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

页码：21381 / 21386

页数：6

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