Flame spray-pyrolyzed vanadium oxide nanoparticles for lithium battery cathodes

Authors

See How Ng, University of WollongongFollow
T J. Patey, Paul Scherrer Institut, Switzerland
R Buchel, Dep. Mechanical Process Eng. Switzerland
F Krumeich, Lab of Inorganic Chemistry, Switzerland
Jiazhao Wang, University of WollongongFollow
Hua-Kun Liu, University of WollongongFollow
S E. Pratsinis, Particle Technology Laboratory
P Novak, Paul Scherrer Institut, Switzerland

RIS ID

31399

Publication Details

Ng, S., Patey, T. J., Buchel, R., Krumeich, F., Wang, J., Liu, H. K., Pratsinis, S. E. Novak, P. (2009). Flame spray-pyrolyzed vanadium oxide nanoparticles for lithium battery cathodes. Physical Chemistry Chemical Physics, 11 (19), 3748-3755.

Abstract

Vanadium pentoxide (V₂O₅) nanoparticles (30–60 nm) were made by a one-step and scalable flame spray pyrolysis (FSP) process. Optimization of the FSP processing conditions (precursor concentration and injection rate) enhanced the electrochemical performance of these nanoparticles. Increasing the cut-off potential for discharging from 1.5 to 2.5 V vs. Li/Li⁺ improved the cycle life of these V₂O₅ nanoparticles. Particles with the lowest specific surface area (32 m² g⁻¹) and highest phase purity (up to 98 wt%) showed excellent cyclability between 2.5 and 4.0 V vs. Li/Li⁺, retaining a specific charge of 110 mAh g⁻¹ beyond 100 cycles at a specific current of 100 mA g⁻¹, and also superior specific charge of 100 mAh g⁻¹ at specific current up to 20C rate (or 2000 mA g⁻¹).