Offset Recess Perforated Plate Electrode for Gas Flow
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Solution Overview
Problem
Existing electrodes for electrolysis processes, such as water electrolysis and fuel cells, face challenges in balancing mechanical stability, mass flow, and surface area, often leading to gas stagnation and inadequate contact with membranes.
Innovation Solution
A perforated plate structure with two outer layers and an intermediate layer, featuring offset recesses and through-holes, provides enhanced mechanical stability, increased surface area, and optimized mass flow, suitable for use as electrodes in electrolysis and fuel cells, while allowing for a zero-gap configuration with proton or anion exchange membranes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mesh electrodes or perforated plate electrodes are used to optimize mass flow and increase surface area, then mass flow and surface area are improved, but mechanical stability deteriorates
Solution Approach 1:
The electrode is segmented into a modular structure consisting of a rigid support core with integrated flow channels, separated from the catalytic layer. This allows the support to provide mechanical strength while the catalytic layer provides surface area for reactions, resolving the contradiction between structural integrity and functional performance.
Solution Approach 2:
The electrode employs a composite structure combining a mechanically robust support material (such as porous ceramic or metal foam) with a catalytic coating layer. This composite design enables the electrode to simultaneously achieve high mechanical stability from the support and enhanced surface area from the catalytic layer, eliminating the need to compromise between these properties.
2Productivity
If the openings in electrodes are made sufficiently large to prevent gas stagnation, then mass flow is improved, but surface area deteriorates
Solution Approach 1:
The electrode design transitions from a two-dimensional flat plate with holes to a three-dimensional structured support with integrated channels. This dimensional change allows gas to flow through the electrode structure in multiple directions, preventing stagnation while maintaining a high external surface area for catalytic reactions.
Solution Approach 2:
The electrode utilizes porous materials with controlled pore size distributions, allowing smaller pores for catalytic surface area and larger interconnected channels for gas flow. This hierarchical porosity structure enables simultaneous optimization of both mass flow and surface area without compromise.
3Area of stationary object
If the electrode structure is made complex to increase surface area, then surface area is improved, but manufacturing complexity deteriorates
Solution Approach 1:
The support structure is pre-formed with integrated flow channels and geometric features that inherently provide both structural strength and surface area. This preliminary structuring eliminates the need for additional complex components or post-assembly operations, simplifying manufacturing while achieving the desired surface area.
Solution Approach 2:
The electrode support structure is designed to perform multiple functions simultaneously: providing mechanical strength, creating flow channels for gas transport, and offering surface area for catalytic reactions. This multi-functionality reduces the number of separate components needed, thereby simplifying the overall device complexity and manufacturing process.
Data Source
AI summary
A plate structure, such as a plate electrode, comprising two outer layers and an intermediate layer. Both outer layers are provided with a pattern of recesses, such as hexagonal or circular recesses. The recesses on one outer layer are offset with respect to the recesses in the other outer layer. The intermediate layer comprises through-holes, each through-hole connecting a recess at one outer layer with a partially overlapping recess at the opposite outer layer.