A carbonate-free electrolyte for lithium-ion batteries based on lithium bis(fluorosulfonyl)imide and 2-methylglutaronitrile enabling graphite negative electrodes

被引：12
作者：
Hirata, Kazuhisa [1 ]
Morita, Yoshihiro [2 ]
Kawase, Takeo [3 ]
Sumida, Yasutaka [1 ]
机构：
[1] Nippon Shokubai Co Ltd, Innovat & Business Dev Div, Res Ctr, 5-8 Nishi Otabi Cho, Suita, Osaka 5640034, Japan
[2] Nippon Shokubai Co Ltd, Catalysts & Green Energy Mat Business Div, Res Dept, 5-8 Nishi Otabi Cho, Suita, Osaka 5640034, Japan
[3] Nippon Shokubai Co Ltd, Innovat & Business Dev Div, New Business Planning Dept, 5-8 Nishi Otabi Cho, Suita, Osaka 5640034, Japan
来源：
ELECTROCHIMICA ACTA | 2019年 / 303卷
关键词：
Battery; Electrolytes; Energy storage; Lithium bis(fluorosulfonyl)imide (LiFSI); Carbonate-free; ALUMINUM CORROSION; ETHYLENE CARBONATE; SUPERCONCENTRATED ELECTROLYTES; LIQUID ELECTROLYTES; STABILITY; DINITRILE;
D O I：
10.1016/j.electacta.2019.02.032
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
We report here a carbonate-free electrolyte for lithium-ion batteries with low flammability which consist of lithium bis(fluorosulfonyl)imide (LiFSI) and 2-methylglutaronitrile (MGN) (LiFSI/MGN). LiFSI/MGN enables reversible lithium ion intercalation into graphite without any additives or co-solvents due to LiFSI and MGN-derived SEI formed on the surface of graphite negative electrode. LiCoO2/graphite full-cells with LiFSI/MGN show good cycle stability even at 1C despite its low ionic conductivity and high viscosity while those with LiFSI/succinonitrile (SN) and lithium bis(trifluorosulfonyl)imide (LiTFSI)/SN exhibit capacity fade. Moreover, LiFSI/MGN shows stable liquid phase at low temperature owing to its branched structure. Thus, LiFSI/MGN opens the possibility of lithium-ion batteries with enhanced safety owing to the high thermal stability and low flammability of MGN. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码：49 / 55
页数：7
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