The electrochemical characteristics of the mixture of 1-ethyl-3-methylimidazolium tetrafluoroborate and 1-ethyl-3-methylimidazolium iodide

Siimenson, Carolin; Siinor, Liis; Lust, Karmen; Lust, Enn

doi:10.1016/j.jelechem.2014.07.035

Cited by 11 publications

(31 citation statements)

References 44 publications

(88 reference statements)

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“…[11][12][13][14]26,36 Exploring new RTILs and their mixtures containing halide ions, we have tested the stability and kinetics of the Ag|AgHal reference electrodes. In the case of AgCl reference…”

Section: -35mentioning

confidence: 99%

“…18,19 For Au(hkl) electrodes in I − and Br − containing room temperature ionic liquids (RTIL) mixtures, the adsorption step charge transfer resistance was non-zero. 11,20,21 All mentioned properties established for EMImBr promise a good practical outcome for electrochemical devices.…”

mentioning

confidence: 98%

“…11,20,21 All mentioned properties established for EMImBr promise a good practical outcome for electrochemical devices. * Electrochemical Society Member.…”

mentioning

confidence: 99%

“…complex models for the electrical double layer capacitance, that analyze the influence of the surface-active anion addition on the inner layer structure, dielectric permittivity, effective dipoles moment for dipole created at metal|RTIL interface, etc. 7,[11][12][13][14] To continue with the systematic research of halide ions, 1-ethyl-3-methylimidazolium bromide (EMImBr) was selected for the source of bromide ions. There are some theoretical and experimental studies of the thermal stability and decomposition mechanism of EMImBr.…”

mentioning

confidence: 99%

“…22 Also, bromide salts with different cations such as dihydroxybenzene, 1-methyl-3-octadecylimidazolium, and 1-butyl-3-methyl-imidazolium have been tested for the supercapacitor application. [22][23][24] According to the detailed comparison of the adsorption data for halide ions measured in aqueous, organic and ionic liquids solutions, [10][11][12][13][14]25,26 it is clear that the mechanism of the specific adsorption of Br − from ionic liquid media needs to be further investigated at metal single crystal electrodes, as well as at carbon electrodes for the futher application of surface active RTIL mixtures in electrochemical muscles and nano-switches, electrodynamic actuators, energy storage and conversion systems, such as EDLCs, organic solar cells and secondary batteries.…”

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confidence: 99%

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Electrochemical Investigation of 1-Ethyl-3-methylimidazolium Bromide and Tetrafluoroborate Mixture at Bi(111) Electrode Interface

Siimenson

Lembinen

Oll

et al. 2016

J. Electrochem. Soc.

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Electrochemical characterization of the interface between Bi(111) surface and ionic liquid mixtures of 1-ethyl-3-methylimidazolium tetrafluoroborate with 1-ethyl-3-methylimidazolium bromide (EMImBF 4 + x% EMImBr) has been evaluated by using the electrochemical impedance spectroscopy, cyclic voltammetry methods and density functional theory calculations. Dependence of the experimental data on the bromide concentration and on the electrode potential has been analyzed. Comparison of adsorption data with Bi(111) | EMImBF 4 + x% EMImI interface shows that adsorption activity of halide ions from EMImBF 4 follows a similar trend as from the aqueous and organic electrolyte solutions. The adsorption activity of anions increases in order Cl − < Br − < I − , despite the fact that the solvation properties of relevant media are significantly different. We discuss this trend in the light of a possible application of the RTIL mixtures as an electrolyte for electrochemical energy storage devices like supercapacitors. The ionic liquids as electrolytes have been studied since the early 20 th century, but there is still much to be understood regarding some fundamental aspects. [1][2][3][4][5][6] Theoretical models that explain the dependence of the differential capacitance values on the electrode potentials have been worked out for the aqueous and non-aqueous electrolytes and molten salts. 7,8 However, in the case of the specific adsorption, there are no detailed models for the electrical double layer capacitance, that analyze the influence of the surface-active anion concentration and electrode potential on the specific interaction energy (including charge transfer) and on the distance of the closest approach of anions onto the metal electrode surface.5,9,10 Therefore, the detailed analysis and characterization of these complex electrode | ionic liquid interfaces (with the addition of ions that might have strong chemical interactions and high interaction energies with electrode surface layer atoms, demonstrating very negative Gibbs adsorption energy values, so-called strong specific adsorption properties) is considered our high priority. Bismuth, as an electrode material, has been studied widely and has shown good electrochemical stability and high reproducibility of the data. The properties are inevitable for detailed investigation of interfacial adsorption and faradaic charge transfer processes. The amount of previously measured adsorption data from different electrolytes (including electrochemical impedance spectroscopy and in situ STM methods) enables to develop more realistic, i.e. complex models for the electrical double layer capacitance, that analyze the influence of the surface-active anion addition on the inner layer structure, dielectric permittivity, effective dipoles moment for dipole created at metal|RTIL interface, etc. 7,[11][12][13][14] To continue with the systematic research of halide ions, 1-ethyl-3-methylimidazolium bromide (EMImBr) was selected for the source of bromide ions. There are some theoretical and e...

