Sol-Gel-Based Template Synthesis and Li-Insertion Rate Performance of Nanostructured Vanadium Pentoxide
Abstract
We have prepared nanostructured electrodes of orthohombic V205 using the template synthesis method. These electrodes were used to investigate the effects of Li-ion diffusion distance and surface area on V2O5 rate capability. Nanowires of V2O5 were prepared by depositing a precursor into the pores of microporous polycarbonate filtration membranes. This procedure yielded an ensemble of 115 nm diameter, 2 micrometers long nanowires of V2O5 which protruded from a V2O5 surface layer like the bristles of a brush. The galvanostatic discharge performance of these nanostructured V2O5 electrodes was compared to a thin film electrode of similar V2O5 mass and geometric area. The Li(+) storage capacity of the thin film electrode was equivalent to that of the nanostructured electrode at low (C/20) discharge rates. However, at a rate of 200 deg C, the nanostructured electrode delivered three times the capacity of the thin film electrode. Above 500 deg C the nanostructured electrode delivered four times the capacity of the thin film control electrode.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1999
- Accession Number
- ADA365183
Entities
People
- Charles J. Patrissi
- Charles R. Martin
Organizations
- Colorado State University