Combined electrochemical and X-ray tomography study of the high temperature evolution of Nickel - Yttria Stabilized Zirconia solid oxide fuel cell anodes

David Kennouche; Yu Chen Karen Chen-Wiegart; Casey Riscoe; Jun Wang; Scott A. Barnett

doi:10.1016/j.jpowsour.2015.12.126

Combined electrochemical and X-ray tomography study of the high temperature evolution of Nickel - Yttria Stabilized Zirconia solid oxide fuel cell anodes

David Kennouche, Yu Chen Karen Chen-Wiegart, Casey Riscoe, Jun Wang, Scott A. Barnett^*

^*Corresponding author for this work

Materials Science and Engineering

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

63 Scopus citations

Abstract

Accelerated ageing of Ni-Yttria Stabilized Zirconia (YSZ) anode functional layers (AFLs) in solid oxide fuel cells (SOFCs) is carried out at 1000-1200°C, the resulting morphological changes are investigated using transmission X-ray microscopy (TXM), and properties are characterized using electrochemical impedance spectroscopy (EIS). Prior to ageing, the as prepared NiO-YSZ AFLs are reduced to Ni-YSZ and then aged at 1100°C for 100 h in order to eliminate early-stage morphological changes. Measured particle size and three phase boundary (TPB) density changes with ageing time and temperature are fit reasonably well using a power-law coarsening model. This model is also used in conjunction with an electrochemical model to predict changes in the anode charge-transfer polarization resistance. The models are used to make predictions of the structural and electrochemical performance evolution of these Ni-YSZ anodes, for cells operated long-term at normal (700-850°C) operating temperatures. Additional experiments to verify the model predictions are suggested.

Original language	English (US)
Pages (from-to)	604-612
Number of pages	9
Journal	Journal of Power Sources
Volume	307
DOIs	https://doi.org/10.1016/j.jpowsour.2015.12.126
State	Published - Mar 1 2016

Funding

The authors gratefully acknowledge financial support from the Global Climate and Energy Project at Stanford University Project under award 51922 and the National Science Foundation under grant numbers DMR-0907639 and DMR-1506925 . Use of the National Synchrotron Light Source, Brookhaven National Laboratory, was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences , under Contract No. DE-AC02-98CH10886 .

Keywords

Anode
Model
Polarization resistance
Solid oxide fuel cell
Temperature evolution
Three phase boundaries

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jpowsour.2015.12.126

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title = "Combined electrochemical and X-ray tomography study of the high temperature evolution of Nickel - Yttria Stabilized Zirconia solid oxide fuel cell anodes",

abstract = "Accelerated ageing of Ni-Yttria Stabilized Zirconia (YSZ) anode functional layers (AFLs) in solid oxide fuel cells (SOFCs) is carried out at 1000-1200°C, the resulting morphological changes are investigated using transmission X-ray microscopy (TXM), and properties are characterized using electrochemical impedance spectroscopy (EIS). Prior to ageing, the as prepared NiO-YSZ AFLs are reduced to Ni-YSZ and then aged at 1100°C for 100 h in order to eliminate early-stage morphological changes. Measured particle size and three phase boundary (TPB) density changes with ageing time and temperature are fit reasonably well using a power-law coarsening model. This model is also used in conjunction with an electrochemical model to predict changes in the anode charge-transfer polarization resistance. The models are used to make predictions of the structural and electrochemical performance evolution of these Ni-YSZ anodes, for cells operated long-term at normal (700-850°C) operating temperatures. Additional experiments to verify the model predictions are suggested.",

keywords = "Anode, Model, Polarization resistance, Solid oxide fuel cell, Temperature evolution, Three phase boundaries",

author = "David Kennouche and Chen-Wiegart, {Yu Chen Karen} and Casey Riscoe and Jun Wang and Barnett, {Scott A.}",

year = "2016",

month = mar,

day = "1",

doi = "10.1016/j.jpowsour.2015.12.126",

language = "English (US)",

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pages = "604--612",

journal = "Journal of Power Sources",

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AU - Kennouche, David

AU - Chen-Wiegart, Yu Chen Karen

AU - Riscoe, Casey

AU - Wang, Jun

AU - Barnett, Scott A.

PY - 2016/3/1

Y1 - 2016/3/1

N2 - Accelerated ageing of Ni-Yttria Stabilized Zirconia (YSZ) anode functional layers (AFLs) in solid oxide fuel cells (SOFCs) is carried out at 1000-1200°C, the resulting morphological changes are investigated using transmission X-ray microscopy (TXM), and properties are characterized using electrochemical impedance spectroscopy (EIS). Prior to ageing, the as prepared NiO-YSZ AFLs are reduced to Ni-YSZ and then aged at 1100°C for 100 h in order to eliminate early-stage morphological changes. Measured particle size and three phase boundary (TPB) density changes with ageing time and temperature are fit reasonably well using a power-law coarsening model. This model is also used in conjunction with an electrochemical model to predict changes in the anode charge-transfer polarization resistance. The models are used to make predictions of the structural and electrochemical performance evolution of these Ni-YSZ anodes, for cells operated long-term at normal (700-850°C) operating temperatures. Additional experiments to verify the model predictions are suggested.

AB - Accelerated ageing of Ni-Yttria Stabilized Zirconia (YSZ) anode functional layers (AFLs) in solid oxide fuel cells (SOFCs) is carried out at 1000-1200°C, the resulting morphological changes are investigated using transmission X-ray microscopy (TXM), and properties are characterized using electrochemical impedance spectroscopy (EIS). Prior to ageing, the as prepared NiO-YSZ AFLs are reduced to Ni-YSZ and then aged at 1100°C for 100 h in order to eliminate early-stage morphological changes. Measured particle size and three phase boundary (TPB) density changes with ageing time and temperature are fit reasonably well using a power-law coarsening model. This model is also used in conjunction with an electrochemical model to predict changes in the anode charge-transfer polarization resistance. The models are used to make predictions of the structural and electrochemical performance evolution of these Ni-YSZ anodes, for cells operated long-term at normal (700-850°C) operating temperatures. Additional experiments to verify the model predictions are suggested.

KW - Anode

KW - Model

KW - Polarization resistance

KW - Solid oxide fuel cell

KW - Temperature evolution

KW - Three phase boundaries

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Combined electrochemical and X-ray tomography study of the high temperature evolution of Nickel - Yttria Stabilized Zirconia solid oxide fuel cell anodes

Abstract

Funding

Keywords

ASJC Scopus subject areas

UN SDGs

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