Molecular dynamics of hybrid ionic materials for lithium battery

• Grant number: 08/08670-7
• Support type: Research Grants - Young Investigators Grants
• Duration: March 01, 2009 - February 28, 2013
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal researcher: Leonardo José Amaral de Siqueira
• Grantee: Leonardo José Amaral de Siqueira
• Home Institution: Instituto de Ciências Ambientais, Químicas e Farmacêuticas (ICAQF). Universidade Federal de São Paulo (UNIFESP). Campus Diadema. Diadema , SP, Brazil
• Associated grant(s): 13/01382-4 - Computational studies of materials for energy, AV.EXT
• Associated scholarship(s): 09/01759-5 - Molecular Dynamics of Hybrid ionic materials for Lithium Battery., BP.JP

Abstract

Ionic liquids have the ability to dissolve ions, such as, lithium salts. This makes them suitable electrolytes for lithium battery. These electrolytes have a characteristic feature to form ionic clusters due to the strong interaction between lithium and anions. Regarding their use as electrolyte for lithium battery, the lithium clustering effect leads to a decrease in ionic conductivity. In this context, new materials which are able to interact less effectively with lithium ion are highly requested. In this project we propose computational study of new materials with potential ability to decrease the lithium - anion interaction, decreasing the ion clustering. The materials we are concerned about in this project are ionic liquids bearing (-CH2CH2O-)n side chains, where n =2,4 or 6. Oxygen atoms in the side chain of cations would allow a less energetic favourable interaction between lithium ion and anions, decreasing the ion clustering previously mentioned. Nanocomposite formed by clays and poly(ethyleneoxide), PEO, has higher ionic conductivity than the polymer electrolyte PEO/LiBF4 at room temperature. Hybrid materials can be obtained by mixing ionic liquids and clays, which will be exploited as potential electrolyte for lithium battery. A different aspect to be studied concerns polarizable models for ionic liquids from ab initio calculations, using an approach that has been developed in colaboration with Prof. Paul Maddens group at University of Edinburgh. (AU)

Scientific publications

(5)

(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)

DUARTE, DANIEL; SALANNE, MATHIEU; ROTENBERG, BENJAMIN; BIZETO, MARCOS A.; SIQUEIRA, LEONARDO J. A. Structure of tetraalkylammonium ionic liquids in the interlayer of modified montmorillonite. JOURNAL OF PHYSICS-CONDENSED MATTER, v. 26, n. 28 JUL 26 2014. Web of Science Citations: 8.

SALANNE, MATHIEU; SIQUEIRA, LEONARDO J. A.; SEITSONEN, ARI P.; MADDEN, PAUL A.; KIRCHNER, BARBARA. From molten salts to room temperature ionic liquids: Simulation studies on chloroaluminate systems. FARADAY DISCUSSIONS, v. 154, p. 171-188, 2012. Web of Science Citations: 34.

SIQUEIRA, LEONARDO J. A.; RIBEIRO, MAURO C. C. Charge ordering and intermediate range order in ammonium ionic liquids. Journal of Chemical Physics, v. 135, n. 20 NOV 28 2011. Web of Science Citations: 43.

MONTEIRO, MARCELO J.; ANDO, ROMULO A.; SIQUEIRA, LEONARDO J. A.; CAMILO, FERNANDA F.; SANTOS, PAULO S.; RIBEIRO, MAURO C. C.; TORRESI, ROBERTO M. Effect of SO2 on the Transport Properties of an Imidazolium Ionic Liquid and Its Lithium Solution. Journal of Physical Chemistry B, v. 115, n. 31, p. 9662-9670, AUG 11 2011. Web of Science Citations: 12.

DA SILVA, ELAINE F.; SIQUEIRA, LEONARDO J. A.; ALVES, WAGNER A. Monitoring the 1160 cm(-1) band of pyridazine to investigate complexes with formamide. VIBRATIONAL SPECTROSCOPY, v. 55, n. 2, p. 273-278, MAR 2011. Web of Science Citations: 0.