Multi-Stack CO2 Electrolysis Cell for Compact High-Throughput Conversion
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Solution Overview
Problem
Existing electrolysis cells are inefficient for large-scale electrochemical conversion of carbon dioxide (CO2) into useful compounds, lacking the ability to achieve high throughput and efficiency in a compact space.
Innovation Solution
An electrolysis cell design featuring multiple stacks with integrated fluid and power supply lines, allowing simultaneous operation of multiple stacks through bipolar electrodes, fluid supply and discharge lines, and a compact cylindrical construction for efficient CO2 conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single large electrolysis cell is used to increase CO2 conversion capacity, then throughput increases, but device complexity and space requirements increase
Solution Approach 1:
The electrolysis cell is divided into multiple stacks (2-50 stacks) that can be connected in series. Each stack operates independently but contributes to the overall throughput, allowing modular scaling without proportionally increasing complexity. The stacks are arranged in a compact configuration where multiple stacks rest against one another.
Solution Approach 2:
Multiple stacks are combined into a single integrated electrolysis cell structure. The fluid supply lines and discharge lines are configured to simultaneously supply and discharge fluid to multiple stacks, while power lines apply current to all stacks simultaneously, creating a unified system that achieves high throughput without proportional increases in complexity.
2Volume of stationary object
If multiple stacks are connected in series to improve space efficiency, then volume decreases, but manufacturing complexity increases
Solution Approach 1:
The cell is segmented into identical stack modules that can be manufactured separately and then assembled. Each stack has the same structure with anode space, cathode space, and gas space, allowing standardized manufacturing processes. The modular design simplifies assembly compared to manufacturing a single large cell.
Solution Approach 2:
The stacks are designed with universal connection interfaces that allow them to be connected in series both electrically and fluidically. The bipolar electrodes serve multiple functions: electrical connection between stacks, structural support, and fluid distribution. This multi-functionality reduces the need for additional connection components and simplifies manufacturing.
3Volume of stationary object
If stacks are arranged to rest against one another for compact construction, then space utilization improves, but pressure resistance requirements increase
Solution Approach 1:
The stacks are designed with locally optimized structural features at the connection points where they rest against one another. The bipolar electrodes and sealing structures are reinforced at these critical locations to handle pressure loads. The gas space and cathode space are configured with appropriate pressure containment features at the interfaces between stacks.
Solution Approach 2:
The stacks utilize composite material structures combining different materials with complementary properties. The bipolar electrodes use materials that provide both electrical conductivity and mechanical strength. The sealing structures incorporate materials that resist pressure differential while maintaining compact stacking arrangement. This allows tight stacking for space efficiency while maintaining pressure resistance.
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 design achieves high efficiency and throughput in a compact form, enabling effective conversion of CO2 into useful products like methane or ethanol, with improved space utilization and pressure resistance.
Implementation Method 1
an electrolysis cell for reducing carbon dioxide, comprising at least one stack made of an anode space, a cathode space
Implementation Method 2
the electrochemical reduction of CO2 into fuels represents a particularly interesting option
Implementation Method 3
supplied CO2 can enter the cathode space via a membrane or film or the like, according to the principle of a gas diffusion electrode
Implementation Method 4
a power line for applying a voltage between the cathode space and anode space
Data Source
AI summary
An electrolysis cell for reducing carbon dioxide includes at least one stack made of an anode space, a cathode space, and optionally a gas space adjoining the cathode space, as well as fluid supply lines and fluid discharge lines that are configured to supply the anode space with anolyte, the cathode space with catholyte and electively gas, or the optional gas space with gas, and a power line for applying a voltage between the cathode space and anode space. In embodiments, multiple stacks are provided and the fluid supply lines and the fluid discharge lines and the power line are configured for the simultaneous supply of fluid and application of current to multiple, in particular all, stacks.