Electrochemical properties of spinel Li4Ti5O12 nanoparticles prepared via a low-temperature solid route

Mamoru Senna*, Martin Fabián, Ladislav Kavan, Markéta Zukalová, Jaroslav Briančin, Erika Turianicová, Patrick Bottke, Martin Wilkening, Vladimír Šepelák

*Korrespondierende/r Autor/in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftArtikel

Abstract

Spinel phase Li4Ti5O12 (s-LTO) with an average primary particle size of 150 nm was synthesised via a solid state route by calcining a precursor mixture at 600 °C. The precursor was prepared from a stoichiometric mixture of TiO2 nanoparticles and an ethanolic solution of Li acetate and activated by ball-milling. Effects of the calcination temperature and atmosphere are examined in relation to the coexistence of impurity phases by X-ray diffraction and 6Li MAS NMR. The charge capacity of s-LTO, determined from cyclic voltammogram at a scan rate of 0.1 mV/s, was 142 mAh/g. The capacity of our optimised material is superior to that of commercially available spinel (a-LTO), despite the considerably smaller BET-specific surface area of the former. The superior properties of our material were also demonstrated by galvanostatic charging/discharging. From these observations, we conclude that the presented low-temperature solid state synthesis route provides LTO with improved electrochemical performance.

Originalspracheenglisch
Seiten (von - bis)2673-2683
Seitenumfang11
FachzeitschriftJournal of solid state electrochemistry
Jahrgang20
Ausgabenummer10
DOIs
PublikationsstatusVeröffentlicht - 1 Okt 2016

ASJC Scopus subject areas

  • !!Materials Science(all)
  • !!Condensed Matter Physics
  • !!Electrochemistry
  • !!Electrical and Electronic Engineering

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  • Dieses zitieren

    Senna, M., Fabián, M., Kavan, L., Zukalová, M., Briančin, J., Turianicová, E., ... Šepelák, V. (2016). Electrochemical properties of spinel Li4Ti5O12 nanoparticles prepared via a low-temperature solid route. Journal of solid state electrochemistry, 20(10), 2673-2683. https://doi.org/10.1007/s10008-016-3272-x