OCV Cell

The OCV Cell is a dedicated open-circuit-voltage and overpotential-measurement accessory for flow battery test setups, letting researchers decouple anode and cathode performance without redesigning the main cell. An internal reference electrolyte - vanadium or Zobell solution, depending on the chemistry under test - establishes a stable reference point so individual electrode overpotentials can be measured directly rather than inferred from full-cell voltage alone. Constructed with PEEK end plates and a stainless steel stand, only graphite and corrosion-resistant tubing contact the electrolyte.

• Individual Overpotential Measurement: Internal reference electrolyte enables direct anode and cathode overpotential measurement, not just total cell voltage.
• Chemistry-Matched Reference: Supports vanadium (V3+/V4+) or Zobell (ferro/ferricyanide) reference solutions depending on the electrolyte system.
• Corrosion-Resistant Wetted Parts: Only graphite and chemically resistant tubing contact the electrolyte for long-term reliability.
• Complete Accessory Bundle: Ships with a UV/Vis stainless steel holder and 2 mm banana plug wiring.
• Documented Methodology: Includes an assembly manual and a whitepaper on measuring overpotentials and liquid potentials in flow batteries.