Hernández-Gómez Ángel, Ramirez Victor, Guilbert Damien, Saldivar Belem
Department of Renewable Energy, Centro de Investigación Científica de Yucatán (CICY), Mérida 97205, Mexico.
Cátedras CONACYT, Ciudad de México P.C. 03940, Mexico.
Membranes (Basel). 2021 May 22;11(6):379. doi: 10.3390/membranes11060379.
The self-discharge phenomenon results in a decrease of the open-circuit voltage (OCV), which occurs when an electrochemical device is disconnected from the power source. Although the self-discharge phenomenon has widely been investigated for energy storage devices such as batteries and supercapacitors, no previous works have been reported in the literature about this phenomenon for electrolyzers. For this reason, this work is mainly focused on investigating the self-discharge voltage that occurs in a proton exchange membrane (PEM) electrolyzer. To investigate this voltage drop for modeling purposes, experiments have been performed on a commercial PEM electrolyzer to analyze the decrease in the OCV. One model was developed based on different tests carried out on a commercial-400 W PEM electrolyzer for the self-discharge voltage. The proposed model has been compared with the experimental data to assess its effectiveness in modeling the self-discharge phenomenon. Thus, by taking into account this voltage drop in the modeling, simulations with a higher degree of reliability were obtained when predicting the behavior of PEM electrolyzers.
自放电现象会导致开路电压（OCV）下降，这种现象发生在电化学装置与电源断开连接时。尽管对于电池和超级电容器等储能装置的自放电现象已经进行了广泛研究，但文献中尚未有关于电解槽这种现象的报道。因此，这项工作主要专注于研究质子交换膜（PEM）电解槽中出现的自放电电压。为了出于建模目的研究这种电压降，已在商用PEM电解槽上进行实验，以分析OCV的下降情况。基于在一台商用400W PEM电解槽上进行的不同测试，开发了一个自放电电压模型。将所提出的模型与实验数据进行了比较，以评估其在模拟自放电现象方面的有效性。因此，通过在建模中考虑这种电压降，在预测PEM电解槽的行为时获得了可靠性更高的模拟结果。
