Electrical Double Layer Mechanism Analysis of PEM Water Electrolysis for Frequency Limitation of Pulsed Currents

Jae-Hoon Kim, Chang-Yeol Oh, Ki-Ryong Kim, Jong-Pil Lee and Tae-Jin Kim
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Jae-Hoon Kim: Power Conversion System Research Center, Korea Electrotechnology Research Institute (KERI), Changwon 51543, Korea
Chang-Yeol Oh: Power Conversion System Research Center, Korea Electrotechnology Research Institute (KERI), Changwon 51543, Korea
Ki-Ryong Kim: Power Conversion System Research Center, Korea Electrotechnology Research Institute (KERI), Changwon 51543, Korea
Jong-Pil Lee: Power Conversion System Research Center, Korea Electrotechnology Research Institute (KERI), Changwon 51543, Korea
Tae-Jin Kim: Power Conversion System Research Center, Korea Electrotechnology Research Institute (KERI), Changwon 51543, Korea

Energies, 2021, vol. 14, issue 22, 1-17

Abstract: This paper proposes a method for improving hydrogen generation using pulse current in a proton exchange membrane-type electrolyzer (PEMEL). Traditional methods of electrolysis using direct current are known as the simplest approach to produce hydrogen. However, it is highly dependent on environmental variables, such as the temperature and catalyst used, to enhance the rate of electrolysis. Therefore, we propose electrolysis using a pulse current that can apply several dependent variables rather than environmental variables. The proposed method overcomes the difficulties in selecting the frequency of the pulse current by deriving factors affecting hydrogen generation while changing the concentration generated by the cell interface during the pulsed water-electrolysis process. The correlation between the electrolyzer load and the frequency characteristics was analyzed, and the limit value of the applicable frequency of the pulse current was derived through electrical modeling. In addition, the operating characteristics of PEMEL could be predicted, and the PEMEL using the proposed pulse current was verified through experiments.

Keywords: electrolyzer (EL); electrical modeling; frequency limitation; proton exchange membrane-type electrolyzer (PEMEL); pulse current (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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