Poly(ionic liquids) in electrochemical devices: polyelectrolytes for energy storage and conversion devices and stabilization of graphene and poly(3,4-etylenedioxidethiophene) (PEDOT) for electroactive films obtention

• Grant number: 12/02117-0
• Support type: Scholarships in Brazil - Post-Doctorate
• Effective date (Start): June 01, 2012
• Effective date (End): September 30, 2014
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Roberto Manuel Torresi
• Grantee: Tania Machado Benedetti
• Home Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 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, AP.TEM

Abstract

Poly(ionic liquids) (PIL) are polymers containing one or more common ionic liquids' ionic groups associated to the monomeric unit. This class of materials presents properties of ionic liquids, like: electrochemical and thermal stability and conductivity, as well as from the polymer resulted from the monomers used, like: mechanical stability. This project has as objectives the use of PILs in different applications related to electrochemical devices:1)Use as polyelectrolytes in energy storage and conversion devices: PILs present limited conductivity values; however, it is possible to obtain mixtures of these materials with ionic liquids in different proportions, being possible to obtain gel polyelectrolytes with good conductivity values for this kind of application. 2)Graphene stabilization: Graphene in a promising material in order to obtain its maximum efficiency, it is necessary to maintain its layers as isolated as possible when they are immobilized on the current collector. PILs can be used as stabilizer and, in addition, act as ionic conductor among the different graphene layers.3)PEDOT stabilization: PEDOT is commonly used as a composite with poly(stirenesulphonate) (PSS) due the fact of being non soluble in almost all solvents. PILs are a good alternative to PSS, which presents issues related with its high acidity.

Scientific publications

(9)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

FERNANDEZ, R. A.; BENEDETTI, T. M.; TORRESI, R. M. Comparative electrochemical performance of electrodeposited polypyrrole in protic and aprotic ionic liquids. Journal of Electroanalytical Chemistry, v. 737, n. SI, p. 23-29, JAN 15 2015. Web of Science Citations: 7.

BENEDETTI, TANIA M.; CARVALHO, TANIA; LWAKURA, DANIEL C.; BRAGA, FILIPE; VIEIRA, BRUNA R.; VIDINHA, PEDRO; GRUBER, JONAS; TORRESI, ROBERTO M. All solid-state electrochromic device consisting of a water soluble viologen dissolved in gelatin-based ionogel. SOLAR ENERGY MATERIALS AND SOLAR CELLS, v. 132, p. 101-106, JAN 2015. Web of Science Citations: 14.

MIGUEL, FERNANDO H. C.; BENEDETTI, TANIA M.; TORRESI, ROBERTO M.; CORDOBA DE TORRESI, SUSANA I. QCM-D studies of polypyrrole influence on structure stabilization of beta phase of Ni(OH)(2) nanoparticles during electrochemical cycling. Electrochemistry Communications, v. 48, p. 164-168, NOV 2014. Web of Science Citations: 4.

LODOVICO, LUCAS; MARTINS, VITOR L.; BENEDETTI, TANIA M.; TORRESI, ROBERTO M. Electrochemical Behavior of Iron and Magnesium in Ionic Liquids. Journal of the Brazilian Chemical Society, v. 25, n. 3, p. 460-U236, MAR 2014. Web of Science Citations: 6.

BENEDETTI, TANIA M.; TORRESI, ROBERTO M. Rheological Changes and Kinetics of Water Uptake by Poly(ionic liquid)-Based Thin Films. Langmuir, v. 29, n. 50, p. 15589-15595, DEC 17 2013. Web of Science Citations: 16.

BENEDETTI, TANIA M.; GONCALES, VINICIUS R.; CORDOBA DE TORRESI, SUSANA I.; TORRESI, ROBERTO M. In search of an appropriate ionic liquid as electrolyte for macroporous manganese oxide film electrochemistry. Journal of Power Sources, v. 239, p. 1-8, OCT 1 2013. Web of Science Citations: 9.

TORRESI, ROBERTO M.; LODOVICO, LUCAS; BENEDETTI, TANIA M.; ALCANTARA, MARIA R.; DEBIEMME-CHOUVY, CATHERINE; DESLOUIS, CLAUDE. Convective mass transport in ionic liquids studied by electrochemical and electrohydrodynamic impedance spectroscopy. Electrochimica Acta, v. 93, p. 32-43, MAR 30 2013. Web of Science Citations: 5.

BENEDETTI, TANIA M.; REDSTON, EMILY; MENEZES, WILLIAN G.; REIS, DAYANE M.; SOARES, JAISA F.; ZARBIN, ALDO J. G.; TORRESI, ROBERTO M. Lithium intercalation in nanostructured thin films of a mixed-valence layered vanadium oxide using an ionic liquid electrolyte. Journal of Power Sources, v. 224, p. 72-79, FEB 15 2013. Web of Science Citations: 8.

SANCHEZ, NEDHER; BENEDETTI, TANIA M.; VAZQUEZ, MARIO; CORDOBA DE TORRESI, SUSANA I.; TORRESI, ROBERTO M. Kinetic and Thermodynamic Studies on the Adsorption of Reactive Red 239 by Carra Sawdust Treated with Formaldehyde. ADSORPTION SCIENCE & TECHNOLOGY, v. 30, n. 10, p. 881-899, DEC 2012. Web of Science Citations: 7.