An architectured TiO2 nanosheet with discrete integrated nanocrystalline subunits and its application in lithium batteries
- Title
- An architectured TiO2 nanosheet with discrete integrated nanocrystalline subunits and its application in lithium batteries
- Author
- Kwan-San Hui
- Keywords
- ANATASE TITANIA NANOSTRUCTURES; ION BATTERIES; ELECTROCHEMICAL PROPERTIES; ANODE MATERIAL; STORAGE; TRANSFORMATION; INTERCALATION; NANOMATERIALS; EQUILIBRIUM; NANOWIRES
- Issue Date
- 2012-07
- Publisher
- Royal Society of Chemistry
- Citation
- Journal of materials chemistry, 2012, 22(40), P.21513-21518
- Abstract
- An anatase TiO2 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 TiO2 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 TiO2 nanosheets produced under equilibrium and non-equilibrium conditions, the local structure collapse transformation mechanism from the hydrogen titanate nanosheet to the anatase TiO2 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.
- URI
- http://pubs.rsc.org/en/content/articlelanding/2012/jm/c2jm33085g#!divAbstracthttp://hdl.handle.net/20.500.11754/66385
- ISSN
- 0959-9428
- DOI
- 10.1039/C2JM33085G
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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