Cyclic voltammetry for reversible anodic dissolution of the electrode material inhibited by a redox adsorption process

1976 ◽  
Vol 67 (1) ◽  
pp. 123-128 ◽  
Author(s):  
Sergio Casadio
Keyword(s):  
Cyclic Voltammetry ◽  
Anodic Dissolution ◽  
Electrode Material ◽  
Adsorption Process

Preparation and Electrochemical Properties of LaMnO3 Powder as a Supercapacitor Electrode Material

2017 ◽  
Vol 727 ◽  
pp. 698-704 ◽  
Author(s):  
Xian Wei Wang ◽  
Xiao Er Wang ◽  
Hui Chao Zhang ◽  
Qian Qian Zhu ◽  
Dong Li Zheng ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Properties ◽  
Electrode Material ◽  
Raw Materials ◽  
Sol Gel ◽  
Galvanostatic Charge ◽  
Supercapacitor Electrode ◽  
Lanthanum Manganate ◽  
Pure Phase ◽  
Charge Discharge

The structural and electrochemical properties of lanthanum manganate (LaMnO3) powder prepared by the sol-gel method are researched in this article. The powder calcined at 600 °C showed amorphous, and the powder calcined at 700-800 °C showed the pure phase of the LaMnO3. The grains with the size of about 80-120 nm were agglomerating together. Cyclic voltammetry and galvanostatic charge-discharge were used to characterize the electrochemical properties in alkaline environment. The electrochemical properties calcined at 700 °C showed a specific capacitance of 73 F/g at the current density of 0.5 A/g. The raw materials for preparing the LaMnO3 powder are cheap, and the operation method is simple.

Self-Assembly of α-MnO2 Nanorods into Spheres: Synthesis and Electrochemical Properties

2008 ◽  
Vol 8 (3) ◽  
pp. 1494-1496 ◽  
Author(s):  
Xu Chun Song ◽  
Yi Fan Zheng ◽  
E. Yang ◽  
Yun Wang
Keyword(s):  
Cyclic Voltammetry ◽  
Sodium Dodecyl Sulfate ◽  
Electrochemical Properties ◽  
Electrode Material ◽  
Self Assembly ◽  
Sodium Dodecyl ◽  
Electrochemical Characterization ◽  
Dodecyl Sulfate ◽  
Hydrothermal Approach

The α-MnO2 spherical assemblies were prepared via a facile hydrothermal approach in the presence of sodium dodecyl sulfate (SDS). The assembled nanostructures were composed of the MnO2 nanorods with 150–200 nm in width and several micrometers in length. The products were characterized by SEM, TEM and XRD. The electrochemical characterization was carried out by cyclic voltammetry, which indicated that the α-MnO2 spherical assemblies were of an excellent electrode material for supercapacitor.

Synthesis and Characterization of Complex from K4[Co(SCN)6], Zinc(II) Chloride and Quinoline as Electrode Material of K-Ion Battery

2020 ◽  
Vol 851 ◽  
pp. 3-8
Author(s):  
Ade Rifaldi ◽  
Fariati ◽  
Husni Wahyu Wijaya ◽  
Wiwin Dwi Jayanti ◽  
Stephane Golhen ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Prussian Blue ◽  
Electrode Material ◽  
Reduction Potential ◽  
Synthesis And Characterization ◽  
Direct Reaction ◽  
Reaction Method ◽  
Ft Ir

Prussian Blue Like (PBL) compounds that are potentially used as K-Ion Battery (KIB) electrodes have been synthesized from zinc(II) chloride and quinoline (Qn) precursors combining melting and direct reaction method. The formed K2[Zn(Qn)2][Co(SCN)6] compounds melt in range 179-181°C with conductivity value reaches 468 μS/cm. Thiocyanate and quinoline ligands were characterized using FT-IR and UV-Vis spectrometry. The cyclic voltammetry of the formed compounds showed the reduction potential up to -0.34 V (versus AgCl/Ag).

