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Title: Effect of Aluminum Titanate (Al 2 TiO 5 ) Doping on the Mechanical Performance of Solid Oxide Fuel Cell Ni-YSZ Anode

 [1];  [1]
  1. Montana State University, Mechanical Engineering, 220 Roberts Hall 59717 Bozeman, MT USA
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Journal Article: Publisher's Accepted Manuscript
Journal Name:
Fuel Cells
Additional Journal Information:
Journal Volume: 17; Journal Issue: 6; Related Information: CHORUS Timestamp: 2017-12-14 09:46:03; Journal ID: ISSN 1615-6846
Wiley Blackwell (John Wiley & Sons)
Country of Publication:

Citation Formats

McCleary, M., and Amendola, R. Effect of Aluminum Titanate (Al 2 TiO 5 ) Doping on the Mechanical Performance of Solid Oxide Fuel Cell Ni-YSZ Anode. Germany: N. p., 2017. Web. doi:10.1002/fuce.201700073.
McCleary, M., & Amendola, R. Effect of Aluminum Titanate (Al 2 TiO 5 ) Doping on the Mechanical Performance of Solid Oxide Fuel Cell Ni-YSZ Anode. Germany. doi:10.1002/fuce.201700073.
McCleary, M., and Amendola, R. 2017. "Effect of Aluminum Titanate (Al 2 TiO 5 ) Doping on the Mechanical Performance of Solid Oxide Fuel Cell Ni-YSZ Anode". Germany. doi:10.1002/fuce.201700073.
title = {Effect of Aluminum Titanate (Al 2 TiO 5 ) Doping on the Mechanical Performance of Solid Oxide Fuel Cell Ni-YSZ Anode},
author = {McCleary, M. and Amendola, R.},
abstractNote = {},
doi = {10.1002/fuce.201700073},
journal = {Fuel Cells},
number = 6,
volume = 17,
place = {Germany},
year = 2017,
month =

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on October 9, 2018
Publisher's Accepted Manuscript

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  • The interfacial resistance of Ni-Y{sub 2}O{sub 3}-stabilized ZrO{sub 2} (Ni-YSZ) anodes on YSZ electrolytes has been reduced by inserting thin interfacial layers of TiO{sub 2}-doped YSZ (YZT) or Y{sub 2}O{sub 3}-doped CeO{sub 2} (YDC). Impedance spectroscopy measurements at temperatures ranging from 600 to 750 C typically showed a high frequency arc (HFA) and a low frequency arc (LFA). The HFA was reduced by the addition of either interlayer, with a larger reduction for YDC. This presumably resulted from enhanced charge transfer due to the mixed conductivity and/or enhanced redox reaction rate of the interfacial layer. The LFA, which was apparentlymore » related to mass-transport processes, grew with decreasing YSZ surface roughness and increasing interlayer thickness. The overall interfacial resistance was minimized for layer thicknesses of {approximately} 0.5 {micro}m. The lowest interfacial resistances in 97% H{sub 2} + H{sub 2}O, 0.13 {Omega} cm{sup 2} at 750 C, and 0.29 {Omega}cm{sup 2} at 600 C, were obtained with 0.5 {micro}m thick YDC interfacial layers.« less
  • Solid Oxide Fuel Cells (SOFCs) operate under harsh environments, which cause deterioration of anode material properties and service life. In addition to electrochemical performance, structural integrity of the SOFC anode is essential for successful long-term operation. The SOFC anode is subjected to stresses at high temperature, thermal/redox cycles, and fuel gas contaminants effects during long-term operation. These mechanisms can alter the anode microstructure and affect its electrochemical and structural properties. In this research, anode material degradation mechanisms are briefly reviewed and an anode material durability model is developed and implemented in finite element analysis. The model takes into account thermo-mechanicalmore » and fuel gas contaminants degradation mechanisms for prediction of long-term structural integrity of the SOFC anode. The proposed model is validated experimentally using a NexTech ProbostatTM SOFC button cell test apparatus integrated with a Sagnac optical setup for simultaneously measuring electrochemical performance and in-situ anode surface deformation.« less
  • A Solid Oxide Fuel Cell with a Gadolinia-Doped Ceria Anode: Preparation and Performance
  • Anode-supported yttria stabilized zirconia (YSZ)/samaria doped ceria (SDC) bi-layer electrolytes with uniform thickness and high density were fabricated by pulsed laser deposition at 1000 degrees C. Fuel cells with such bi-layer electrolytes were fabricated and tested, yielding open circuit voltages from 0.94 to 1.0 V at 600-700 degrees C. Power densities from 0.4 to 1.0 W cm{sup -2} at 0.7 V were achieved in air at temperatures of 600-700 degrees C. Cell performance was improved in flowing oxygen, with an estimated peak power density of over 2 W cm{sup -2} at 650 degrees C, assuming the same overall resistance overmore » the entire range of current density. The high cell performance was attributed to the very low ohmic resistance of the fuel cell, owing to the small thickness of the electrolyte. Stable performance was also demonstrated in that the voltage of the fuel cell showed very little change at a constant current density of 1 A cm{sup -2} during more than 400 hours of operation at 650 degrees C in flowing oxygen. SEM analysis of the fuel cell after testing showed that the bi-layer electrolyte had retained its chemical and mechanical integrity.« less
  • The effects of amount of pore former used to produce porosity in the anode of an anode supported planar solid oxide fuel cell were examined. The pore forming material utilized was rice starch. The reduction rate of the anode material was measured by Thermogravimetric Analysis (TGA) to qualitatively characterize the gas transport within the porous anode materials. Fuel cells with varying amounts of porosity produced by using rice starch as a pore former were tested. The performance of the fuel cell was the greatest with an optimum amount of pore former used to create porosity in the anode. This optimummore » is believed to be related to a trade off between increasing gas diffusion to the active three-phase boundary region of the anode and the loss of performance due to the replacement of active three-phase boundary regions of the anode with porosity.« less