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Section: -35mentioning

confidence: 99%

mentioning

confidence: 98%

“…11,20,21 All mentioned properties established for EMImBr promise a good practical outcome for electrochemical devices. * Electrochemical Society Member.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Electrochemical Investigation of 1-Ethyl-3-methylimidazolium Bromide and Tetrafluoroborate Mixture at Bi(111) Electrode Interface

Siimenson

Lembinen

Oll

et al. 2016

J. Electrochem. Soc.

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Electrochemical Capacitors with Confined Redox Electrolytes and Porous Electrodes

Yang

Zhang

et al. 2022

Advanced Materials

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Electrochemical capacitors (ECs), including electrical‐double‐layer capacitors and pseudocapacitors, feature high power densities but low energy densities. To improve the energy densities of ECs, redox electrolyte‐enhanced ECs (R‐ECs) or supercapbatteries are designed through employing confined soluble redox electrolytes and porous electrodes. In R‐ECs the energy storage is based on diffusion‐controlled faradaic processes of confined redox electrolytes at the surface of a porous electrode, which thus take the merits of high power densities of ECs and high energy densities of batteries. In the past few years, there has been great progress in the development of this energy storage technology, particularly in the design and synthesis of novel redox electrolytes and porous electrodes, as well as the configurations of new devices. Herein, a full‐screen picture of the fundamentals and the state‐of‐art progress of R‐ECs are given together with a discussion and outlines about the challenges and future perspectives of R‐ECs. The strategies to improve the performance of R‐ECs are highlighted from the aspects of their capacitances and capacitance retention, power densities, and energy densities. The insight into the philosophies behind these strategies will be favorable to promote the R‐EC technology toward practical applications of supercapacitors in different fields.

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The review of advances in interfacial electrochemistry in Estonia: electrochemical double layer and adsorption studies for the development of electrochemical devices

Pikma

Ers

Siinor

et al. 2022

J Solid State Electrochem

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The electrochemistry nowadays has many faces and challenges. Although the focus has shifted from fundamental electrochemistry to applied electrochemistry, one needs to acknowledge that it is impossible to develop and design novel green energy transition devices without a comprehensive understanding of the electrochemical processes at the electrode and electrolyte interface that define the performance mechanisms. The review gives an overview of the systematic research in the field of electrochemistry in Estonia which reflects on the excellent collaboration between fundamental and applied electrochemistry.

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The electrochemical characteristics of the mixture of 1-ethyl-3-methylimidazolium tetrafluoroborate and 1-ethyl-3-methylimidazolium iodide

Cited by 11 publications

References 44 publications

Electrochemical Investigation of 1-Ethyl-3-methylimidazolium Bromide and Tetrafluoroborate Mixture at Bi(111) Electrode Interface

Electrochemical Investigation of 1-Ethyl-3-methylimidazolium Bromide and Tetrafluoroborate Mixture at Bi(111) Electrode Interface

Electrochemical Capacitors with Confined Redox Electrolytes and Porous Electrodes

The review of advances in interfacial electrochemistry in Estonia: electrochemical double layer and adsorption studies for the development of electrochemical devices

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