Listar Mesturas por autor "Varela, Luis M."

Mostrando ítems 1-19 de 19

    • Comparison of the ionic conductivity of pure imidazolium nitrate and that doped with a lithium nitrate salt in liquid and gel forms as potential electrolytes 

      Vallet, Pablo; Parajó, Juan José; Sotuela, Félix; Villanueva López, María; Cabeza, Óscar; Varela, Luis M.; Salgado, Josefa (MDPI, 2019-11-14)
      [Abstract] Current electrolytes for electrochemical energy storage devices are made of solvents, which often present problems of flammability, corrosion and high toxicity. Ionic liquids and mixtures with metal salts are ...

    • Determination of Thermophysical Properties of the Protic Ionic Liquid EIM NO₃, Pure and Doped with Lithium Nitrate Salt 

      Vallet, Pablo; Parajó, Juan José; Cabeza, Óscar; Varela, Luis M.; Salgado, Josefa; Villanueva López, María (MDPI, 2020-11-14)
      [Abstract] In this work, viscosity, density and electrical conductivity of the ionic liquid, Ethylimidazolium Nitrate pure and doped with lithium nitrate salt were determined in order to check the properties’ improvement ...

    • Effect of Gold Nanoparticles on Transport Properties of the Protic Ionic Liquid Propylammonium Nitrate 

      García-Garabal, Sandra; Domínguez-Pérez, Montserrat; Cabeza, Óscar; Arosa, Yago; Varela, Luis M.; Fernández-López, Cristina; Pérez-Juste, Jorge; Pastoriza-Santos, Isabel (American Chemical Society, 2021-07-21)
      [Abstract] Here, we analyze the effect of gold-nanoparticle (AuNPs)-doping of the protic ionic liquid (IL) propyl ammonium nitrate (PAN) on some physical properties, such as density, viscosity, and ionic conductivity, in ...

    • Electrical Conductivity and Nyquist Plot of C₄C₁Im BF₄ at Room Temperature by Impedance Spectroscopy 

      Vallet, Pablo; Parajó, Juan José; Sotuela, Félix; Morcillo, Ángel; Villanueva López, María; Cabeza, Óscar; Varela, Luis M.; Salgado, Josefa (MDPI, 2020-11-14)
      [Abstract] Ionic liquids (ILs) represent a real alternative for electrochemical applications due to their remarkable characteristics, namely a very low vapour pressure, low flammability, high thermal stability, wide potential ...

    • Experimental Device to Measure the Ionic Conductivity Anisotropy in Liquid Crystal Hydrogel Based In [EMIM] Alkyl Sulfate Ionic Liquids 

      Portela, D.; Segade, Luisa; Arosa, Yago; López Lago, Elena; Varela, Luis M.; Tojo, Emilia; Cabeza, Óscar (Elsevier, 2021-12-10)
      [Abstract] We have built an experimental device with the aim to measure the expected electrical conductivity anisotropy in a liquid crystal, obtained from the gelation of the ionic liquid 1-ethyl-3-methyl imidazolium decyl ...

    • Imidazolium Decyl Sulfate: A Very Promising Selfmade Ionic Hydrogel 

      Cabeza, Óscar; Rilo, Esther; Segade, Luisa; Domínguez-Pérez, Montserrat; García-Garabal, Sandra; Ausín, David; López Lago, Elena; Varela, Luis M.; Vilas, Miguel; Verdía, Pedro; Tojo, Emilia (Royal Society of Chemistry (Gran Bretaña), 2017-12-24)
      [Abstract] In this paper, we show, for the first time, the synthesis, structural characterization, phase diagram and physical properties of the ionic liquid, 1-ethyl-3-methyl imidazolium decyl sulfate [EMIm][DSO4]. At 25 ...

    • Influence of Metal Salts Addition on Physical and Electrochemical Properties of Ethyl and Propylammonium Nitrate 

      Ausín, David; Trenzado Diepa, José Luis; Turmine, Mireille; Varela, Luis M.; Cabeza, Óscar; González-Romero, Elisa; Segade, Luisa (MDPI, 2022-12-16)
      [Abstract] In this work, we deepen in the characterization of two protic ionic liquids (PILs), ethylammonium nitrate (EAN) and propylammonium nitrate (PAN). With this aim, we determined the influence of inorganic nitrate ...

