Electrolyteless Fuel Cell Grid Biasing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fuel cell technologies face challenges with voltage drop due to overpotential, particularly at the cathode, and unequal thermal expansion of components, which affects performance, cost, and reliability, especially at high temperatures.
Innovation Solution
An electrolyteless fuel cell system with a negatively or positively biased electrical grid between the anode and cathode, eliminating the need for electrolytes and allowing for flexible operating temperatures, thus simplifying material selection and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional electrolyte-based fuel cells are used, then ion transport between anode and cathode is enabled, but voltage drop due to overpotential occurs particularly at the cathode
Solution Approach 1:
The patent removes the electrolyte component from the fuel cell system entirely, extracting the source of overpotential and voltage drop. By replacing the electrolyte with a direct physical connection between anode and cathode, the system eliminates the interfacial resistance and activation losses that occur at electrolyte-electrode interfaces, particularly at the cathode where oxygen reduction occurs.
Solution Approach 2:
The patent introduces a novel intermediary structure - a direct physical connection or support matrix - that enables ion transport without requiring traditional electrolyte materials. This intermediary provides a pathway for ion conduction while maintaining direct electrical contact, thereby reducing the overpotential that would otherwise occur at electrolyte interfaces.
2Productivity
If high operating temperatures are used to improve reaction kinetics, then fuel cell performance increases, but unequal thermal expansion of components occurs
Solution Approach 1:
The patent employs composite material structures that combine materials with complementary thermal expansion properties. By creating a composite architecture where different materials are integrated at the component level, the system achieves uniform thermal expansion behavior even at elevated temperatures, while maintaining the kinetic benefits of high-temperature operation.
Solution Approach 2:
The patent modifies the thermal and mechanical parameters of the fuel cell components by eliminating the electrolyte layer and using alternative structures with tailored thermal properties. This parameter change allows the system to operate at high temperatures without suffering from differential thermal expansion, as the new material configuration has matched or compatible thermal expansion coefficients across all components.
3Reliability
If electrolyte materials are selected to enable ion transport, then electrochemical reactions are sustained, but material selection becomes complex and costs increase
Solution Approach 1:
The patent extracts and removes the electrolyte material from the system, eliminating the need for complex material selection and compatibility matching. By replacing the electrolyte with a simple structural component or direct connection, the system maintains ion transport capability while dramatically simplifying the bill of materials and reducing component compatibility constraints.
Solution Approach 2:
The patent creates a multi-functional component that simultaneously provides structural support, enables ion transport, and maintains electrical connectivity without requiring separate specialized electrolyte materials. This universal component approach eliminates the need for complex material selection processes and reduces the overall system complexity.
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 electrolyteless design reduces overpotential issues, allows for variable operating temperatures, and simplifies material selection, leading to improved performance, cost-effectiveness, and rapid startup capabilities.
Implementation Method 1
the electrical grid is biased negative with respect to the anode through the anode side grid bias electrode and the electrical grid power supply
Implementation Method 2
At the anode, a catalyst (e.g., platinum) causes the fuel, for example, hydrogen (H2) to undergo an oxidation reaction that generates protons (H) and electrons (e)
Implementation Method 3
At the cathode, another catalyst (e.g. platinum) causes the hydrogen ions and electrons to react with oxygen (O2), thereby forming water (H2O)
Implementation Method 4
electrons are drawn from the anode to the cathode through an external circuit thereby producing direct current electricity
Data Source
AI summary
An electrolyteless fuel cell system includes an anode; a cathode; an electrical grid between the anode and cathode; an anode side grid bias electrode; a cathode side grid bias electrode; and an electrical grid power supply, wherein the electrical grid is biased negative with respect to the anode through the anode side grid bias electrode and the electrical grid power supply, or wherein the electrical grid is biased positive with respect to the cathode through the cathode side grid bias electrode and the electrical grid power supply. In electrolyteless electrolyzer mode steam is introduced to the cathode, wherein the electrical grid is biased positive with respect to the cathode through the cathode side grid bias electrode and the electrical grid power supply.