Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
5.2
3.4
Journals
Materials
Special Issues
The Wonderful World of Ionic Liquids and Deep Eutectic Solvents
materials-logo
Submit to Materials Review for Materials Propose a Special Issue

Journal Menu

► Journal Menu

Journal Browser

► Journal Browser
share announcement

The Wonderful World of Ionic Liquids and Deep Eutectic Solvents

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Soft Matter".

Deadline for manuscript submissions: closed (10 July 2023) | Viewed by 8722

Special Issue Editors

Dr. Annalisa Paolone

E-Mail Website
Guest Editor
Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Comlessi, UOS La Sapienza, Piazzale A. Moro 5, 00185 Roma, Italy
Interests: ionic liquids; deep eutectic solvents; fundamental properties; applications; theory; experiments
Special Issues, Collections and Topics in MDPI journals
Dr. Giovanni Battista Appetecchi

E-Mail Website
Guest Editor
ENEA (Italian National Agency for New Technologies, Energy and Sustainable Economic Development), Department for Sustainability (SSPT), Division for Sustainable Materials (PROMAS), Materials and Physicochemical Processes Laboratory (MATPRO), Casaccia Research Center, Via Anguillarese 301, 00123 Rome, Italy
Interests: research and development of electrolyte/electrode materials/components for electrochemical energy storage systems; ionic liquids; polymer and gel electrolytes; lithium batteries
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Alessandro Triolo

E-Mail Website
Guest Editor
CNR - Consiglio Nazionale delle Ricerche, Istituto Struttura della Materia, Area della Ricerca di Tor Vergata, Via del Fosso del Covaliere, 100, 1-00133 Rome, Italy
Interests: ionic liquids, x-ray scattering, neutron scattering
Dr. Olga Russina

E-Mail Website
Guest Editor
Department of Chemistry, Sapienza University of Rome, I-00185 Rome, Italy
Interests: physical chemistry; ionic liquids; soft matter; X-ray; neutron diffraction
Dr. Anna Martinelli

E-Mail
Guest Editor
Chemistry and Chemical Engineering, Applied Surface Chemistry Chalmers University of Technology, S-41296 Gothenburg, Sweden
Interests: NMR; mesoporous materials; liquids; dynamics; proton conductivity; high-temperature behavior; BIS(Trifluoromethanesulfonyl)imide anion; pyrrolidinium cation; local coordination; ionogels

Special Issue Information

Dear Colleagues,

In the last few years, ionic liquids have attracted large scientific and technological interest. From a fundamental point of view, they are composed only by ions, and many of them are liquid at room temperature and even below. Therefore, ionic liquids represent a state of matter that in the past could be investigated only at much higher temperatures. The subtle balance of contributions to the interaction forces between ions is still far from being understood and is a challenge for many scientists. Moreover, ionic liquids find applications in many different fields, such as electrochemistry, solution, lubrication, separation, and synthesis of new compounds. The large variety of properties of ionic liquids has even increased, and to some extent been tailored, by mixing them with other ionic liquids or molecular compounds. In some cases, one obtains eutectic compounds or even deep eutectic systems. This Special Issue aims to report investigations of the challenging and fascinating properties and applications of ionic liquids or their mixtures.

Prof. Dr. Annalisa Paolone
Dr. Giovanni Battista Appetecchi
Prof. Dr. Alessandro Triolo
Dr. Olga Russina
Dr. Anna Martinelli
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • ionic liquids
  • deep eutectic solvents
  • fundamental properties
  • applications
  • theory
  • experiments

Published Papers (5 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

11 pages, 3017 KiB  
Article
Effects of Difluoro(oxalato)borate-Based Ionic Liquid as Electrolyte Additive for Li-Ion Batteries
by Graziano Di Donato, Giovanna Maresca, Matteo Palluzzi, Akiko Tsurumaki and Maria Assunta Navarra
Materials 2023, 16(4), 1411; https://doi.org/10.3390/ma16041411 - 08 Feb 2023
Cited by 2 | Viewed by 1688
Abstract
In this work, the use of N-methyl-N-propylpiperidinium difluoro(oxalato)borate Pip13DFOB ionic liquid (IL), originally synthesized in our laboratory, as an additive for liquid electrolytes in lithium-ion batteries (LIBs), is proposed. The synthesized IL exhibits glass and melting transitions at [...] Read more.
In this work, the use of N-methyl-N-propylpiperidinium difluoro(oxalato)borate Pip13DFOB ionic liquid (IL), originally synthesized in our laboratory, as an additive for liquid electrolytes in lithium-ion batteries (LIBs), is proposed. The synthesized IL exhibits glass and melting transitions at −70.9 °C and 17.1 °C, respectively, and a thermal decomposition temperature over 230 °C. A mixture based on 1.0 M LiPF6 in 1:1 v/v ethylene carbonate (EC): dimethyl carbonate (DMC) electrolyte solution (so called LP30) and the IL was prepared and tested in lithium metal cells versus two different commercially available carbonaceous electrodes, i.e., graphite (KS6) and graphene (GnP), and versus a high voltage LiNi0.5Mn1.5O4 (LNMO) cathode. A noticeable improvement was observed for Li|LNMO cells with an IL-added electrolyte, which exhibited a high specific capacity above 120 mAh g−1 with a Coulombic efficiency above 93% throughout 200 cycles, while the efficiency fell below 80% after 80 cycles with the absence of IL. The results confirm that the IL is promising additive for the electrolyte, especially for a longer cycle life of high-voltage cells. Full article
(This article belongs to the Special Issue The Wonderful World of Ionic Liquids and Deep Eutectic Solvents)
►▼ Show Figures

