Sol–gel synthesis and electrical properties of sodium ion conducting solid electrolyte with Na5YSi4O12-type structure
Naohiro Horiuchi,
Kaede Ryu,
Akiko Nagai,
Toshinori Okura,
Kimihiro Yamashita
Affiliations
Naohiro Horiuchi
Department of Inorganic Biomaterials, Institute of Biomaterial & Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda, Tokyo, 101-0062, Japan; Corresponding author.
Kaede Ryu
Department of Applied Chemistry, School of Advanced Engineering, Kogakuin University, 2665-1 Nakano, Hachioji, Tokyo, 192-0015, Japan
Akiko Nagai
Department of Inorganic Biomaterials, Institute of Biomaterial & Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda, Tokyo, 101-0062, Japan
Toshinori Okura
Department of Applied Chemistry, School of Advanced Engineering, Kogakuin University, 2665-1 Nakano, Hachioji, Tokyo, 192-0015, Japan; Corresponding author.
Kimihiro Yamashita
Department of Inorganic Biomaterials, Institute of Biomaterial & Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda, Tokyo, 101-0062, Japan; Department of Applied Chemistry, School of Advanced Engineering, Kogakuin University, 2665-1 Nakano, Hachioji, Tokyo, 192-0015, Japan; Strategic Innovation and Research Center of Material and Science, Teikyo University, 2-11-1 Kaga, Itabashi, Tokyo, 173-8605, Japan
Sodium ion conductor with the composition of Na4.0Y0.6P0.2Si2.8O9 was prepared using a sol-gel method (polymerized complex method). The homogeneous gel was prepared by dissolving citric acid and ethylene glycol in mixtures of water solutions of metal salts. Drying the gel provides the uniform precursor. The sintered pellet obtained from the precursor had a single crystalline phase of Na5YSi4O12-type structure and exhibited ionic conductivity of 3.7 × 10−2 S/cm at 300 °C.
