S-Cell – Redox Flow Battery Test Cell

25 cm2 flow battery test cell for optimisation of carbon felt electrodes and bipolar plate.

Features:

• The most unique product on the market of flow battery test cells
• 5 cm x 5 cm OR 2.5 cm x 2.5 cm active area – other areas are available on request
• Can be used with and with-out bipolar plates
• Geometry is similar to what is seen inside large scale stacks
• Intended for optimisation of electrodes, bipolar plates and membranes
• Cell potential can be measured directly on bipolar plate material

Description:

The design of the S-cell is a result of almost 10 years of know-how in the field of flow battery test cells. It was developed for fast testing and optimisation of stack components, like carbon felt electrode/bipolar plate materials and membranes. Electrodes must be at least 1 mm thick, but can be used for any type of electrode material. Different electrode compressions can be obtained by different spacer thicknesses. Any type of bipolar plate material can be used (both hard and soft). The most unique feature of the S-cell is that it can be operated with or with-out bipolar plates, there is no equivalent on the market of flow battery test cells. Performance tests have shown that area specific resistances down to about 0.60 Ωcm2 can be obtained, i.e. the cell design does have an influence on the intrinsic cell performance. If other active areas than 5 cm x 5 cm are needed, please make a request.

Some of the unique features of the S-cell are

• Can be operated with or with-out bipolar plates – no other products on the market can do this
• Cell potential can be measured directly on bipolar plates – hereby intrinsic cell performance is measured and does not include contact resistances to current collectors
• Can be connected with Flow Through Electrode Holder (Flow through electrode holder) for e.g. inline monitoring of pH, ORP, reference, conductivity or any other electrode.
• Can be connected the Differential Pressure Unit (Differential pressure unit) for measurement of electrode hydraulic resistance
• Signals from pressure sensors and electrodes can be recorded in AUX Unit, which combined form an extremely powerful tool for both optimisation studies or flow battery chemistry development.

The electrolyte is only in contact with flow block (graphite), spacers (PTFE, Viton or EPDM), O-ring (Viton/EPDM), bipolar plate, electrode and membrane. The S-cell is intended for optimisation studies, but can also be used a normal flow battery test cell like the A-cell.

Specifications:

• Active Area: 5 cm x 5 cm OR 2.5 cm x 2.5 cm – for other dimension, please make a request
• Only works with electrodes > 0.1-0.2 mm (depending on electrode material and flow rate)
• Body made out of Graphite – for other materials, please make a request
• Stainless steel end plates
• Gold plated cobber current collectors
• Swagelok fittings for tight connecting to  1/8” tubing – for other tube dimensions, please make a request
• Gaskets: See materials variations and thicknesses at Gasket/Spacers
• Comes ready-to-use as on pictures but without bipolar plates – bipolar plate CAD drawings or Cutting tools can be supplied
• Top-performance – With SGL carbon felt and FS950 membrane, polarisation curve gives ASR of 0.6-0.7 Ωcm2 – performance is not limited by cell design but limited by electrodes/membranes
• All round flow battery test kit

OTHER RESOURCES

• S-Cell Assembly Manual