Configuring PSx tetrahedral clusters in Li-excess Li7P3S11 solid electrolyte

被引：12
作者：
Jung, Wo Dum [1 ,2 ]
Yun, Bin-Na [3 ]
Jung, Hun-Gi [3 ]
Choi, Sungjun [1 ]
Son, Ji-Won [1 ]
Lee, Jong-Ho [1 ]
Lee, Jong-Heun [2 ]
Kim, Hyoungchul [1 ]
机构：
[1] Korea Inst Sci & Technol, High Temp Energy Mat Res Ctr, 5 Hwarang Ro,14 Gil, Seoul 02792, South Korea
[2] Korea Univ, Dept Mat Sci & Engn, 145 Anam Ro, Seoul 02841, South Korea
[3] Korea Inst Sci & Technol, Ctr Energy Convergence, 5 Hwarang Ro,14 Gil, Seoul 02792, South Korea
来源：
APL MATERIALS | 2018年 / 6卷 / 04期
基金：
新加坡国家研究基金会;
关键词：
STATE BATTERIES; LITHIUM; CONDUCTORS;
D O I：
10.1063/1.5011105
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We demonstrate that the Li-ion conductivity can be improved by adding a certain amount of Li (x = 0.25-0.5) as a charge carrier to the composition of glass-ceramic Li7+ xP3S11. Structural analysis clarified that the structural changes caused by the ratio of ortho-thiophosphate tetrahedra PS43- and pyro-thiophosphate ditetrahedra P(2)S(7)4(-) affect the Li-ion conductivity. The ratio of PS43- and P2S74- varies depending on x and the highest Li-ion conductivity (2.5 x 10(-3) S cm(-1)) at x = 0.25. All-solidstate LiNi0.8Co0.15Al0.05O2/Li7.25P3S11/In-metal cell exhibits the discharge capacity of 106.2 mAh g(-1). This ion conduction enhancement from excess Li is expected to contribute to the future design of sulfide-type electrolytes. (C) 2018 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license.
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页数：6
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