Flow Electrolyzer Stack (5 Cells) for Water Splitting and CO2 Electroreduction (CO2RR), CWSCO2RRFES

A flow electrolyzer stack is the core electrochemical "engine" used to drive continuous chemical conversions, such as splitting water into green hydrogen and oxygen or reducing CO₂ into value-added chemicals. By stacking multiple individual electrochemical cells together—typically in series—the system can scale up production rates while managing a continuous flow of liquid electrolytes and gaseous reactants.

A stack is essentially a repeating sandwich of precision-engineered components compressed together between two heavy end plates. The primary layers within each cell include: (1) Bipolar Plates (Flow Fields): These are conductive plates machined or stamped with complex channels. They serve three critical functions: uniformly distributing the reactant flow across the active area, conducting electrical current from one cell to the next, and physically separating the cells. (2) Porous Transport Layers (PTLs) / Gas Diffusion Layers (GDLs): Sitting between the bipolar plates and the catalyst, these highly porous materials (often titanium felt for the anode and carbon paper for the cathode) allow liquid and gas to pass through while providing electrical contact to the reaction sites. (3) Membrane Electrode Assembly (MEA): This is where the actual electrochemical magic happens. It consists of an ion-conducting membrane (such as a Proton Exchange Membrane or Anion Exchange Membrane) coated on both sides with specific catalysts (the anode and cathode). The membrane allows specific ions to pass through while keeping the reactant and product gases separated. (4) Seals and Gaskets: Precision elastomers are used around the edges of every layer to prevent the pressurized liquids and highly fugitive gases (like hydrogen) from leaking out of the stack or mixing internally.

The main applications of the flow electrolyzer stack are: (1) Water Electrolysis (PEM, Alkaline, AEM): Splitting H₂O into H₂ and O₂. (2) CO₂ Electroreduction: Feeding captured CO₂ and water into the stack to produce synthetic fuels or industrial chemicals like syngas, formate, or ethanol. The flow architecture is critical here to manage the complex mass transport of CO₂ gas to the liquid/solid catalyst interface.

Part Number	CWSCO2RRFES (C-WSCO2RR-FES)
Structure/Components	Current Collector/Flow Channel: five pieces of SS316L or Ti bipolar plates Five chambers with parallel flow channels Electrode Gasket: PTFE Tubing Connection: Barbed hose fitting (connecting tube I.D. 2 mm)  M4 tighten screw (8 pieces)
Cell Sizes	Default effective area is 2.0 cm * 2.0 cm (4.0 cm2)  Other types of active areas, such as (1.6cm * 1.6cm) (3.2cm * 3.2cm), (5 cm * 5cm) are also available upon request.   Cell size: W60×H70 mm
Flow Channels	Standard flow channel is Serpentine                Other flow channel types: such as interdigital, parallel serpentine are also available upon request.
Assembling Diagram
Flow Pump (Optional)	The flow pump can be supplied upon request
Note	The cell components should be thoroughly cleaned and dried after use.