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Surface modification of cathodes for lithium ion batteries: electrode/electrolyte interface studies

Grant number: 19/07638-7
Support type:Scholarships abroad - Research Internship - Post-doctor
Effective date (Start): July 01, 2019
Effective date (End): June 30, 2020
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Principal researcher:Roberto Manuel Torresi
Grantee:Ivonne Eliana Monje López
Supervisor abroad: Daniel Belanger
Home Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Research place: Université du Québec à Montréal (UQÀM), Canada  
Associated to the scholarship:17/20043-7 - Nanoparticles for the formation of porous silicon and as conductive additives for anode in Lithium Ion Batteries, BP.PD


Surface modification of cathodes for Lithium Ion Batteries. Electrode/electrolyte interface studies. The fast-growing demand for high-energy storage systems have stimulated extensive research interest in Li-ion batteries (LIBs). Although commercial LIBs for portable electric devices are in the market more than two decades ago, Li-ion batteries for electric vehicles and plug-in hybrid electric vehicles are under active commercial development. The principal remaining challenge is to develop safety and low-cost batteries with high energy and power densities as well as long cycling life, since the electric vehicle´s autonomy is directly proportional to the battery capacity. In order to solve these challenges, nowadays there is enormous interest in the replacement of the present battery components by materials with better performance, especially in those to be used as cathodes and electrolytes. In this project, we will be focus on the cathode and its interaction with different electrolytes. First, it will be evaluate three commercial cathodes which will be surface modified at different conditions. Secondly, it will be explored the electrodeelectrolyte interface formed when cathodes are in contact with traditional electrolytes (based on combinations of linear and cyclic alkyl carbonates) and with different ionic liquids synthesized in our lab. In addition, aspects related to Li-ion degradation, as well as to determine how the electrodes or interfaces age with time either under cycling or storage conditions will studied by mean of conventional and post-mortem studies of the batteries. This combination has rarely been study in the literature, especially considering that both, the coating method and electrolytes are exclusively developed in our laboratory. (AU)

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Scientific publications
(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)
SANCHEZ-RAMIREZ, NEDHER; MONJE, IVONNE E.; MARTINS, VITOR L.; BELANGER, DANIEL; CAMARGO, PEDRO H. C.; TORRESI, ROBERTO M.. Four Phosphonium-based Ionic Liquids. Synthesis, Characterization and Electrochemical Performance as Electrolytes for Silicon Anodes. CHEMISTRYSELECT, v. 7, n. 4, . (14/01987-6, 20/08553-2, 19/26309-4, 19/07638-7, 17/20043-7, 15/11164-0, 15/26308-7, 21/07297-5)

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