Superionic Conductors: Li<sub>10+δ</sub>[Sn<sub><i>y</i></sub>Si<sub>1–<i>y</i></sub>]<sub>1+δ</sub>P<sub>2−δ</sub>S<sub>12</sub> with a Li<sub>10</sub>GeP<sub>2</sub>S<sub>12</sub>-type Structure in the Li<sub>3</sub>PS<sub>4</sub>–Li<sub>4</sub>SnS<sub>4</sub>–Li<sub>4</sub>SiS<sub>4</sub> Quasi-ternary System

DOI Web Site 被引用文献30件 参考文献22件
  • Yulong Sun
    Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, and ‡Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
  • Kota Suzuki
    Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, and ‡Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
  • Satoshi Hori
    Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, and ‡Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
  • Masaaki Hirayama
    Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, and ‡Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
  • Ryoji Kanno
    Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, and ‡Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan

書誌事項

公開日
2017-07-10
資源種別
journal article
DOI
  • 10.1021/acs.chemmater.7b00886
公開者
American Chemical Society (ACS)

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説明

Solid solutions of Sn–Si derivatives with an LGPS (Li10GeP2S12)-type structure are synthesized by a solid-state reaction in the Li3PS4–Li4SnS4–Li4SiS4 quasi-ternary system. The monophasic region of the LGPS-type structure deviates from the tie line between Li10SiP2S12 and Li10SnP2S12, and the composition of the solid solution is determined to be −0.1 ≤ δ ≤ 0.5 and 0 ≤ y ≤ 1.0 in Li10+δ[SnySi1–y]1+δP2−δS12 (0.50 ≤ x ≤ 0.7 and 0 ≤ y ≤ 1.0 in Li4–x[SnySi1–y]1–xPxS4). The solid solution is formed by a double substitution that changes the Sn/Si ratio and the M4+ (Sn4+ and Si4+)/P5+ ratio, which adjusts the sizes of the lithium conduction tunnels and the lithium concentration, and contributes to the optimal conductivity value. The highest ionic conductivity value of 1.1 × 10–2 S cm–1 is achieved for the composition of Li10.35[Sn0.27Si1.08]P1.65S12 (Li3.45[Sn0.09Si0.36]P0.55S4) at 298 K, which is close to the value for the original LGPS compound (1.2 × 10–2 S cm–1). The Ge-free solid electrolyte could be suitabl...

収録刊行物

  • Chemistry of Materials

    Chemistry of Materials 29 (14), 5858-5864, 2017-07-10

    American Chemical Society (ACS)

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