Vapor-Diffusion-Controlled Sol−Gel Synthesis of Flaky Lithium Vanadium Oxide and Its Electrochemical Behavior

2010 ◽  
Vol 114 (45) ◽  
pp. 19550-19555 ◽  
Author(s):  
Hong-Li Zhang ◽  
James R. Neilson ◽  
Daniel E. Morse
Keyword(s):  
Vanadium Oxide ◽  
Electrochemical Behavior ◽  
Sol Gel ◽  
Vapor Diffusion ◽  
Lithium Vanadium Oxide ◽  
Diffusion Controlled ◽  
Sol Gel Synthesis

Synthesis of Novel Vanadium Oxide Nanotubes and Nanofibers

2002 ◽  
Vol 740 ◽  
Author(s):  
Samuel T. Lutta ◽  
Hong Dong ◽  
Peter Y. Zavalij ◽  
M. Stanley Whittingham
Keyword(s):  
Thermal Analysis ◽  
Vanadium Oxide ◽  
Electrochemical Behavior ◽  
Redox Reactions ◽  
Sol Gel ◽  
Vanadium Oxides ◽  
Organic Polymer ◽  
Fibrous Morphology ◽  
Surfactant Templates ◽  
Vanadium Oxide Nanotubes

ABSTRACTWe are exploring the synthesis and properties of structured vanadium oxides mainly nanotubes and nanorods. Nanotubes initially formed with surfactant templates have been readily exchanged with simple cations without change of the basal-plane structure. These compounds contain d-like vanadium oxide layers with the vanadium in VO6 octahedra. This structure is particularly suitable for redox reactions. In this paper we report on synthesis of vanadium oxide, (NH4)xV2O5-d·nH2O rods using organic polymer as template. This compound has been synthesized by sol-gel reaction and subsequent hydrothermal treatment. TGA, SEM, XRD and FTIR were used to characterize this compound. Thermal analysis of this compound shows that the fibrous morphology is maintained when it is heated in nitrogen and oxygen above 300 °C. However, in both cases the size of the fibers decreases. Performance of this compound as cathode material in secondary electrolyte has been investigated using LiPF6 as electrolyte. A capacity of 140 mAh/g was obtained which remained fairly constant with up to at least 10 cycles. We also investigated electrochemical behavior of thermal products.

ChemInform Abstract: Sol-Gel Synthesis of Vanadium Oxide from Alkoxides.

ChemInform ◽  
2010 ◽  
Vol 22 (45) ◽  
pp. no-no
Author(s):  
M. NABAVI ◽  
C. SANCHEZ ◽  
J. LIVAGE
Keyword(s):  
Vanadium Oxide ◽  
Sol Gel ◽  
Sol Gel Synthesis

Vapor Diffusion Sol-Gel Synthesis of Fluorescent Perovskite Oxide Nanocrystals

2012 ◽  
Vol 24 (11) ◽  
pp. 1434-1438 ◽  
Author(s):  
Federico A. Rabuffetti ◽  
John S. Lee ◽  
Richard L. Brutchey
Keyword(s):  
Sol Gel ◽  
Perovskite Oxide ◽  
Vapor Diffusion ◽  
Sol Gel Synthesis

Sol–gel synthesis and controlled sintering of silver vanadium oxide

2007 ◽  
Vol 174 (2) ◽  
pp. 552-553 ◽  
Author(s):  
Esther S. Takeuchi ◽  
Amy C. Marschilok ◽  
Randolph A. Leising ◽  
Kenneth J. Takeuchi
Keyword(s):  
Vanadium Oxide ◽  
Sol Gel ◽  
Silver Vanadium Oxide ◽  
Sol Gel Synthesis

Modified Sol-Gel Synthesis of Vanadium Oxide Nanocomposites Containing Surfactant Ions, and Their Partial Removal

2000 ◽  
Vol 658 ◽  
Author(s):  
Arthur Dobley ◽  
Peter Y. Zavalij ◽  
Jürgen Schulte ◽  
M. Stanley
Keyword(s):  
Vanadium Oxide ◽  
Transition Metal Oxides ◽  
Sol Gel ◽  
Interlayer Spacing ◽  
Initial Compound ◽  
Structure Changes ◽  
Composition And Structure ◽  
Layered Transition Metal ◽  
Synthesis Composition ◽  
Sol Gel Synthesis

ABSTRACTRecently, there has been much interest in creating new layered transition metal oxides. Vanadium oxides may be used as sorbents, catalysts, and cathodes in lithium batteries. The modified sol-gel technique allows for some control towards the final structure of the compound. Using this technique, a new layered vanadium oxide phosphate material, containing the surfactant dodecylphosphate, has been synthesized. The compound was analyzed using powder XRD, TGA, SEM, FTIR, TEM, and solid state NMR for both 51V and 31P. V2O3(PO4C12H25)3Na2−xKx(H2O)3.2 is the general formula of the layered product with an interlayer spacing of 36.6 Å The initial compound is composed of a vanadium oxide phosphate layer sandwiched between two hydrocarbon layers. The synthesis, composition, and structure of the initial compound will be discussed. Interestingly, when this compound is calcined to 400°C, the structure changes and is possibly hexagonal. Preliminary results are presented on this calcined material.

Vanadium Oxide Nanofibers and Vanadium Oxide Polyaniline Nanocomposite: Preparation, Characterization and Electrochemical Behavior

2003 ◽  
Vol 788 ◽  
Author(s):  
Samuel T. Lutta ◽  
Hong Dong ◽  
Peter Y. Zavalij ◽  
M. Stanley Whittingham
Keyword(s):  
Vanadium Oxide ◽  
Hydrothermal Treatment ◽  
Electrochemical Behavior ◽  
Lithium Battery ◽  
Sol Gel ◽  
Active Material ◽  
Vanadium Oxides ◽  
Rechargeable Lithium Battery ◽  
Mixed Carbonate ◽  
Polyaniline Nanocomposite

ABSTRACTThe sol gel reaction of NH4VO3 and polymethylmethacrylate (PMMA) template followed by hydrothermal treatment formed (NH4)xV2O5-Δ.nH2O rods. TGA, SEM, XRD and FTIR characterized this compound. Heating (NH4)xV2O5-Δ.nH2O in oxygen and nitrogen at 250 °C and 300 °C respectively resulted in the formation of vanadium oxides nanofibers of V3O7 and V2O5. Performance of these compounds as cathode in rechargeable lithium battery was investigated in a LiPF6/mixed carbonate electrolyte. The materials show good cycling with capacity greater than 130mAh/g, which translates to the insertion of 0.5 moles of Li+ per vanadium of the active material.

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