Oxygen vacancy levels on gadolinia-doped ceria interlayer deposited by atmospheric pressure plasma jet for solid oxide fuel cells. Issue 13 (September 2018)

• Record Type: Journal Article
• Authors: Kuo, Yu-Lin; Kencana, Sagung Dewi; Su, Yu-Ming
• Is Part Of: Ceramics international. Volume 44:Issue 13(2018)
• Page Start: 15262
• Page End: 15268
• Publication Date: 2018-09
• Subjects: Oxygen vacancies -- Carrier gases -- Gadolinia-doped ceria interlayer -- Atmospheric pressure plasma jet -- Solid oxide fuel cell; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.05.169
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The oxygen vacancy levels as a factor on different gadolinia-doped ceria interlayer (GDCi) films deposited on yttria stabilized zirconia (YSZ) electrolyte substrates by an atmospheric pressure plasma jet (APPJ) via precursor solution of nitrate salts are investigated. Focusing on the effect of carrier gases, scanning electron microscopy (SEM), Raman, and X-ray diffraction (XRD) are implemented for the materials characterization of the as-deposited GDCi films and sintered-GDCi films at various temperatures. The higher level of oxygen vacancies in GDCi films adhered on 8YSZ electrolyte are evidently analyzed using Ar as the carrier gas during the deposition, of which the interdiffusion resulted in the formation of (GDC + YSZ) solid solution for sintering over 1300 °C degraded the total conductivity. The deposition of GDCi films on 8YSZ by APPJ method using O2 carrier gas significantly improved the total conductivities of the whole electrolyte layers. Moreover, this study provides the useful insight into the oxygen vacancy levels on GDC films as interlayer (GDCi) to improve the values of open circuit voltage in LSM/GDCi/YSZ/Pt full-cell, as well as offering the efficiency of APPJ as one step deposition process. Highlights: Gadolinia-doped ceria films are fabricated as interlayer in between cathode and electrolyte layers. Different oxygen vacancy levels of gadolinia-doped ceria films are discussed. Metal oxide materials for solid oxide fuel cells are prepared by atmospheric pressure plasma jet.