Anode fabrication for solid oxide fuel cells: Electroless and electrodeposition of nickel and silver into doped ceria scaffolds
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Published version
Author(s)
Jamil, Z
Ruiz-Trejo, E
Boldrin, P
Brandon, NP
Type
Journal Article
Abstract
A novel fabrication method using electroless and electrodeposited Ni/Ag/GDC for SOFC anodes is presented. First a porous Ce0.9Gd0.1O2−x (GDC) scaffold was deposited on a YSZ electrolyte by screen printing and sintering. The scaffold was then metallized with silver using Tollens' reaction, followed by electrodeposition of nickel from a Watt's bath. The electrodes (Ni/Ag/GDC) were tested in both symmetrical and fuel cell configurations. The microstructures of the Ni/Ag/GDC anodes were analyzed using scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDX). Nano-particles of Ni formed in the porous GDC scaffold provided triple phase boundaries (TPB). The electronic conductivity of the Ni/Ag/GDC (3.5/24.7/71.8 vol%) electrode was good even at relatively low Ni volume fractions. The electrochemical performance was examined in different concentrations of humidified hydrogen (3% H2O) and over a range of temperatures (600–750 °C). The total area specific resistance (ASR) of the anode at 750 °C in humidified 97 vol% H2 was 1.12 Ω cm2, with low-frequency polarization (R_l) as the largest contributor. The electrodes were successfully integrated into a fuel cell and operated in both H2 and syngas.
Date Issued
2016-05-01
Date Acceptance
2016-04-09
Citation
International Journal of Hydrogen Energy, 2016, 41 (22), pp.9627-9637
ISSN
1879-3487
Publisher
Elsevier
Start Page
9627
End Page
9637
Journal / Book Title
International Journal of Hydrogen Energy
Volume
41
Issue
22
Copyright Statement
© 2016, The Authors. Published by Elsevier Ltd on behalf of Hydrogen Energy
Publications, LLC. This is an open access article under the CC BY license (http://
creativecommons.org/licenses/by/4.0/).
Publications, LLC. This is an open access article under the CC BY license (http://
creativecommons.org/licenses/by/4.0/).
License URL
Sponsor
Engineering & Physical Science Research Council (E
Grant Number
Ref: YEP122
Subjects
Energy
09 Engineering
03 Chemical Sciences
Publication Status
Published