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The improving thick film properties of Er 2 O 3 doping fcc ‐ZrO 2 type solid electrolyte for SOFC applications
Author(s) -
Yildiz Esra,
Özdal Hilal,
Kepenek Sevgi Ata,
Türkoğlu Orhan
Publication year - 2019
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13340
Subject(s) - materials science , non blocking i/o , solid oxide fuel cell , electrolyte , cathode , analytical chemistry (journal) , anode , doping , electrical resistivity and conductivity , electrode , chemistry , biochemistry , optoelectronics , chromatography , electrical engineering , engineering , catalysis
In this study, the binary system of (ZrO 2 ) 1‐ x (Er 2 O 3 ) x was investigated in the doping range of x ; 0.02 ≤ x ≤ 0.12 by the Pechini method. According to X‐ray diffraction (XRD) measurement results, Er 2 O 3 doping face‐centered cubic ( fcc ) ZrO 2 ‐based solid solution was stabilized in the doping range of 0.08 ≤ x ≤ 0.12 at 1200°C for 12 hours. Thick films of fcc ‐ZrO 2 type powders were produced using ethyl cellulose organic binder mixture and spin‐coating method. The crystallographic, microstructural, and electrical conductivity properties of the thick films were characterized via XRD, SEM, and a.c. impedance measurements, respectively. 8‐ESZ ((ZrO 2 ) 1‐ x (Er 2 O 3 ) x , x = 0.08) thick film electrolyte showed the highest electrical conduction level which is 2.51 × 10 −2 ohm −1 cm −1 at 850°C under 150 mL min −1 O 2 volumetric flow rate. All thick film properties of fcc ‐ESZ materials were optimized and improved experimentally for using as a solid electrolyte component in solid oxide fuel cell (SOFC) systems. A pre‐treatment of 8‐ESZ and the cathode‐supported type electrochemical cell were primarily fabricated. The power density measurements of 40‐LNF (LaNi 1‐ x Fe x O 3 , x = 0.4) Cathode|Cathode Active (50:50 wt % 40‐LNF:8‐ESZ)| 8‐ESZ Electrolyte|Anode Active (60:40 wt % NiO:8‐ESZ)|NiO Anode Electrode cell stack suggest that the produced electrolytes had the usefully properties for SOFC applications.