Wave-Shaped Anode Channels for Water Electrolysis Gas Discharge
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Solution Overview
Problem
In existing water electrolysis systems, oxygen generated at the anode is not properly discharged and water supply is hindered, leading to deterioration in electrolysis performance and durability.
Innovation Solution
The water electrolysis cell design includes an anode separator with wave-shaped channels for turbulent water flow, an anode gas diffusion layer with hydrophilic treatment, and a cathode separator with hydrophilic treatment, ensuring efficient gas movement and water distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If water is supplied to the anode for electrolysis, then electrolysis reaction is enabled, but generated oxygen gas is retained and water supply is hindered leading to performance deterioration
Solution Approach 1:
The channel in the anode separator is designed with a wave shape instead of a straight line, creating curvature that promotes turbulent flow of water and facilitates efficient oxygen gas discharge while maintaining continuous water supply to the anode catalyst layer
Solution Approach 2:
The inner surface of the wave-shaped channel is subjected to water repellency treatment, changing the surface properties from hydrophilic to hydrophobic, which prevents water accumulation and maintains smooth gas discharge pathways
2Quantity of substance
If water accumulates at the anode, then water supply is ensured, but gas movement is inhibited and electrolysis efficiency deteriorates
Solution Approach 1:
The wave-shaped channel design creates alternating regions of water flow and gas discharge, preventing water accumulation while ensuring continuous water supply to the anode catalyst layer through the curved pathway
Solution Approach 2:
Different regions of the channel have different functions: some regions facilitate water supply to the anode while other regions facilitate gas discharge, achieved through the wave shape geometry and water repellency treatment distribution
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 enhances electrolysis performance by preventing gas retention and improving water distribution, thereby maintaining cell durability and efficiency.
Implementation Method 1
a face of the anode gas diffusion layer that faces the anode separator may be subjected to hydrophilic treatment
Implementation Method 2
a channel is provided in the anode separator, and the channel extends in a wave shape
Implementation Method 3
an inner surface of the channel of the anode separator may be subjected to water repellency treatment
Data Source
AI summary
A water electrolysis cell includes an anode disposed on one side across a solid polymer electrolyte membrane and a cathode disposed on another side. The anode is configured of an anode catalyst layer, an anode gas diffusion layer, and an anode separator, laminated in that order from a side of the solid polymer electrolyte membrane, a channel is provided in the anode separator, and the channel extends in a wave shape.