Catechol Surfactant Infiltration for Solid Oxide Cell Catalysis
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Solution Overview
Problem
Existing infiltration methods for solid oxide fuel and electrolysis cells are labor-intensive and time-consuming, requiring repetitive steps and altering the electrode microstructure, which limits the incorporation of nano-catalysts and enhances structural instability.
Innovation Solution
A rapid-polymerization process using a catechol-based bio-surfactant and oxidant agent is applied to the electrodes, allowing for homogeneous nano-catalyst deposition within the porous structure in a single firing step, reducing processing time and labor, and enhancing surface area and catalytic activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional wet infiltration or impregnation process is used to deposit nanomaterials, then catalytic activity is enhanced, but the process becomes labor-intensive and time-consuming requiring repetitive infiltration and firing steps
Solution Approach 1:
The patent combines multiple infiltration steps into a single infiltration operation by using a modified electrode microstructure with enhanced porosity and interconnected pore network, allowing simultaneous deposition of nanomaterials throughout the electrode structure in one firing cycle
Solution Approach 2:
The electrode microstructure is pre-modified before nanomaterial deposition to create optimized pore structure with enhanced connectivity and surface area, enabling more efficient single-step infiltration and eliminating the need for repetitive processing
2Reliability
If conventional infiltration methods are used, then nanomaterials can be deposited, but the electrode microstructure is altered which causes structural instability
Solution Approach 1:
The patent applies local modification to the electrode microstructure by creating zones of enhanced porosity and connectivity specifically in the infiltration regions, while maintaining the overall structural integrity and stability of the electrode architecture
Solution Approach 2:
The patent utilizes a porous electrode structure with optimized pore size distribution and connectivity to enable efficient nanomaterial infiltration while maintaining structural stability, leveraging the porous architecture to support both the infiltration process and the final catalytic function
3Reliability
If repetitive infiltration steps are performed to achieve desired catalyst loading, then catalytic performance is improved, but processing time and labor requirements increase
Solution Approach 1:
The patent merges multiple infiltration operations into a single step by optimizing the electrode pore structure to allow comprehensive nanomaterial deposition throughout the electrode in one firing cycle, achieving desired catalyst loading without repetitive processing
Solution Approach 2:
The patent changes the physical parameters of the electrode microstructure, specifically porosity and pore connectivity, to enable higher nanomaterial uptake in a single infiltration step, thereby reducing processing time while maintaining desired catalyst loading
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 process results in smaller nano-catalyst particle sizes with improved electrochemical performance, reducing polarization resistance and enhancing the triple and double phase boundaries, thus improving the overall power density of the cells.
Implementation Method 1
spraying a catechol based bio-surfactant onto a surface of and within one or more pores of a solid oxide electrochemical cell... spraying a nano-catalyst solution onto said surface of and within said one or more pores of said solid oxide electrochemical cell that was pretreated with said catechol based bio-surfactant for forming a modified solid oxide electrochemical cell
Implementation Method 2
spraying a nano-catalyst solution onto said surface of and within said one or more pores of said solid oxide electrochemical cell... incorporating at least one nano-catalyst on the surface of and within a plurality of pores of an electrode
Implementation Method 3
firing said modified solid oxide electrochemical cell above a calcination temperature of said nano-catalyst solution for forming a nano-catalyst on said surface and within at least one or more pores of said solid oxide electrochemical cell
Data Source
AI summary
The present invention provides a process for incorporating at least one nano-catalyst on the surface of and within a plurality of pores of an electrode. The process includes spraying or dripping a catechol based surfactant onto the surface of and within one or more pores of a solid oxide electrochemical cell having an anode electrode and a cathode electrode; spraying or dripping a nano-catalyst solution onto the surface of and within one or more pores of the solid oxide electrochemical cell that has been pretreated with the catechol based surfactant for forming a modified solid oxide electrochemical cell; and firing the modified solid oxide electrochemical cell above a calcination temperature of the nano-catalyst solution for forming a nano-catalyst on the surface and within at least one or more pores of the solid oxide electrochemical cell.