Synthesis of Hydrophobic Ionic Liquids for Electrochemical Applications

Appetecchi, Giovanni Battista; Scaccia, Silvera; Tizzani, Cosimo; Alessandrini, F.; Passerini, Stefano

doi:10.1149/1.2213420

Cited by 214 publications

(147 citation statements)

References 20 publications

(30 reference statements)

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“…The Fc/Fc + (Snook et al, 2006) standard redox potential is taken as E°(Fc/Fc + ) = 0.45V vs. SHE whatever the solvent used. From Figure 13, the standard potential of Fc/Fc + system is 330 mV vs. the Ag/AgCl (P 14 -TFSI) , KCl (P 14 -TFSI), reference electrode, leading to a potential of 120 mV vs. SHE or 3.14 V vs. Li/Li + which agrees well with 3.1 V elsewhere determined (Appetecchi et al, 2006). Fig.…”

Section: Electrochemical Windows Of the P Xy -Tfsi Rtilssupporting

confidence: 76%

Undeniable Contribution of Aprotic Room Temperature Ionic Liquids in the Security of Li-Ion Batteries

Claude-Montigny¹,

Simona²,

Violleau³

2011

Applications of Ionic Liquids in Science and Technology

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Section: Electrochemical Windows Of the P Xy -Tfsi Rtilssupporting

confidence: 76%

Undeniable Contribution of Aprotic Room Temperature Ionic Liquids in the Security of Li-Ion Batteries

Claude-Montigny¹,

Simona²,

Violleau³

2011

Applications of Ionic Liquids in Science and Technology

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“…As expected from the sizes FAP − > TFSI − > PF 6 − , there is a clear trend that the capacitance in the anodic regime decreases in the order PF 6 − > TFSI − > FAP − . For the imidazolium-based ILs, the differential capacitance in the cathodic range decreases in the order [ [53,54]. The FAP − ILs were dried for several hours under vacuum (10 −3 mbar) at 100 • C by the Endres group in Clausthal and sent to Marburg in sealed sample containers.…”

Section: Discussionmentioning

confidence: 99%

The Differential Capacitance of Ionic Liquid / Metal Electrode Interfaces – A Critical Comparison of Experimental Results with Theoretical Predictions

Wallauer

Drüschler

Huber

et al. 2013

Zeitschrift Für Naturforschung B

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Results of potential-dependent differential capacitance measurements on the interface between six different ionic liquids and the (111) surface of single-crystalline gold are presented. The measurements were done by means of broadband impedance spectroscopy in a frequency range from 10 mHz to 1 MHz. We discuss the influence of the IL cation, the IL anion and the cations' alkyl chain length on the interfacial capacitance. Our results suggest that (i) there is no simple relationship between the cation size and the value of the differential capacitance, (ii) the general shape of the potentialdependent differential capacitance curve is more strongly influenced by the IL anion, and (iii) experimental differential capacitance curves do not exhibit a simple "camel-" or "bell-shaped" curvature as predicted by mean-field theories. Furthermore, the broadband measurements show that two capacitive processes can be distinguished, which take place on millisecond and second time scales, respectively. While a millisecond time scale is expected for double-layer charging governed by the bulk conductivity of the IL, the existence of a slow process points to additional barriers for charge transport at the interface. The capacitance contribution of the slow process is most pronounced for ILs based on the N-butyl-N-methyl-pyrrolidinium ([Pyr 1,4 ]) cation. A comparison of capacitance data with insitu STM data from previous studies suggests that the slow process is connected to herringbone-type structures at the interface. While the herringbone superstructure of the Au(111) surface is well known in aqueous electrochemistry, a herringbone-type structure of adsorbed ions was described in a recent MD simulation paper by Federov and coworkers (K. Kirchner, T. Kirchner, V. Ivaništšev, M. V. Fedorov, Electrochim. Acta 2013, in press:

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“…PYR13FSI and PYR13TFSI were synthesized according to the procedure published by Appetecchi et al [50]. The electrolyte SelectiLyte LP30 (50/50 wt.…”

Section: Methodsmentioning

confidence: 99%

Capillary Electrophoresis as Analysis Technique for Battery Electrolytes: (i) Monitoring Stability of Anions in Ionic Liquids and (ii) Determination of Organophosphate-Based Decomposition Products in LiPF6-Based Lithium Ion Battery Electrolytes

Pyschik¹,

Winter²,

Nowak³

2017

Separations

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Abstract:In this work, a method for capillary electrophoresis (CE) hyphenated to a high-resolution mass spectrometer was presented for monitoring the stability of anions in ionic liquids (ILs) and in commonly used lithium ion battery (LIB) electrolytes. The investigated ILs were 1-methyl-1-propylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR 13 TFSI) and 1-methyl-1-propylpyrrolidinium bis(fluorosulfonyl)imide (PYR 13 FSI). The method development was conducted by adjusting the following parameters: buffer compositions, buffer concentrations, and the pH value. Also the temperature and the voltage applied on the capillary were optimized. The ILs were aged at room temperature and at 60 • C for 16 months each. At both temperatures, no anionic decomposition products of the FSI − and TFSI − anions were detected. Accordingly, the FSI − and TFSI − anions were thermally stable at these conditions. This method was also applied for the investigation of LIB electrolyte samples, which were aged at 60 • C for one month. The LP30 (50/50 wt. % dimethyl carbonate/ethylene carbonate and 1 M lithium hexafluorophosphate) electrolyte was mixed with the additive 1,3-propane sultone (PS) and with one of the following organophosphates (OP): dimethyl phosphate (DMP), diethyl phosphate (DEP), and triethyl phosphate (TEP), to investigate the influence of these compounds on the formation of OPs.

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Synthesis of Hydrophobic Ionic Liquids for Electrochemical Applications

Cited by 214 publications

References 20 publications

Undeniable Contribution of Aprotic Room Temperature Ionic Liquids in the Security of Li-Ion Batteries

Undeniable Contribution of Aprotic Room Temperature Ionic Liquids in the Security of Li-Ion Batteries

The Differential Capacitance of Ionic Liquid / Metal Electrode Interfaces – A Critical Comparison of Experimental Results with Theoretical Predictions

Capillary Electrophoresis as Analysis Technique for Battery Electrolytes: (i) Monitoring Stability of Anions in Ionic Liquids and (ii) Determination of Organophosphate-Based Decomposition Products in LiPF6-Based Lithium Ion Battery Electrolytes

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