Development of novel solid electrolytes and their application to gas sensors

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  • TAMURA Shinji
    Department of Applied Chemistry, Graduate School of Engineering, Osaka University

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<p>Various kinds of conducting ion species in solids have been discovered by selecting the NASICON-type three-dimensional network structure. By introducing high-valence Nb5+ into NASICON-type solids, both the thermal stability and crystallinity of NASICON-type trivalent cation conductors were simultaneously improved, leading to 13 kinds of trivalent cations that were newly reported to migrate in solids. In addition, highly selective low-temperature operative gas sensors were successfully fabricated using the (Al0.2Zr0.8)20/19Nb(PO4)3 solid, which possesses a high trivalent cation conductivity of over 10−4 S·cm−1 at 600 °C, as well as high thermal and chemical stabilities.</p>

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