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Title: Developing Cost-Effective Dense Continuous SDC Barrier Layers for SOFCs

Abstract

Significantly improved performance during electrochemical testing of a cell with a dense continuous pulsed laser deposited (PLD) samarium doped ceria (SDC) layer spurred investigations into the fabrication of dense continuous SDC barrier layers by means of cost-effective deposition using screen printing which is amenable to industrial production of SOFCs. Many approaches to improve the SDC density have been explored including the use of powder with reduced particle sizes, inks with increased solids loading, and doping with sintering aids (1). In terms of sintering aids, dopants like Mo or binary systems of Mo+Cu or Fe+Co greatly enhance SDC sinterability. In fact, adding dopants to a screen printed, prefired, porous SDC layer made it possible to achieve a dense continuous barrier layer atop the YSZ electrolyte without sintering above 1200°C. Although the objective of fabricating a dense continuous layer was achieved, additional studies have been initiated to improve the cell performance. Underlying issues with constrained sintering and dopant-enhanced ceria-zirconia solid solubility are also addressed in this paper.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1434883
Report Number(s):
PNNL-SA-131600
AA6040000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: ECS Transactions, 75(42):107-114
Country of Publication:
United States
Language:
English

Citation Formats

Nguyen, Hoang Viet P., Hardy, John S., Coyle, Christopher A., LU, Zigui, and Stevenson, Jeffry W.. Developing Cost-Effective Dense Continuous SDC Barrier Layers for SOFCs. United States: N. p., 2017. Web. doi:10.1149/07542.0107ecst.
Nguyen, Hoang Viet P., Hardy, John S., Coyle, Christopher A., LU, Zigui, & Stevenson, Jeffry W.. Developing Cost-Effective Dense Continuous SDC Barrier Layers for SOFCs. United States. doi:10.1149/07542.0107ecst.
Nguyen, Hoang Viet P., Hardy, John S., Coyle, Christopher A., LU, Zigui, and Stevenson, Jeffry W.. Mon . "Developing Cost-Effective Dense Continuous SDC Barrier Layers for SOFCs". United States. doi:10.1149/07542.0107ecst.
@article{osti_1434883,
title = {Developing Cost-Effective Dense Continuous SDC Barrier Layers for SOFCs},
author = {Nguyen, Hoang Viet P. and Hardy, John S. and Coyle, Christopher A. and LU, Zigui and Stevenson, Jeffry W.},
abstractNote = {Significantly improved performance during electrochemical testing of a cell with a dense continuous pulsed laser deposited (PLD) samarium doped ceria (SDC) layer spurred investigations into the fabrication of dense continuous SDC barrier layers by means of cost-effective deposition using screen printing which is amenable to industrial production of SOFCs. Many approaches to improve the SDC density have been explored including the use of powder with reduced particle sizes, inks with increased solids loading, and doping with sintering aids (1). In terms of sintering aids, dopants like Mo or binary systems of Mo+Cu or Fe+Co greatly enhance SDC sinterability. In fact, adding dopants to a screen printed, prefired, porous SDC layer made it possible to achieve a dense continuous barrier layer atop the YSZ electrolyte without sintering above 1200°C. Although the objective of fabricating a dense continuous layer was achieved, additional studies have been initiated to improve the cell performance. Underlying issues with constrained sintering and dopant-enhanced ceria-zirconia solid solubility are also addressed in this paper.},
doi = {10.1149/07542.0107ecst},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Dec 04 00:00:00 EST 2017},
month = {Mon Dec 04 00:00:00 EST 2017}
}

Conference:
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