Highly Safe Ionic Liquid Electrolytes for Sodium-Ion Battery: Wide Electrochemical Window and Good Thermal Stability

被引：91
|
作者：
Wu, Feng [1 ,2 ]
Zhu, Na [1 ]
Bai, Ying [1 ]
Liu, Libin [1 ]
Zhou, Hang [1 ]
Wu, Chuan [1 ,2 ]
机构：
[1] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing Key Lab Environm Sci & Engn, Beijing 100081, Peoples R China
[2] Collaborat Innovat Ctr Elect Vehicles Beijing, Beijing 100081, Peoples R China
来源：
ACS APPLIED MATERIALS & INTERFACES | 2016年 / 8卷 / 33期
关键词：
ionic liquid; electrolyte; NaBF4; quantum chemical theoretical calculation; sodium-ion battery; ENERGY-STORAGE; PERFORMANCE; CHALLENGES; CATHODE;
D O I：
10.1021/acsami.6b07054
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Novel ionic liquid (IL) electrolytes are prepared by mixing 1-ethyl-3-methylimidazolium-bis-tetrafluoroborate (EMIBF4) with different concentrations of sodium salt (NaBF4). The as-prepared IL electrolytes display wide electrochemical windows of similar to 4 V (1-5 V), which are consistent with the quantum chemical theoretical calculation. The IL electrolyte with 0.1 M NaBF4 shows excellent ionic conductivity, namely, 9.833 x 10(-3) S cm(-1) at 20 degrees C. In addition, nonflammability and good thermal stability are exhibited by combustion test and thermogravimetric analysis (TGA), which indicate the high safety of the IL electrolyte.
引用
收藏
页码：21381 / 21386
页数：6
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