Anisotropic vanadium oxide nanostructured host matrices for lithium ion intercalation

Colm O'Dwyer, V. Lavayen, M. A. Santa Ana, E. Benavente, G. González, C. M. Sotomayor Torres

Research output: Contribution to journalArticleResearchpeer-review

5 Citations (Scopus)

Abstract

We report on unique high-volume low-dimensional V2 O5-based turbostratic nanostructures, prepared using sol-gel synthetic methods from V2O5 ṡ n H 2 O xerogels. Electrochemical intercalation of Li+ to form Li0.65 V2O5 resulted in a maximum measured charge capacity of 1225mAh g-1 as the β- Lix V2O5 phase. Conductivities of the order of 10-3 Scm-1 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.
Original languageEnglish
Article number32528
JournalResearch Letters in Physical Chemistry
Volume2007
DOIs
Publication statusPublished - 1 Dec 2007

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