Solid Oxide Fuel Cell Air Electrode Collector Design
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Solution Overview
Problem
Conventional solid oxide fuel battery cells face inefficiencies in oxygen gas collection and utilization, leading to suboptimal electricity generation due to uncontrolled air electrode collector part structures, which hinder the effective flow and retention of oxygen gas.
Innovation Solution
The design incorporates a classification of air electrode collector parts with distinct shapes and properties along the longitudinal direction, where the third end part protrudes outward and has a greater porosity and curvature, facilitating efficient oxygen gas collision and retention, and the fourth end part is positioned closer to the support substrate, optimizing gas flow and reaction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the air electrode collector part has a uniform structure, then the manufacturing process is simple, but the oxygen gas collection and utilization efficiency is low
Solution Approach 1:
The air electrode collector part is designed with spatially varying properties: the third end part has higher porosity and greater curvature radius to enhance oxygen gas collision and retention, while the fourth end part has lower porosity and smaller curvature radius for efficient gas flow. This local differentiation optimizes electricity generation efficiency without significantly complicating the manufacturing process.
2Productivity
If the third end part has high porosity and curvature, then oxygen gas retention is improved, but the structural complexity increases
Solution Approach 1:
The air electrode collector part is segmented into multiple regions (second end part, third end part, fourth end part) with distinct structural characteristics. The third end part specifically features high porosity and greater curvature radius for optimized oxygen gas retention, while other segments have different properties. This segmentation allows targeted optimization of gas retention without requiring complex structures throughout the entire collector part.
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
This configuration enhances the efficiency of electricity generation by prolonging the retention time of oxygen gas within the air electrode collector parts, thereby accelerating the electricity generation reaction and improving overall cell performance.
Implementation Method 1
the third end part on a side of the first end has a greater porosity... facilitating efficient oxygen gas collision and retention
Data Source
AI summary
A cell includes a support substrate, electricity generation element parts that are arrayed at locations on a principal face of the support substrate and include a fuel electrode, a solid electrolyte, and an air electrode, and electrical connection parts that are each provided between adjacent electricity generation element parts and electrically connect a fuel electrode of one of the electricity generation element parts and an air electrode of another of the electricity generation element parts, wherein an electrical connection part bridges over the adjacent electricity generation element parts and includes air electrode collector parts, and the air electrode collector parts include a first site on an electricity generation element part on a side of a first end, a second site on the electricity generation element part other than the third end part, and a third site on a side of a second end.