Crystallinity-Controlled Titanium Oxide–Carbon Nanocomposites with Enhanced Lithium Storage Performance
SCIE
SCOPUS
- Title
- Crystallinity-Controlled Titanium Oxide–Carbon Nanocomposites with Enhanced Lithium Storage Performance
- Authors
- Zhou, Y; Lee, J; Lee, CW; Wu, M; Yoon, S
- Date Issued
- 2012-12
- Publisher
- WILEY-BLACKWELL
- Abstract
- Nanocomposites of crystalline-controlled TiO2carbon are prepared by a novel one-step approach and applied in anodes of lithium ion batteries. In our nanocomposite anodes, the Li+ capacity contribution from the TiO2 phase was enormous, above 400 mAh?g-1 (Li1+xTiO2, x>0.2), and the volumetric capacity was as high as 877 mAh?cm-3 with full voltage utilization to 0 V versus Li/Li+, which resulted in higher energy density than that of state-of-the-art titania anodes. For the first time, it was clearly revealed that the capacity at 1.2 and 2.0 V corresponded to Li+ storage at amorphous and crystalline TiO2, respectively. Furthermore, improvements in the rate capability and cycle performance were observed; this was attributed to resistance reduction induced by higher electrical/Li+ conduction and faster Li+ diffusion.
- Keywords
- crystallinity; electrochemistry; lithium; nanostructures; titanium; NEGATIVE-ELECTRODE MATERIALS; ION BATTERIES; ANODE MATERIALS; ELECTROCHEMICAL PROPERTIES; SECONDARY BATTERIES; TIO2 NANOTUBES; RUTILE TIO2; CAPACITY; ANATASE; COMPOSITES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/16094
- DOI
- 10.1002/CSSC.201200450
- ISSN
- 1864-5631
- Article Type
- Article
- Citation
- CHEMSUSCHEM, vol. 5, no. 12, page. 2376 - 2382, 2012-12
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.