Titanium Oxide Fuel Cell Support With Porous Spherical Particles
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Solution Overview
Problem
Existing oxide-based supports for fuel cells face challenges with low specific surface area, conductivity, and difficulty in controlling particle shape and mass productivity due to limitations in continuous synthesis processes.
Innovation Solution
A method involving the use of cetyltrimethylammonium bromide (CTAB) as a pore control agent and a transition metal precursor in a sol-gel process, combined with ultrasonic spray pyrolysis, to produce titanium oxide-based supports with enhanced pore structure and conductivity, allowing for continuous reaction and spherical particle formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oxide-based supports are used to replace carbon supports for improved durability, then resistance to corrosion is improved, but specific surface area and conductivity deteriorate
Solution Approach 1:
The patent applies porous materials by incorporating a pore control agent (surfactant) during the sol-gel process to create a controlled porous structure in the oxide-based support. This porous structure increases the specific surface area while maintaining the oxide material's corrosion resistance, thus resolving the contradiction between durability and surface area.
Solution Approach 2:
The patent uses composite materials by combining oxide-based materials with a pore control agent and transition metal additives during the sol-gel process. This composite approach allows the oxide support to maintain its corrosion resistance while the porous structure and metal additives enhance the specific surface area and conductivity simultaneously.
2Reliability
If oxide-based supports are used to replace carbon supports for improved durability, then resistance to corrosion is improved, but conductivity deteriorates
Solution Approach 1:
The patent uses composite materials by combining oxide-based materials with a pore control agent and transition metal additives during the sol-gel process. This composite approach allows the oxide support to maintain its corrosion resistance while the porous structure and metal additives enhance the specific surface area and conductivity simultaneously.
3Quantity of substance
If sol-gel process is used to synthesize fine oxide particles, then specific surface area is improved, but control over particle shape and mass productivity deteriorates
Solution Approach 1:
The patent applies mechanical vibration by using ultrasonic spray pyrolysis, where ultrasonic waves vibrate the sol-gel solution to create uniform fine particles with controlled spherical shapes. This vibration mechanism ensures consistent particle morphology while maintaining high specific surface area and enabling continuous production.
Solution Approach 2:
The patent uses parameter changes by controlling the sol-gel solution composition, ultrasonic spray parameters, and calcination conditions to achieve desired particle characteristics. By adjusting these parameters, the process controls particle shape, size, and specific surface area while maintaining mass productivity.
4Quantity of substance
If sol-gel process is used to synthesize fine oxide particles, then specific surface area is improved, but mass productivity deteriorates
Solution Approach 1:
The patent applies continuity of useful action by using ultrasonic spray pyrolysis, which enables continuous processing of the sol-gel solution to produce fine oxide particles. This continuous method maintains high specific surface area while significantly improving mass productivity compared to batch sol-gel processes.
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 method achieves a titanium oxide-based support with a controlled pore structure, improved conductivity, and mass productivity, enabling the production of spherical particles with a diameter of 0.01 to 2 μm and pore diameters of 4 to 8 nm, suitable for fuel cell applications.
Implementation Method 1
allowing the ultrasonic spray solution to react by ultrasonic spray pyrolysis
Implementation Method 2
allowing the ultrasonic spray solution to react by ultrasonic spray pyrolysis
Implementation Method 3
preparing a sol-gel solution by mixing a titanium precursor and an ammonium-based pore control agent
Implementation Method 4
obtaining a final product by calcining the result obtained after completion of reaction
Data Source
AI summary
An embodiment method of manufacturing a titanium oxide-based support for a fuel cell includes preparing a sol-gel solution by mixing a titanium precursor and an ammonium-based pore control agent, preparing an ultrasonic spray solution by mixing the sol-gel solution and a transition metal precursor, allowing the ultrasonic spray solution to react by ultrasonic spray pyrolysis, and obtaining a final product by calcining a result obtained after completion of reaction.