High-performance anion-exchange membrane water electrolysis

• Published in: Electrochimica acta Vol. 295; pp. 99 - 106
• Main Authors: Park, Ji Eun, Kang, Sun Young, Oh, Seung-Hyeon, Kim, Jong Kwan, Lim, Myung Su, Ahn, Chi-Yeong, Cho, Yong-Hun, Sung, Yung-Eun
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.02.2019; Elsevier BV
• Subjects: Anion exchanging; Anion-exchange membrane water electrolysis; Charge transfer; Charge transport; Electrochemical impedance spectroscopy; Electrolysis; Hydrogen evolution reaction; Hydrogen evolution reactions; Membrane-electrode assembly; Oxygen evolution reaction; Oxygen evolution reactions; Parameters; Membrane-electrode assembly; Hydrogen evolution reaction; Oxygen evolution reaction; Anion-exchange membrane water electrolysis
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2018.10.143

In this study, we developed high-performance anion-exchange membrane water electrolysis (AEMWE) by investigating various parameters. To enhance AEMWE performance, the effects of the membrane-electrode assembly (MEA) fabrication method, operating conditions, and MEA parameters were examined. As a result of the optimization and the use of FAA-3-50 and FAA-3-Br as the AEM and anion-exchange ionomer, respectively, AEMWE showed the highest performance reported thus far. Single-cell tests and electrochemical impedance spectroscopy results indicate that optimized AEMWE minimized the ohmic, charge-transfer, and mass transport resistances. Overall, by examining the AEMWE parameters, we were able to improve the electrochemical reactions, namely, the oxygen evolution reaction and hydrogen evolution reaction, and achieved outstanding performance.