The Predicted Effects of Anode Microstructure on SOFC Overpotentials

2019 ◽  
Vol 11 (33) ◽  
pp. 37-51
Author(s):  
Steven DeCaluwe ◽  
Huayang Zhu ◽  
Gregory S. Jackson
Keyword(s):  
Anode Microstructure

Development of a Geometrical Model for Optimizing Porous Anode Microstructure of Solid Oxide Fuel Cells

2008 ◽  
Vol 41 (4) ◽  
pp. 246-253 ◽  
Author(s):  
Hidetoshi Mori ◽  
Noboru Nonaka ◽  
Mitsukuni Mizuno ◽  
Hiroya Abe ◽  
Makio Naito
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Geometrical Model ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Anode Microstructure ◽  
Porous Anode

Quantification of Ni-YSZ Anode Microstructure Based on Dual Beam FIB-SEM Technique

2019 ◽  
Vol 25 (2) ◽  
pp. 1819-1828 ◽  
Author(s):  
Hiroshi Iwai ◽  
Naoki Shikazono ◽  
Toshiaki Matsui ◽  
Hisanori Teshima ◽  
Masashi Kishimoto ◽  
...  
Keyword(s):  
Dual Beam ◽  
Anode Microstructure

Microstructure degradation of Ni/CGO anodes for solid oxide fuel cells after long operation time using 3D reconstructions by FIB tomography

2017 ◽  
Vol 19 (21) ◽  
pp. 13767-13777 ◽  
Author(s):  
Atef Zekri ◽  
Martin Knipper ◽  
Jürgen Parisi ◽  
Thorsten Plaggenborg
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Operation Time ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
3D Reconstructions ◽  
Anode Microstructure ◽  
Sofc Anode ◽  
Long Operation

The 3D reconstructions of SOFC anode microstructure aged up to 20 000 h under realistic conditions was carried out with FIB/SEM tomography in order to calculate the microstructure key parameters.

Microstructural Control of Composite Anode for Anode Supported Intermediate Temperature Solid Oxide Fuel Cells

2006 ◽  
Vol 45 ◽  
pp. 1869-1874
Author(s):  
Kazuyoshi Sato ◽  
Masayasu Uemura ◽  
Akira Kondo ◽  
Hiroya Abe ◽  
Makio Naito ◽  
...  
Keyword(s):  
Power Density ◽  
Powder Mixture ◽  
Mechanical Milling ◽  
Composite Layer ◽  
Milled Powder ◽  
Powder Materials ◽  
Ceramic Processing ◽  
Operation Temperature ◽  
Anode Microstructure ◽  
And Performance

Appropriate mechanical milling in dry ambient can improve the mixing state of two powder materials as well as produce their composite particles. In this study the influences of milling on microstructure and performance of anode supported SOFCs was investigated. First, NiO and YSZ powder mixture was milled using an attrition type apparatus for 5 and 30 min. The SOFCs were made through conventional ceramic processing with the milled powder mixtures. The different milling time brought to significant change in power density of the SOFCs. When the powder mixture milled for 5 min was applied, maximum power density of the cell was 0.44 W·cm-2 at 800 °C. Contrarily, 0.75 W·cm-2 was obtained at the same operation temperature when the powder mixture milled for 30min was applied. Structural analysis revealed that the different power density was strongly related to the different anode microstructure. Prolonged milling resulted in homogeneous porous composite layer with fine Ni and YSZ grains, indicating larger triple phase boundary (TPB). It was demonstrated that the appropriate mechanical milling followed by ceramic processing improves the microstructure, and therefore enhances electrochemical activity of the anode.

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