Preparation of nano-crystalline strontium-doped lanthanum manganate (LSM) powder and porous film by aerosol flame deposition
- Title
- Preparation of nano-crystalline strontium-doped lanthanum manganate (LSM) powder and porous film by aerosol flame deposition
- Author
- 신동욱
- Keywords
- Nanoparticle; High specific surface area; Lanthanum strontium manganate (LSM); Aerosol flame deposition (AFD); Solid oxide fuel cells (SOFCs); OXIDE FUEL-CELLS; STABILIZED ZIRCONIA; ELECTROCHEMICAL CHARACTERISTICS; IMPEDANCE SPECTROSCOPY; SYNTHESIS ROUTES; CATHODES; ELECTRODES; LA1-XSRXMNO3; PERFORMANCE; MICROSTRUCTURE
- Issue Date
- 2014-01
- Publisher
- ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
- Citation
- Ceramics International,2014,40(4), P 5567-5573
- Abstract
- To improve the performance of the cathode, many groups have studied the relationship between the cathode microstructure and the electrochemical performance. In this study, a porous La0.8Sr0.2MnO3 +/- (delta)(LSM) cathode film with primary particles of under 10 nm diameters was prepared by aerosol flame deposition (AFD). The AFD technique was applied to synthesize the spherical particles and dense LSM thin film. The cathode performance was improved, and the polarization resistance was decreased by extending the active triple phase boundary. The electrochemical characteristics were investigated in the temperature range of 600-900 degrees C and oxygen partial pressure range of 0.1-1.0 atm. For oxygen reduction reaction on the LSM cathode, it was turned out that both oxygen atom diffusion and oxygen ion transfer from the three phase boundary to the yttria-stabilized zirconia electrolyte lattice were the rate-determining steps with comparable contributions. The polarization resistance of the prepared LSM film decreased from 206 to 1.7 Omega cm(2) with increasing temperature from about 600 to 900 degrees C and the activation energy was 1.48 eV. (c) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
- URI
- https://ac.els-cdn.com/S027288421301420X/1-s2.0-S027288421301420X-main.pdf?_tid=spdf-2db341df-2ff1-4c38-b69a-e44269e02045&acdnat=1519726235_1ccbd65b69cc2e16e21138718cd739e5http://hdl.handle.net/20.500.11754/46420
- ISSN
- 0272-8842
- DOI
- 10.1016/j.ceramint.2013.10.148
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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