Capacitive Deionization Electrode with Merged Adsorption Layers
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Solution Overview
Problem
Existing deionization technologies face challenges in efficiently separating ions from water using capacitive deionization electrodes, particularly in achieving uniform adsorption layers and ion selective membranes for effective ion removal.
Innovation Solution
A capacitive deionization electrode with a circular flat current collector, porous adsorption layers, and ion selective membranes of different or same polarities, configured in a stacked module within a cylindrical deionization unit, where the electrodes are supplied with direct current to separate ions based on membrane polarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional coating methods are used to form adsorption layers and ion selective membranes, then the manufacturing process becomes complex and time-consuming, but the uniformity and quality of the layers may be compromised
Solution Approach 1:
The patent combines multiple functional layers (adsorption layer and ion selective membrane) into a single integrated coating applied to the current collector. This merging of layers simplifies the manufacturing process by reducing the number of separate coating and drying steps, while maintaining uniformity through a single-application process that ensures consistent thickness and composition across the electrode surface.
Solution Approach 2:
The invention uses a composite coating material that contains both adsorption functional groups and ion selective components in a single formulation. This composite approach allows both functions to be achieved simultaneously in one layer, eliminating the need for separate coating steps and reducing manufacturing complexity while ensuring uniform distribution of both functionalities throughout the layer.
2Productivity
If multiple separate coating steps are used to form different layers, then layer differentiation is achieved, but production time and manufacturing cost increase
Solution Approach 1:
The patent merges the formation of multiple functional layers into a single coating step, where the coating composition contains both adsorption materials and ion selective components. This single-step process dramatically increases production speed by eliminating sequential coating and drying cycles, while the controlled composition formulation ensures proper layer structure and functional differentiation are maintained.
3Reliability
If ion selective membranes are formed with crosslinking agents and monomers, then ion selectivity is improved, but the manufacturing process becomes more complex and time-consuming
Solution Approach 1:
The patent combines ion selective membrane formation with the adsorption layer coating process by incorporating ion selective components directly into the coating composition. This eliminates the need for separate crosslinking and membrane formation steps, making the manufacturing process easier and faster while maintaining reliable ion selectivity through the integrated functional design.
Solution Approach 2:
The invention changes the chemical parameters of the coating composition to include pre-formulated ion selective compounds that provide the desired selectivity without requiring post-application crosslinking reactions. This parameter change in the coating formulation simplifies the manufacturing process by eliminating complex chemical reactions during or after coating, while still achieving reliable ion selectivity.
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 solution enables efficient ion separation from water, improving productivity through continuous automatic production and allowing for bipolar or monopolar operation, enhancing ion removal efficiency and system flexibility.
Implementation Method 1
a first adsorption layer which is formed on one surface of the graphite sheet, and a second adsorption layer which is formed on the other surface of the graphite sheet
Implementation Method 2
the first adsorption layer and the second adsorption layer respectively having a porous structure
Implementation Method 3
a first ion selective membrane which is formed on a surface of the first adsorption layer, and a second ion selective membrane which is formed on a surface of the second adsorption layer
Implementation Method 4
configured in a stacked module within a cylindrical deionization unit, where the electrodes are supplied with direct current to separate ions based on membrane polarity
Data Source
AI summary
Disclosed are a deionization electrode having ion adsorption layers and ion selective membranes formed at opposite ends thereof, an electrode module configured such that deionization electrodes are stacked, and a deionization unit having electrode modules received therein to separate ions from water. The deionization electrode includes a current collector configured to have a circular flat structure, the current collector having a first hole formed therein, a first porous adsorption layer located on one surface of the current collector, the first adsorption layer being configured to have a flat structure, a second porous adsorption layer located on the other surface of the current collector, the second adsorption layer being configured to have a flat structure, a first ion selective membrane located on the surface of the first adsorption layer, and a second ion selective membrane located on the surface of the second adsorption layer.