Fabrication of C12A7 Particles for Ion Storage Application

Abstract

12CaO･7Al₂O₃ mayenite has positively charged cage which can encapsulate anions inside it. We have successfully synthesized mayenite from hydrogarnet precursor prepared by liquid phase method. In this study, mayenite particles have been fabricated with doped metals such as Sr and Si for ion storage application. Mayenite was obtained by heat treatment of hydrogarnet prepared with Sr or Si source in liquid phase method. C_12-xSr_xA₇ and Ca₂₄Al_14-xSixO₃₃ can be obtained using hydrogarnet precursor. The maximum amount of doped Sr was about 50 mol%, whereas that of doped Si was about 20 mol%. The SEM-EDX analysis indicated that Sr and Si were highly distributed in C12A7 particles.