Study on Electrochemical Stripping Method of Graphene Electrode and Its Capacitive Properties

2021 ◽  
Vol 13 (4) ◽  
pp. 608-614
Author(s):  
Qi Qin ◽  
Yi-Ran Cui ◽  
Meng Song ◽  
Ji-Yuan Li ◽  
Yan-Jie Wang ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Specific Surface ◽  
Electrode Material ◽  
Cyclic Voltammetry Curve ◽  
Voltage Range ◽  
Graphene Electrode ◽  
Capacitive Properties ◽  
Stripping Method ◽  
Constant Potential ◽  
Electrochemical Stripping

Graphene has excellent properties, such as excellent conductivity, more pores, stable chemical and structural properties, high specific surface area, so it is usually used in the battery fields. In order to further explore the capacitive properties of graphene, this experiment used electrochemical stripping method, the electrochemical electrode was characterized by constant potential treatment methods, cyclic voltammetry curve, and constant current charging–discharging curve. The capacitive performance of modified graphene at different potentials was compared. If a constant potential peeling treatment is performed, the interlayer spacing of graphene increases, and this time, the specific surface area is enlarged, and the electrical properties of the graphene electrode material are correspondingly improved. Cyclic voltammetry curve results show that the graphene electrode exhibits better capacitance performance after being treated with a constant potential in neutral electrolyte. When treating with 3.1 V constant potential and voltage range of -1.1 V–1.1 V, capacitance can reach 327.273 F. The chronopotentiometry curve results show that 3.1 V graphene electrode mass ratio capacitance can reach 218.182 F/g under voltage range of -0.3 V–0.3 V, meeting the energy storage requirements of the battery industry, and it is expected to become an ideal electrode material in the field of supercapacitors.

Graphene Oxide Nanoplate-MnO2 Composites for Supercapacitors

2012 ◽  
Vol 512-515 ◽  
pp. 944-947 ◽  
Author(s):  
Jia Wei Deng ◽  
Huan Pang ◽  
Shao Mei Wang ◽  
Jiang Shan Zhang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Cyclic Voltammetry ◽  
Graphene Oxide ◽  
Ambient Temperature ◽  
Electrochemical Properties ◽  
Electrode Material ◽  
Supercapacitor Electrode ◽  
Scanning Electron

Graphene oxide nanoplate-MnO2composites have been synthesized by oxidizing part of the carbon atoms in the framework of graphene oxide nanoplates at ambient temperature. The composites were characterized by scanning electron microscopy (SEM) and cyclic voltammetry (CV). Their microstructures and morphologies have affected their electrochemical properties. Compared with MnO2nanoparticles, the nanocomposite prepared reveals better electrochemical properties as a supercapacitor electrode material.

Voltammetric and Chronopotentiometric Study of Nonstationary Processes at the Oxygen-Evolving Anodes in KF–NaF–AlF3–Al2O3 Melt

2016 ◽  
Vol 844 ◽  
pp. 19-26
Author(s):  
Andrey Suzdaltsev ◽  
Andrey Khramov ◽  
Vadim Anatolyevich Kovrov ◽  
Oksana Limanovskaya ◽  
Valentin Nekrasov ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Electrode Material ◽  
Nonstationary Processes ◽  
Melt Temperature ◽  
Ni Alloy ◽  
Oxidation Stage ◽  
Oxygen Evolving

Abstract. Some features of behavior and kinetic of the anodic processes for the platinum and Cu–Fe–Ni alloy in the KF–NaF–AlF3–Al2O3 melts at 1025–1055 K have been studied by cyclic voltammetry and chronopotentiometry.The obtained results allowed us to conclude that mechanisms of the anodic processes at the platinum and Cu–Fe–Ni alloy are similar. Both mechanisms include the oxidation stage of electrode material. A rate of this stage is determined to depend significantly on the melt temperature.

scholarly journals Passivation and red-ox processes of refractory metals in carbamide-chloride melt

