Artículo de revista
Reduced surfactant uptake in three dimensional assemblies of VOx Nanotubes Improves Reversible Li+ intercalation and charge capacity
Fecha
2009Registro en:
Advanced Functional Materials, Volumen 19, Issue 11, 2018, Pages 1736-1745
1616301X
16163028
10.1002/adfm.200801107
Autor
O'Dwyer, Colm
Lavayen, Vladimir
Tanner, David A.
Newcomb, Simon B.
Benavente Espinosa, Eglantina
González Moraga, Guillermo
Sotomayor Torres, Clivia
Institución
Resumen
The relationship between the nanoscale structure of vanadium pentoxide nanotubes and their ability to accommodate Li+ during intercalation/ deintercalation is explored. The nanotubes are synthesized using two different precursors through a surfactant-assisted templating method, resulting in standalone VOx (vanadium oxide) nanotubes and also "nanourchin". Under highly reducing conditions, where the interlaminar uptake of primary alkylamines is maximized, standalone nanotubes exhibit near-perfect scrolled layers and long-range structural order even at the molecular level. Under less reducing conditions, the degree of amine uptake is reduced due to a lower density of V4+ sites and less V2O5 is functionalized with adsorbed alkylammonium cations. This is typical of the nano-urchin structure. Highresolution TEM studies revealed the unique observation of nanometer-scale nanocrystals of pristine unreacted V 2O5 throughout the length of the nanotubes in the nano-urchin. Electrochemical intercal