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Fe2O3 Nanoparticles Wrapped in Multi-walled Carbon Nanotubes With Enhanced Lithium Storage Capability.
- Source :
- Scientific Reports; 12/6/2013, p1-6, 6p
- Publication Year :
- 2013
-
Abstract
- We have designed a novel hybrid nanostructure by coating Fe<subscript>2</subscript>O<subscript>3</subscript> nanoparticles with multi-walled carbon nanotubes to enhance the lithium storage capability of Fe<subscript>2</subscript>O<subscript>3</subscript>. The strategy to prepare Fe<subscript>2</subscript>O<subscript>3</subscript>@MWCNTs involves the synthesis of Fe nanoparticles wrapped in MWCNTs, followed by the oxidation of Fe nanoparticles under carbon dioxide. When used as the anode in a Li-ion battery, this hybrid material (70.32 wt% carbon nanotubes, 29.68 wt% Fe<subscript>2</subscript>O<subscript>3</subscript>) showed a reversible discharge capacity of 515 mAhg<superscript>-1</superscript> after 50 cycles at a density of 100 mAg<superscript>-1</superscript> and the capacity based on Fe<subscript>2</subscript>O<subscript>3</subscript> nanoparticles was calculated as 1147 mAhg<superscript>-1</superscript>, Three factors are responsibile for the superior performance: (1) The hollow interiors of MWCNTs provide enough spaces for the accommodation of large volume expansion of inner Fe<subscript>2</subscript>O<subscript>3</subscript> nanoparticles, which can improving the stability of electrode; (2) The MWCNTs increase the overall conductivity of the anode; (3) A stable solid electrolyte interface film formed on the surface of MWCNTs may reduce capacity fading. [ABSTRACT FROM AUTHOR]
- Subjects :
- NANOSTRUCTURES
NANOPARTICLES
CARBON dioxide
NANOTUBES
ELECTRODES
Subjects
Details
- Language :
- English
- ISSN :
- 20452322
- Database :
- Complementary Index
- Journal :
- Scientific Reports
- Publication Type :
- Academic Journal
- Accession number :
- 93310367
- Full Text :
- https://doi.org/10.1038/srep03392