Stamped Gas Diffusion Layer With Projections for Lower-Cost PEM Cells
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current gas diffusion layers for electrochemical cells, particularly in PEM electrolysis cells, are costly and complex to produce, limiting their scalability and economic viability for high-performance applications, such as aviation, due to the need for expensive materials and complex thermal treatments.
Innovation Solution
A gas diffusion layer comprising a metal unit with a defined thickness and multiple projections perpendicular to its surface, where at least one opening is present on the side or top surface of the projections, allowing for efficient gas transport and reduced production costs through stamping or embossing processes, which can also form a spring component with a degressive spring characteristic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sintered sheets with graduated surface are used for gas diffusion layer, then gas diffusion performance is improved, but production cost and manufacturing complexity increase significantly
Solution Approach 1:
The patent employs a porous metal foam structure as the gas diffusion layer, utilizing the inherent porous nature of metal foam materials to achieve effective gas diffusion without requiring complex sintering processes or graduated surfaces. The porous structure provides sufficient surface area and pathways for gas transport while maintaining mechanical integrity.
Solution Approach 2:
The invention changes the fundamental material parameter from sintered powder compact to metal foam with controlled porosity. By adjusting the porosity and pore size distribution of the metal foam during fabrication, optimal gas diffusion performance is achieved without subsequent thermal treatments or surface modifications.
2Manufacturing precision
If complex thermal treatment is applied to produce suitable gas diffusion layer, then material properties are optimized, but production time and cost increase
Solution Approach 1:
The desired porous structure and material properties are built into the metal foam during the initial fabrication process rather than requiring subsequent thermal treatments. The metal foam is pre-formed with controlled porosity, pore size, and structural characteristics that meet the gas diffusion requirements, eliminating the need for time-consuming sintering or heat treatment steps.
3Reliability
If conventional gas diffusion layer structures are used, then electrochemical cell performance is maintained, but purchase price per kilowatt remains high
Solution Approach 1:
The patent replaces expensive, difficult-to-manufacture sintered gas diffusion layers with more economical metal foam structures that can be produced at lower cost. The metal foam provides sufficient performance for the application while being more cost-effective, enabling economic viability for large-scale electrolysis cells particularly in high-performance sectors such as aviation.
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 design enables the production of a cost-effective and efficient gas diffusion layer that can be easily integrated into electrochemical cells, reducing production costs and enhancing their economic viability for high-performance applications by simplifying manufacturing processes and adjusting porosity and contact pressure.
Implementation Method 1
Gas diffusion layer for an electrochemical cell
Implementation Method 2
spring component with a degressive spring characteristic
Data Source
AI summary
The invention relates to a gas diffusion layer for an electrochemical cell, having a contacting unit and a metal unit which is arranged at or on the contacting unit. With respect to a main surface with a defined thickness (d), the metal unit has a plurality of projections which are substantially perpendicular to the main surface. At least one opening is formed on at least one side surface or top surface of the plurality of projections of the metal unit. Each elongation of the plurality of projections is at least three times the thickness (d) of the metal unit.