Water Electrolysis Cell Vibration for Gas Bubble Removal
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Solution Overview
Problem
Conventional electrolyzers face issues with gas bubbles forming on electrodes and diaphragms, leading to impedance in mass transfer, reduced ionic conductivity, and increased safety and purity concerns due to mixing of oxygen and hydrogen gases.
Innovation Solution
Incorporation of a coating material on bipolar plates to prevent bubble adhesion and actuators within electrodes to generate oscillation forces, disrupting bubble adherence and enhancing turbulence in the electrolyte solution, thereby improving energy efficiency and reducing over-potential.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional electrolyzers are used, then water electrolysis can be performed, but gas bubbles form on electrodes and diaphragms causing impedance for mass transfer and reduced ionic conductivity
Solution Approach 1:
The patent applies mechanical vibration through actuators (piezoelectric, magnetostrictive, or electromagnetic) integrated into the electrolyzer system. These actuators generate vibrations that disrupt gas bubble adhesion on electrode and diaphragm surfaces, preventing impedance to mass transfer and maintaining high ionic conductivity. The vibration frequency and amplitude are controlled to optimize bubble removal while minimizing impact on the electrolysis process.
Solution Approach 2:
The patent modifies operational parameters by introducing controlled mechanical vibrations and altering flow dynamics through the electrolyte circulation system. These parameter changes prevent gas bubble accumulation on critical surfaces, thereby maintaining optimal mass transfer conditions and ionic conductivity throughout the electrolysis process.
2Power
If gas bubbles accumulate on electrodes and diaphragms, then electrolysis continues, but polarization increases and ionic conductivity decreases
Solution Approach 1:
The integrated actuators generate mechanical vibrations that actively remove gas bubbles from electrode and diaphragm surfaces in real-time. This continuous bubble removal prevents polarization buildup and maintains low over-potential, thereby maximizing electrolysis efficiency and minimizing energy losses throughout the operation.
Solution Approach 2:
The system implements continuous bubble removal through sustained mechanical vibration and enhanced electrolyte circulation. This continuous action ensures that gas bubbles do not accumulate to levels that would cause polarization or increase over-potential, maintaining consistent electrolysis efficiency and energy efficiency throughout the process.
3Productivity
If gas bubbles are present in the liquid electrolyte, then electrolysis proceeds, but mixing of oxygen and hydrogen gas increases creating safety and purity concerns
Solution Approach 1:
The mechanical vibration generated by the actuators creates acoustic streaming and cavitation effects that enhance gas bubble coalescence and directional movement toward designated collection zones. This vibration-assisted separation prevents mixing of hydrogen and oxygen gases in the liquid electrolyte, maintaining high gas purity and safety while preserving hydrogen production productivity.
Solution Approach 2:
The system employs enhanced electrolyte circulation and flow management combined with vibration-induced bubble movement to achieve effective gas separation. The hydraulic flow patterns, guided by vibration, direct gas bubbles toward separate collection channels, preventing mixing and ensuring high purity hydrogen and oxygen production.
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 solution effectively reduces bubble adhesion, enhances mass transfer rates, and improves safety by minimizing hydrogen permeation and gas mixing, resulting in increased energy efficiency and purity of the electrolysis process.
Implementation Method 1
An oscillation force is generated in the first electrode set using a first actuator
Implementation Method 2
converts, using an electrochemical cell, water into H2 and diatomic oxygen (O2) via a redox reaction by applying an external electrical power to the cell
Implementation Method 3
Electrolysis of water is utilized for the production of hydrogen (H2)
Data Source
AI summary
The present disclosure generally provides systems and methods of water electrolysis. The systems include a first electrode set. The first electrode set includes a first bipolar plate electrically coupled to a power source. A first electrode is disposed adjacent to the first bipolar plate and in electrical contact with the first bipolar plate. The first actuator is electrically coupled to a second power source. The systems include a diaphragm. The first electrode is disposed adjacent to a first side of the diaphragm. The systems include a second electrode set. The second electrode set includes a second bipolar plate and a second electrode. The second electrode is disposed adjacent to a second side of the diaphragm. The second side is opposite the first side. The system include actuators embedded in the system to facilitate gas bubble expulsion to enhance electrolysis efficiency.