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

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Title
Ordered-mesoporous Nb2O5/carbon composite as a sodium insertion material
Author(s)
Haegyeom Kim; Eunho Lim; Changshin Jo; Gabin Yoon; Jongkook Hwang; Sanha Jeong; Jinwoo Lee; Kisuk Kang
Publication Date
2015-09
Journal
NANO ENERGY, v.16, no., pp.62 - 70
Publisher
Elsevier 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. © 2015 Elsevier Ltd
URI
https://pr.ibs.re.kr/handle/8788114/1891
ISSN
2211-2855
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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