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説明:

The sodium-rich antiperovskites (NaRAPs) with composition Na3OB (B = Br, Cl, I, BH4, etc.) are a family of
materials that has recently attracted great interest for application as solid electrolytes in sodium metal batteries. Non-Arrhenius ionic conductivities have been reported for these materials, the origin of which is poorly understood. In this work, we combined temperature-resolved bulk and local characterisation methods to gain an insight into the origin of this unusual behaviour using Na3OBr as a model system. We first excluded crystallographic disorder on the anion sites as the cause of the change in activation energy;
then identified the presence of a poorly crystalline Na2O2 impurity, not detectable by XRD, and elucidated its effect on ionic conductivity. These findings will be of significant practical value to researchers attempting to improve the ionic conductivity of NaRAPs.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Solid-state battery, Sodium ion conductor, Antiperovskites

刊行年月日: 2023-12-18

出版者: Wiley

掲載誌:

• Angewandte Chemie International Edition (ISSN: 00448249) vol. 62 issue. 51 e202314444

研究助成金:

• Faraday Institution FIRG056
• Engineering and Physical Sciences Research Council
• Biotechnology and Biological Sciences Research Council EP/T015063/1
• Biotechnology and Biological Sciences Research Council EP/R029946/1
• University of Warwick
• Advantage West Midlands Birmingham Science City Advanced Materials Projects 1 and 2
• European Regional Development Fund
• Science and Technology Facilities Council CY29776
• Science and Technology Facilities Council CM31137
• Henry Royce Institute EP/R010145/1
• H2020 European Research Council Advanced Grant 788144
• Lembaga Pengelola Dana Pendidikan

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1002/anie.202314444

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更新時刻: 2024-12-04 14:52:54 +0900

MDRでの公開時刻: 2024-12-04 14:52:54 +0900