Ordered-mesoporous Nb2O5/carbon composite as a sodium insertion material
SCIE
SCOPUS
- Title
- Ordered-mesoporous Nb2O5/carbon composite as a sodium insertion material
- Authors
- Kim, H; Lim, E; Jo, C; Yoon, G; Hwang, J; Jeong, S; Lee, J; Kang, K
- Date Issued
- 2015-09
- Publisher
- ELSEVIER SCIENCE BV
- 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.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/35584
- DOI
- 10.1016/J.NANOEN.2015.05.015
- ISSN
- 2211-2855
- Article Type
- Article
- Citation
- NANO ENERGY, vol. 16, page. 62 - 70, 2015-09
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