Synthesis and characterization of vanadium oxide aerogels

Chaput, Frédéric; Dunn, Bruce; Fuqua, Peter D.; Salloux, K.

doi:10.1016/0022-3093(95)00026-7

Cited by 101 publications

(80 citation statements)

References 11 publications

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“…72 For example, V 2 O 5 aerogels are high-surface area oxide materials made via supercritical drying of a V 2 O 5 gel. 73,74 Their short-range structure is similar to that of V 2 O 5 xerogels, 75 which consists of V 2 O 5 bilayers separated from each other by a large interlayer spacing (;11.5 Å) filled with water molecules. In the case of the aerogels, the nominal formula after supercritical drying is V 2 O 5 Á2H 2 O and ;1.5 H 2 O molecules are removed by heat treatment at 120°C.…”

Section: A Structural Watermentioning

confidence: 92%

Tuning the interlayer of transition metal oxides for electrochemical energy storage

Augustyn

2016

J. Mater. Res.

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Layered transition metal oxides are some of the most important materials for high energy and power density electrochemical energy storage, such as batteries and electrochemical capacitors. These oxides can efficiently store charge via intercalation of ions into the interlayer vacant sites of the bulk material. The interlayer can be tuned to modify the electrochemical environment of the intercalating species to allow improved interfacial charge transfer and/or solid-state diffusion. The ability to fine-tune the solid-state environment for energy storage is highly beneficial for the design of layered oxides for specific mechanisms, including multivalent ion intercalation. This review focuses on the benefits as well as the methods for interlayer modification of layered oxides, which include the presence of structural water, solvent cointercalation and exchange, cation exchange, polymers, and small molecules, exfoliation, and exfoliated heterostructures. These methods are an important design tool for further development of layered oxides for electrochemical energy storage applications.

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Section: A Structural Watermentioning

confidence: 92%

Tuning the interlayer of transition metal oxides for electrochemical energy storage

Augustyn

2016

J. Mater. Res.

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“…The conductivity of aerogel disks (1 cm dia. and 1 cm thick) was measured by two point complex impedance (20 Hz -1 MHz) from 150 °C to 25 °C in flowing argon as described previously [10]. The conductivity of pressed pellets was determined using a commercial four-point probe ( (i.e.…”

Section: Characterization Methodsmentioning

confidence: 99%

“…Acetone is a logical cosolvent candidate because of its use in the gelation of vanadyl alkoxides [9][10][11]. However, acetone is not the best choice of solvent from which to polymerize conductive PPy.…”

Section: Cosynthesis Gelsmentioning

confidence: 99%

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Design and synthesis of inorganic–organic hybrid microstructures

Harreld

Dunn

Nazar

1999

International Journal of Inorganic Materials

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“…For both methods, an alkoxide precursor, vanadyl triisopropoxide was hydrolyzed in a water -acetone mixture. Details for preparing scd and ambigels of vanadium oxide were reported previously [5,6]. The latter approach involved drying the precursor gel using various non-polar solvents such as cyclohexane, heptane, pentane and hexane.…”

Section: Materials Synthesismentioning

confidence: 99%

Electrochemical properties of vanadium oxide aerogels

Dong

Sakamoto

Dunn

2003

Science and Technology of Advanced Materials

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Aerogels are well-known mesoporous materials whose low density and high surface area result from synthesis methods that enable the pore solvent to be removed without collapsing the solid network phase. The interconnected porosity provides both molecular accessibility and rapid mass transport via diffusion, and for these reasons transition metal oxide aerogels are gaining increased interest as intercalation electrode materials for lithium-ion batteries. The present paper reviews recent research on vanadium oxide aerogels that has been directed at establishing both their fundamental properties and unique ways of incorporating these materials into electrode structures. The experiments used to determine the fundamental electrochemical properties of vanadium oxide aerogels involve the use of a sticky-carbon electrode that is designed to both hold the material and serve as the current collector. The results show that these materials combine elements of both capacitor and battery behavior as the materials possess both high specific capacitance (.2000 F/g) and high capacity for lithium incorporation (.450 mAh/g). The unique morphology of the vanadium oxide aerogel has led us to consider alternate electrode structures because traditional methods may compromise the mesoporous, high surface area morphology. One approach has involved the incorporation of single wall carbon nanotubes as the electronically conducting network. The resulting nanocomposites effectively retain the aerogel morphology and exhibit excellent electrochemical properties. These electrodes are especially effective at high discharge rates. Another approach has involved the preparation of aerogel electrodes that possess an inverted opal structure. The fabrication route is based on combining the templating of polystyrene spheres with sol-gel synthesis and leads to materials that possess a hierarchical pore structure. This architecture is also effective at retaining high lithium capacity at high current densities. q

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Synthesis and characterization of vanadium oxide aerogels

Cited by 101 publications

References 11 publications

Tuning the interlayer of transition metal oxides for electrochemical energy storage

Tuning the interlayer of transition metal oxides for electrochemical energy storage

Design and synthesis of inorganic–organic hybrid microstructures

Electrochemical properties of vanadium oxide aerogels

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