

This study is with the financial support provided by the Defense Research and Development Organization (DRDO), India for carrying out the research activities.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Mohamed Shahid
    • 1
  • Pankaj Tiwari
    • 1
  • Suddhasatwa Basu
    • 1
    Email author
  1. 1.Department of Chemical EngineeringIndian Institute of TechnologyDelhiIndia

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