期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 11, 期 19, 页码 3748-3755出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b821389p
关键词
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资金
- ETH [TH-29/05-2, TH-09/06-2]
- ARC Centre of Excellence [CE0561616]
- University of Wollongong, Australia
- Electron Microscopy Center of the ETH Zurich (EMEZ)
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 (similar to 32 m(2) 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)).
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