Enhancement of proton conductivity through Yb and Zn doping in BaCe0.5Zr0.35Y0.15O3-delta electrolyte for IT-SOFCs
Artikel i vetenskaplig tidskrift, 2018

The new compositions of BaCe0.5Zr0.3Y0.15-xYbxZn0.05O3-delta perovskite electrolytes (x = 0.1 and 0.15) were prepared by solid state synthesis and final sintering at 1500 degrees C. The obtained ceramics were investigated using X-ray diffraction, scanning electron microscopy, thermo-gravimetric analysis and impedance spectroscopy. The refinement of XRD data confirmed cubic crystal structure with Pm-3m space group for both samples. SEM morphology showed larger and compacted grains which enables obtaining of high density and high protonic conductivity. The relative densities of the samples were about 99% of the theoretical density after sintering at 1500 degrees C. The protonic conductivities at 650 degrees C were 2.8x10(-4) S/cm and 4.2x10(-3) S/cm for x = 0.1 and 0.15, respectively. The obtained results showed that higher Yb-content increases the ionic conductivity and both of these perovskites are promising electrolyte for intermediate temperature solid oxide fuel cells to get high efficiency, long-term stability and relatively low cost energy system.

proton conductor

impedance spectroscopy

perovskite

electrolyte material

Författare

Ahmed Afif

Universiti Brunei Darussalam

Nikdalila Radenahmad

Universiti Brunei Darussalam

Juliana Zaini

Universiti Brunei Darussalam

Abdalla Mohamed Abdalla

Universiti Brunei Darussalam

Habibur Seikh Mohammad Rahman

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

Sten Eriksson

Oorganisk miljökemi 2

Abul Kalam Azad

Universiti Brunei Darussalam

Processing and Application of Ceramics

1820-6131 (ISSN) 2406-1034 (eISSN)

Vol. 12 2 181-189

Ämneskategorier

Oorganisk kemi

Keramteknik

Materialkemi

Mer information

Senast uppdaterat

2018-09-12