An architectured TiO 2 nanosheet with discrete integrated nanocrystalline subunits and its application in lithium batteries

Ren, Long, Liu, Yundan, Qi, Xiang, Hui, K. S., Hui, K. N., Huang, Zongyu, Li, Jun, Huang, Kai and Zhong, Jianxin (2012) An architectured TiO 2 nanosheet with discrete integrated nanocrystalline subunits and its application in lithium batteries. Journal of Materials Chemistry, 22 (40). pp. 21513-21518. ISSN 0959-9428

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Abstract

An anatase TiO 2 nanosheet with discrete integrated subunits was successfully synthesized via a rapid annealing treatment, which could be classified as non-equilibrium conditions on an as-prepared hydrogen titanate nanosheet. This unique TiO 2 nano-object is uniform in length and width as a "sheet-like" shape which is integrated with numerous discrete nanocrystalline subunits. In contrast with the internal architecture of the TiO 2 nanosheets produced under equilibrium and non-equilibrium conditions, the local structure collapse transformation mechanism from the hydrogen titanate nanosheet to the anatase TiO 2 nanosheet with internal architecture is discussed. This unique anatase nano-object electrode exhibits high reversible lithium ion storage capacities and superior cyclic capacity retention at a high current rate. Such enhanced lithium storage performance could be attributed to the discrete subunits aggregation allowing efficient Li + ion diffusion and the interior anisotropy in the nanosheet can be more effective to buffer the volume variation during the lithium insertion/desertion cycle.

Item Type: Article
Faculty \ School: Faculty of Science > School of Mathematics
Related URLs:
Depositing User: Pure Connector
Date Deposited: 04 Oct 2016 12:02
Last Modified: 22 Apr 2020 01:47
URI: https://ueaeprints.uea.ac.uk/id/eprint/60694
DOI: 10.1039/c2jm33085g

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