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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Physicochemical Properties of Three Ionic Liquids Containing a Tetracyanoborate Anion and Their Lithium Salt Mixtures

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Author(s):
Sanchez-Ramirez, Nedher [1] ; Martins, Vitor L. [1] ; Ando, Romulo A. [1] ; Camilo, Fernanda F. [2] ; Urahata, Sergio M. [3] ; Ribeiro, Mauro C. C. [1] ; Torresi, Roberto M. [1]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo, Inst Quim, BR-05513970 Sao Paulo - Brazil
[2] Univ Fed Sao Paulo, Inst Ciencias Ambientais Quim & Farmaceut, BR-09913030 Diadema, SP - Brazil
[3] Univ Sao Paulo, Inst Fis, BR-05513970 Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Physical Chemistry B; v. 118, n. 29, p. 8772-8781, JUL 24 2014.
Web of Science Citations: 18
Abstract

Given their relevant physicochemical properties, ionic liquids (ILs) are attracting great attention as electrolytes for use in different electrochemical devices, such as capacitors, sensors, and lithium ion batteries. In addition to the advantages of using ILs containing lithium cations as electrolytes in lithium ion batteries, the Li+ transport in ILs containing the most common anion, bis(trilluoromethanesulfonyl) imide anion ({[}Tf2N]), is reportedly small; therefore, its contribution to the overall conductivity is also low. In this work, we describe the preparation and characterization of two new and one known IL containing the tetracyanoborate anion ({[}B(CN)(4)]) as the anionic species. These ILs have high thermal and chemical stabilities, with almost twice the ionic conductivity of the {[}Tf2N] ILs and, most importantly, provide a greater role for the Li+ ion throughout the conductivity process. The experimental ionic conductivity and self-diffusion coefficient data show that the {[}B(CN)(4)]-based Its and their Li+ mixtures have a higher number of charge carriers. Molecular dynamics simulations showed a weaker interaction between Li+ and {[}B(CN)(4)] than that with {[}Tf2N]. These results may stimulate new applications for ILs that have good Li+ transport properties. (AU)

FAPESP's process: 09/53199-3 - Molecular recognition and energy storage: fundamental studies concerning geometry, size and synthesis effects on the optimization of the chemical properties of electroactive materials
Grantee:Roberto Manuel Torresi
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 13/22748-7 - Development of High Performance Electrochemical Capacitors Based on Graphene and Ionic Liquids.
Grantee:Vitor Leite Martins
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 10/08646-9 - Synthesis and characterization of ionic liquids based in phosphonium quaternary cations
Grantee:Nédher Sánches Ramírez
Support Opportunities: Scholarships in Brazil - Doctorate