Electrochemical and microstructural properties of Ni-(Y2O3)0.08(ZrO2)0.92-(Ce0.9Gd0.1)O1.95 anode-supported microtubular solid oxide fuel cells

Hirofumi Sumi; David Kennouche; Kyle Yakal-Kremski; Toshio Suzuki; Scott A. Barnett; Dean J. Miller; Toshiaki Yamaguchi; Koichi Hamamoto; Yoshinobu Fujishiro

doi:10.1016/j.ssi.2015.07.005

Electrochemical and microstructural properties of Ni-(Y₂O₃)_0.08(ZrO₂)_0.92-(Ce_0.9Gd_0.1)O_1.95 anode-supported microtubular solid oxide fuel cells

Hirofumi Sumi^*, David Kennouche, Kyle Yakal-Kremski, Toshio Suzuki, Scott A. Barnett, Dean J. Miller, Toshiaki Yamaguchi, Koichi Hamamoto, Yoshinobu Fujishiro

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

The nickel-zirconia cermet is widely used as an anode of solid oxide fuel cells (SOFCs). On the other hand, the nickel-ceria based anode indicates high electrochemical activity for hydrogen oxidation and hydrocarbon reforming. In this study, electrochemical and microstructural properties of microtubular SOFCs with Ni-based composite anodes containing yttria-stabilized zirconia (YSZ) and gadolinia-doped ceria (GDC) are investigated electrochemically using impedance spectroscopy (EIS) and microstructurally using focused ion beam-scanning electron microscopy (FIB-SEM). The solid solution of YSZ and GDC was easily formed after mechanical mixing and sintering at 1400 °C. The electrical conductivity and mechanical strength for the Ni-YSZGDC composite anodes are low relative to Ni-YSZ due to poor sinterability. The GDC-containing anodes show improved electrochemical activity for hydrogen oxidation, despite having lower three-phase boundary densities. Distribution of relaxation times (DRT) analysis of the EIS data shows that the concentration polarization is lower for the Ni-GDC anode, due to a higher measured pore volume. The maximum power density for the cell with the Ni-YSZGDC composite anode was higher than those with the Ni-YSZ and Ni-GDC anodes.

Original language	English (US)
Pages (from-to)	227-233
Number of pages	7
Journal	Solid State Ionics
Volume	285
DOIs	https://doi.org/10.1016/j.ssi.2015.07.005
State	Published - Feb 1 2016

Funding

This work was supported in part by the Ministry of Economy, Trade and Industry , under the Japan–U.S. Cooperation Project for Research and Standardization of Clean Energy Technologies. The authors acknowledge financial support from the Global Climate and Energy Project at Stanford University under award 51922 and the National Science Foundation under grant number DMR-0907639 . The FIB-SEM electron microscopy was accomplished at the Electron Microscopy Center at Argonne National Laboratory, a U.S. Department of Energy Office of Science Laboratory operated under contract no. DE-AC02-06CH11357 by UChicago Argonne, LLC.

Keywords

AC impedance
Anode microstructure
Distribution of relaxation time (DRT)
Focused ion beam-scanning electron microscopy (FIB-SEM)
Zirconia-ceria solid solution

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

Access to Document

10.1016/j.ssi.2015.07.005

Cite this

@article{073932dd2647419481f5d64517067cbe,

title = "Electrochemical and microstructural properties of Ni-(Y2O3)0.08(ZrO2)0.92-(Ce0.9Gd0.1)O1.95 anode-supported microtubular solid oxide fuel cells",

abstract = "The nickel-zirconia cermet is widely used as an anode of solid oxide fuel cells (SOFCs). On the other hand, the nickel-ceria based anode indicates high electrochemical activity for hydrogen oxidation and hydrocarbon reforming. In this study, electrochemical and microstructural properties of microtubular SOFCs with Ni-based composite anodes containing yttria-stabilized zirconia (YSZ) and gadolinia-doped ceria (GDC) are investigated electrochemically using impedance spectroscopy (EIS) and microstructurally using focused ion beam-scanning electron microscopy (FIB-SEM). The solid solution of YSZ and GDC was easily formed after mechanical mixing and sintering at 1400 °C. The electrical conductivity and mechanical strength for the Ni-YSZGDC composite anodes are low relative to Ni-YSZ due to poor sinterability. The GDC-containing anodes show improved electrochemical activity for hydrogen oxidation, despite having lower three-phase boundary densities. Distribution of relaxation times (DRT) analysis of the EIS data shows that the concentration polarization is lower for the Ni-GDC anode, due to a higher measured pore volume. The maximum power density for the cell with the Ni-YSZGDC composite anode was higher than those with the Ni-YSZ and Ni-GDC anodes.",

