Metal-Substrate SOFC Structure for Lower-Cost Gas-Flow Integration
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Solution Overview
Problem
Conventional solid oxide fuel cells using ceramic support substrates face issues of high material and processing costs, increased size and weight, and difficulty in arranging multiple power generating bodies due to the fragility and expense of ceramic materials.
Innovation Solution
A metal substrate with through holes and insulating film is used to support electrochemical reaction portions, allowing gas flow and electrical connections, with layers formed at low temperatures to reduce material usage and enhance durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a ceramic support substrate is used, then the electrochemical element can be manufactured with conventional processes, but the material cost and processing cost increase significantly
Solution Approach 1:
The invention changes the material parameter from ceramic to metal substrate, fundamentally altering the cost structure while maintaining manufacturability through established metal processing techniques
Solution Approach 2:
The metal substrate provides a cost-effective alternative to expensive ceramic substrates, reducing material cost while maintaining sufficient durability for the application
2Ease of manufacture
If a ceramic support substrate is used, then the electrochemical element can be manufactured, but the size and weight increase considerably
Solution Approach 1:
Changing from ceramic to metal substrate material fundamentally alters the weight parameter, providing a lighter alternative while maintaining structural integrity
Solution Approach 2:
The substrate is designed with through-holes creating a segmented structure that reduces weight while maintaining mechanical strength and enabling gas flow functionality
3Ease of manufacture
If a ceramic support substrate is used, then the electrochemical element can be manufactured, but fine processing becomes difficult and processing cost rises
Solution Approach 1:
Changing the substrate material from ceramic to metal enables better fine processing capabilities through established metalworking techniques, allowing precise formation of through-holes and electrode patterns
Solution Approach 2:
The invention replaces ceramic processing mechanisms with metal processing mechanisms, utilizing techniques like laser drilling, plasma processing, and electrochemical etching that offer superior precision and controllability
4Power
If multiple power generating bodies are arranged side-by-side on a single support substrate, then the power output increases, but the complexity of arranging and processing increases
Solution Approach 1:
The substrate is divided into multiple regions with through-holes positioned to serve multiple electrochemical reaction portions simultaneously, enabling modular arrangement of power generating bodies
Solution Approach 2:
The through-holes in the metal substrate serve multiple functions: providing mechanical support, enabling gas flow distribution, and facilitating electrical connections to multiple electrochemical reaction portions, thereby simplifying the overall device complexity
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 metal substrate configuration reduces costs and processing complexity while maintaining high performance and strength, enabling compact and reliable electrochemical elements.
Implementation Method 1
the metal substrate 1 has through holes 2 that allow a gas to flow from an upper side 4 to a lower side 5
Implementation Method 2
an insulating film 3 that is formed on an upper surface of the metal substrate 1
Implementation Method 3
multiple electrochemical reaction portions R that have an electrode layer A, an electrolyte layer B, and a counter electrode layer C
Data Source
Figure 1
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Figure 3
AI summary
An electrochemical element (Q) has a metal substrate (1) and multiple electrochemical reaction portions. The metal substrate (1) has gas flow allowing regions that allow the flowing of a gas between the upper side (4) and the lower side (5) of the metal substrate (1). The electrochemical reaction portions each have at least an electrode layer (A), an electrolyte layer (B), and a counter electrode layer (C), and are arranged on the upper side (4) of the metal substrate (1). The electrolyte layer (B) is arranged between the electrode layer (A) and the counter electrode layer (C), and the gas flowing through the gas flow allowing regions is supplied to the electrode layer (A).