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固体高分子形水電解における軟水利用を想定した膜電極接合体へのイオン選択透過性の付与 Ionic Permselectivity on Membrane Electrode Assembly for Use of Soft Water on Polymer Electrolyte Membrane Water Electrolysis 吉村, 玲冶 ヨシムラ, リョウヤ Yoshimura, Ryoya 00377441 西岡, 賢祐 ニシオカ, ケンスケ Nishioka , Kensuke 西岡 ニシオカ Nishioka 賢祐 ケンスケ Kensuke 宮崎大学 University of Miyazaki 90264366 鈴木, 祥広 スズキ, ヨシヒロ Suzuki, Yoshihiro 鈴木 スズキ Suzuki 祥広 ヨシヒロ Yoshihiro 宮崎大学 University of Miyazaki PEM water electrolysis Divalent ion Degradation MEA Permselectivity It is known that metal ions in feed water have a detrimental effect on a polymer electrolyte membrane (PEM) water electrolyzer. In this investigation, we analyzed the effect of Soft water, containing Na+, Mg2+, K+, Ca2+ as main components, as feed water on the PEM single cell. The results showed that metal ions in Soft water caused the cell performance degradation and especially divalent cation such as Mg2+, Ca2+ had a stronger impact on a membrane electrode assembly (MEA). Based on the effect of divalent cation, we attempted to apply ionic permselctivity to the MEA to suppress the adsorption of metal ions. It was able to have permselectivity after immersing the MEA in polyethyleneimine solution. Furthermore, before immersing the solution, the dry MEA gave a stronger permselectivity. 宮崎大学工学部 Faculty of Engineering, University of Miyazaki 2022-11-30 jpn departmental bulletin paper VoR http://hdl.handle.net/10458/0002000026 https://miyazaki-u.repo.nii.ac.jp/records/2000026 https://www.miyazaki-.ac.jp/tech/research/memoirs/ 宮崎大学工学部 AA00732558 05404924 宮崎大学工学部紀要 Memoirs of Faculty of Engineering, University of Miyazaki 51 181 184 https://miyazaki-u.repo.nii.ac.jp/record/2000026/files/No51PP181-184.pdf application/pdf 2022-12-07