Please use this identifier to cite or link to this item:
Title: Nitrogen-doped carbon-encapsulation of Fe 3O 4 for increased reversibility in Li + storage by the conversion reaction
Authors: Ma, Y.
Zhang, C.
Ji, G.
Lee, J.Y. 
Issue Date: 28-Apr-2012
Citation: Ma, Y., Zhang, C., Ji, G., Lee, J.Y. (2012-04-28). Nitrogen-doped carbon-encapsulation of Fe 3O 4 for increased reversibility in Li + storage by the conversion reaction. Journal of Materials Chemistry 22 (16) : 7845-7850. ScholarBank@NUS Repository.
Abstract: One great challenge in designing anode materials for lithium-ion batteries is to satisfy the concurrent requirements for good capacity retention, high rate performance and low first cycle losses. We report here the design and synthesis of a nitrogen-doped carbon encapsulated Fe 3O 4 composite which performed very well in all these areas. The composite with the optimized carbon content not only showed a high reversible capacity of ∼850 mA h g -1 for 50 cycles at 100 mA g -1, but was also able to maintain a stable cycling performance at a twenty-fold increase in current density to 2000 mA g -1. More importantly, the composite significantly lowered the irreversible capacity loss in the first cycle compared with other iron oxide anodes reported in the literature. Characterization of the electrode/electrolyte interface indicated the presence of a protective solid electrolyte interface (SEI) layer in which chemically stable LiF and FeF 3 were the major constituents. Thus, it is believed that the N-doped carbon coating had effectively modified the surface chemistry at the anode/electrolyte interface to increase the columbic efficiency of cycling and to reduce the secondary reactions in the first cycle of use. © 2012 The Royal Society of Chemistry.
Source Title: Journal of Materials Chemistry
ISSN: 09599428
DOI: 10.1039/c2jm30422h
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Sep 17, 2018


checked on Sep 17, 2018

Page view(s)

checked on Aug 3, 2018

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.