Stabilization of a high H−-conducting phase via K doping of Ba–Li oxyhydride

Kei Okamoto; Fumitaka Takeiri; Yumiko Imai; Masao Yonemura; Takashi Saito; Kazutaka Ikeda; Toshiya Otomo; Takashi Kamiyama; Genki Kobayashi

doi:10.1039/D2TA06278J

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Stabilization of a high H⁻-conducting phase via K doping of Ba–Li oxyhydride†

Kei Okamoto,

^abc Fumitaka Takeiri,

^abcd Yumiko Imai,^c Masao Yonemura,

^ef Takashi Saito,

^ef Kazutaka Ikeda,

^ef Toshiya Otomo,

^ef Takashi Kamiyama

^ef and Genki Kobayashi

*^ab

Author affiliations

* Corresponding authors

^a Solid State Chemistry Laboratory, Cluster for Pioneering Research (CPR), RIKEN, Wako 351-0198, Japan
E-mail: genki.kobayashi@riken.jp

^b Department of Materials Molecular Science, Institute for Molecular Science, Okazaki 444-8585, Japan

^c Department of Structural Molecular Science, School of Physical Sciences, SOKENDAI (The Graduate University for Advanced Studies), Okazaki 444-8585, Japan

^d Japan Science and Technology Agency (JST), Precursory Research for Embryonic Science and Technology (PRESTO), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan

^e Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Ibaraki 305-0801, Japan

^f Department of Materials Structure Science, School of High Energy Accelerator Science, SOKENDAI (The Graduate University for Advanced Studies), Ibaraki 305-0801, Japan

Abstract

We report aliovalent partial substitution of Ba with K in Ba–Li oxyhydride, which exhibits a high H⁻ conductivity caused by structural phase transitions. The phase transition temperatures were decreased by approximately 50 °C via 15% K/Ba substitution, resulting in a high conductivity at lower temperatures.

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Article information

DOI: https://doi.org/10.1039/D2TA06278J
Article type: Communication
Submitted: 08 Aug 2022
Accepted: 17 Oct 2022
First published: 18 Oct 2022

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J. Mater. Chem. A, 2022,10, 23023-23027

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Stabilization of a high H⁻-conducting phase via K doping of Ba–Li oxyhydride

K. Okamoto, F. Takeiri, Y. Imai, M. Yonemura, T. Saito, K. Ikeda, T. Otomo, T. Kamiyama and G. Kobayashi, J. Mater. Chem. A, 2022, 10, 23023 DOI: 10.1039/D2TA06278J

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Journal of Materials Chemistry A