[16a-K203-1~9] 6.3 Oxide electronics

9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation AwardEnglish Presentation

[16a-K203-2] Epitaxial growth of Ba-substituted SrCoO_2.5 films and their electrochemical protonation

〇(D)Lingling Xie¹, Takuya Majima², Yuichi Shimakawa¹, Daisuke Kan¹ (1.ICR., Kyoto Univ., 2.Dep. Nuc. Eng., Kyoto Univ.)

Keywords:

Electrochemical protonation,Epitaxial thin films,(BaxSr1-x)CoO2.5

The brownmillerite strontium cobaltite SrCoO_2.5 (SCO) with an ordered arrangement of oxygen vacancies can accommodate hydrogen (or protons) electrochemically even at room temperature, offering a platform for investigating proton diffusion and accommodation in solids. While proton accumulation and protonation of epitaxial films of SCO have been established, the influence of substitutions of Sr²⁺ by divalent cations remains unexplored. Given that cation substitutions modify SCO lattices and oxygen vacancy arrangements, they are expected to affect proton accommodation and protonation of SCO.