能够对流场板进行原位表征的分析型电解槽。

Analytical electrolyzer enabling operando characterization of flow plates.

作者信息

Wheeler Danika G, Virca Carolyn N, Berlinguette Curtis P

机构信息

Department of Chemical and Biological Engineering, The University of British Columbia, 2360 East Mall, Vancouver, British Columbia V6T 1Z3, Canada.

Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.

出版信息

Rev Sci Instrum. 2019 Jul;90(7):074103. doi: 10.1063/1.5053600.

DOI:10.1063/1.5053600

PMID:31370432

Abstract

We present an analytical electrolyzer with sensors embedded within flow plates to enable direct measurement of electrolyte temperatures and pressures in real time during water electrolysis. Flow plates with either parallel or serpentine channels and a total of eight equally spaced sensors were integrated into a flow cell containing a nickel foam gas diffusion layer and an anion exchange membrane. The temperature and pressure of the electrolyte in the channels increase relative to the inlet by as much as 7.3 °C and 11.5 kPa, respectively, during electrolysis at an applied current density of 200 mA cm. The measured increases in temperature and pressure differ depending on the flow plate geometry: A greater increase in temperature is observed in parallel flow plates, whereas the serpentine flow plate geometry results in greater variability in pressure. This work represents the first demonstration of an analytical flow cell capable of spatially resolved operando temperature and pressure sensing within the flow channels of a water electrolyzer.

摘要

我们展示了一种分析型电解槽，其流场板内嵌入了传感器，能够在水电解过程中实时直接测量电解液的温度和压力。带有平行或蛇形通道以及总共八个等间距传感器的流场板被集成到一个包含泡沫镍气体扩散层和阴离子交换膜的流动池中。在施加电流密度为200 mA/cm²进行电解时，通道内电解液的温度和压力相对于入口分别升高了多达7.3℃和11.5 kPa。测量到的温度和压力升高因流场板几何形状而异：平行流场板中观察到温度升高幅度更大，而蛇形流场板几何形状导致压力变化更大。这项工作首次展示了一种能够在水电解槽流道内进行空间分辨的原位温度和压力传感的分析型流动池。