Mechanical Properties of Li2S-P2S5 Glasses with Lithium Halides and Application in All-Solid-State Batteries
Mechanical Properties of Li2S-P2S5 Glasses with Lithium Halides and Application in All-Solid-State Batteries
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DOI：
10.1021/acsaem.7b00140
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发表时间：
2018-03-01
影响因子：
6.4
通讯作者：
Tatsumisago, Masahiro
中科院分区：
文献类型：
--
作者：
Kato, Atsutaka;Yamamoto, Mirai;Tatsumisago, Masahiro
固体电解质的机械性能和离子导电性对于实现具有大容量和长循环寿命的全固态电池是重要的。在这项研究中，它表明，锂卤化物，特别是LiI，锂2S-P2 S5玻璃，表现出高的离子电导率和良好的机械性能。机械性能，如杨氏模量和粉末压实的可成形性，评价固体电解质。卤化锂的加入降低了电解质的杨氏模量。此外，在含有卤化锂的Li 2S-P2 S5玻璃的粉末压制颗粒中观察到较少的孔隙和晶界。与不含卤化锂的电池相比，使用Si电极和玻璃电解质的全固态电池表现出20次循环的更大容量。这些结果为从固体电解质的机械性能的角度构建全固态电池提供了指导。
Mechanical properties of solid electrolytes are important as well as ionic conductivity to achieve all-solid-state batteries with large capacities and long cycle life. In this study, it is shown that Li2S-P2S5 glasses with lithium halides, especially LiI, exhibit both high ionic conductivity and favorable mechanical properties. Mechanical properties, such as Young's modulus and formability at powder compaction, are evaluated for the solid electrolytes. The addition of lithium halides decreases the Young's modulus of the electrolytes. In addition, fewer pores and grain boundaries were observed in the powder-pressed pellets of Li2S-P2S5 glasses with lithium halides. All-solid-state batteries using Si electrodes and glass electrolytes with lithium halides exhibited a larger capacity of 20 cycles compared to those without lithium halides. These results provide guidelines for the construction of all-solid-state batteries from the viewpoint of the mechanical properties of solid electrolytes.