Electro-polimerization of ionic liquids

• Grant number: 07/07228-6
• Support type: Scholarships in Brazil - Doctorate (Direct)
• Effective date (Start): June 01, 2008
• Effective date (End): May 31, 2013
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal researcher: Roberto Manuel Torresi
• Grantee: Fernando Reinoldo Scremin
• Home Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 03/10015-3 - Organized arrays of macromolecules and nanostructures for the development of sensors and microbatteries, AP.PRNX.TEM

Abstract

The ionic liquids present diverse characteristics, which become them forts candidates for its use as electrolyte in ion-lithium batteries and other devices. Such characteristics are: not inflammability, it means that the battery becomes more safer; low vapor pressure, even at high temperatures; thermal and chemical stability, these characteristics make possible to increase the limit of the working temperature with security. Also they present electrochemical stability at high potentials and relatively high conductivity; beyond they do not present environmental problems. However, the main problems that present are the low ion-lithium transport number and the small swelling in relation to the materials of electrodes (anode or cathode). In this project, it is intended to get new ionic liquids electro- polymerized, using the substitution in the imidazolium cation with aniline or pyrrole. The electro-polymerization of the ionic liquids will lead to fix the organic cation, allowing the diffusion of ion-lithium. Also it will be possible to get films with similar characteristics to the ionic liquids; so that, it will expect that they possess a continuous interface with the electrolyte and in such a way the swelling process will be intensify producing a reduction of the contact resistance between the different materials (AU)