Synthesis and Electrochemical Properties of V2O5 Nanostructures

2007 ◽  
Vol 336-338 ◽  
pp. 2134-2137 ◽  
Author(s):  
Ying Wang ◽  
Guo Zhong Cao
Keyword(s):  
Electrochemical Properties ◽  
Vanadium Pentoxide ◽  
Discharge Rate ◽  
High Surface ◽  
High Surface Area ◽  
Plain Film ◽  
Solution Synthesis ◽  
Diffusion Distance ◽  
Short Diffusion Distance ◽  
Charge Discharge

In this seminar, I will present our recent work on the growth and electrochemical properties of single crystalline vanadium pentoxide (V2O5) nanorod and Ni-V2O5·nH2O nanocable arrays. These nanostructures were prepared by solution synthesis and template-based electrodeposition. Processing, morphology, structure and electrochemical properties of these nanostructures will be discussed. These nanostructured electrodes of vanadium pentoxide demonstrate significantly enhanced intercalation capcity and charge/discharge rate compared to the plain film electrodes, due to the high surface area and short diffusion distance offered by nanostructure.

Effect of Carbon Pososity on the Electrochemical Properties of Carbon/Polyaniline Supercapacitor Electrodes

2013 ◽  
Vol 16 (3) ◽  
pp. 189-195
Author(s):  
M. A. Torre ◽  
C. Del Río ◽  
E. Morales
Keyword(s):  
Electrochemical Properties ◽  
In Situ Polymerization ◽  
Activated Carbons ◽  
Discharge Rate ◽  
High Surface ◽  
Polymer Concentration ◽  
High Surface Area ◽  
Carbon Surface ◽  
Aniline Monomer ◽  
Acid Media

Supercapacitors have attracted great attention in power source applications, due to their high power density, elevated charge/discharge rate, good reversibility and long life. Activated carbons are the most frequently used electrode material, due to their high accessibility, non-toxicity, high chemical stability, good electrical conductivity, high surface area and low cost, but in practice the capacitance values are limited by the material microstructure. In this work we report on the synthesis and electrochemical characterization of carbon/polyaniline composites, synthesized by in-situ polymerization in acid media of aniline monomer on the surface of two activated carbons having different textural properties, and on the effect of the carbon porosity on the electrochemical properties of the electrodes. Results obtained indicate that the BET specific surface of the composites decreases sharply due to the collapse of the porous structure (mainly the micropores) of the carbon by the polyaniline chains. Regarding capacitance values, Csp increases on increasing polyaniline loading in the composite, however high polymer concentration lead to a decrease on capacitance when high current were applied, probably due to diffusion restrictions of the electrolyte anions and cations to the carbon surface.

Green Energy Anode Materials: Pyrolytic Carbons Derived from Peanut Shells for Lithium Ion Batteries

2011 ◽  
Vol 415-417 ◽  
pp. 1572-1585 ◽  
Author(s):  
George Ting Kuo Fey ◽  
Yu Yen Lin ◽  
Kai Pin Huang ◽  
Yi Chuan Lin ◽  
T. Prem Kumar ◽  
...  
Keyword(s):  
Film Formation ◽  
Discharge Rate ◽  
High Surface ◽  
High Surface Area ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Green Energy ◽  
Peanut Shells ◽  
Treated Carbon ◽  
Charge Discharge

Disordered carbons prepared by the pyrolysis of peanut shells with and without a porogen were investigated. The first-cycle lithium insertion capacity of the porogen-treated carbon was 3504 mAh/g, and was related to the high surface area (2099 m2/g) of the carbon. It was concluded from x-ray diffraction studies that the extra lithium was stored in the microporous voids in the carbon. The large irreversible capacity for this carbon is believed to be associated with the loss of lithium through its reaction with surface groups as well as with lithium plating and subsequent passive film formation. The impedance profiles of the carbons at various potentials were analyzed and modeled with suitable equivalent circuits. Charge-discharge studies with the porogen-treated carbon, pre-charged and discharged prior to use in coin cells, indicated that the first-cycle reversible capacity was the greatest when the charge-discharge rate was 0.4 C. The carbon maintained capacities of about 325 mAh/g for 20 cycles, and then stabilized around 380 mAh/g for over 70 cycles.

scholarly journals Electrochemical Sensor Based on Prussian Blue Electrochemically Deposited at ZrO2 Doped Carbon Nanotubes Glassy Carbon Modified Electrode

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1328 ◽  
Author(s):  
Marlon Danny Jerez-Masaquiza ◽  
Lenys Fernández ◽  
Gema González ◽  
Marjorie Montero-Jiménez ◽  
Patricio J. Espinoza-Montero
Keyword(s):  
Carbon Nanotubes ◽  
Electrochemical Properties ◽  
Electrochemical Sensor ◽  
Prussian Blue ◽  
Surface Area ◽  
Glassy Carbon ◽  
High Surface ◽  
High Surface Area ◽  
Electrochemically Deposited ◽  
Area X

In this work, a new hydrogen peroxide (H2O2) electrochemical sensor was fabricated. Prussian blue (PB) was electrodeposited on a glassy carbon (GC) electrode modified with zirconia doped functionalized carbon nanotubes (ZrO2-fCNTs), (PB/ZrO2-fCNTs/GC). The morphology and structure of the nanostructured system were characterized by scanning and transmission electron microscopy (TEM), atomic force microscopy (AFM), specific surface area, X-ray diffraction (XRD), thermogravimetric analysis (TGA), Raman and Fourier transform infrared (FTIR) spectroscopy. The electrochemical properties were studied by cyclic voltammetry (CV) and chronoamperometry (CA). Zirconia nanocrystallites (6.6 ± 1.8 nm) with cubic crystal structure were directly synthesized on the fCNTs walls, obtaining a well dispersed distribution with a high surface area. The experimental results indicate that the ZrO2-fCNTs nanostructured system exhibits good electrochemical properties and could be tunable by enhancing the modification conditions and method of synthesis. The fabricated sensor could be used to efficiently detect H2O2, presenting a good linear relationship between the H2O2 concentration and the peak current, with quantification limit (LQ) of the 10.91 μmol·L−1 and detection limit (LD) of 3.5913 μmol·L−1.

