Flame spray-pyrolyzed vanadium oxide nanoparticles for lithium battery cathodes

Autor:	Frank Krumeich, Sotiris E. Pratsinis, Robert Büchel, Timothy J. Patey, S.H. Ng, Hua-Kun Liu, Jiazhao Wang, Petr Novák
Rok vydání:	2009
Předmět:	Materials science Inorganic chemistry Oxide General Physics and Astronomy Nanoparticle chemistry.chemical_element Vanadium Lithium battery Vanadium oxide chemistry.chemical_compound Chemical engineering chemistry Specific surface area Pentoxide Lithium Physical and Theoretical Chemistry
Zdroj:	Physical Chemistry Chemical Physics. 11:3748
ISSN:	1463-9084 1463-9076
DOI:	10.1039/b821389p
Popis:	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 (approximately 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)).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ffb84713782f536fb3e9811d03039d4 https://doi.org/10.1039/b821389p Zobrazit plný text záznamu