Figure 1

23 pages, 9508 KiB  
Article
Hydrocarbon Lubricating Oils with Admixture of Ionic Liquid as Electrorheological Medium
by Tomasz Jan Kałdoński, Jarosław Juda, Piotr Wychowański and Tadeusz Kałdoński
Materials 2023, 16(1), 330; https://doi.org/10.3390/ma16010330 - 29 Dec 2022
Cited by 1 | Viewed by 1774
Abstract
The article describes the results of experimental studies of electrorheological (ER) properties of lubricating oils containing an admixture of an ionic liquid as the electrically active ingredient. The novelty of these studies consists of the use of selected ionic liquids as additives to [...] Read more.
The article describes the results of experimental studies of electrorheological (ER) properties of lubricating oils containing an admixture of an ionic liquid as the electrically active ingredient. The novelty of these studies consists of the use of selected ionic liquids as additives to hydrocarbon oils in order to obtain quasi-homogenous mixtures with electrorheological properties. So far, such studies have not been carried out. Basic research, which consisted in determining the rheological characteristics in the presence of an external direct electric field, was carried out on a specially designed and built stand, which used a modified Brookfield DV-III Ultra viscometer. The conducted research showed that the produced mixtures generated the ER effect in the presence of a direct electric field with an intensity of up to 0.2 kV·mm−1. The tested mixtures showed different electrorheological characteristics. The research was also carried out in the so-called dielectric spectroscopy using the Hewlett Packard HP4192A impedance analyzer. The mechanism of generating and decaying the ER effect was diagnosed by in situ microscopy using the Nikon Eclipse LV100D optical microscope. It was found that the course of the τ = f(γ˙) characteristic of a mixture of hydrocarbon oil with a small admixture of an ionic liquid is mainly influenced by the so-called dielectric properties of the electrically active component, or rather their change as a function of the applied BIAS (DC) voltage. At the same time, the obtained results of the research gave grounds to state that the electrorheological characteristics also depend on many physicochemical properties of the mixture components and on the differentiation of their values e.g., from the difference in viscosity of the insulating base oil and the added ionic liquid, and also from the difference in the value of the surface tension of the base oil and the added ionic liquid. In these studies, it was found that the surface tension of the CJ001 ionic liquid at 25 °C was 26.032 mN·m−1. The surface tension of CJ008 was 28.099 mN·m−1 and that of PAO-6 oil was almost the same, i.e., 27.523 mN·m−1. The first mixture (GP1 + CJ001) showed Bigham characteristics and the second (PAO6 + CJ008) Newtonian, in the second mixture, the viscosity difference of the components was two times lower than in the first one (GP1—12.61 mPa·s, CJ001—552.42 mPa·s and PAO6—47.35 mPa·s, CJ008—327.24 mPa·s). Full article
(This article belongs to the Special Issue The Wonderful World of Ionic Liquids and Deep Eutectic Solvents)
►▼ Show Figures

