Integrated Metal SOFC Support Layer for High Power Density
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current solid oxide fuel cell (SOFC) systems have low power densities and slow startup times, which are inadequate for aircraft and aerospace applications requiring high power density and rapid startup.
Innovation Solution
A method of forming a fuel cell layer by stacking a separator plate with corrugations defining anode and cathode flow channels, and a support layer secured via field-assisted sintering, with a porous portion surrounding the anode flow channels to enhance fuel flow and airflow, using materials from groups 7-12 of the periodic table for increased conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional SOFC systems are used, then electrical efficiency of 60% or greater is achieved, but power density remains below 500 watts per kilogram
Solution Approach 1:
The fuel cell system is divided into multiple individual fuel cell units that can be stacked together. Each unit contains separate anode, cathode, and electrolyte layers arranged in a segmented modular structure, allowing parallel operation to achieve high power density while maintaining individual cell efficiency
Solution Approach 2:
The patent employs composite material structures including porous ceramic electrolytes combined with metallic interconnects, and cathode materials composed of perovskite-phase ceramics with optimized compositional ratios. These composite materials simultaneously achieve high ionic conductivity for efficiency and high surface area for power density
2Speed
If conventional SOFC systems are used, then fuel flexibility is maintained, but startup time exceeds 30 minutes
Solution Approach 1:
The patent operates the fuel cell at optimized temperature parameters (600-800°C) that enable rapid startup while maintaining the ability to process various fuels. The electrolyte composition and thickness are specifically parameterized to achieve fast ion transport at these temperatures, reducing startup time to under 30 minutes while preserving fuel flexibility
Solution Approach 2:
The fuel cell system includes pre-heating mechanisms and pre-conditioned electrolyte layers that are prepared in advance to reach operational temperature and ionic conductivity thresholds quickly. The modular design allows pre-assembly of complete fuel cell units with all necessary components already in position, enabling rapid deployment when fuel is supplied
3Power
If power density is increased to 1-3 kilowatts per kilogram, then aircraft applications are enabled, but manufacturing complexity increases
Solution Approach 1:
The fuel cell is constructed from standardized, repeatable modular units where each unit contains identical anode, cathode, and electrolyte layers. This segmentation allows mass production of identical components using the same manufacturing processes, reducing overall manufacturing complexity despite high power density requirements
Solution Approach 2:
The patent employs universal interconnect structures and standardized electrode patterns that serve multiple functions: electrical connection, mechanical support, and gas distribution. These multi-functional components reduce the number of separate parts needed, simplifying manufacturing while achieving the required 1-3 kW/kg power density
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 high power density and reduced startup times, enabling fuel cells for aircraft applications with power densities of 1-3 kilowatts/kilogram and cell performance of ≥0.8 W/cm², utilizing lightweight materials and advanced manufacturing techniques.
Implementation Method 1
The support layer and the separator plate are stacked, and the support layer is secured to the separator plate via a field-assisted sintering or spark plasma sintering (FAST) process
Data Source
AI summary
A method of forming a fuel cell layer includes forming a separator plate including a plurality of corrugations defining a plurality of anode flow channels at a first side of the separator plate and a plurality of cathode flow channels at a second side of the separator plate opposite the first side. A support layer is formed, including a porous portion and a solid portion at least partially surrounding the porous portion. The support layer and the separator plate are stacked, and the support layer is secured to the separator plate via a field-assisted sintering or spark plasma sintering (FAST) process.