Highly Safe Ionic Liquid Electrolytes for Sodium-Ion Battery: Wide Electrochemical Window and Good Thermal Stability.
Highly Safe Ionic Liquid Electrolytes for Sodium-Ion Battery: Wide Electrochemical Window and Good Thermal Stability.
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DOI：
10.1021/acsami.6b07054
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发表时间：
2016-08
影响因子：
9.5
通讯作者：
Feng Wu;Na Zhu;Ying Bai;Libin Liu;Hang Zhou;Chuan Wu
中科院分区：
文献类型：
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作者：
Feng Wu;Na Zhu;Ying Bai;Libin Liu;Hang Zhou;Chuan Wu
通过将1-乙基-3-甲基咪唑双四氟硼酸盐（EMIBF 4）与不同浓度的钠盐（NaBF 4）混合制备新型离子液体（IL）电解质。所制备的离子液体电解质显示出宽的电化学窗口，其值为1.4V（1-5 V），这与量子化学理论计算结果一致。含0.1 M NaBF 4的离子液体电解质显示出优异的离子电导率，在20 °C时为9.833 × 10（-3）S cm（-1）。此外，燃烧试验和热重分析（TGA）表明，不燃性和良好的热稳定性，表明IL电解质的高安全性。
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 ∼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 × 10(-3) S cm(-1) at 20 °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.