keywords = "AC impedance, Anode microstructure, Distribution of relaxation time (DRT), Focused ion beam-scanning electron microscopy (FIB-SEM), Zirconia-ceria solid solution",

author = "Hirofumi Sumi and David Kennouche and Kyle Yakal-Kremski and Toshio Suzuki and Barnett, {Scott A.} and Miller, {Dean J.} and Toshiaki Yamaguchi and Koichi Hamamoto and Yoshinobu Fujishiro",

year = "2016",

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doi = "10.1016/j.ssi.2015.07.005",

language = "English (US)",

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T1 - Electrochemical and microstructural properties of Ni-(Y2O3)0.08(ZrO2)0.92-(Ce0.9Gd0.1)O1.95 anode-supported microtubular solid oxide fuel cells

AU - Sumi, Hirofumi

AU - Kennouche, David

AU - Yakal-Kremski, Kyle

AU - Suzuki, Toshio

AU - Barnett, Scott A.

AU - Miller, Dean J.

AU - Yamaguchi, Toshiaki

AU - Hamamoto, Koichi

AU - Fujishiro, Yoshinobu

PY - 2016/2/1

Y1 - 2016/2/1

N2 - The nickel-zirconia cermet is widely used as an anode of solid oxide fuel cells (SOFCs). On the other hand, the nickel-ceria based anode indicates high electrochemical activity for hydrogen oxidation and hydrocarbon reforming. In this study, electrochemical and microstructural properties of microtubular SOFCs with Ni-based composite anodes containing yttria-stabilized zirconia (YSZ) and gadolinia-doped ceria (GDC) are investigated electrochemically using impedance spectroscopy (EIS) and microstructurally using focused ion beam-scanning electron microscopy (FIB-SEM). The solid solution of YSZ and GDC was easily formed after mechanical mixing and sintering at 1400 °C. The electrical conductivity and mechanical strength for the Ni-YSZGDC composite anodes are low relative to Ni-YSZ due to poor sinterability. The GDC-containing anodes show improved electrochemical activity for hydrogen oxidation, despite having lower three-phase boundary densities. Distribution of relaxation times (DRT) analysis of the EIS data shows that the concentration polarization is lower for the Ni-GDC anode, due to a higher measured pore volume. The maximum power density for the cell with the Ni-YSZGDC composite anode was higher than those with the Ni-YSZ and Ni-GDC anodes.

AB - The nickel-zirconia cermet is widely used as an anode of solid oxide fuel cells (SOFCs). On the other hand, the nickel-ceria based anode indicates high electrochemical activity for hydrogen oxidation and hydrocarbon reforming. In this study, electrochemical and microstructural properties of microtubular SOFCs with Ni-based composite anodes containing yttria-stabilized zirconia (YSZ) and gadolinia-doped ceria (GDC) are investigated electrochemically using impedance spectroscopy (EIS) and microstructurally using focused ion beam-scanning electron microscopy (FIB-SEM). The solid solution of YSZ and GDC was easily formed after mechanical mixing and sintering at 1400 °C. The electrical conductivity and mechanical strength for the Ni-YSZGDC composite anodes are low relative to Ni-YSZ due to poor sinterability. The GDC-containing anodes show improved electrochemical activity for hydrogen oxidation, despite having lower three-phase boundary densities. Distribution of relaxation times (DRT) analysis of the EIS data shows that the concentration polarization is lower for the Ni-GDC anode, due to a higher measured pore volume. The maximum power density for the cell with the Ni-YSZGDC composite anode was higher than those with the Ni-YSZ and Ni-GDC anodes.

KW - AC impedance

KW - Anode microstructure

KW - Distribution of relaxation time (DRT)

KW - Focused ion beam-scanning electron microscopy (FIB-SEM)

KW - Zirconia-ceria solid solution

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