Material characterization in support of the development of an anode substrate for solid oxide fuel cells

A new design for solid oxide fuel cells (SOFC's) was developed aiming at the reduction of the total electrical resistance of the cell. The thickness of the electrolyte was decreased, while the anode took on the role of the substrate. The pore structure with respect to gas permeability of this component has to be optimized for the proper operation of this design. Anode substrates, consisting of a cermet (yttrium-stabilized ZrO2 and metallic Ni) and produced by two different processes, coat mix and tape casting, were characterized with respect to pore structure (shape and mean radius), porosity (total, open and permeable), pore size distribution and air permeability. The following methods were used: (i) optical and electron scanning microscopy in combination with image analysis, (ii) mercury porosity, and (iii) air permeability. Correlations between air permeability and porosity and also the percentage of permeable pores in anodes show the superiority of coat mix samples to tape-cast ones. It has been observed that the coat mix process can produce anode substrates with interconnecting porosity, while tape casting, as used in this study, needs some modifications in order to be appropriate for this purpose.

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Large gas permeability nickel/alumina substrates with hierarchical pore structure for solid oxide fuel cells derived from particle-stabilized emulsions

Journal of Power Sources ◽

10.1016/j.jpowsour.2015.03.128 ◽

2015 ◽

Vol 285 ◽

pp. 400-405 ◽

Cited By ~ 3

Author(s):

Xiang Wang ◽

Jin-hong Li ◽

Li-jie Liu ◽

Hong-yao Zhang

Keyword(s):

Fuel Cells ◽

Solid Oxide Fuel Cells ◽

Pore Structure ◽

Gas Permeability ◽

Solid Oxide ◽

Oxide Fuel ◽

Hierarchical Pore Structure ◽

Hierarchical Pore

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Al2O3 toughening ScSZ electrolyte fabricated by water-based tape casting technique for solid oxide fuel cells

Journal of Electrochemical Energy Conversion and Storage ◽

10.1115/1.4052313 ◽

2021 ◽

pp. 1-17

Author(s):

Haoran Wang ◽

Ze Lei ◽

Han Zhang ◽

Yongkang Li ◽

Junmeng Jing ◽

...

Keyword(s):

Fuel Cells ◽

Solid Oxide Fuel Cells ◽

Bending Strength ◽

Tape Casting ◽

Solid Oxide ◽

Electrical Performance ◽

Oxide Fuel ◽

Casting Technique ◽

Electrolyte Film ◽

Water Based

Abstract A water-based tape casting slurry is reported to prepare the ceria and scandia co-doped zirconia (ScSZ) electrolyte films. The slurry is characterized and optimized through Zeta potential and rheological property measurements. Smooth and flat ScSZ electrolyte films are obtained by improving the sintering process. The microstructure, electrical performance, and mechanical property of ScSZ with adding different contents of Al2O3 are also investigated. The results show that a proper amount of Al2O3 has a beneficial effect on the densification of ScSZ. Significant decrease at the grain boundary resistance of ScSZ is observed by Al2O3 addition. The bending strength of the sample with 0.5 wt.% Al2O3 (ScSZ-0.5A) is about 400 MPa, which is 20% higher than pure ScSZ. The ScSZ-0.5A electrolyte film fabricated by water-based tape casting method shows appropriate electrical conductivity and high mechanical strength, which is promising for the practical application in solid oxide fuel cells (SOFCs).

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A study of short stack with large area solid oxide fuel cells by aqueous tape casting

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2016.08.094 ◽

2016 ◽

Vol 41 (40) ◽

pp. 18203-18206 ◽

Cited By ~ 5

Author(s):

Juan Zhou ◽

Qinglin Liu ◽

Lan Zhang ◽

Siew Hwa Chan

Keyword(s):

Fuel Cells ◽

Solid Oxide Fuel Cells ◽

Tape Casting ◽

Solid Oxide ◽

Oxide Fuel ◽

Large Area

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Manufacturing of Solid Oxide Fuel Cells by Aqueous Tape Casting

Proceedings of the 10th International Conference on Multi-Material Micro Manufacture ◽

10.3850/978-981-07-7247-5-370 ◽

2013 ◽

Author(s):

J. Stiernstedt ◽

E. Carlström ◽

B.-E. Mellander

Keyword(s):

Fuel Cells ◽

Solid Oxide Fuel Cells ◽

Tape Casting ◽

Solid Oxide ◽

Oxide Fuel

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Influence of Thermal Treatment During Cell Manufacturing on the Performance of Tape Cast Solid Oxide Fuel Cells

ECS Meeting Abstracts ◽

10.1149/ma2009-02/12/1526 ◽

2009 ◽

Keyword(s):

Fuel Cells ◽

Thermal Treatment ◽

Solid Oxide Fuel Cells ◽

Solid Oxide ◽

Oxide Fuel ◽

Cell Manufacturing ◽

Tape Cast

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Fabrication and Characterization of Graded Anodes for Anode-Supported Solid Oxide Fuel Cells by Tape Casting and Lamination

Electrocatalysis ◽

10.1007/s12678-014-0193-2 ◽

2014 ◽

Vol 5 (3) ◽

pp. 273-278 ◽

Cited By ~ 5

Author(s):

J. F. Beltran-Lopez ◽

M. A. Laguna-Bercero ◽

J. Gurauskis ◽

J. I. Peña

Keyword(s):

Fuel Cells ◽

Solid Oxide Fuel Cells ◽

Tape Casting ◽

Solid Oxide ◽

Oxide Fuel ◽

Fabrication And Characterization

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Fabrication of the Anode Supported Solid Oxide Fuel Cells by Tape-Casting Process and Infiltration Method

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.783.79 ◽

2018 ◽

Vol 783 ◽

pp. 79-87 ◽

Cited By ~ 1

Author(s):

Young Jin Kwon ◽

Young Bae Han

Keyword(s):

Fuel Cells ◽

Carbon Black ◽

Electrochemical Performance ◽

Solid Oxide Fuel Cells ◽

Glassy Carbon ◽

Tape Casting ◽

Casting Process ◽

Solid Oxide ◽

Oxide Fuel ◽

Infiltration Method

The hydrogen is promising energy carrier due to its high energy density, convenient transportation, eternal sources in the earth and cleanness. Solid oxide fuel cells (SOFCs) have not been commercialized yet even though it has been studied for decades. The issues about solid oxide fuel cells are manufacturing process and electrochemical performance. Tape-casting process has an advantage of cost reduction for mass production. it is reported that infiltration improves electrochemical performance of SOFCs by enhancing the three phase boundary (TPB) and porosity. To fabricate the electrode with porous scaffold structure for infiltration, pore formers were added in the tape-casting slurry. In this study, four types of mixtures of several pore formers such as carbon black, graphite, poly methyl methacrylate and glassy carbon were estimated. Micro structure of each type is investigated through scanning electron microscope (SEM). The thickness of the unit cell manufactured by tape-casting is in the range of 200 - 250 μm. The fabricated unit cell with carbon black and glassy carbon shows the open circuit voltage 1.07 V at 800°C. As a result of the study, mixed ratio of pore formers was researched for Solid Oxide Fuel Cells manufacturing process applied by tape-casting and infiltration method.

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