Metal Support Penetration Space Optimization for SOFC
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Solution Overview
Problem
Conventional metal-supported solid oxide fuel cells (SOFCs) face challenges in achieving optimal hole shape for the metal support, which affects workability, cost of mass production, and performance due to the thinness of the metal foil used, leading to low strength and difficulties in handling and production.
Innovation Solution
A metal support with a plate shape and penetration spaces that have specific dimensions and shapes for the front and back openings, allowing sufficient fuel gas supply to the electrode layer while maintaining strength and reducing processing costs, is developed. The metal support is made of a Fe-Cr alloy with a metal oxide film to prevent diffusion and enhance durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a thin metal foil is used for the metal support, then the gas supply performance is improved, but the strength and workability deteriorate
Solution Approach 1:
The invention changes the geometric parameters of the penetration spaces, specifically setting the front-side opening area to 3.0×10^-4 mm² or more and 3.0×10^-3 mm² or less, and the thickness ratio to 0.5 or more. This allows sufficient gas supply while maintaining structural strength without requiring thinner metal foil.
2Ease of manufacture
If the metal foil thickness is reduced to improve gas supply, then the processing cost is reduced, but the handling difficulty increases
Solution Approach 1:
By optimizing the penetration space parameters (front-side opening area and thickness ratio) rather than simply reducing metal foil thickness, the invention achieves cost reduction through efficient material usage while maintaining handling ease through sufficient structural strength.
3Quantity of substance
If the front-side opening area is increased to improve gas supply, then the performance is improved, but the strength is reduced
Solution Approach 1:
The invention identifies the optimal range for front-side opening area (3.0×10^-4 mm² to 3.0×10^-3 mm²) and combines it with an appropriate thickness ratio (0.5 or more), achieving sufficient fuel gas supply while maintaining metal support strength through balanced parameter selection.
4Productivity
If the penetration spaces are made larger to improve gas supply, then the performance is improved, but the processing difficulty increases
Solution Approach 1:
The invention optimizes the penetration space dimensions to achieve an balance between gas supply performance and manufacturability, with the front-side opening area constrained to 3.0×10^-4 mm² to 3.0×10^-3 mm², ensuring both high productivity and ease of processing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution ensures improved strength, performance, and cost-effectiveness of the electrochemical element by optimizing the metal support's design, allowing for efficient gas supply and reducing material costs, while maintaining the structural integrity and durability of the SOFC.
Implementation Method 1
the metal support is made of a Fe-Cr alloy with a metal oxide film to prevent diffusion and enhance durability
Data Source
AI summary
A metal support for an electrochemical element has a plate shape as a whole, and is provided with a plurality of penetration spaces that pass through the metal support from a front face to a back face. The front face is a face to be provided with an electrode layer. Each of front-side openings that are openings of the penetration spaces formed in the front face has an area of 3.0×10−4 mm2 or more and 3.0×10−3 mm2 or less.