Application of electroless plating process for multiscale Ni-La0.8Sr0.2Ga0.8Mg0.2O3-sigma SOFC anode fabrication

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An electroless plating process of nickel is introduced to solve the drawbacks of impregnation for developing the multiscale anode of a solid oxide fuel cell (SOFC). Impregnation is the conventional fabrication method of the electrode. The process is not favorable for depositing nanoscale metal catalysts due to severe problems including agglomeration of the catalysts while reducing metal oxides. Thus, as an alternative, we propose electroless plating of nickel to fabricate a multiscale nickel-based SOFC anode. A Ni-LSGM (La0.8Sr0.2-Ga0.8Mg0.2O3-sigma) anode is selected. The low chemical compatibility of LSGM with nickel emphasizes the advantage of the electroless plating process. First, nanoscale nickel particles are successfully applied as the main catalyst of the SOFC anode by plating nickel to the surface of the LSGM scaffold substrate near the triple phase boundary region. Thin film X-ray diffraction and image analysis confirm that pure nanoscale nickel particles form on the entire substrate, even at a low temperature (60 degrees C) without secondary phase formation. Electrochemical impedance spectroscopy analysis is then performed to verify the possibility of implementing an efficient Ni-LSGM anode through nickel electroless plating. As a result, the new Ni-LSGM anode shows similar to 50 times higher electrochemical performance than that of an impregnated Ni-LSGM anode. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2018-03
Language
English
Article Type
Article
Keywords

OXIDE FUEL-CELLS; METAL-SUPPORTED SOFCS; NANOPARTICLES; INFILTRATION; PERFORMANCE; DEPOSITION; HYDRAZINE; STABILITY

Citation

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.43, no.12, pp.6400 - 6405

ISSN
0360-3199
DOI
10.1016/j.ijhydene.2018.01.147
URI
http://hdl.handle.net/10203/241433
Appears in Collection
ME-Journal Papers(저널논문)
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