Micro-channel Electrode Structure for Desalination
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Solution Overview
Problem
There is a need for inexpensive, efficient, and high-throughput methods and devices for enabling electrochemical reactions between an electrolyte and an electrode, particularly in applications like water desalination, which current technologies have not adequately addressed in terms of energy efficiency and manufacturing cost.
Innovation Solution
A three-dimensional micro-channel structure is developed, featuring a layer with an electrode micro-channel and a fluid micro-channel that intersect, allowing the electrode to extend into the intersection without occluding the fluid micro-channel, and is connected to an electrical power source, optimizing flow rate and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the electrode extends into the intersection of fluid micro-channels to enhance electrochemical reactions, then the reaction efficiency is improved, but the fluid flow path may be occluded
Solution Approach 1:
The electrode is positioned to extend only partially into the micro-channel intersection, specifically occupying only a portion of the intersection space. This localized placement optimizes the electrochemical reaction area while preserving sufficient fluid flow path, resolving the contradiction between reaction efficiency and flow rate.
2Reliability
If conventional electrochemical devices are used, then electrochemical reactions can be performed, but energy consumption is high and manufacturing cost is high
Solution Approach 1:
The invention transitions from conventional two-dimensional planar electrode configurations to a three-dimensional micro-channel structure where electrodes extend vertically into channel intersections. This dimensional change increases the effective reaction surface area without proportionally increasing device footprint, thereby improving reaction efficiency and reducing energy consumption per unit volume.
3Reliability
If conventional electrochemical devices are used, then electrochemical reactions can be performed, but manufacturing cost is high
Solution Approach 1:
The device is constructed from multiple separate layers (first layer with fluid micro-channels, second layer with electrode micro-channels) that can be manufactured independently using standard micro-fabrication techniques, then assembled together. This segmented approach simplifies manufacturing compared to conventional monolithic structures, reducing production costs while maintaining electrochemical functionality.
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 structure enhances the flow rate of the liquid electrolyte, improves energy efficiency, and reduces manufacturing costs, making it suitable for applications such as water desalination.
Implementation Method 1
Electrochemical reactions between an electrolyte (an ionic conductor) and an electrode are of widespread interest. Electrochemical reactions occur when an externally provided current passes between the electrode and the electrolyte.
Implementation Method 2
A related article in the Proc. of SPIE Vol. 8548 85483R-6 entitled A portable and high energy efficient desalination/purification system by ion concentration polarization describes a higher-throughput water desalination approach that utilizes ion concentration polarization.
Data Source
AI summary
A micro-channel electrode structure includes a layer and an electrode micro-channel formed in the layer, the electrode micro-channel having an electrode micro-channel bottom forming the bottom of the electrode micro-channel and an electrode micro-channel top forming the top the electrode micro-channel. The electrode micro-channel is at least partially filled with an electrode that extends along the electrode micro-channel and extends from the electrode micro-channel bottom toward the electrode micro-channel top. A fluid micro-channel adapted to carry a fluid is formed in the layer. An electrical power source is connected to the electrode. The fluid micro-channel intersects the electrode micro-channel in the layer to form a micro-channel intersection and the electrode extends from the electrode micro-channel into the micro-channel intersection without occluding the fluid micro-channel.