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.

中文翻译：

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用于浆料电极的管状电化学反应器。

电化学反应器的研究主要限于平面设计的模块。在这项研究中，我们比较了管状和平面电化学反应器对浆料电极的利用。圆柱形状的几何形状显示出更高的表面积体积比，这在电流密度和体积功率密度方面可能是有利的。设计了带有导电静态混合器的管状电化学反应器，以促进浆液颗粒的混合，并且选择钒氧化还原液流电池作为展示应用。新的管状设计呈现出与先前设计的平面电池相似的电池电阻，并显示了高达100 mA cm ^-2的增加的放电极化行为。体积功率密度高达30 mW cm ^-3，是平面飞机的两倍高。进一步研究了电池性能，发现在15 mA cm ^-2下具有15 wt。％的浆料含量时，有85％的库仑，70％的电压和60％的能量效率。