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Novel choline-based ionic liquids as safe electrolytes for high-voltage lithium-ion batteries
- Source :
- Journal of Power Sources. 328:397-404
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- Three choline-based ionic liquids functionalized with trimethylsilyl, allyl, and cynoethyl groups are synthesized in an inexpensive route as safe electrolytes for high-voltage lithium-ion batteries. The thermal stabilities, viscosities, conductivities, and electrochemical windows of these ILs are reported. Hybrid electrolytes were formulated by doping with 0.6 M LiPF6/0.4 M lithium oxalydifluoroborate (LiODFB) as salts and dimethyl carbonate (DMC) as co-solvent. By using 0.6 M LiPF6/0.4 M LiODFB trimethylsilylated choline-based IL (SN1IL-TFSI)/DMC as electrolyte, LiCoO2/graphite full cell showed excellent cycling performance with a capacity of 152 mAh g-1 and 99% capacity retention over 90 cycles at a cut-off voltage of 4.4 V. The propagation rate of SN1IL-TFSI)/DMC electrolyte is only one quarter of the commercial electrolyte (1 M LiPF6 EC/DEC/DMC, v/v/v = 1/1/1), suggesting a better safety feature.
- Subjects :
- Trimethylsilyl
Renewable Energy, Sustainability and the Environment
Inorganic chemistry
Energy Engineering and Power Technology
chemistry.chemical_element
02 engineering and technology
Electrolyte
010402 general chemistry
021001 nanoscience & nanotechnology
Electrochemistry
01 natural sciences
Lithium-ion battery
0104 chemical sciences
chemistry.chemical_compound
chemistry
Ionic liquid
Lithium
Graphite
Electrical and Electronic Engineering
Physical and Theoretical Chemistry
Dimethyl carbonate
0210 nano-technology
Subjects
Details
- ISSN :
- 03787753
- Volume :
- 328
- Database :
- OpenAIRE
- Journal :
- Journal of Power Sources
- Accession number :
- edsair.doi...........111de1dbb0a717a8ba1c713bb9c5edb1