Comparing Physical and Electrochemical Properties of Different Weave Patterns for Carbon Cloth Electrodes in Redox Flow Batteries

Four carbon cloth electrodes each with distinct morphologies that impact the mass transfer and pressure drop in a redox flow battery.

Scientific Achievement

In situ and ex situ characterization is combined with electrochemical analysis to elucidate mass transport and fluid dynamic relationships in carbon cloth electrodes with different weave patterns (plain, 8-satin harness, and 2×2 basket).

Significance and Impact

1071 HCB plain weave cloth electrode exhibits a favorable balance of hydrodynamic and polarization performance in non-aqueous flow battery with a kinetically-facile redox couple.

Research Details

  • Mercury intrusion porosity pore size distribution plots depict the unique microstructures for four woven materials. All cloth electrodes were fabricated from the same 7.5 µm diameter carbon fiber.
  • The electrochemical and fluid dynamic experiments were conducted in a single electrolyte flow cell architecture.
  • The hydrodynamics and the mass transfer comparison show that the plain weave pattern possesses a favorable structure for both phenomena.

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DOI: 10.1115/1.4046661

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