Effect of Ba-deficiency on the phase and structural stability of (BaSr)(CeZr)O3-based proton conducting oxides

A New High‐Performance Proton‐Conducting Electrolyte for Next‐Generation Solid Oxide Fuel Cells

“…Conductivity versus temperature plots of BSCZYSm in the range of 400–700 °C in wet and dry argon atmospheres. Our results (circle, O; square, □) were compared with the conductivities of 1) (Ba 0.6 Sr 0.4 )(Ce 0.75 Zr 0.10 Y 0.15 )O 3– δ in wet Ar, [ 33 ] 2) BaCe 0.9 Nd 0.1 O 3− δ , [ 34 ] 3) BaCe 0.7 Zr 0.2 Y 0.05 Zn 0.05 O 3 in wet Ar, [ 35 ] 4) BaZr 0.8 Yb 0.2 O 3– δ in wet N 2 , [ 36 ] 5) Sr 0.995 Ce 0.95 Y 0.05 O 3− δ , [ 34 ] and 6) BaCe 0.45 Zr 0.45 Sc 0.1 O 3− δ in wet H 2 . [ 18 ] …”

Synthesis and conductivity behaviour of proton conducting (1−x)Ba0.6Sr0.4Ce0.75Zr0.10Y0.15O3−δ‐xGDC (x=0, 0.2, 0.5) composite electrolytes

“…Firstly, (Ba 0.6 Sr 0.4 )(Ce 0.75 Zr 0.10 Y 0.15 )O 3−δ (abbreviated as Ba 0.6 Sr 0.4 CZY) electrolyte powder was synthesized using cost effective sol‐gel technique by taking appropriate amount of Ba(NO 3 ) 2 (SIGMA ALDRICH), Sr(NO 3 ) 2 (SIGMA ALDRICH), Ce(NO 3 ) 3 ·6H 2 O (KANTO CHEMICALS CO. INC.), ZrO(NO 3 ) 2 (SIGMA ALDRICH), Y(NO 3 ) 3 ·6H 2 O (SIGMA ALDRICH), and oxalic acid (SIGMA ALDRICH) as precursors, as described earlier . Accordingly, these nitrates were first dissolved separately in ethanol.…”

“…X‐ray photoelectron spectra of the composite samples were acquired at room temperature, using a PHI 5000 VersaProbe (Ulvac‐PHI) system and monochromator Al K α (hυ=1486.6 eV) X‐ray source to investigate the electronic states of composite electrolytes. The XPS condition has been already reported earlier . For conductivity measurements, dense bar shaped pellets sintered at 1500°C for 10 hours were formed with platinum electrodes in the four probe configuration and measured with four probe DC technique in an isolated chamber under both wet and dry air/argon gas, with a flow rate of 200 sccm.…”

“…These materials have promising as electrolyte for proton conducting fuel cell (PCFC). The detailed analysis can be found in our earlier paper . Further, the presence of water vapour at one of the electrodes lowers the performance of both PCFCs and SOFCs .…”

“…Therefore, the primary challenge for proton conducting fuel cell oxides is cooperation between conductivity, stability and its sinterability. In our earlier studies, we have found that the composition (Ba 0.6 Sr 0.4 )(Ce 0.75 Zr 0.10 Y 0.15 )O 3−δ (abbreviated as Ba 0.6 Sr 0.4 CZY) shows relatively better structural stability against humid air/boiling water condition and significant proton conductivity . These materials have promising as electrolyte for proton conducting fuel cell (PCFC).…”