[16a-A31-1~9] 6.3 Oxide electronics

[16a-A31-5] EXAFS analysis of solid solution of layered oxides

〇(M2)Shota Akama¹, Kaoru Amaha¹, Wataru Kobayashi^1,2,3, Hideharu Niwa^1,2,3, Yutaka Moritomo^1,2,3 (1.Grad. Sch. Pure and Appl. Sci., Univ. Tsukuba, 2.Fac. Pure and Appl. Sci., Univ. Tsukuba, 3.CiRfSE)

Keywords:sodium-ion-secondary battery, Extended X-ray Absorption Fine Structure, local structure

Layered oxide Na_xMO₂ (M:transition metal) is a typical electrode material for sodium-ion-secondary battery. We prepared powders of partially M'-substituted P2-type Na_x(M,M')O₂ and O3-type Na(M,M')O₂ (M, M' = Mn, Fe, Co), and investigated local structure of M and M' ions using synchrotron x-ray diffraction and EXAFS (Extended X-ray Absorption Fine Structure) analysis.