Preparation and characterization of sodium-ion conductive Na3BS3 glass and glass?ceramic electrolytes
Preparation and characterization of sodium-ion conductive Na3BS3 glass and glass?ceramic electrolytes
复制标题
钠离子导电Na3BS3玻璃及微晶玻璃电解质的制备及表征
DOI：
10.1039/d0ma00777c
复制
发表时间：
2021
影响因子：
5
通讯作者：
Hayashi Akitoshi
中科院分区：
文献类型：
--
作者：
Tsuji Fumika;Nasu Akira;Hotehama Chie;Sakuda Atsushi;Tatsumisago Masahiro;Hayashi Akitoshi
为了寻找适合全固态钠电池的固体电解质，由PS4、SnS4和SbS4等四面体结构单元组成的硫化物电解质得到了广泛的研究。本文首次报道了具有三角形BS3单元的Na3BS3原硫代硼酸盐电解质的离子电导率。 Na3BS3 玻璃是通过机械化学过程从结晶 Na3BS3（单斜相）制备的。由于 B2S3 化合物不稳定，晶体 Na3BS3 是由 Na2S、B 和 S 的混合物预先合成的。通过 Na3BS3 玻璃的结晶，沉淀出新的三角 Na3BS3 亚稳相作为主相。所制备的玻璃陶瓷电解质表现出比单斜Na3BS3相更高的离子电导率。 Na3BS3玻璃的电导率最高，为1.1×10−5 S cm−1，高于传统Na3PS4玻璃。此外，Na3BS3玻璃表现出优于Na15Sn4负极的成型性和电化学稳定性。以 Na3BS3 玻璃作为电解质的全固态电池在 60 °C 下成功作为二次电池运行。结论是，具有三角形结构单元的Na3BS3玻璃具有作为固体电解质应用于全固态钠电池的合适性能。这项研究的结果扩展了对具有三角形BS3结构单元的多组分硫化物电解质的研究，并有助于全固态电池固体电解质的开发。
In order to find suitable solid electrolytes for all-solid-state sodium batteries, sulfide electrolytes composed of tetrahedral structural units such as PS4, SnS4 and SbS4 have been widely studied. In this paper, the ionic conductivities of Na3BS3ortho-thioborate electrolytes with triangular BS3 units are firstly reported. Na3BS3 glass was prepared via a mechanochemical process from crystalline Na3BS3 (monoclinic phase). The crystalline Na3BS3 was pre-synthesized from a mixture of Na2S, B, and S due to the instability of the B2S3 compound. A new metastable phase of trigonal Na3BS3 was precipitated as the primary phase by crystallization of the Na3BS3 glass. The prepared glass–ceramic electrolyte showed a higher ionic conductivity than the monoclinic Na3BS3 phase. The Na3BS3 glass showed the highest conductivity of 1.1 × 10−5 S cm−1, which was higher than that of conventional Na3PS4 glass. Futhermore, the Na3BS3 glass showed a superior formability and electrochemical stability to Na15Sn4 negative electrode. An all-solid-state cell with the Na3BS3 glass as an electrolyte successfully operated as a secondary battery at 60 °C. It is concluded that the Na3BS3 glass with triangular structural units has appropriate properties as a solid electrolyte for application to all-solid-state sodium batteries. The results of this study extend research on multi-component sulfide electrolytes with triangular BS3 structural units and contribute to the development of solid electrolytes for all-solid-state batteries.