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Author: Wessling, Matthias × Start date: 1999 × DDC: 540 × Type: Article × Type: Text × Publisher: Weinheim : Wiley-VCH × Subject: conductive static mixer × Subject: slurry electrode ×

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    A Tubular Electrochemical Reactor for Slurry Electrodes
    (Weinheim : Wiley-VCH, 2020) Percin, Korcan; Zoellner, Oliver; Rall, Deniz; Wessling, Matthias
    The research on electrochemical reactors is mostly limited to planarly designed modules. In this study, we compare a tubular and a planar electrochemical reactor for the utilization of the slurry electrodes. Cylindrical formed geometries demonstrate a higher surface-to-volume ratio, which may be favorable in terms of current density and volumetric power density. A tubular shaped electrochemical reactor is designed with conductive static mixers to promote the slurry particle mixing, and the vanadium redox flow battery is selected as a showcase application. The new tubular design presents similar cell resistances to the previously designed planar battery and shows increased discharge polarization behavior up to 100 mA cm−2. The volumetric power density reaches up to 30 mW cm−3, which is two times higher than that of the planar one. The battery performance is further investigated and 85 % coulombic, 70 % voltage and 60 % energy efficiency is found at 15 mA cm−2 with 15 wt.% slurry content. © 2020 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.