Figure 1

12 pages, 10160 KiB  
Article
Insights into the Effect of Lithium Doping on the Deep Eutectic Solvent Choline Chloride:Urea
by Giselle de Araujo Lima e Souza, Maria Enrica Di Pietro, Franca Castiglione, Valeria Vanoli and Andrea Mele
Materials 2022, 15(21), 7459; https://doi.org/10.3390/ma15217459 - 24 Oct 2022
Cited by 4 | Viewed by 1414
Abstract
Choline-based deep eutectic solvents (DESs) are potential candidates to replace flammable organic solvent electrolytes in lithium-ion batteries (LIBs). The effect of the addition of a lithium salt on the structure and dynamics of the material needs to be clarified before it enters the [...] Read more.
Choline-based deep eutectic solvents (DESs) are potential candidates to replace flammable organic solvent electrolytes in lithium-ion batteries (LIBs). The effect of the addition of a lithium salt on the structure and dynamics of the material needs to be clarified before it enters the battery. Here, the archetypical DES choline chloride:urea at 1:2 mole fraction has been added with lithium chloride at two different concentrations and the effect of the additional cation has been evaluated with respect to the non-doped system via multinuclear NMR techniques. 1H and 7Li spin-lattice relaxation times and diffusion coefficients have been measured between 298 K and 373 K and revealed a decrease in both rotational and translational mobility of the species after LiCl doping at a given temperature. Temperature dependent 35Cl linewidths reflect the viscosity increase upon LiCl addition, yet keep track of the lithium complexation. Quantitative indicators such as correlation times and activation energies give indirect insights into the intermolecular interactions of the mixtures, while lithium single-jump distance and transference number shed light into the lithium transport, being then of help in the design of future DES electrolytes. Full article
(This article belongs to the Special Issue The Wonderful World of Ionic Liquids and Deep Eutectic Solvents)
►▼ Show Figures

Figure 1

13 pages, 1952 KiB  
Article
Thermal Decomposition, Low Temperature Phase Transitions and Vapor Pressure of Less Common Ionic Liquids Based on the Bis(trifuoromethanesulfonyl)imide Anion
by Annalisa Paolone, Boumediene Haddad, Didier Villemin, Mostefa Boumediene, Bekhaled Fetouhi and Mohammed Amin Assenine
Materials 2022, 15(15), 5255; https://doi.org/10.3390/ma15155255 - 29 Jul 2022
Cited by 4 | Viewed by 1588
Abstract
Four ionic liquids (ILs) based on the bis(trifluoromethanesulfonyl)imide (NTf2) anion were synthesized and characterized concerning their thermal stability, the occurrence of low temperature phase transitions and their volatility. All these physical quantities are highly important for possible applications. Both monocationic and [...] Read more.
Four ionic liquids (ILs) based on the bis(trifluoromethanesulfonyl)imide (NTf2) anion were synthesized and characterized concerning their thermal stability, the occurrence of low temperature phase transitions and their volatility. All these physical quantities are highly important for possible applications. Both monocationic and dicationic ILs were considered. All ILs exhibit thermal stability exceeding 350 °C, an extremely high value, due to the presence of the NTf2 anion. Monocationic ILs can undergo crystallization, and they melt at 1 and 38 °C. On the contrary, dicationic ILs containing large positively charged ions display only a glass transition around −40 °C, without any crystallization or melting process; this fact is particularly important in view of the possibly low temperature applications of the dication ILs. The vapor pressure, pv, of the four ILs was measured by isothermal thermogravimetry in the temperature range between 250 and 325 °C; the lowest values of pv were obtained for the two dicationic liquids, suggesting that they are particularly well suited for high temperature applications. The vaporization enthalpy was calculated through the Clausius–Clapeyron equation and was found in the range between ~140 and ~180 kJ/mol depending on the specific IL. Full article
(This article belongs to the Special Issue The Wonderful World of Ionic Liquids and Deep Eutectic Solvents)
►▼ Show Figures

Figure 1

12 pages, 2741 KiB  
Article
Internal Dynamics of Ionic Liquids over a Broad Temperature Range—The Role of the Cation Structure
by Danuta Kruk, Mariusz Jancelewicz, Adam Klimaszyk, Roksana Markiewicz, Zbigniew Fojud and Stefan Jurga
Materials 2022, 15(1), 216; https://doi.org/10.3390/ma15010216 - 28 Dec 2021
Cited by 1 | Viewed by 1292
Abstract
1H and 19F spin-lattice relaxation experiments have been performed for a series of ionic liquids sharing the same anion: bis(trifluoromethanesulfonyl)imide but including cations of different alkyl chain lengths: butyltriethylammonium, triethyloctylammonium, dodecyltriethylammo-nium and hexadecyltriethylammonium. The studies have been carried out in the [...] Read more.
1H and 19F spin-lattice relaxation experiments have been performed for a series of ionic liquids sharing the same anion: bis(trifluoromethanesulfonyl)imide but including cations of different alkyl chain lengths: butyltriethylammonium, triethyloctylammonium, dodecyltriethylammo-nium and hexadecyltriethylammonium. The studies have been carried out in the temperature range from 383 to 108 K at the resonance frequency of 200 MHz (for 1H). A quantitative analysis of the relaxation data has revealed two dynamical processes for both kinds of ions. The dynamics have been successfully modeled in terms of the Arrhenius law. The timescales of the dynamical processes and their temperature evolution have been discussed in detail, depending on the structure of the cation. Full article
(This article belongs to the Special Issue The Wonderful World of Ionic Liquids and Deep Eutectic Solvents)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-5
Back to TopTop