Crystalline precursor derived from Li3PS4 and ethylenediamine for ionic conductors

被引：6

作者：

Kimura, Takuya ^{[1
]}

Ito, Akane ^{[1
]}

Nakano, Takumi ^{[1
]}

Hotehama, Chie ^{[1
]}

Kowada, Hiroe ^{[1
]}

Sakuda, Atsushi ^{[1
]}

Tatsumisago, Masahiro ^{[1
]}

Hayashi, Akitoshi ^{[1
]}

机构：

[1] Osaka Metropolitan Univ, Osaka Prefecture Univ, Grad Sch Engn, Dept Appl Chem,Naka Ku, 1-1 Gakuen Cho, Sakai, Osaka 5998531, Japan

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2022年 / 104卷 / 03期

关键词：

Solid electrolytes; Liquid-phase synthesis; Sulfide; Lithium ionic conductor; Li3PS4; Crystal structure; THIO-LISICON; 3-DIMENSIONAL VISUALIZATION; STRUCTURAL-CHARACTERIZATION; SOLID ELECTROLYTES; CHEMICAL-SYNTHESIS; LI2S-P2S5; GLASSES; LITHIUM; LI7P3S11; CONDUCTIVITY; MECHANISM;

D O I：

10.1007/s10971-022-05824-x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Liquid-phase syntheses of sulfide materials are attractive for the mass production of solid electrolytes for all-solid-state batteries. In liquid-phase synthesis, the precursor of the solid electrolyte is obtained. The precursors are important for producing electrolytes of the same quality because they decompose into electrolytes by heat treatment. However, only a few studies have focused on the formation mechanism and structure of precursors. This study proposes a formation mechanism for Li3PS4 during liquid-phase synthesis using ethylenediamine (EDA) as a solvent and clarifies the crystal structure of Li3PS4 center dot NH2CH2CH2NH2 (Li3PS4 center dot EDA). Raman spectroscopy and nuclear magnetic resonance revealed that intermediate P2S62- units were generated in the EDA solution. Crystal structure analysis of Li3PS4 center dot EDA showed that the terminal nitrogen atom of EDA coordinates with two lithium atoms. Ionic conductivity of Li3PS4 center dot EDA was 2.8 x 10(-9) S cm(-1) at 25 degrees C. The analysis of precursors of solid electrolytes provides insight into the behavior of solvent molecules as ligands in the synthesis of sulfide electrolytes. [GRAPHICS] .

引用

页码：627 / 634

页数：8

共 52 条

[1] CRYSTAL-STRUCTURES OF CIS-BIS(ETHYLENEDIAMINE) AND TRANS-BIS(ETHYLENEDIAMINE)-DINITROCOBALT(III) NITRATE [J].