Composite Catalyst Electrode Layer for Higher Oxygen Reaction Area
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Solution Overview
Problem
The existing oxygen generating apparatuses face inefficiencies in oxygen production due to the consumption of oxygen at the cathode during redox reactions, highlighting the need for improved electrode materials and manufacturing methods to enhance reaction area and efficiency.
Innovation Solution
A method involving the mixing of catalysts with different average particle sizes, conductive agents, and adhesives to form a catalytic layer, which is then laminated with a conductive current collector and gas diffusion membrane, creating a structured electrode with increased surface area and reaction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single catalyst material is used in the catalytic layer, then the manufacturing process is simple, but the oxygen production efficiency is limited due to insufficient reaction area
Solution Approach 1:
The patent applies composite materials by combining multiple catalyst materials (first catalyst and second catalyst with different particle sizes) in the catalytic layer. This composite structure increases the reaction area and improves oxygen production efficiency while managing the complexity through a systematic approach to material composition.
Solution Approach 2:
The patent implements local quality by using catalysts with different particle sizes in specific proportions (weight ratio of 5:1 to 1:5) to create different reaction zones within the catalytic layer. The larger particle size catalyst provides structural stability while the smaller particle size catalyst increases surface area for reactions, optimizing local reaction conditions.
2Area of moving object
If catalyst particles are made smaller to increase surface area, then the reaction area increases, but the mechanical strength and stability of the catalytic layer decreases
Solution Approach 1:
The patent uses catalysts with different particle sizes to create local quality variations in the catalytic layer. Larger particle size catalysts provide mechanical strength and structural stability, while smaller particle size catalysts increase the catalytic reaction area. The specific weight ratio range (5:1 to 1:5) optimizes the balance between these competing requirements.
Solution Approach 2:
The patent creates a composite catalyst system where materials with different particle sizes work together. The composite structure combines the mechanical advantages of larger particles with the reactive advantages of smaller particles, achieving both stability and high reaction area in the same catalytic layer.
3Productivity
If more catalyst material is added to increase reaction area, then the oxygen production efficiency improves, but the cost and complexity of the electrode manufacturing increases
Solution Approach 1:
The patent optimizes the weight ratio parameter of different catalyst materials (first catalyst to second catalyst ratio of 5:1 to 1:5) to achieve maximum oxygen production efficiency. By carefully controlling this parameter, the patent improves productivity while managing manufacturing complexity through a defined compositional range.
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 approach results in improved oxygen production efficiency by enhancing the reaction area and stability of the electrochemical process, as demonstrated by increased current density per unit area over time in oxygen generating apparatus tests.
Implementation Method 1
the oxygen generating apparatus uses an electric motor (or an air compressor) to input the air in the atmospheric environment through the molecular sieve to separate the oxygen and nitrogen in the air, and thus a high concentration of oxygen is obtained. Because the oxygen generating apparatus carries out the redox reaction with the electrode based on the principle of a metal-air electrochemical cell
Data Source
AI summary
The present invention provides a manufacturing method of an electrode. The method includes steps of: mixing a first catalyst with a first average particle size, a second catalyst with a second average particle size, a first conductive agent, a first adhesive, and a solvent to form a first mixture, wherein a weight ratio of the first catalyst to the second catalyst is 5:1 to 1:5; stirring the first mixture to obtain a second mixture; rolling the second mixture into a catalytic layer; and pressing the catalytic layer with a conductive current collector and a gas diffusion film to obtain the electrode.