Mg3(BH4)4(NH2)2 as Inorganic Solid Electrolyte with High Mg2+ Ionic Conductivity,ACS Applied Energy Materials

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Mg3(BH4)4(NH2)2 as Inorganic Solid Electrolyte with High Mg2+ Ionic Conductivity
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-06-24 00:00:00 , DOI: 10.1021/acsaem.0c00980
Ronan Le Ruyet _{1,

2} , Benoît Fleutot _{1,

2} , Romain Berthelot _{2,

3} , Yasmine Benabed _{4,

5} , Geoffroy Hautier ₄ , Yaroslav Filinchuk ₄ , Raphaël Janot _{1,

2}

Affiliation

Mg₃(BH₄)₄(NH₂)₂ compound was synthesized through the investigation of the Mg(BH₄)₂-Mg(NH₂)₂ phase diagram; its crystal structure was solved in a tetragonal unit cell with the space group I4̅. Interestingly, Mg₃(BH₄)₄(NH₂)₂ has a high thermal stability with a decomposition temperature above 190 °C and exhibits a high Mg²⁺ ionic conductivity of 4.1 × 10^–5 S·cm^–1 at 100 °C with a low activation energy (0.84 eV). The reversible Mg deposition/stripping was demonstrated at 100 °C when using Mg₃(BH₄)₄(NH₂)₂ as solid electrolyte. Thus, Mg₃(BH₄)₄(NH₂)₂ is a compound that could help to develop rechargeable Mg-ion solid-state batteries.

中文翻译：

Mg ₃（BH ₄）₄（NH ₂）₂作为具有高Mg ²⁺离子电导率的无机固体电解质

通过研究Mg（BH ₄）₂ -Mg（NH ₂）₂相图，合成了Mg ₃（BH ₄）₄（NH ₂）₂化合物；其晶体结构与所述空间群的四方单元电池解决了我4。有趣的是，Mg ₃（BH ₄）₄（NH ₂）₂具有较高的热稳定性，分解温度高于190°C，并且具有4.1×10 ^–5 S·cm ^–1的高Mg ²⁺离子电导率。在100°C下具有较低的活化能（0.84 eV）。当使用Mg ₃（BH ₄）₄（NH ₂）₂作为固体电解质时，在100°C时可逆的Mg沉积/剥离被证明。因此，Mg ₃（BH ₄）₄（NH ₂）₂是有助于开发可充电Mg离子固态电池的化合物。

更新日期：2020-06-24

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