Anode Fabrication for Solid Oxide Fuel Cells: Electroless and Electrodeposition of Nickel and Silver into Doped Ceria Scaffolds

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Title: Anode Fabrication for Solid Oxide Fuel Cells: Electroless and Electrodeposition of Nickel and Silver into Doped Ceria Scaffolds
Authors: Jamil, Z
Ruiz-Trejo, E
Boldrin, P
Brandon, N
Item Type: Journal Article
Abstract: © 2016 The Authors.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 Watts 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.
Issue Date: 1-May-2016
Date of Acceptance: 9-Apr-2016
URI: http://hdl.handle.net/10044/1/31098
DOI: http://dx.doi.org/10.1016/j.ijhydene.2016.04.061
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/).
Sponsor/Funder: Engineering & Physical Science Research Council (E
Funder's Grant Number: Ref: YEP122
Keywords: Energy
09 Engineering
03 Chemical Sciences
Publication Status: Published
Appears in Collections:Faculty of Engineering
Earth Science and Engineering



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