A surfactant-assisted solvothermal synthesis is hereby applied to produce carbon-coated LiFePO4/C nanostructured Li-ion battery cathodes. The use of different mixed alcohol/water solutions for the dissolution of a cationic surfactant is absolutely peculiar in this field and herewith exploited to tailor-make the properties of the active material particles (e.g., morphology and electrochemical behaviour). Thorough investigation is carried out by means of X-ray powder diffraction, scanning and transmission electron microscopy, cyclic voltammetry and constant current charge-discharge cycling. The best performing sample, obtained in a 20:80 w/w ethanol:water solution, demonstrates good specific capacity values, high Coulombic efficiency and rate capability, with stable behaviour upon long-term cycling even at ultrafast 100C discharge regime. This is definitely remarkable for a nanosized powder specifically conceived for high power applications obtained by means of low cost raw materials, simple and reliable procedures.

Surfactant-assisted mild solvothermal synthesis of nanostructured LiFePO4/C cathodes evidencing ultrafast rate capability / DI LUPO, Francesca; Meligrana, Giuseppina; Gerbaldi, Claudio; Bodoardo, Silvia; Penazzi, Nerino. - In: ELECTROCHIMICA ACTA. - ISSN 0013-4686. - STAMPA. - 156:(2015), pp. 188-198. [10.1016/j.electacta.2015.01.048]

Surfactant-assisted mild solvothermal synthesis of nanostructured LiFePO4/C cathodes evidencing ultrafast rate capability

DI LUPO, FRANCESCA;MELIGRANA, Giuseppina;GERBALDI, CLAUDIO;BODOARDO, SILVIA;PENAZZI, NERINO
2015

Abstract

A surfactant-assisted solvothermal synthesis is hereby applied to produce carbon-coated LiFePO4/C nanostructured Li-ion battery cathodes. The use of different mixed alcohol/water solutions for the dissolution of a cationic surfactant is absolutely peculiar in this field and herewith exploited to tailor-make the properties of the active material particles (e.g., morphology and electrochemical behaviour). Thorough investigation is carried out by means of X-ray powder diffraction, scanning and transmission electron microscopy, cyclic voltammetry and constant current charge-discharge cycling. The best performing sample, obtained in a 20:80 w/w ethanol:water solution, demonstrates good specific capacity values, high Coulombic efficiency and rate capability, with stable behaviour upon long-term cycling even at ultrafast 100C discharge regime. This is definitely remarkable for a nanosized powder specifically conceived for high power applications obtained by means of low cost raw materials, simple and reliable procedures.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11583/2589164
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