    • Influence of Small Quantities of Water on the Physical Properties of Alkylammonium Nitrate Ionic Liquids 

      Ausín, David; Parajó, Juan José; Trenzado, José L.; Varela, Luis M.; Cabeza, Óscar; Segade, Luisa (MDPI, 2021-07-08)
      [Abstract] This paper presents a comprehensive study of two alkylammonium nitrate ionic liquids. As part of this family of materials, mainly ethylammonium nitrate (EAN) and also propylammonium nitrate (PAN) have attracted ...

    • Ionic liquid/metal salt mixtures at the graphene interface: A density functional theory approach 

      Rodríguez-Fernández, Carlos Damián; Rivera-Pousa, Alejandro; Otero-Mato, José M.; Zhour, Kazem; Montes-Campos, Hadrián; Méndez-Morales, Trinidad; Varela, Luis M. (Elsevier, 2023)
      [Abstract] The interaction of graphene sheets with metal cations is very relevant because of the modifications that are induced in the electrochemical properties of the 2D material. Ionic liquids are a promising kind of ...

    • Mesostructure and Physical Properties of Aqueous Mixtures of the Ionic Liquid 1-Ethyl-3-Methyl Imidazolium Octyl Sulfate Doped With Divalent Sulfate Salts in the Liquid and the Mesomorphic States 

      Cabeza, Óscar; Segade, Luisa; Domínguez-Pérez, Montserrat; Rilo, Esther; Ausín, David; Martinelli, Anna; Yaghini, Negin; Gollas, Bernhard; Kriechbaum, Manfred; Russina, Olga; Triolo, Alessandro; López Lago, Elena; Varela, Luis M. (Royal Society of Chemistry (Gran Bretaña), 2018-03-03)
      [Abstract] This paper extends the study of the induced temperature change in the mesostructure and in the physical properties occurring in aqueous mixtures of the ionic liquid 1-ethyl-3-methyl imidazolium octyl-sulfate ...

    • Mixtures of Ethylammonium Nitrate and Ethylene Carbonate: Bulk and Interfacial Analysis 

      Lois-Cuns, Raúl; Otero-Lema, Martín; Rivera-Pousa, Alejandro; Vallet Moreno, Pablo; Parajó, Juan José; Cabeza, Óscar; Montes-Campos, Hadrián; Méndez-Morales, Trinidad; Varela, Luis M. (Elsevier, 2023-06-22)
      [Abstract] The structure and dynamics of binary mixtures of a protic ionic liquid (ethylammonium nitrate) and ethylene carbonate are studied by means of atomistic molecular dynamics simulations and experimental measurements ...

    • On the Physical Properties of Mixtures of Nitrate Salts and Protic Ionic Liquids 

      Vallet, Pablo; Bouzón-Capelo, Silvia; Méndez-Morales, Trinidad; Gómez-González, Víctor; Arosa, Yago; de la Fuente, Raúl; López Lago, Elena; Rodríguez, Julio R.; Gallego, Luis J.; Parajó, Juan José; Salgado, Josefa; Turmine, Mireille; Segade, Luisa; Cabeza, Óscar; Varela, Luis M. (Elsevier, 2022-01-19)
      [Abstract] We report a systematic study of the effect of salt concentration and its cation valence on several equilibrium and transport properties of mixtures of the model protic ionic liquid ethylammonium nitrate with ...

    • Preliminary Study of New Electrolytes Based on [MPPyr][TFSI] for Lithium Ion Batteries 

      García-Garabal, Sandra; Domínguez-Pérez, Montserrat; Portela, Dafne; Varela, Luis M.; Cabeza, Óscar (Elsevier, 2022-07-12)
      [Abstract] The application of ionic liquids in lithium ion batteries has increased in recent years in order to find new electrolytes that improve both performance and safety. The gathering of experimental data in order to ...

