Physicochemical and electrochemical properties of N-methyl-N-methoxymethylpyrrolidinium bis(fluorosulfonyl)amide and its lithium salt composites
Physicochemical and electrochemical properties of N-methyl-N-methoxymethylpyrrolidinium bis(fluorosulfonyl)amide and its lithium salt composites
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DOI：
10.1016/j.jpowsour.2016.06.087
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发表时间：
2016-09
影响因子：
9.2
通讯作者：
S. Horiuchi;M. Yoshizawa‐Fujita;Y. Takeoka;M. Rikukawa
中科院分区：
文献类型：
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作者：
S. Horiuchi;M. Yoshizawa‐Fujita;Y. Takeoka;M. Rikukawa
合成了离子液体N-甲基-N-甲氧基甲基吡咯烷双（氟磺酰基）酰胺（[Pyr 1，1 O 1][FSA]），研究了其作为宽温度范围锂离子二次电池电解液的理化和电化学性能。[Pyr1通过向IL中加入双（三氟甲基磺酰基）氨基锂（LiTFSA）来制备[FSA]/Li盐（0.34 mol kg-1）复合材料。[Pyr1，1 O 1][FSA]和[Pyr 1，1 O 1][FSA]/LiTFSA的熔融温度（Tm）低于−30 °C。[Pyr1，1 O 1][FSA]的离子电导率比相应的只有烷基取代的IL的离子电导率高。[Pyr 1，1 O 1][FSA]和[Pyr 1，1 O 1][FSA]/LiTFSA的电化学窗口均为5.1 V。在25 °C下，在Ni电极上发生稳定的锂沉积和溶解。
The ionic liquid (IL)N-Methyl-N-methoxymethylpyrrolidinium bis(fluorosulfonyl)amide ([Pyr1,1O1][FSA]) was synthesized, and its physicochemical and electrochemical properties were investigated with respect to its application as an electrolyte in lithium-ion secondary batteries operating over a wide temperature range. [Pyr1,1O1][FSA]/Li salt (0.34 mol kg−1) composites were prepared by adding lithium bis(trifluoromethylsulfonyl)amide (LiTFSA) into the IL. [Pyr1,1O1][FSA] and [Pyr1,1O1][FSA]/LiTFSA exhibited melting temperatures (Tm) below −30 °C. [Pyr1,1O1][FSA] exhibited a higher ionic conductivity value as compared with that of the corresponding IL with only alkyl substituents. The electrochemical window for both [Pyr1,1O1][FSA] and [Pyr1,1O1][FSA]/LiTFSA was 5.1 V. Stable lithium deposition and dissolution occurred on a Ni electrode at 25 °C.