Comprehensive design of carbon-encapsulated Fe3O4nanocrystals and their lithium storage properties
Authors:
- Youngmin LeeYLYoungmin Lee
- Mi Ru JoMJMi Ru Jo
- Ki Min NamKNKi Min Nam
- Yong-Mook KangYKYong-Mook Kang
- 27 November 2012
- journal article
- Published by IOP Publishing in Nanotechnology
- Vol. 23 (50) , 505401
Abstract
Controlling the bulk and surface structure of metal oxide nanostructures is crucial to obtain superior electronic and electrochemical properties. However, the synthetic or post-treatment techniques for preparing such structures, especially those with complex configurations, still remains a challenge. Herein, we report a completely novel approach-an amorphous carbon coating on the surface coupled with a controlled metal oxidation state in the bulk-via a simple glucose treatment. The bulk and surface structures of iron oxides are controlled by the carbothermal reaction associated with the decomposition of glucose. These novel configurations of iron oxides possess an amorphous carbon layer and ferrous state with high electronic conductivity, which definitely enhances their electrochemical properties compared to pristine iron oxides. Our findings provide an effective solution for the synthesis of complex metal oxide nanostructures, which can pave the way to further expand the electronic or electrochemical applications of metal oxides.Keywords
This publication has 26 references indexed in Scilit:
- Carbon Coated Fe3O4 Nanospindles as a Superior Anode Material for Lithium‐Ion BatteriesAdvanced Functional Materials, 2008
- Effects of low-temperature carbon encapsulation on the electrochemical performance of SnO2 nanopowdersCarbon, 2008
- Amorphous Carbon-Coated Silicon Nanocomposites: A Low-Temperature Synthesis via Spray Pyrolysis and Their Application as High-Capacity Anodes for Lithium-Ion BatteriesThe Journal of Physical Chemistry C, 2007
- Issues and challenges facing rechargeable lithium batteriesNature, 2001
- Searching for new anode materials for the Li-ion technology: time to deviate from the usual pathJournal of Power Sources, 2001
- Nano-sized transition-metal oxides as negative-electrode materials for lithium-ion batteriesNature, 2000
- A room temperature study of the binary lithium–silicon and the ternary lithium–chromium–silicon system for use in rechargeable lithium batteriesJournal of Power Sources, 1999
- Insertion Electrode Materials for Rechargeable Lithium BatteriesAdvanced Materials, 1998
- Tin-Based Amorphous Oxide: A High-Capacity Lithium-Ion-Storage MaterialScience, 1997
- Mechanisms for Lithium Insertion in Carbonaceous MaterialsScience, 1995