Aqueous Co-Solvent in Zwitterionic-based Protic Ionic Liquids as Electrolytes in 2.0 V Supercapacitors.

Autor: Lu X; Instituto de Ciencia de Materiales de Madrid-ICMM, Consejo Superior de Investigaciones Científicas-CSIC, Campus de Cantoblanco, 28049, Madrid, Spain., Vicent-Luna JM; Department of Physical, Chemical, and Natural Systems, Universidad Pablo de Olavide, Ctra. Utrera km. 1, 41013, Seville, Spain.; Center for Computational Energy Research, Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600MB, Eindhoven, The Netherlands., Calero S; Department of Physical, Chemical, and Natural Systems, Universidad Pablo de Olavide, Ctra. Utrera km. 1, 41013, Seville, Spain.; Materials Simulation and Modelling, Department of Applied Physics, Eindhoven University of Technology, 5600MB, Eindhoven, The Netherlands., Roldán-Ruiz MJ; Instituto de Ciencia de Materiales de Madrid-ICMM, Consejo Superior de Investigaciones Científicas-CSIC, Campus de Cantoblanco, 28049, Madrid, Spain., Jiménez R; Instituto de Ciencia de Materiales de Madrid-ICMM, Consejo Superior de Investigaciones Científicas-CSIC, Campus de Cantoblanco, 28049, Madrid, Spain., Ferrer ML; Instituto de Ciencia de Materiales de Madrid-ICMM, Consejo Superior de Investigaciones Científicas-CSIC, Campus de Cantoblanco, 28049, Madrid, Spain., Gutiérrez MC; Instituto de Ciencia de Materiales de Madrid-ICMM, Consejo Superior de Investigaciones Científicas-CSIC, Campus de Cantoblanco, 28049, Madrid, Spain., Del Monte F; Instituto de Ciencia de Materiales de Madrid-ICMM, Consejo Superior de Investigaciones Científicas-CSIC, Campus de Cantoblanco, 28049, Madrid, Spain.
Jazyk: angličtina
Zdroj: ChemSusChem [ChemSusChem] 2020 Nov 20; Vol. 13 (22), pp. 5983-5995. Date of Electronic Publication: 2020 Oct 01.
DOI: 10.1002/cssc.202002028
Abstrakt: High-performance energy-storage devices are receiving great interest in sustainable terms as a required complement to renewable energy sources to level out the imbalances between supply and demand. Besides electrode optimization, a primary objective is also the judicious design of high-performance electrolytes combining novel ionic liquids (ILs) and mixtures of aqueous solvents capable of offering "à la carte" properties. Herein, it is described the stoichiometric addition of a zwitterion such as betaine (BET) to protic ILs (PILs) such as those formed between methane sulfonic acid (MSAH) or p-toluenesulfonic acid (PTSAH) with ethanolamine (EOA). This addition resulted in the formation of zwitterionic-based PILs (ZPILs) containing the original anion and cation as well as the zwitterion. The ZPILs prepared in this work ([EOAH] + [BET][MSA] - and [EOAH] + [BET][PTSA] - ) were liquid at room temperature even though the original PILs ([EOAH] + [MSA] - and [EOAH] + [PTSA] - ) were not. Moreover, ZPILs exhibited a wide electrochemical stability window, up to 3.7 V vs. Ag wire for [EOAH] + [BET][MSA] - and 4.0 V vs. Ag wire for [EOAH] + [BET][PTSA] - at room temperature, and a high miscibility with both water and aqueous co-solvent (WcS) mixtures. In particular, "WcS-in-ZPIL" mixtures of [EOAH] + [BET][MSA] - in 2 H 2 O/ACN/DMSO provided specific capacitances of approximately 83 F g -1 at current densities of 1 A g -1 , and capacity retentions of approximately 90 % after 6000 cycles when operating at a voltage of 2.0 V and a current density of 4 A g -1 .
(© 2020 Wiley-VCH GmbH.)
Databáze: MEDLINE
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