Compressible Conductive Mesh for Electrolyzer Fluid Distribution
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Solution Overview
Problem
Existing carbon oxide electrolyzers require intricate patterned channels on polar plates for fluid distribution, which increases manufacturing costs and complexity, and may not provide uniform compression across the electrodes.
Innovation Solution
The use of a compressible electrically conductive mesh that can be placed on the surface of the polar plates, providing a fluid path and electrical conductivity, eliminates the need for patterned channels and allows for uniform compression across the electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If patterned channels are etched into polar plates for fluid distribution, then fluid flow control is achieved, but manufacturing cost and complexity increase
Solution Approach 1:
The invention extracts the fluid distribution function from the polar plate structure itself and places it onto a separate compressible gasket. The gasket carries recesses that form flow channels, while the polar plate remains a simple flat structure. This separation eliminates the need for complex channel patterning in the polar plate, reducing manufacturing cost and simplifying production.
Solution Approach 2:
The compressible gasket acts as an intermediary component between the polar plate and the electrode assembly. It provides the fluid distribution function through its recessed channel structure while also providing compression and sealing. This intermediary component simplifies the polar plate design and reduces manufacturing complexity.
2Reliability
If high compression is applied to ensure catalyst contact with membrane, then catalytic performance improves, but non-uniform compression occurs with patterned channels
Solution Approach 1:
The compressible gasket provides locally adaptive compression through its compressible material properties. The gasket can be compressed uniformly across the entire active area, ensuring even pressure distribution on the catalyst and membrane interface. This local compliance ensures uniform compression without the non-uniformity caused by rigid patterned channels.
3Ease of operation
If patterned channels are used for fluid distribution, then fluid flow paths are defined, but compressive force distribution becomes non-uniform
Solution Approach 1:
The gasket is designed with segmented recesses that define fluid flow paths while allowing the bulk gasket material to provide uniform compression. The recesses are segmented into inlet and outlet channels, but the gasket itself remains a continuous compressible structure that distributes force uniformly across the active area.
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 solution reduces manufacturing costs, simplifies the production process, and ensures even distribution of compressive force across the electrodes, enhancing catalytic performance and maintaining sufficient control over pressure differentials.
Implementation Method 1
The compressible flow fields disclosed herein can be formed of electrically conductive compressible material
Implementation Method 2
the compressible fluid distribution systems obviate the need for channels to be patterned in the surface of the polar plate as the compressible fluid distribution systems can provide the same functionality
Implementation Method 3
The fluid distribution systems can be compressible such that they are compressed when the electrolyzer cell is compressed to form the seals for the cell
Data Source
AI summary
Methods and systems for fluid distribution in electrolyzer cells are disclosed herein. A disclosed a carbon oxide electrolyzer includes a polar plate, a cathode area, a carbon oxide reactant gas serving as a reduction substrate in the cathode area, a cathode fluid inlet, a cathode fluid outlet, an anode area, a liquid oxidation substrate in the anode area; and a compressed electrically conductive mesh: (i) in electrical contact with the polar plate; and (ii) that provides a fluid path from the cathode fluid inlet to the cathode fluid outlet for the carbon oxide reactant gas through the compressed electrically conductive mesh.