Jung, Hye Young Jun, Yongseok Lee, Kwan-Young Park, Hyun S. Cho, Sung Ki Jang, Jong Hyun 2024-01-19T09:01:56Z 2024-01-19T09:01:56Z 2023-08-31 2023-08 2093-8551 https://pubs.kist.re.kr/handle/201004/113406 Currently, spray coating has attracted interest in the mass production of anode catalyst layers for proton exchange mem-brane water electrolysis (PEMWE). The solvent in the spray ink is a critical factor for the catalyst dispersion in ink, the microstructure of the catalyst layer, and the PEMWE performance. Herein, various pure organic solvents were examined as a substitute for conventional isopropanol-deionized water (IPA-DIW) mixture for ink solvent. Among the polar solvents that exhibited better IrO  dispersion over nonpolar solvents, 2-butanol (2-BuOH) was selected as a suitable candidate. The PEMWE single cells were fabricated using 2-BuOH at various ionomer contents, spray nozzle types, and drying tem-peratures, and their performance was compared to the cells fabricated using a conventional IPA-DIW mixture. The PEMWE single cells with 2-BuOH solvent showed good performances comparable to the conventional IPA-DIW mixture case and highly durable performances under accelerated degradation tests. English The Korean Electrochemical Society Comparative Study on the Organic Solvent of IrO2-Ionomer Inks used for Spray Coating of Anode for Proton Exchange Membrane Water Electrolysis Article 10.33961/jecst.2023.00185 1 Journal of Electrochemical Science and Technology, v.14, no.3, pp.283 - 292 Journal of Electrochemical Science and Technology 14 3 283 292 Y scie scopus 001046020900009 2-s2.0-85165993507 Electrochemistry Electrochemistry Article HYDROGEN-PRODUCTION PERFORMANCE ELECTRODES IRIDIUM Polymer electrolyte membrane water electrolysis Spray coating Ink Pure organic solvent 2-butanol