Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5439238 | Ceramics International | 2017 | 6 Pages |
Abstract
In order to further expand the application of lithium titanate anode materials for lithium ion batteries (LIBs), a series of Sr1âxNa2xLi2Ti6O14 (x=0, 0.25, 0.5, 0.75, 1) have been synthesized by the solid-state method. The structure, morphology and their electrochemical properties have been investigated by X-ray diffraction (XRD), scanning electronic microscope (SEM), high-resolution transmission electron microscope (HRTEM), galvanostatic charge-discharge tests and electrochemical impedance spectroscopy (EIS) measurements. Electrochemical analysis suggests Sr0.5NaLi2Ti6O14 to show the better cycling stability, delivering a charge capacity of 184 mA h gâ1 at the current density of 50 mA gâ1 for the first cycle, and to exhibit reversible capacity of 176.8 mA h gâ1 after 50 cycles corresponding to 0.0782% capacity decrease per cycle. Besides, Sr0.5NaLi2Ti6O14 also has the highest lithium-ion diffusion coefficient among all the examined samples.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Hua Lan, Shangshu Qian, Qin Wang, Lei Yan, Haoxiang Yu, Peng Li, Nengbing Long, Miao Shui, Jie Shu,