2003 ◽  
Vol 39 (1-2) ◽  
pp. 69-79 ◽  
Author(s):  
N. Tumanova ◽  
S. Volkov ◽  
S. Kochetova ◽  
T. Triphonova ◽  
N. Buryak
Keyword(s):  
Cyclic Voltammetry ◽  
Low Temperature ◽  
Metal Surface ◽  
Anodic Dissolution ◽  
Electrochemical Behavior ◽  
Refractory Metals ◽  
Spectroscopic Methods ◽  
Complex Ions ◽  
Chloride Melt ◽  
Composition Of Complexes

The electrochemical behavior of refractory metals (Pt, Pd, W, Ti, Nb, Ta) in the low temperature carbamide-NH4Cl melt (texp=120 oC) and the structure of complex ions formed after anodic dissolution have been studied by cyclic voltammetry and spectroscopic methods. The features of the mechanism of metal electrodissolution and possibilities of the cathodic reduction of complexes formed in the melt are presented. A possible correlation between passivation processes on the metal surface, the mechanism of electrodissolution, composition of complexes and the electrochemical activity of metals and their ions are discussed. The data obtained reflect the possibilities to use the carbamide-NH4Cl melt for practical purposes in electroplating and electropolishing.

scholarly journals Electrochemical Studies of Lead Telluride Behavior in Acidic Nitrate Solutions

2015 ◽  
Vol 60 (1) ◽  
pp. 95-100
Author(s):  
E. Rudnik ◽  
P. Biskup
Keyword(s):  
Cyclic Voltammetry ◽  
Nitric Acid ◽  
Anodic Dissolution ◽  
Lead Telluride ◽  
Electrochemical Studies ◽  
Acid Solutions ◽  
Nitric Acid Solutions ◽  
Stationary Electrode ◽  
Acidic Electrolyte ◽  
Nitrate Solutions

Abstract Electrochemistry of lead telluride stationary electrode was studied in nitric acid solutions of pH 1.5-3.0. E-pH diagram for Pb-Te-H2O system was calculated. Results of cyclic voltammetry of Pb, Te and PbTe were discussed in correlation with thermodynamic predictions. Anodic dissolution of PbTe electrode at potential approx. -100÷50 mV (SCE) resulted in tellurium formation, while above 300 mV TeO2 was mainly produced. The latter could dissolve to HTeO+2 under acidic electrolyte, but it was inhibited by increased pH of the bath.

The Use of Deep Eutectic Solvents Ionic Liquids for Selective Dissolution and Recovery of Sn, Pb and Zn from Electric and Electronic Waste (WEEE)

2017 ◽  
Vol 68 (9) ◽  
pp. 1963-1968
Author(s):  
Ana Maria Popescu ◽  
Cristina Donath ◽  
Elena Ionela Neacsu ◽  
Vasile Soare ◽  
Ionut Constantin ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Anodic Dissolution ◽  
Electronic Waste ◽  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Selective Dissolution ◽  
Cathodic Deposition ◽  
Structure And Morphology

The recovery of metals from a multi-component alloy obtained by crushing, melting and anodic dissolution of waste electric and electronic equipment (WEEE) has been investigated. The aim of this paper is to selective recover of Sn, Pb and Zn by a novel ecological technology using ionic liquids. Metallic Sn, Pn and Zn were electrochemically recovered from the WEEE dissolved in choline chloride-ethylene glycol-iodine ionic liquid. Cyclic voltammetry was used in order to determine the deposition potentials of the studied metals. XRD and SEM/EDX analysis methods were used to characterize the structure and morphology of the metallic deposits. Evolution of the cathodic deposition and of the chemical composition of the anode during the anodic dissolution process for Sn, Pb and Zn was also studied. This study has demonstrated the possibility of selective recovery of Sn, Pb and Zn from the multi-component alloy (which resulted from consecutive anodic dissolution of WEEE) by anodic dissolution/deposition in ionic liquids.

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