Tracing Resistances of Anion Exchange Membrane Water Electrolyzer during Long-term Stability Tests

Autor:	Atif Khan Niaz, Woong Lee, SeungCheol Yang, Hyung-Tae Lim
Rok vydání:	2021
Předmět:	Electrolysis Membrane Materials science Ion exchange Electrolysis of water Chemical engineering law Electrochemistry Tracing law.invention Term (time)
Zdroj:	Journal of Electrochemical Science and Technology. 12:358-364
ISSN:	2288-9221 2093-8551
DOI:	10.33961/jecst.2021.00094
Popis:	In this study, an anion exchange membrane water electrolysis (AEMWE) cell was operated for ~1000 h at a voltage bias of 1.95 V. Impedance spectra were regularly measured every ~ 100 h, and changes in the ohmic and non-ohmic resistance were traced as a function of time. While there was relatively little change in the I–V curves and the total cell resistance during the long-term test, we observed various electrochemical phenomena in the cell: 1) initial activation with a decrease in both ohmic and non-ohmic resistance; 2) momentary and non-permanent bubble resistance (non-ohmic resistance) depending on the voltage bias, and 3) membrane degradation with a slight increase in the ohmic resistance. Thus, the regular test protocol used in this study provided clear insights into the performance degradation (or improvement) mechanism of AEMWE cells.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ddd3c2c1130a86be5cb4b81eec04bc1b https://doi.org/10.33961/jecst.2021.00094 Zobrazit plný text záznamu