کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4766719 | 1424107 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Investigation of the N-butyl-N-methyl pyrrolidinium trifluoromethanesulfonyl-N-cyanoamide (PYR14TFSAM) ionic liquid as electrolyte for Li-ion battery
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
A new asymmetrical anion, trifluoromethanesulfonyl-N-cyanoamide (TFSAMâ), was paired with N-butyl-N-methyl pyrrolidinium (PYR14+) to prepare PYR14TFSAM. It has been investigated for Li-ion battery application and compared to its PYR14+ analogs paired with either the dicyanamide anion (DCAâ) or other anions (i.e. bis(trifluoromethanesulfonyl) imide (TFSIâ), bis(fluorosulfonly)imide (FSIâ), trifluoromethanesulfonyl-fluorosulfonyl imide (FTFSIâ)). The conductivity of PYR14TFSAM is not only higher than that of PYR14TFSI, but also higher than that of PYR14FTFSI with 3.8 mS cmâ1 at 20 °C and 12.6 mS cmâ1 at 60 °C. In addition, the ionic liquid does not crystallize and exhibits a viscosity similar to that of PYR14FSI (and even lower above 30 °C, which also results in a higher conductivity at high temperature). Compared to PYR14DCA, PYR14TFSAM has a higher anodic stability, more compatible with state-of-the-art cathodes such as NCM, even though the PYR14DCA electrolyte also allowed surprisingly good cycling results of NCM cathode considering its low anodic stability. PYR14TFSAM also allows Li+ (de-)/insertion into graphite, using vinylene carbonate as additive. When used in conventional Li-ion electrolyte solvents, it leads to moderate conductivity (as compared with LiFSI or LiTFSI), although much higher than LiDCA. Additionally, it is shown that, even in EC/DMC-based electrolyte, LiTFSAM does not induce Al corrosion at 4.2 V.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 250, 1 October 2017, Pages 25-34
Journal: Electrochimica Acta - Volume 250, 1 October 2017, Pages 25-34
نویسندگان
Jan-Philipp Hoffknecht, Mathias Drews, Xin He, Elie Paillard,