Development and improvement of electrochemical capacitors containing ionic liquids as electrolytes

• Grant number: 14/14690-1
• Support type: Scholarships abroad - Research Internship - Post-doctor
• Effective date (Start): February 01, 2015
• Effective date (End): January 31, 2016
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal researcher: Roberto Manuel Torresi
• Grantee: Vitor Leite Martins
• Supervisor abroad: Peter Joseph Hall
• Home Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Research place: University of Sheffield, England
• Associated to the scholarship: 13/22748-7 - Development of High Performance Electrochemical Capacitors Based on Graphene and Ionic Liquids., BP.PD

Abstract

The improvement of energy storage devices is always in development to ensure better systems to the needs in many areas, as portable electronics, electric vehicles and backup system in the electrical grid. The electrochemical capacitors (ECs) are part of the category of energy storage devices that present high-energy storage capability and quick release of this energy. The use of new materials can improve the energy and power of ECs. In case of electrodes, it is important to obtain materials which present high surface area to increase the electrode capacitance and in consequence, the energy. Still, in case of electrolyte, the increase in the working voltage will result in higher energy and power. Thus, the use of Graphene and nanostructured transition metal oxides as electrodes ensures the first requirement, and the use of ionic liquids (ILs) which present high electrochemical stability ensures the second requirement. With this in mind, it is important to determine how the synergy among these materials works in real ECs and the comparison with standard materials. (AU)

Scientific publications

(6)

(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)

MARTINS, VITOR L.; TORRESI, ROBERTO M.; RENNIE, ANTHONY J. R. Design considerations for ionic liquid based electrochemical double layer capacitors. Electrochimica Acta, v. 270, p. 453-460, APR 20 2018. Web of Science Citations: 6.

MARTINS, VITOR L.; RENNIE, ANTHONY J. R.; TORRESI, ROBERTO M.; HALL, PETER J. Ionic liquids containing tricyanomethanide anions: physicochemical characterisation and performance as electrochemical double-layer capacitor electrolytes. Physical Chemistry Chemical Physics, v. 19, n. 25, p. 16867-16874, JUL 7 2017. Web of Science Citations: 10.

POSADA, JORGE OMAR GIL; RENNIE, ANTHONY J. R.; VILLAR, SOFIA PEREZ; MARTINS, VITOR L.; MARINACCIO, JORDAN; BARNES, ALISTAIR; GLOVER, CAROL F.; WORSLEY, DAVID A.; HALL, PETER J. Aqueous batteries as grid scale energy storage solutions. RENEWABLE & SUSTAINABLE ENERGY REVIEWS, v. 68, n. 2, p. 1174-1182, FEB 2017. Web of Science Citations: 69.

MARTINS, VITOR L.; RENNIE, ANTHONY J. R.; LESOWIEC, JUDITH; TORRESI, ROBERTO M.; HALL, PETER J. Using Polymeric Ionic Liquids as an Active Binder in Supercapacitors. Journal of the Electrochemical Society, v. 164, n. 13, p. A3253-A3258, 2017. Web of Science Citations: 2.

RENNIE, ANTHONY J. R.; MARTINS, VITOR L.; SMITH, RACHEL M.; HALL, PETER J. Influence of Particle Size Distribution on the Performance of Ionic Liquid-based Electrochemical Double Layer Capacitors. SCIENTIFIC REPORTS, v. 6, FEB 25 2016. Web of Science Citations: 13.

RENNIE, ANTHONY J. R.; MARTINS, VITOR L.; TORRESI, ROBERTO M.; HALL, PETER J. Ionic Liquids Containing Sulfonium Cations as Electrolytes for Electrochemical Double Layer Capacitors. Journal of Physical Chemistry C, v. 119, n. 42, p. 23865-23874, OCT 22 2015. Web of Science Citations: 23.