High conductivity and high density proton conducting Ba1-xSrxCe0.5Zr0.35Y0.1Sm0.05O3-delta (x=0.5, 0.7, 0.9, 1.0) perovskites for IT-SOFC
Journal article, 2016

Solid oxide fuel cell (SOFC) has been achieving attention in term of possibility in variety of fuels. Proton conductor enhanced conventional oxide conducting electrolyte has become more and more interesting particularly in intermediate operating temperature. Combination of doped BaCeO3 and BaZrO3 by doping Sr, Y and Sm was studied as the series of Ba1-xSrxCe0.5Zr0.35Y0.1Sm0.05O3-delta (BSCZYSm) by varying composition x = 0.5, 0.7, 0.9 and 1.0. The X-ray analysis reveals right-shifted peaks due to changing in unit cell volume. The cell parameters and density decreased with increasing Sr content. Rietveld refinement shows that all compositions crystallize in the cubic symmetry in the space group Pm-3m. Thermogravimetric analysis on dried and hydrated samples under nitrogen show significant weight change to prove the proton uptake at higher temperature. Scanning electron microscopy shows that the density is higher than 90% for all samples. BSCZYSm with x = 0.5 shows the highest conductivity in wet argon condition which is 2.391 x 10(-3) S cm(-1) at 700 degrees C. Particle size of materials were examined and reveal average diameter of 5.8 mu m approximately.

Conductivity

Sinterability

SOFC electrolyte

Proton conductor

Rietveld refinement

Author

N. Radenahmad

Universiti Brunei Darussalam

A. Afif

Universiti Brunei Darussalam

P. I. Petra

Universiti Brunei Darussalam

Seikh Mohammad Habibur Rahman

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

Sten Eriksson

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

A. K. Azad

Universiti Brunei Darussalam

International Journal of Hydrogen Energy

0360-3199 (ISSN)

Vol. 41 27 11832-11841

Subject Categories

Inorganic Chemistry

DOI

10.1016/j.ijhydene.2016.02.073

More information

Created

10/8/2017