A comparison between flow-through and flow-by porous electrodes for redox energy storage

James A Trainham, John Newman

Research output: Contribution to journalArticle

33 Citations (Scopus)


An economic comparison is made between electrode configurations for flow redox battery applications: (i) the flow-through configuration (current parallel to the fluid flow) and (ii) the flow-by configuration (current perpendicular to the fluid flow). Steady-state computer models are developed for each electrode system. These models are used to predict current density, cell voltage, and power density over a complete cycle (charge and discharge). The economic comparison is made by optimizing each configuration with respect to an objective function appropriate for redox battery applications. Only the variable costs are considered. The results of the optimization show that the flowbby configuration is superior. The flow-through configuration not only yields a lower return on investment, but it is impractical due to a requirement of extremely low flow rates (Re <0.001). Its failure is due to current flow (and ohmic potential drop) in the same direction as the fluid flow.

Original languageEnglish
Pages (from-to)455-469
Number of pages15
JournalElectrochimica Acta
Issue number4
Publication statusPublished - 1981


ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

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