Janus Cathode Electrolysis System for H2O2 Production
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Solution Overview
Problem
Existing electrolysis systems for producing hydrogen peroxide in household appliances are costly, require hazardous chemicals, and are inefficient due to membrane clogging and the need for ultrapure water, making them unsuitable for widespread use.
Innovation Solution
An electrolysis system with a Janus cathode and modular design using tap water, which includes a hydrophilic and hydrophobic side for efficient hydrogen peroxide production, and a scalable, interchangeable module structure that integrates easily into household appliances without requiring hazardous chemicals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a polymeric membrane is used to separate electrolytic chambers, then hydrogen peroxide production efficiency is improved, but the membrane becomes easily clogged requiring ultrapure water and increasing system complexity
Solution Approach 1:
The patent removes the polymeric membrane from the electrolysis cell design, extracting the component that causes clogging and complexity. The separation function is achieved through physical arrangement of electrodes and electrolyte flow paths without requiring a membrane barrier, thereby eliminating membrane clogging issues and reducing system complexity while maintaining hydrogen peroxide production efficiency
Solution Approach 2:
The patent employs a disposable diaphragm made of inexpensive material that can be easily replaced when worn or contaminated, rather than using an expensive, complex polymeric membrane requiring ultrapure water. This disposable approach reduces system complexity and maintenance requirements while maintaining effective separation of electrolyte chambers
2Productivity
If a polymeric membrane is used to separate electrolytic chambers, then hydrogen peroxide production efficiency is improved, but the cost per cell increases
Solution Approach 1:
The patent removes the expensive polymeric membrane from the electrolysis cell design, extracting the component that drives up manufacturing costs. The separation function is achieved through simpler physical arrangements and disposable diaphragms, significantly reducing the cost per cell while maintaining hydrogen peroxide production efficiency
Solution Approach 2:
The patent replaces expensive, complex polymeric membranes with inexpensive disposable diaphragms that can be easily replaced when needed. This approach dramatically reduces the initial manufacturing cost per cell and eliminates the need for costly ultrapure water systems, making the electrolysis cell more economically viable
3Productivity
If chemicals such as sulphuric acid are used to increase electrolyte conductivity, then hydrogen peroxide production is improved, but hazardous chemicals are introduced making household appliance use unsuitable
Solution Approach 1:
The patent changes the chemical composition parameters of the electrolyte by using plain water instead of acidified solutions. The electrolysis cell achieves effective hydrogen peroxide production through optimized electrical parameters and electrode design without requiring hazardous chemicals like sulphuric acid, making it safe for household appliance use while maintaining productivity
Solution Approach 2:
The patent converts the potential harm of using hazardous chemicals into a benefit by demonstrating that plain water can serve as an effective electrolyte when combined with proper electrode design and electrical parameters. This eliminates the harmful chemical aspect while maintaining or improving hydrogen peroxide production efficiency through safer, household-friendly conditions
4Reliability
If ultrapure water is required to prevent membrane clogging, then system reliability is improved, but device complexity and cost increase
Solution Approach 1:
The patent removes the polymeric membrane that requires ultrapure water, extracting the source of the reliability issue. By using alternative separation methods and disposable diaphragms, the system achieves reliability without requiring ultrapure water, thereby reducing device complexity and eliminating the need for complex water purification systems
Solution Approach 2:
The patent employs disposable diaphragms that can be easily replaced when contaminated or worn, rather than requiring ultrapure water to prevent clogging. This approach maintains system reliability through simple replacement rather than complex purification, reducing device complexity and making the system more suitable for household appliances
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 system enables cost-effective, efficient production of hydrogen peroxide using tap water, reducing energy consumption and eliminating the need for complex membranes, while being compatible with various household appliances and allowing for easy maintenance and scalability.
Implementation Method 1
an anode which can be operatively brought into contact with the aqueous electrolyte for oxidation of H2O
Implementation Method 2
a cathode which can be operatively brought into contact with air for the reduction of oxygen and the formation of H2O2
Implementation Method 3
the cathode is a Janus electrode with an hydrophilic side, which is operatively connectable with the aqueous electrolyte
Implementation Method 4
an hydrophobic side, which is operatively connectable with the air
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to an electrolysis system (10) for a household appliance for producing hydrogen peroxide (H2O2) from water and oxygen, with at least one electrolysis module (12). The module (12) comprises a water housing member (14) at least partially defining a fluid path for an aqueous electrolyte, an anode (16) which can be operatively brought into contact with the aqueous electrolyte for oxidation of H2O, a sealing member (18), a cathode (22) which can be operatively brought into contact with air for the reduction of oxygen and the formation of H2O2, wherein the cathode is a Janus electrode with an hydrophilic side (40), which is operatively connectable with the aqueous electrolyte, and an hydrophobic side (42), which is operatively connectable with the air, and an air housing member (24) having at least one air passageway (26) through which the air can enter the air housing member (24) and be directed to the cathode (22). The invention further relates to a household appliance comprising such an electrolysis system (10).