Anisotropic vanadium oxide nanostructured host matrices for lithium ion intercalation
O'Dwyer, Colm (University College Cork. Tyndall National Institute)
Lavayen, Vladimir G. (University College Cork. Tyndall National Institute)
Santa Ana, María Angélica (Universidad de Chile)
Benavente, Eglantina (Universidad Tecnológica Metropolitana (Xile))
González, Guillermo (Universidad de Chile)
Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia)
Universitat Autònoma de Barcelona

Date:	2007
Abstract:	We report on unique high-volume low-dimensional V O-based turbostratic nanostructures, prepared using sol-gel synthetic methods from VO ṡ n H 2 O xerogels. Electrochemical intercalation of Li to form Li VO resulted in a maximum measured charge capacity of 1225mAh g as the β- Li VO phase. Conductivities of the order of 10 Scm were found on compressed-nanotube parallelepipedal samples, which exhibit an anisotropy factor of 70 at room temperature by preferential alignment of the nanotubes. The improved electrochemical properties observed in novel vanadium oxide nanostructured arrays are attributed to the increased volumetric density for ion intercalation, shorter diffusion paths to the intercalation sites, and a high degree of crystallinity ofthe individual nanotubular host structures.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	Research Letters in Physical Chemistry, Vol. 2007 (August 2007) , art. 32528, ISSN 1687-6881

DOI: 10.1155/2007/32528

6 p, 2.2 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles