Channeled Electrodes via Integrated Deposition
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Solution Overview
Problem
The manufacturing of fuel cells is complex and expensive, requiring over 100 steps and involving dissociated deposition and heating/sintering processes, which complicates the production of efficient and economically viable fuel cell systems.
Innovation Solution
An integrated deposition and heating process using a template to form electrodes with channels, where electrode materials like Ni, YSZ, or CGO are deposited slice by slice and sintered using electromagnetic radiation, reducing manufacturing complexity and cost by eliminating the need for traditional sintering processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional dissociated deposition and sintering processes are used, then manufacturing precision can be maintained, but device complexity and manufacturing time increase significantly
Solution Approach 1:
The patent combines the deposition and sintering processes into a single integrated operation. The spray drying technique deposits precursor materials while simultaneously drying and forming the electrode structure, eliminating the need for separate sintering steps. This merging of operations reduces device complexity while maintaining manufacturing precision through controlled atomization and deposition parameters.
Solution Approach 2:
The patent performs preliminary preparation of precursor inks and controlled deposition conditions before the actual deposition. By pre-formulating the precursor materials with appropriate binders, solvents, and catalysts in specific ratios, and controlling the spray drying parameters in advance, the process achieves high precision electrodes without requiring complex post-deposition processing.
2Manufacturing precision
If traditional multi-step manufacturing processes are used, then product quality can be ensured, but productivity decreases due to lengthy processing times
Solution Approach 1:
The spray drying deposition process operates continuously, with the spray nozzle moving across the substrate and depositing material in a continuous stream. The rapid solvent evaporation and particle formation occur in-flight during deposition, eliminating idle time between steps. This continuous operation maintains high manufacturing precision while dramatically increasing productivity compared to batch-wise traditional processes.
Solution Approach 2:
The patent skips the traditional lengthy sintering step by using spray drying to directly form the electrode structure. The rapid drying and in-flight particle formation rush through what would traditionally require hours of sintering, achieving the desired electrode precision in seconds or minutes, thereby dramatically improving manufacturing speed.
3Reliability
If conventional fuel cell manufacturing is used, then component reliability can be maintained, but manufacturing cost increases due to complex processes
Solution Approach 1:
The patent changes the fundamental parameters of the deposition process by using spray drying instead of traditional sintering. By controlling parameters such as spray rate, drying temperature, precursor composition, and atomization pressure, the process achieves reliable electrode structures with controlled porosity, density, and catalyst distribution, maintaining fuel cell performance while simplifying manufacturing and reducing costs.
Solution Approach 2:
The patent replaces the thermal-mechanical sintering system with a spray-drying system that uses fluid dynamics and rapid evaporation. This substitution eliminates the need for complex high-temperature furnaces and lengthy processing cycles, reducing manufacturing equipment costs and operational expenses while maintaining the structural integrity and performance reliability of the fuel cell electrodes.
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
This method significantly reduces manufacturing complexity and cost by enabling rapid, in-situ sintering of fuel cell layers, shortening sintering time from hours to seconds, and improving electrolyte performance by minimizing cracking and thermal stress.
Implementation Method 1
The template is provided in a form that produces channels in the electrode material when at least a portion of the template is removed
Implementation Method 2
electrode materials like Ni, YSZ, or CGO are deposited slice by slice and sintered using electromagnetic radiation
Data Source
AI summary
There is disclosed a method of making an electrode for an electrochemical reactor including the steps of providing a template and depositing electrode material such that the electrode material is in contact with the template. This template is provided in a form that produces channels in the electrode material. There is also disclosed an electrode for an electrochemical reactor which includes electrode material and a template, with the template occupying channels in the electrode material.