Sol-gel-based template synthesis and Li-insertion rate performance of nanostructured vanadium pentoxide

Journal Article · Wed Sep 01 04:00:00 EDT 1999 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1392451· OSTI ID:20003169

Patrissi, C J; Martin, C R

The authors have prepared nanostructured electrodes of orthorhombic V{sub 2}O{sub 5} using the template synthesis method. These electrodes were used to investigate the effects of Li-ion diffusion distance and surface area on V{sub 2}O{sub 5} rate capability. Nanowires of V{sub 2}O{sub 5} were prepared by depositing a precursor into the pores of microporous polycarbonate filtration membranes. This procedure yielded an ensemble of 115 nm diam, 2 {micro}m long nanowires of C{sub 2}{sub 5} which protruded from a V{sub 2}O{sub 5} surface layer like the bristles of a brush. The galvanostatic discharge performance of these nanostructured V{sub 2}O{sub 5} electrodes was compared to a thin-film electrode of similar V{sub 2}O{sub 5} mass and geometric area. The Li{sup +} 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 C, the nanostructured electrode delivered three times the capacity of the thin film electrode. Above 500 C the nanostructured electrode delivered four times the capacity of the thin-film control electrode.

• Research Organization: Colorado State Univ., Fort Collins, CO (US)
• OSTI ID: 20003169
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 9 Vol. 146; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
36 MATERIALS SCIENCE
ELECTRODES
LITHIUM
MEMBRANES
METAL-NONMETAL BATTERIES
SOL-GEL PROCESS
SYNTHESIS
VANADIUM OXIDES