Electrochemical properties of spinel Li4Ti5O12 nanoparticles prepared via a low-temperature solid route
详细信息 查看全文
- 作者：Mamoru Senna ; Martin Fabián ; Ladislav Kavan…
- 关键词：Li4Ti5O12 ; Reactive precursor ; Li ; ion battery anode ; Cyclic voltammetry ; Impurity phases
- 刊名：Journal of Solid State Electrochemistry
- 出版年：2016
- 出版时间：October 2016
- 年：2016
- 卷：20
- 期：10
- 页码：2673-2683
- 全文大小：1,854 KB
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Physical Chemistry
Analytical Chemistry
Industrial Chemistry and Chemical Engineering
Characterization and Evaluation Materials
Condensed Matter
Electronic and Computer Engineering - 出版者：Springer Berlin / Heidelberg
- ISSN：1433-0768
- 卷排序：20
文摘
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.