Organic Hydride Cell Membrane Layout for High Current Density
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Solution Overview
Problem
Increasing the current density in organic hydride production leads to an increase in cell voltage, which can decrease Faradaic efficiency, especially when using electrolyte membranes with high water content and low resistance.
Innovation Solution
Employing an electrolyte membrane with an equivalent weight (EW) of less than 980 and incorporating a low water content layer between the electrolyte membrane and the cathode electrode, along with a high-water content layer between the electrolyte membrane and the anode electrode, to manage water content and ion transfer resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the current density is increased to improve production efficiency, then the production efficiency of organic hydride is improved, but the cell voltage increases which decreases Faradaic efficiency
Solution Approach 1:
The invention changes the water content parameter of the electrolyte membrane by selecting membranes with equivalent weights of 950-1100 (corresponding to 11-20% water content) and operates at controlled temperatures (60-100°C) to optimize the balance between ion conductivity and Faradaic efficiency, enabling high current density operation without excessive voltage increase
Solution Approach 2:
The invention creates different local conditions in the electrolyte membrane by controlling water content distribution through equivalent weight selection, where the membrane structure provides different properties in different regions to simultaneously achieve low resistance for high current density and appropriate water management for maintaining Faradaic efficiency
2Loss of energy
If an electrolyte membrane with high water content and low resistance is used to suppress cell voltage increase, then the cell voltage increase is suppressed, but the Faradaic efficiency decreases
Solution Approach 1:
The invention optimizes the equivalent weight parameter within the range of 950-1100, which corresponds to water content of 11-20%, to achieve the optimal balance between membrane resistance and Faradaic efficiency. This parameter optimization allows the system to operate at high current densities while maintaining acceptable voltage levels and efficiency
Solution Approach 2:
The invention utilizes dynamic control of operating conditions, particularly temperature (60-100°C) and current density, to dynamically balance the trade-off between membrane resistance and Faradaic efficiency. The system can adjust operating parameters to maintain optimal performance under varying conditions
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 configuration suppresses the increase in cell voltage while maintaining Faradaic efficiency, allowing for higher current density and improved production efficiency, reducing apparatus size and cost.
Implementation Method 1
an electrolyte membrane that has an equivalent weight (EW) of less than 980 and is arranged between the anode electrode and the cathode electrode so as to transfer the protons from the anode electrode side to the cathode electrode side
Implementation Method 2
an anode electrode that generates protons by oxidizing water
Implementation Method 3
an anode electrode that generates protons by oxidizing water
Implementation Method 4
a cathode electrode that generates an organic hydride by hydrogenating a substance to be hydrogenated with the protons
Data Source
AI summary
An apparatus for producing an organic hydride includes: an anode electrode that generates protons by oxidizing water; a cathode electrode that generates an organic hydride by hydrogenating a substance to be hydrogenated with the protons; an electrolyte membrane that has an EW of less than 980 and is arranged between the anode electrode and the cathode electrode so as to transfer the protons from the anode electrode side to the cathode electrode side; and a low water content layer that is arranged between the electrolyte membrane and the cathode electrode and that has a lower water content than that of the electrolyte membrane.