Flow battery electrode thickness

How does electrode thickness affect flow battery performance?

The electrode thickness determines the flow battery performance through the available reaction surface area, the electrolyte distribution, and the ohmic, activation and mass transfer overpotentials. Increasing the electrode thickness by stacking commercial electrodes can be leveraged as a fast and inexpensive pathway to improve battery performance.

Does electrode thickness affect electrochemical and hydraulic performance of redox flow cells?

The effect of the electrode thickness on the electrochemical and hydraulic performance of redox flow cells is investigated.

Does electrode thickness affect cell performance?

The influence of the electrode thickness on the cell performance is investigated by stacking electrode layers (200–1100 μm) of two commercial off-the-shelf porous electrodes – Freudenberg carbon paper and ELAT carbon cloth – in combination with two prevailing flow field geometries – flow-through and interdigitated (Figure 1a ).

Do redox flow batteries need porous electrodes?

Correlations are elucidated between the electrode thickness, electrode microstructure and flow field geometry, highlighting the need to design porous electrodes for specific reactor architectures and operating conditions to enable high performance redox flow batteries.

Which electrode thickness should be used in RFBS?

To date, two predominant electrode thickness ranges have been implemented in RFBs. First, thick felts (1-6 mm in thickness) are a common choice in traditional flow battery designs, benefitting from high surface areas but suffering from bulkier reactors and inhomogeneous compression upon assembly .

Which electrode thickness and electrolyte flow rate is optimum power-based efficiency?

Our numerical study suggest that the VRFB with specific electrode thickness and electrolyte flow rate shows optimum power-based efficiency. We concluded that the maximum power-based efficiency of 96.8% was achieved at the electrolyte flow rate of 10 ml/min and electrode thickness of 1 mm.