Fast Li-ion Conductor of Li3HoBr6 for Stable All-Solid-State Lithium-Sulfur Battery

被引：75
作者：
Shi, Xiaomeng [1 ]
Zeng, Zhichao [1 ]
Sun, Mingzi [2 ]
Huang, Bolong [2 ]
Zhang, Hongtu [1 ]
Luo, Wei [3 ]
Huang, Yunhui [3 ]
Du, Yaping [1 ]
Yan, Chunhua [1 ,4 ,5 ]
机构：
[1] Nankai Univ, Ctr Rare Earth & Inorgan Funct Mat, Tianjin Key Lab Rare Earth Mat & Applicat, Sch Mat Sci & Engn,Natl Inst Adv Mat, Tianjin 300350, Peoples R China
[2] Hong Kong Polytech Univ, Dept Appl Biol & Chem Technol, Hong Kong 999077, Peoples R China
[3] Tongji Univ, Inst New Energy Vehicles, Sch Mat Sci & Engn, Shanghai 201804, Peoples R China
[4] Peking Univ, State Key Lab Rare Earth Mat Chem & Applicat, PKU HKU Joint Lab Rare Earth Mat & Bioinorgan Che, Coll Chem & Mol Engn,Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China
[5] Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China
来源：
NANO LETTERS | 2021年 / 21卷 / 21期
基金：
国家重点研发计划;
关键词：
Rare Earth; Solid Halide Electrolyte; Li3HoBr6; Out-of-Plane Diffusion; Lithium-Sulfur Battery; ELECTROLYTES;
D O I：
10.1021/acs.nanolett.1c03573
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Rare-earth (RE) solid-state halide electrolytes have been extensively studied recently in the field of lithium (Li) ion all-solid-state batteries (ASSBs) due to their excellent electrochemical performances. Herein, a new RE-based solid halide electrolyte Li3HoBr6 (LHB) has been synthesized and exhibits high Li ion conductivity up to mS cm(-1) at room temperature. Theoretical calculations have identified four different Li ion migration pathways, in which the out-of-plane pathways are much more favorable than the direct in-plane pathways. In addition, LHB has a wider electrochemical window in comparison to a sulfide solid electrolyte and good deformability. The LHB-based Li-sulfur ASSB assembled by cold pressing can exhibit good cycling stability with high Coulombic efficiency, which shows that LHB has potential application in ASSBs.
引用
收藏
页码：9325 / 9331
页数：7
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