High-Rate Charge/Discharge Properties of Li Ion Secondary Battery Using V<sub>2</sub>O<sub>5</sub>/Carbon Composite Electrodes with Carbon Fiber

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.

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High-Rate Charge-Discharge Performances of β-FeOOH-Carbon Composite Electrodes

Electroceramics in Japan VIII - Key Engineering Materials ◽

10.4028/0-87849-982-2.139 ◽

2006 ◽

pp. 139-142

Author(s):

Hideyuki Morimoto ◽

Kazuhiko Takeno ◽

Yuuki Uozumi ◽

Kenichi Sugimoto ◽

Shinichi Tobishima

Keyword(s):

Carbon Composite ◽

High Rate ◽

Composite Electrodes ◽

Charge Discharge

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Metal film deposition on carbon anodes for high rate charge–discharge of Li–ion batteries

Surface Engineering ◽

10.1179/026708499101516560 ◽

1999 ◽

Vol 15 (3) ◽

pp. 225-229 ◽

Cited By ~ 12

Author(s):

T. Takamura ◽

J. Suzuki ◽

C. Yamada ◽

K. Sumiya ◽

K. Sekine

Keyword(s):

Metal Film ◽

Film Deposition ◽

High Rate ◽

Li Ion Batteries ◽

Li Ion ◽

Carbon Anodes ◽

Charge Discharge

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VO2(B)/Graphene Forest for High-Rate Li-Ion Battery

MRS Proceedings ◽

10.1557/opl.2015.536 ◽

2015 ◽

Vol 1773 ◽

pp. 7-14

Author(s):

Guofeng Ren ◽

Zhaoyang Fan

Keyword(s):

Forest Structure ◽

High Current Density ◽

Discharge Rate ◽

High Rate ◽

Li Ion Batteries ◽

3D Scaffold ◽

Vertically Aligned ◽

Li Ion ◽

2D Nanomaterials ◽

Charge Discharge

ABSTRACT2D nanomaterials, when assembled into an ordered macrostructure, will present many great opportunities, including for Li-ion batteries (LIBs). We report densely-packed vertically-aligned VO2(B) nanobelts (NBs)-based forest structure synthesized on edge-oriented graphene (EOG) network. Using a EOG/Ni foam as a 3D scaffold, aligned VO2(B) NBs can be further synthesized into a folded 3D forest structure to construct a freestanding electrode for LIBs. Electrochemical studies found that such a freestanding VO2(B)/EOG electrode, which combines the unique merits of 2D VO2(B) NBs and 2D graphene sheets, has excellent charge-discharge rate performance. A discharge capacity of 178 mAh g-1 at a rate of 59 C and 100 mAh g-1 at 300 C was measured. A good charge-discharge cycling stability under a high current density was also demonstrated. The results indicate VO2(B)/EOG forest based freestanding electrode is very promising for developing high-rate LIBs.

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