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

*Corresponding author for this work

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)2673-2683
Number of pages11
JournalJournal of solid state electrochemistry
Volume20
Issue number10
DOIs
Publication statusPublished - 1 Oct 2016

Keywords

  • Cyclic voltammetry
  • Impurity phases
  • Li-ion battery anode
  • LiTiO
  • Reactive precursor

ASJC Scopus subject areas

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

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