用于测定碱性水电解中隔膜欧姆贡献的简单精确方法。

Simple and Precise Approach for Determination of Ohmic Contribution of Diaphragms in Alkaline Water Electrolysis.

作者信息

Rodríguez Jesús, Palmas Simonetta, Sánchez-Molina Margarita, Amores Ernesto, Mais Laura, Campana Roberto

机构信息

Centro Nacional del Hidrógeno (CNH2). Prolongación Fernando El Santo s/n, 13500 Puertollano, Ciudad Real, Spain.

Dipartimento di Ingegneria Meccanica, Chimica e dei Materiali, Università degli studi di Cagliari, Via Marengo 2, 09123 Cagliari, Italy.

出版信息

Membranes (Basel). 2019 Oct 4;9(10):129. doi: 10.3390/membranes9100129.

DOI:10.3390/membranes9100129

PMID:31590320

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6835761/

Abstract

A simple and low-cost alternating current (AC)-based method, without electrolyte correction, is proposed (Electrochemical Impedance Spectroscopy (EIS)-Zero Gap Cell) for the determination of ohmic contribution of diaphragms. The effectiveness of the proposed methodology was evaluated by using a commercial Alkaline Water Electrolysis (AWE) diaphragm (Zirfon®). Furthermore, the results were compared with two conventional electrochemical methodologies for calculating the separator resistance, based on direct current (DC), and AC measurements, respectively. Compared with the previous techniques, the proposed approach reported more accurate and precise values of resistance for new and aged samples. Compared with the manufacturer reference, the obtained error values for new samples were 0.33%, 5.64%, and 41.7%, respectively for EIS-Zero gap cell, AC and DC methods, confirming the validity and convenience of the proposed technique.

摘要

本文提出了一种简单且低成本的基于交流电（AC）的方法（电化学阻抗谱（EIS）-零间隙电池），用于测定隔膜的欧姆贡献，该方法无需进行电解质校正。通过使用商用碱性水电解（AWE）隔膜（Zirfon®）评估了所提出方法的有效性。此外，将结果分别与基于直流（DC）测量和交流（AC）测量的两种用于计算隔膜电阻的传统电化学方法进行了比较。与先前技术相比，所提出的方法报告了新样品和老化样品更准确和精确的电阻值。与制造商参考值相比，对于新样品，EIS-零间隙电池法、交流法和直流法获得的误差值分别为0.33%、5.64%和41.7%，证实了所提出技术的有效性和便利性。