Electrochemical Reaction of Organic Compounds in Ionic Liquids

Torriero, Angel A. J.; MacFarlane, Douglas R.

doi:10.1007/978-3-319-15132-8_15

Cited by 11 publications

(13 citation statements)

References 53 publications

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“…The potential values of LSV were referenced to the redox potential of 2 mM ferrocene (Fc) in the corresponding IL, as recommended by IUPAC [16] . The Fc/Fc + redox couple has been used widely to characterize ILs [17] , [18] , [19] , [20] .…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Dataset of the electrochemical potential windows for the Au(hkl)|ionic liquid interfaces defined by the cut-off current densities

Ueda

2021

Data in Brief

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This data article describes the linear sweep voltammetry (LSV) profiles of five ionic liquids (ILs) at the low-index ( hkl ) ( hkl = 111, 100, and 110) planes of Au. The LSV profiles were recorded at 25 ± 1°C for the Au( hkl )|IL interfaces maintained in a hanging meniscus configuration in an inert Ar atmosphere (with H 2 O and O 2 concentrations being lower than 5 ppm). The width of the electrical double-layer regions ( E dl ) and the electrochemical potential windows ( E pw ) of the ILs were evaluated based on the cut-off current densities ( j cut-off ): ±5, ±10, and ±20 µA cm –2 for E dl and ±0.1, ±0.5, and ±1.0 mA cm –2 for E pw . The potential values were calibrated to the redox potential of ferrocene/ferrocenium in each IL. A detailed discussion on the electrochemical behaviors of the ILs on Au( hkl ) is provided in the related article “Voltammetric Investigation of Anodic and Cathodic Processes at Au( hkl )|Ionic Liquid Interfaces”, published in the Journal of Electroanalytical Chemistry (Ueda and Yoshimoto, 2021).

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Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Dataset of the electrochemical potential windows for the Au(hkl)|ionic liquid interfaces defined by the cut-off current densities

Ueda

2021

Data in Brief

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“…* Electrolyte: In the case of elemental lithium, the SEI is reported to form differently depending on the type of liquid electrolyte. [1,4,6] Consequently, the ohmic resistance differs. This is the reason why comparing reference potentials measured in different electrolytes, but via the same Li RE, could prove difficult under certain conditions.…”

Section: The Dilemma Of Error Sourcesmentioning

confidence: 99%

“…[1] The reasons for this are quickly identified, but complex in their origin: Elemental lithium is still the most used reference electrode (RE) in non-electrolytic, beaker-less, non-aqueous, sealed cells since it is easy to implement and requires no conversion (vs. Li/Li + ). [2][3][4][5] The issue with Li is that the measured potentials vitally depend on the electrolyte composition [6,7] and concentration [8] and its cleaning procedure, [9] limiting their comparability considerably. An equally constraining factor is the encountered variation of the design and size of REs, delivering different potentials even if the RE material is the same.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Method to Determine the Measurement Error of Reference Electrodes within Lithium‐Ion Batteries

et al. 2023

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Reference electrodes (REs) play a crucial role in the accurate assessment and control of battery potentials, but their confidence is overestimated. Researchers have tracked the source of the error to the RE design that blocks the lithium‐ion path between anode and cathode. These errors or potential deviations are mostly modeled or less‐frequently estimated after observing Li plating post‐mortem. This is the first study to showcase an experimental method that allows a more precise error quantification in‐operando of a RE. The key idea is to relate the error‐affected reference potential to an unaffected quantity, such as the cell dilatation. Although our experimental setups are special, this approach can also be applied to different setups and REs. Using the presented method, we provoked Li plating in NMC811/graphite pouch cells and determined the potential deviation of our perforated RE to be 12 mV under fast charging conditions. In contrast to previous studies, we found the error to be positive, offering a new explanation of the error mechanism of REs.

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“…39 Consequently, Fc/Fc + has been widely used as an internal standard to read the E 1/2 values of other redox reactions in a solution. 40,41 However, the obvious solvent effect on the E 1/2 value of Fc/Fc + has been observed. In organic solvents, the E 1/2 value of Fc/Fc + may be related to the Gutmann donor/accept numbers, the dipole moments, or the ε r values of corresponding solvent molecules.…”

Section: ■ Introductionmentioning

confidence: 99%

Possibility of Using Ferrocene as the Cyclic Voltammetry Probe to Investigate the Polarities of Ionic Liquids

et al. 2023

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Polarity has been considered as one of the important properties of an ionic liquid, which influences its design and industrial application. Though many empirical polarity scales of molecular solvents have been used to predict the polarities of ionic liquids, they always have their certain limitations. In the present work, ferrocene was selected as the cyclic voltammetry probe to investigate the polarities of ionic liquids. The experimental results suggested that the half-wave potential values of ferrocene/ferrocenium measured by cyclic voltammetry had a linear relationship with the E T(30) values of aprotic ionic liquids. Meanwhile, some polarity rules obtained here were in line with those summarized by other research studies. In addition, it was concluded that the polarity of a protic ionic liquid was slightly weaker than that of its corresponding Brønsted base. This work could provide a new and simple method to research the polarities of ionic liquids.

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Electrochemical Reaction of Organic Compounds in Ionic Liquids

Cited by 11 publications

References 53 publications

Dataset of the electrochemical potential windows for the Au(hkl)|ionic liquid interfaces defined by the cut-off current densities

Dataset of the electrochemical potential windows for the Au(hkl)|ionic liquid interfaces defined by the cut-off current densities

An Experimental Method to Determine the Measurement Error of Reference Electrodes within Lithium‐Ion Batteries

Possibility of Using Ferrocene as the Cyclic Voltammetry Probe to Investigate the Polarities of Ionic Liquids

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