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Ceramics of lithium titanate obtained by the OPM route

Grant number: 14/25616-7
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): February 01, 2015
Effective date (End): June 30, 2015
Field of knowledge:Physical Sciences and Mathematics - Chemistry
Principal Investigator:Emerson Rodrigues de Camargo
Grantee:Lucas da Silva Ribeiro
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Associated research grant:13/07296-2 - CDMF - Center for the Development of Functional Materials, AP.CEPID

Abstract

Lithium titanate (Li4Ti5O12, or simply LTO) with spinel structure is a promising material for lithium batteries anodes. There are several techniques for the synthesis of this material, but the use of the oxidant peroxide route (OPM) to obtain titanium dioxide with the surface modified with peroxide groups seems to be superior due the absence of halides and residual carbon, usual contaminants deleterious for eletro-electronic applications. Another advantage is the total absence of toxic residues in agreement with the principles of green chemistry. On the other hand, sintered ceramics obtained by microwaves show uniform microstructures, high densities e superior properties than that found in samples obtained by conventional techniques. In this Projetc, LTO samples will be synthesized through the OPM route and will be characterized by X ray diffraction, Raman spectroscopy and electronic microscopy. Crystalline LTO will be used to fabricate dense ceramic sample by means conventional and microwave irradiation.