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.
Originalsprache | englisch |
---|---|
Seiten (von - bis) | 2673-2683 |
Seitenumfang | 11 |
Fachzeitschrift | Journal of Solid State Electrochemistry |
Jahrgang | 20 |
Ausgabenummer | 10 |
DOIs | |
Publikationsstatus | Veröffentlicht - 1 Okt. 2016 |
ASJC Scopus subject areas
- Allgemeine Materialwissenschaften
- Physik der kondensierten Materie
- Elektrochemie
- Elektrotechnik und Elektronik