期刊
RSC ADVANCES
卷 4, 期 4, 页码 1996-2003出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ra46118a
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资金
- State of Baden-Wuerttemberg
- Singapore National Research Foundation under its Campus for Research Excellence and Technological Enterprise (CREATE) programme
We report on the synthesis and the properties of N,N,N',N'-tetramethyl-N '',N ''-pentamethyleneguanidinium bis(trifluoromethylsulfonyl)imide (PipGuan-TFSI). The cation of this novel ionic liquid combines guanidinium and piperidinium structural elements. We tested it for its viscosity, ion conductivity, and also for its thermal and electrochemical stability. Furthermore, a 0.5 M solution of lithium TFSI in PipGuan-TFSI was tested as an electrolyte for Li-ion batteries. These experiments included cycles of Li deposition/dissolution on stainless steel and (de) intercalation into/from LiFePO4 electrodes. The tests involving LiFePO4 cathodes were performed at various C-rates and temperatures for a better quantitative comparison to other electrolyte systems. We discuss in how far PipGuan-TFSI successfully combines the advantages of guanidinium and piperidinium ionic liquids for battery electrolyte applications.
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