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Ordered-mesoporous Nb2O5/carbon composite as a sodium insertion material

Cited 70 time in Web of Science Cited 72 time in Scopus
Authors
Kim, Haegyeom; Lim, Eunho; Jo, Changshin; Yoon, Gabin; Hwang, Jongkook; Jeong, Sanha; Lee, Jinwoo; Kang, Kisuk
Issue Date
2015-09
Citation
Nano Energy, Vol.16, pp.62-70
Keywords
MesoporousNb2O5Intercalation compoundsElectrodeSodium ion batteries
Abstract
The present work introduces a new intercalation host for the Na ions, Nb2O5, and proposes that a mesoporous Nb2O5/carbon composite can function as a promising sodium insertion material. The highly ordered mesoporous Nb2O5/carbon electrode, synthesized using a block copolymer-assisted one-pot method, demonstrated not only a stable cycle life, but also outstanding rate capability. The excellent Na storage properties of the Nb2O5/carbon electrode were due to the uniquely ordered mesoporous nanostructure and in situ carbon formation whose configuration provided a large electrode-electrolyte interface area and enhanced Na ion and electron transport. Ex situ analyses revealed that Nb2O5 stores Na ions through Na de/intercalation reactions combined with surface capacitive reactions, after the activation process during the first sodiation. (C) 2015 Elsevier Ltd. All rights reserved.
ISSN
2211-2855
URI
http://hdl.handle.net/10371/165079
DOI
https://doi.org/10.1016/j.nanoen.2015.05.015
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Material Science and Engineering (재료공학부) Journal Papers (저널논문_재료공학부)
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