    • Strange Behaviour of Transport Properties in Novel Metal Thiocyanate Based Ionic Liquids 

      Cabeza, Óscar; Segade, Luisa; Domínguez-Pérez, Montserrat; Rilo, Esther; Ausín, David; Seijas, Julio A.; Vázquez-Tato, M. Pilar; Matveev, Vladimir V.; Ievlev, Alexandr V.; Salgado, Josefa; Varela, Luis M. (Elsevier, 2021-08-03)
      [Abstract] In a previous paper some of us presented the structure and some properties of a new family of ionic liquids, ILs, with a common cation, 1-butyl-3-methyl imidazolium (the popular [C4C1Im]⁺ or [BMIM]⁺) and a variety ...

    • Structural Characterization by NMR Procedure of C₄C₁Pyrr TFSI Doped with Lithium TFSI Salt in Liquid and Gel States 

      Vallet, Pablo; Parajó, Juan José; Fernández-Míguez, Lois; Sotuela, Félix; Morcillo, Ángel; Villanueva López, María; Cabeza, Óscar; Matveev, Vladimir V.; Ievlev, Alexandr V.; Tutukin, Konstantin; Varela, Luis M.; Salgado, Josefa (MDPI, 2020-11-14)
      [Abstract] Ionic liquids represent a viable option as electrolytes for electrochemical applications such as energy storage devices, due to their high ionic conductivity and wide electrochemical window. However, liquid ...

    • Structure, Dynamics and Conductivities of Ionic Liquid-Alcohol Mixtures 

      Otero-Mato, José M.; Montes Campos, Hadrián; Gómez-González, Víctor; Montoto, Martín; Cabeza, Óscar; Kondrat, Svyatoslav; Varela, Luis M. (Elsevier, 2022-03-19)
      [Abstract] We study the microscopic structure and transport properties of ions in mixtures of 1-butyl-3-methylimidazolium and 1-butyl-3-ethylimidazolium iodide with ethanol using atomistic molecular dynamics simulations ...

    • Structure, Dynamics and Ionic Conductivities of Ternary Ionic Liquid/Lithium Salt/DMSO Mixtures 

      Martínez-Crespo, Pablo; Otero-Lema, Martín; Cabeza, Óscar; Montes Campos, Hadrián; Varela, Luis M. (Elsevier, 2022-04-28)
      [Abstract] In this paper we report classical Molecular Dynamics and ab initio Density Functional Theory simulations of the structure and single particle dynamics of ternary mixtures of a protic (ethylammonium nitrate, EAN) ...

    • Synthesis, Microstructure and Volumetry of Novel Metal Thiocyanate Ionic Liquids With [BMIM] Cation 

      Cabeza, Óscar; Varela, Luis M.; Rilo, Esther; Segade, Luisa; Domínguez-Pérez, Montserrat; Ausín, David; Pedro, Manuel de; Rodríguez Fernández, Jesús; González, Jesús Antonio; Vázquez-Tato, M. Pilar; Arosa, Yago; López Lago, Elena; Fuente, Raúl de la; Parajó, Juan José; Salgado, Josefa; Villanueva López, María; Matveev, Vladimir; Ievlev, A.V.; Seijas, Julio A. (Elsevier, 2019-03-17)
      [Abstract] We present a new family of ionic liquids (ILs) with a common cation, 1-butyl-3-methyl imidazolium, the popular [BMIM]+ (also written C4C1Im+) and a variety of anionic complexes (also called adducts) based in ...

    • Thermophysical Characterization of TFSI Based Ionic Liquid and Lithium Salt Mixtures 

      Fernández-Míguez, Lois; Vallet, Pablo; Tasende-Rodríguez, Lucía Camila; Doval, Alejandro; Villanueva López, María; Cabeza, Óscar; Varela, Luis M.; Salgado, Josefa; Parajó, Juan José (MDPI, 2019-11-14)
      [Abstract] The ionic liquids (ILs) doped with metal salts have become a real alternative as electrolytes for batteries, but the right choice of these compounds for reaching the adequate properties and performance is still ...