Effect of excess Li2S on electrochemical properties of amorphous li3ps4 films synthesized by pulsed laser deposition

被引:21
作者
Quan, Zhen [1 ]
Hirayama, Masaaki [1 ]
Sato, Daichi [1 ]
Zheng, Yueming [1 ]
Yano, Taka-aki [1 ]
Hara, Kosuke [1 ]
Suzuki, Kota [1 ]
Hara, Masahiko [1 ]
Kanno, Ryoji [1 ]
机构
[1] Tokyo Inst Technol, Sch Mat & Chem Technol, Dept Chem Sci & Engn, Midori Ku, Yokohama, Kanagawa, Japan
基金
日本学术振兴会;
关键词
lithium ion conductivity; solid electrolyte; solid state batteries; thin-film; LITHIUM IONIC CONDUCTOR; SOLID-STATE BATTERY; THIO-LISICON; GLASS-CERAMICS; SYSTEM; ELECTROLYTE; LI2S-P2S5; OXIDE; INTERCALATION; INTERFACE;
D O I
10.1111/jace.14579
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
Amorphous Li3PS4 films were synthesized by pulsed laser deposition (PLD) at room temperature using Li3PS4 targets with excess lithium and sulfur. Raman and X-ray photoemission spectroscopies indicated that the Li3PS4 film synthesized with a stoichiometric amount of Li3PS4 target contained lithium-deficient phases such as Li4P2S6, Li2-xS and sulfur due to composition deviation caused during the ablation process. The film synthesized with a 14% Li2S-excess target (Li3.42PS4.21) contained fewer impurities, and exhibited a higher ionic conductivity of 5.3x10(-4)S/cm at 298K than the lithium-deficient film (3.1x10(-4)S/cm). The target composition is an important factor for the fabrication of highly conductive Li3PS4 films for electrolytes in thin-film batteries.
引用
收藏
页码:746 / 753
页数:8
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