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Polarizable force fields for the Investigation of sodium-ion battery materials

Grant number: 22/05652-5
Support Opportunities:Scholarships abroad - Research Internship - Post-doctor
Effective date (Start): October 01, 2022
Effective date (End): September 30, 2023
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Principal Investigator:Juarez Lopes Ferreira da Silva
Grantee:Tuanan da Costa Lourenço
Supervisor: Barbara Kirchner
Host Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Research place: Universität Bonn, Germany  
Associated to the scholarship:19/23681-0 - From ab initio to continuum methods to the screening of sodium-ion battery materials, BP.PD


The implementation of new renewable energy sources is a necessary step toward the mitigation of the CO2 emissions and the control of climate changes. However, due to the intermittent nature of these sources, it is necessary to use energy storage technologies such as supercapacitors and batteries. The low availability of lithium on Earth makes lithium batteries, the most batteries used today, not sufficient to meet the future demand for batteries. Therefore, in recent years, much effort has been made to develop batteries of sodium-ion (SIB). Among the main limiting factors for these batteries, we can mention the formation of the solid electrolyte interface (SEI) on the anode surface, which occurs by side reactions between the electrolyte and the electrode surface. An alternative to mitigate the impacts of SEI formation is the use of electrolytes based on ionic liquids (ILs), which result in a robust SEI, which contributes to the transport of Na+ ions from the bulk region to the electrode surface. To increase the understanding of SEI formation in ILs, an atomistic investigation is needed, focusing on the interactions between ions and their transport. In this project, we propose to carry out molecular dynamics (MD) simulations using polarizable force fields for IL-based electrolytes. In addition to the MD simulations, density functional theory calculations can be carried out to complement the information obtained from the MD simulations and also to obtain different properties that influence the formation of the SEI, such as the stability of ions and the energy costs of interactions. (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)
LOURENCO, TUANAN C.; SIQUEIRA, LEONARDO J. A.; DIAS, LUIS G.; DA SILVA, JUAREZ L. F.. Identification of sodiation mechanisms in graphite-based negative electrodes by molecular dynamics simulations combined with potential of mean force. Electrochimica Acta, v. 468, p. 13-pg., . (17/11631-2, 18/21401-7, 22/05652-5, 19/23681-0)

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