Hydride-based antiperovskites with soft anionic sublattices as fast alkali ionic conductors.
Hydride-based antiperovskites with soft anionic sublattices as fast alkali ionic conductors.
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DOI：
10.1038/s41467-020-20370-2
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发表时间：
2021-01-08
影响因子：
16.6
通讯作者：
Kageyama H
中科院分区：
文献类型：
--
作者：
Gao S;Broux T;Fujii S;Tassel C;Yamamoto K;Xiao Y;Oikawa I;Takamura H;Ubukata H;Watanabe Y;Fujii K;Yashima M;Kuwabara A;Uchimoto Y;Kageyama H
Most solid-state materials are composed of p-block anions, only in recent years the introduction of hydride anions (1s2) in oxides (e.g., SrVO2H, BaTi(O,H)3) has allowed the discovery of various interesting properties. Here we exploit the large polarizability of hydride anions (H–) together with chalcogenide (Ch2–) anions to construct a family of antiperovskites with soft anionic sublattices. The M3HCh antiperovskites (M = Li, Na) adopt the ideal cubic structure except orthorhombic Na3HS, despite the large variation in sizes of M and Ch. This unconventional robustness of cubic phase mainly originates from the large size-flexibility of the H– anion. Theoretical and experimental studies reveal low migration barriers for Li+/Na+ transport and high ionic conductivity, possibly promoted by a soft phonon mode associated with the rotational motion of HM6 octahedra in their cubic forms. Aliovalent substitution to create vacancies has further enhanced ionic conductivities of this series of antiperovskites, resulting in Na2.9H(Se0.9I0.1) achieving a high conductivity of ~1 × 10–4 S/cm (100 °C). Oxide-based lithium/sodium-rich antiperovskites are regarded as promising solid electrolytes. Here, authors report a series of antiperovskites with a soft lattice containing hydride (H–) and chalcogenide (S2–, Se2–, Te2–) anions, enabling the fast Li+ /Na+ transport assisted by rotational phonon modes.
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影响因子：
15
作者：
Broux, Thibault;Ubukata, Hiroki;Kageyama, Hiroshi
通讯作者：
Kageyama, Hiroshi
影响因子：
15
作者：
Kraft, Marvin A.;Culver, Sean P.;Zeier, Wolfgang G.
通讯作者：
Zeier, Wolfgang G.
DOI：
10.1002/anie.199115471
发表时间：
1991-12-01
期刊：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH
影响因子：
--
作者：
JANSEN, M
通讯作者：
JANSEN, M
影响因子：
--
作者：
Goldschmidt, VM
通讯作者：
Goldschmidt, VM
影响因子：
8.6
作者：
Hanghofer, Isabel;Redhammer, Guenther J.;Rettenwander, Daniel
通讯作者：
Rettenwander, Daniel