Sodium ionic conduction in complex hydrides with [BH 4] - and [NH 2] - anions

Motoaki Matsuo, Shingo Kuromoto, Toyoto Sato, Hiroyuki Oguchi, Hitoshi Takamura, Shin Ichi Orimo

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67 Citations (Scopus)


We report the experimental results of structural and sodium ionic conductive properties of the Na(BH 4)-Na(NH 2)-NaI system. Na(BH 4) 0.5(NH 2) 0.5 with [BH 4] - and [NH 2] - complex anions formed by combining Na(BH 4) and Na(NH 2) complex hydrides shows the most superior sodium ionic conductivity of 2 × 10 -6 S/cm at 300 K because of the specific antiperovskite-type structure with vacancies in the Na + site Furthermore, Na(BH 4) 0.5(NH 2) 0.5 shows a high electrochemical stability of at least 6 V (vs Na +/Na). The result suggests that Na(BH 4) 0.5(NH 2) 0.5 could be a potential candidate for solid electrolyte.

Original languageEnglish
Article number203904
JournalApplied Physics Letters
Issue number20
Publication statusPublished - 2012 May 14
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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