Amorphous V2O5/carbon composites as electrochemical supercapacitor electrodes

Kudo, Tetsuichi; Ikeda, Yōnosuke; Watanabe, Takayuki; Hibino, Mitsuhiro; Miyayama, Masaru; Abe, Hikaru; Kajita, Kentaro

doi:10.1016/s0167-2738(02)00383-1

Cited by 169 publications

(106 citation statements)

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“…4 The coulombic capacities were calculated from the surfaces of the cathodic and anodic parts of the cyclovoltammograms. In the Li-salt solution, the pure xerogel V 2 O 5 , with the coulombic capacity of 50 mA h g −1 , offered no any advantage in relation to crystalline V 2 O 5 which, according to our previous study [21] [17], which was achieved during the evaporation of V 2 O 5 solution in the presence of carbon black.…”

Section: Electrochemical Propertiesmentioning

confidence: 89%

“…By an analogous procedure enlarged by addition of acetylene black, composite V 2 O 5 /C can be synthesised. There exist the literature data that in organic electrolyte solutions, both lithium and manganese ions may be reversibly intercalated into V 2 O 5 /C composite at an acceptably high rate [11,16,17]. However, similar examinations in aqueous solutions were not published thus far.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Behaviour of V₂O₅Xerogel and V₂O₅Xerogel/C Composite in an Aqueous LiNO₃and Mg(NO₃)₂Solutions

et al. 2010

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We synthesized both the V 2 O 5 xerogel and the composite V 2 O 5 xerogel/C starting from the solution of V 2 O 5 in hydrogen peroxide. After the characterization by XRD, thermal (TGA-DTA), SEM methods and by particle size analysis, the investigation of Li + and Mg 2+ intercalation/deintercalation reactions in an aqueous solutions of LiNO 3 and Mg(NO 3 ) 2 were performed by cyclic voltammetry. The composite material V 2 O 5 xerogel/C displayed relatively high intercalation capacity, amounting to 123 mA h g −1 and 107 mA h g −1 , in lithium and magnesium salt solutions, respectively.

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Section: Electrochemical Propertiesmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Electrochemical Behaviour of V₂O₅Xerogel and V₂O₅Xerogel/C Composite in an Aqueous LiNO₃and Mg(NO₃)₂Solutions

et al. 2010

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“…1 Redox processes often occur in metal oxides, 1,4,[13][14][15][16][17][18][19][20][21][22] conducting polymers 1,4,[23][24][25] and hybrid organic-inorganic nanocomposite materials 26 making them attractive electrode materials for pseudocapacitors.…”

mentioning

confidence: 99%

Hydrogel-polymer electrolytes for electrochemical capacitors: an overview

Choudhury

Sampath

Shukla

2009

Energy Environ. Sci.

379

260

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Electrochemical capacitors are electrochemical devices with fast and highly reversible charge-storage and discharge capabilities. The devices are attractive for energy storage particularly in applications involving high-power requirements. Electrochemical capacitors employ two electrodes and an aqueous or a non-aqueous electrolyte, either in liquid or solid form; the latter provides the advantages of compactness, reliability, freedom from leakage of any liquid component and a large operating potential-window. One of the classes of solid electrolytes used in capacitors is polymer-based and they generally consist of dry solid-polymer electrolytes or gel-polymer electrolyte or composite-polymer electrolytes. Dry solid-polymer electrolytes suffer from poor ionic-conductivity values, between 10 À8 and 10 À7 S cm À1 under ambient conditions, but are safer than gel-polymer electrolytes that exhibit high conductivity of ca. 10 À3 S cm À1 under ambient conditions. The aforesaid polymer-based electrolytes have the advantages of a wide potential window of ca. 4 V and hence can provide high energy-density. Gel-polymer electrolytes are generally prepared using organic solvents that are environmentally malignant. Hence, replacement of organic solvents with water in gel-polymer electrolytes is desirable which also minimizes the device cost substantially. The water containing gel-polymer electrolytes, called hydrogel-polymer electrolytes, are, however, limited by a low operating potential-window of only about 1.23 V. This article reviews salient features of electrochemical capacitors employing hydrogel-polymer electrolytes.

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“…Unfortunately, its high cost has hindered the development of RuO2 as commercial acceptable electrodes for faradaic PCs [54][55]. Vanadium pentoxide (V2O5) has been used as an electrode material for ECs [56][57] because of its layered structure, high capacity, and ease of preparation. V2O5/carbon composites can improve the electrode performance when a small amount of V2O5 is dispersed uniformly on conducting and porous carbonaceous materials with very-high surface areas while keeping a high amount of heteroatom [58][59][60][61][62].…”

Section: V2o5/cnfcsmentioning

confidence: 99%

Electrospun Metal Oxide/Carbon Nanofiber Composite Electrode for Supercapacitor Application

Yang¹,

Kim

2015

Applied Chemistry for Engineering

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The hybridization of carbon nano-materials enhances the efficiency of each function of the resulting structure or composites. Also, the addition of non-carbon elements to nanomaterials modifies the electrochemical properties. Electrodes combining porous carbon nanofibers (CNFs) and metal oxides benefit from the combination of the double-layer capacitance of the CNFs and the pseudocapacitive character associated with the surface redox-type reactions. Consequently, they demonstrate superior supercapacitor performance in terms of high capacitance, high energy/power efficiency and high rate capability. This paper presents a comprehensive review of the latest advances made in the development and application of various metal oxide/CNF composites (CNFCs) to supercapacitor electrodes.

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Amorphous V2O5/carbon composites as electrochemical supercapacitor electrodes

Cited by 169 publications

References 4 publications

Electrochemical Behaviour of V₂O₅Xerogel and V₂O₅Xerogel/C Composite in an Aqueous LiNO₃and Mg(NO₃)₂Solutions

Electrochemical Behaviour of V₂O₅Xerogel and V₂O₅Xerogel/C Composite in an Aqueous LiNO₃and Mg(NO₃)₂Solutions

Hydrogel-polymer electrolytes for electrochemical capacitors: an overview

Electrospun Metal Oxide/Carbon Nanofiber Composite Electrode for Supercapacitor Application

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Amorphous V2O5/carbon composites as electrochemical supercapacitor electrodes

Cited by 169 publications

References 4 publications

Electrochemical Behaviour of V2O5Xerogel and V2O5Xerogel/C Composite in an Aqueous LiNO3and Mg(NO3)2Solutions

Electrochemical Behaviour of V2O5Xerogel and V2O5Xerogel/C Composite in an Aqueous LiNO3and Mg(NO3)2Solutions

Hydrogel-polymer electrolytes for electrochemical capacitors: an overview

Electrospun Metal Oxide/Carbon Nanofiber Composite Electrode for Supercapacitor Application

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Product

Resources

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Electrochemical Behaviour of V₂O₅Xerogel and V₂O₅Xerogel/C Composite in an Aqueous LiNO₃and Mg(NO₃)₂Solutions

Electrochemical Behaviour of V₂O₅Xerogel and V₂O₅Xerogel/C Composite in an Aqueous LiNO₃and Mg(NO₃)₂Solutions