Fuel Cell Intermediate Layer With Cr2O3 for Low-Resistance Collection
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Solution Overview
Problem
Existing fuel cell technologies face challenges in achieving high power generation efficiency and corrosion resistance due to the high electric resistance caused by chromium(III) oxide (Cr2O3) in the metal support body.
Innovation Solution
A cell design incorporating a metal plate with a first intermediate layer containing Cr2O3 and conductive particles, which enhances the durability and electrical conductivity, allowing for efficient electricity collection and improved power generation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Cr2O3 is present in the metal support body to enhance corrosion resistance, then corrosion resistance is improved, but electric resistance increases
Solution Approach 1:
The patent applies composite materials by combining Cr2O3 with conductive particles (such as metal particles or conductive ceramic particles) to form an intermediate layer. This composite structure allows the layer to simultaneously exhibit corrosion resistance from Cr2O3 and electrical conductivity from the conductive particles, resolving the contradiction between these two properties.
Solution Approach 2:
The patent applies local quality by creating an intermediate layer with specific local properties between the metal support body and the electrode layer. This intermediate layer has a differentiated composition (Cr2O3 plus conductive particles) that provides both corrosion resistance and electrical conductivity locally, while other parts of the cell maintain their respective functions.
2Duration of action of stationary object
If Cr2O3 is used in the intermediate layer to improve durability, then durability is enhanced, but power generation efficiency decreases due to high electric resistance
Solution Approach 1:
The intermediate layer uses composite materials combining Cr2O3 for durability and conductive particles for electrical conductivity. This composite approach ensures that the layer maintains long-term stability while minimizing electrical resistance losses, thereby preserving power generation efficiency over the cell's operational lifetime.
Solution Approach 2:
The patent applies parameter changes by adjusting the composition, thickness, and particle size distribution of the intermediate layer to optimize both durability and electrical conductivity. By controlling these parameters, the layer achieves a balance between long-term stability and efficient electricity collection.
3Reliability
If a metal plate containing Cr is used as support body to achieve high thermal resistance and corrosion resistance, then thermal resistance and corrosion resistance are improved, but electric resistance increases reducing power generation efficiency
Solution Approach 1:
The patent applies composite materials in the intermediate layer to compensate for the high electric resistance of the Cr-containing metal plate. The conductive particles in the intermediate layer create additional electrical conduction pathways, reducing overall resistance while the Cr in the metal plate maintains thermal and corrosion resistance.
Solution Approach 2:
The intermediate layer acts as an intermediary between the metal plate and the electrode layer. It mediates the electrical conduction issue by providing conductive particles that facilitate electron transport, while allowing the metal plate to maintain its protective functions of thermal resistance and corrosion resistance without directly contacting the electrode.
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 use of the first intermediate layer with Cr2O3 and conductive particles reduces the electric resistance, enhances corrosion resistance, and improves the overall power generation efficiency of the fuel cell.
Implementation Method 1
a first intermediate layer located between the first surface and the first electrode layer. The first intermediate layer contains Cr2O3 and a first conductive particle different from Cr2O3
Implementation Method 2
The first intermediate layer contains Cr2O3
Data Source
AI summary
A cell includes a metal plate including a first surface, and a second surface that faces the first surface, the metal plate containing Cr, an element portion disposed on the metal plate, the element portion including a first electrode layer, a solid electrolyte layer located on the first electrode layer, and a second electrode layer located on the solid electrolyte layer, and a first intermediate layer located between the first surface of the metal plate and the first electrode layer. The first intermediate layer contains Cr2O3 and a first electrically conductive particle different from Cr2O3.