Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7990970 | Journal of Alloys and Compounds | 2018 | 22 Pages |
Abstract
TiN-TiC-modified Li4Ti5O12 materials, known as LTO-TiN-TiC, were synthesized with spinel structures first through a simple one-step solid-phase sintering process in a nitrogen atmosphere with C and Ti as reducing agents. Transmission electron microscopy with X-ray photoelectron spectroscopy, Raman spectroscopy measurements, and energy-dispersive X-ray analysis confirmed that a TiN, TiC thin layer was successfully deposited onto the LTO surface. This work also researched the electrochemical performance of LTO-TiN-TiC nanomaterials, which showed better reversibility and higher rate capability than did pristine LTO. The discharge capacities of the LTO-TiN-TiC electrode were 78, 97, 110, 123, 147, 160 and 168â¯mAh gâ1 at charge/discharge rates of 20, 15, 5, 2, 1 and 0.5â¯C, respectively. The capacity retention was 82.19% and 93.65% after 200 cycles at 20â¯C and 5â¯C, with almost no capacity fading.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Bei-Lei Yan, Wei-Wei Meng, Yong-Jun Xu,