High-Rate Charge/Discharge Properties of Li Ion Secondary Battery Using V2O5/Carbon Composite Electrodes with Carbon Fiber

Abstract:

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The charge/discharge properties of V2O5/carbon composites with controlled microstructures were investigated to achieve a high-rate lithium electrode performance. Composite electrodes were synthesized by mixing a V2O5 sol, carbon and a surfactant, followed by drying. V2O5/AB (acetylene black) and V2O5/VGCF (vapor-grown carbon fiber) composite electrodes showed high-rate charge/discharge properties only when they had very high carbon contents. V2O5/ (AB and VGCF) composite electrodes with controlled microstructures exhibited a discharge capacity of 245 mA·h·g-1 at a high current density of 40 A·g-1, which was approximately 70% of that at a low current density of 100 mA·g-1. The improvement in the high-rate charge/discharge properties was attributed to the short lithium ion diffusion distance, large reaction area and high electronic conductivity of those composite electrodes.

Info:

Periodical:

Edited by:

Masaru Miyayama, Tadashi Takenaka, Masasuke Takata and Kazuo Shinozaki

Pages:

159-162

DOI:

10.4028/www.scientific.net/KEM.301.159

Citation:

A. Kuwahara et al., "High-Rate Charge/Discharge Properties of Li Ion Secondary Battery Using V2O5/Carbon Composite Electrodes with Carbon Fiber", Key Engineering Materials, Vol. 301, pp. 159-162, 2006

Online since:

January 2006

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Price:

$35.00

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