Effective buffer layer thickness of La-doped CeO2 for high durability and performance on La0.9Sr0.1Ga0.8Mg0.2O3-δ electrolyte supported type solid oxide fuel cells. Issue 4 (April 2021)

• Record Type: Journal Article
• Authors: Hwang, Kuk-Jin; Jang, Mi; Kim, Min Kyu; Lee, Seok Hee; Shin, Tae Ho
• Is Part Of: Journal of the European Ceramic Society. Volume 41:Issue 4(2021)
• Page Start: 2674
• Page End: 2681
• Publication Date: 2021-04
• Subjects: Solid oxide fuel cells (SOFCs) -- Lanthanum-doped ceria -- Ni-Fe bimetal anode -- Interfacial reaction -- Lanthanum gallate oxide; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2020.11.036
• Languages: English
• ISSNs: 0955-2219

Abstract

Graphical abstract: Abstract: Solid oxide fuel cells (SOFCs) have been gaining increased attention in the energy sector. Commonly, yttria-stabilized zirconia is widely employed as commercial electrolyte, however, resulted in drawbacks such as high-temperature operating and low conductivity which negatively affect the durability and efficiency. Thus there are many efforts to find high-ionic conductors. From the point of manufacturing, the major difficulty of LaGaO3 -based electrolyte as a high-ionic conductor is its incompatibility with commercial Ni-based anodes during high-temperature processes as well as operating. Several interlayers have been introduced to prevent the reaction between LaGaO3 -based electrolyte and Ni-based anode. In this study, we investigate the optimal thickness of the La-doped CeO2 (LDC) interlayer by the screen-printing method using La0.9 Sr0.1 Ga0.8 Mg0.2 O3- δ for the commercial electrolyte supported SOFCs. As a result, the superior power performance of 2.2 W·cm −2 at 1123 K is achieved through the optimized LDC thickness of 20 μm through not lab-scaled but commercial ceramic manufacturing processing.