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. ORCID: https://orcid.org/0000-0001-7089-7587, 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 Oct 2022 01:37
URI: https://ueaeprints.uea.ac.uk/id/eprint/60694
DOI: 10.1039/c2jm33085g

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