Synthesis and Electrochemical Properties of Ternary Co-, Cu- and Ni- Based Metal-Organic Frameworks Electrode for Battery Supercapacitor Hybrid Application

2020 ◽  
Vol 981 ◽  
pp. 17-22
Author(s):  
Amir Luqman Sanusi ◽  
Nurul Khairiyyah Mohd Zain ◽  
Izan Izwan Misnon ◽  
Ahmad Salihin Samsudin ◽  
Rajan Jose
Keyword(s):  
Electrochemical Properties ◽  
Metal Ion ◽  
Electrochemical Impedance ◽  
High Surface ◽  
Metal Organic Frameworks ◽  
High Surface Area ◽  
High Specific Capacitance ◽  
Electrochemical Analysis ◽  
Benzenedicarboxylic Acid ◽  
Metal Organic

Metal-organic frameworks (MOFs) composed by coordination bonds between metal ion with organic linker has a uniform combination of micro and mesoporous structures has been used for several application including battery supercapacitor hybrid. (BSH). In BSH, MOF offer several advantages including high surface area, porous, and structure tunability. This paper reports the synthesis of ternary MOF of copper (Cu), nickel (Ni) and cobalt (Co) with 1,4-benzenedicarboxylic acid. The Co/Cu/Ni-MOF is synthesized using hydrothermal method at 160 °C for 12h and further develop as a BSH electrode. The physicochemical properties of MOF were characterized using FESEM, FTIR, XRD, BET and the electrochemical properties were evaluated using cyclic voltammetry (CV), charge-discharge cycling (CDC) and electrochemical impedance spectroscopy (EIS). Electrochemical analysis indicated that the MOF has high specific capacitance (CS) of 591 F g-1 at a current density of 1 A g-1 and 519 F g-1 at scan rate of 2 mV s-1, and possess low series resistance (RS) of 0.44 Ω and equivalent distributed resistance (Rd) of 1.07 Ω.

Effect of Synthesis Parameters on the Electrochemical Properties of High-Surface-Area Mesoporous Titanium Oxide with Polypyrrole Nanowires in the Pores

2014 ◽  
Vol 1 (12) ◽  
pp. 2153-2162 ◽  
Author(s):  
Luke A. C. Smith ◽  
Frederick Romer ◽  
Michel L. Trudeau ◽  
Mark E. Smith ◽  
John V. Hanna ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Surface Area ◽  
Titanium Oxide ◽  
High Surface ◽  
High Surface Area ◽  
Polypyrrole Nanowires ◽  
Synthesis Parameters

SYNTHESIS AND CHARGE–DISCHARGE PROPERTIES OF POROUS CO3O4 NANOROD BUNDLE ELECTRODE

NANO ◽  
2012 ◽  
Vol 07 (05) ◽  
pp. 1250036 ◽  
Author(s):  
FEI TENG ◽  
JUN WANG ◽  
MINDONG CHEN ◽  
DENNIS DESHENG MNEG
Keyword(s):  
Electron Microscopy ◽  
High Surface ◽  
High Surface Area ◽  
Lithium Ion ◽  
Nitrogen Adsorption ◽  
X Ray ◽  
Transmission Electron ◽  
Rate Capacity ◽  
Nanorod Bundle ◽  
Charge Discharge

The Co3O4 nanorod bundles are synthesized by a hydrothermal method. The samples are characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), electron diffraction (ED), X-ray powder diffractometer (XRD), and nitrogen adsorption. It is important that the as-obtained Co3O4 nanorod bundles are assembled by nanoparticles. The porous nanorod bundle electrode exhibits a higher rate capacity and a higher reverse capability for lithium ion battery than the solid nanorods, which is attributed to the high surface area and the porous structure.

MorphÒlogy and Properties of Vanadium Oxide Xerogels and Aerogels

1994 ◽  
Vol 369 ◽  
Author(s):  
B. Katz ◽  
W. Liu ◽  
K. Salloux ◽  
F. Chaput ◽  
B. Dunn ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Oxides ◽  
Vanadium Pentoxide ◽  
Transition Metal Oxides ◽  
Lithium Batteries ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Secondary Lithium Batteries ◽  
Gel Processing

AbstractThe high redox potential and ion insertion properties of vanadium pentoxide have made this material a viable cathode for secondary lithium batteries. The use of sol-gel methods to synthesize vanadium pentoxide and other transition metal oxides has been well studied as the technique represents a relatively simple approach for preparing thin films and powders. Although it is well known that sol-gel processing may be used to prepare high surface area aerogels, the research on transition metal oxides has been largely limited to xerogels. The present paper compares the properties, structures and morphologies of vanadate xerogels and aerogels.

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