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Alkaline polymer electrolyte membrane with high ionic conductivity of 0.019 S cm−1 at room temperature was prepared from poly(vinyl alcohol) and acrylic acid through solution polymerization. The structure and morphology of the membrane were characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The electrochemical properties were measured by the alternating...
Poly(vinylidene fluoride) (PVDF)/sodium hydrogen carbonate (NaHCO3)-based microporous polymer membranes were prepared by salt leaching. In this study, lithium-trifluoromethane sulfonate (LiCF3SO3) was used by dissolving it in solvents like propylene carbonate (PC), dimethyl carbonate (DMC), and diethylene carbonate (DEC). Microporous polymer electrolytes (MPE) were obtained from their porous polymer...
Lead-carbon hybrid ultracapacitors comprise positive lead dioxide plates of the lead-acid battery and negative plates of carbon-based electrical double-layer capacitors (EDLCs). Accordingly, a lead-carbon hybrid ultracapacitor has the features of both the battery and that of an EDLC. In this study, the development and performance comparison between the two types of lead-carbon hybrid ultracapacitors,...
TiO2-reduced graphene oxide nanocomposite has been synthesized by a facile hydrothermal process. The structure and morphology have been characterized by X-ray diffraction and scanning electron microscopy. The result shows that a unique nanocomposite has been obtained with the TiO2 nanoparticle homogenously dispersed onto the reduced graphene oxide sheets. The electrochemistry performance has been...
Polymer electrolytes composed of poly(ethylene oxide) (PEO), lithium oxalate (LiOX), and borontrifluoride diethyl ether (BF3·OEt2) were prepared, and their ionic conductivities, lithium ion transference number, thermal properties, and infrared spectra were investigated. The polymer electrolyte for the PEO/LiOX in the absence of BF3·OEt2 showed the ionic conductivity of 10–6 S cm−1 at 130 °C. The addition...
LiMnPO4/LiMn2O4 (LMP/LMO) composite cathodes with LMP coating on the surface of LMO were synthesized by hydrothermal method at 180 °C for 10 h. The crystal structures and microstructures were characterized via power X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), and high-resolution transmission electron microscope (HRTEM). The electrochemical properties were characterized...
A novel carbon paste electrode (CPE) modified with 2,2′-[1,7–heptanediylbis(nitrilomethylidene)]-bis(4-hydroxyphenol) (DHB) and carbon nanotubes (CNTs) was prepared. At first, the redox properties of the modified electrode were studied by cyclic voltammetry (CV). Then, the modified electrode was used as an electrochemical sensor for oxidation of captopril (CAP). Under the optimum pH of 7.0, the overpotential...
II-NaFeP2O7 was prepared by conventional ceramic fabrication technique. Rietveld refinement, impedance properties, conductivity dispersion, electric modulus, and their scaling were carried out as a function of frequency and temperature. Thus, X-ray diffraction analysis indicates that the sample exhibits a single-phase nature with a monoclinic structure. In addition, analysis of Nyquist plots as well...
The present paper deals with the studies concerning electrochemical properties of the expanded graphite/iron oxide/carbon (EG/Fe2O3/C) composite produced by deep cathodic reduction. The electrochemical activity of EG/Fe2O3/C composite was investigated in alkaline solution by cyclic voltammetry technique. Electrochemical features of EG/Fe2O3/C were found to be strongly influenced by the conditions...
The inhibition ability of three newly synthesized piperidine sulphonamides toward the mild steel (MS) corrosion was investigated using mass loss and electrochemical techniques. The adsorption of all the piperidine sulphonamides on MS complies with the Langmuir isotherm model in all studied temperatures. Associated activation and adsorption thermodynamic parameters were computed and discussed. The...
The present study illustrates cadmium chloride (CdCl2)-doped hydroxypropyl methylcellulose (HPMC) polymer electrolyte films. Solution cast method is employed to prepare polymer electrolyte samples of HPMC complexed with various concentrations of CdCl2 (1–4 %, wt.%). Structural and thermal studies of these polymer samples were investigated using X-ray diffraction (XRD) and differential scanning calorimetry...
In this paper, we studied the VOPO4·2H2O as an electrode material for supercapacitors. A systematic comparison of VOPO4·2H2O prepared by reflux and hydrothermal methods was carried out through detailed analyses that included power X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). Their electrochemical...
A simple and sensitive electrochemical method was proposed for the quantitative determination of nonsteroidal anti-inflammatory drug diclofenac (DCF). For the first time, carboxyl-functionalized graphene oxide (GO-COOH)-modified glassy carbon electrode (GCE) was employed for the determination of DCF by cyclic voltammetry (CV) and linear sweep voltammetric (LSV) techniques. The proposed modified electrode...
Polyaniline thin films have been prepared by the simple and inexpensive successive ionic layer adsorption and reaction (SILAR) method at room temperature in the presence of three different surfactants (Triton X-100, polyethylene glycol, and sodium dodecyl sulfate) using ammonium peroxydisulfate (APS) as an oxidizing agent. The two-beaker SILAR system is adopted with aniline in 1 M H2SO4 solution as...
In this work, dipicolinic acid and quinolinic acid are employed as additives to improve the thermal stability and electrochemical performance for the positive electrolyte of vanadium redox flow battery (VRFB). Both additives can restrain the precipitation of V2O5 from V(V) electrolyte. The concentration of remained V(V) ions in electrolyte with 1 mol% quinolinic acid is 1.58 M at 40 °C after 90 h,...
Straightforward syntheses of selected non-deuterated, partially deuterated, and fully deuterated room temperature ionic liquids (ILs) with the anions tris(pentafluoroethyl)trifluorophosphate, tetracyanoborate, and methyl sulfate were developed. The viscosity and the density of these ionic liquids were measured at various temperatures. The dissociation rate of the ionic liquid, the sizes of the cation...
The frequency dispersion of impedance, relaxation, and modulus formalism under oxygen, air, and nitrogen atmospheres are performed on La2Mo2−xWxO9 (x = 0, 0.3, 0.5, 0.7) phases from 800 °C to room temperature. Thermal analyses on a dilatometer demonstrate the stabilization of the high-temperature cubic phase when the W content is increased. The whole frequency-dependent...
Investigation on iodine-iodide redox system was carried out using cyclic voltammetry at graphite electrode in aqueous HIx solution at different concentrations of iodine and HI. Prominent oxidation and reduction reactions were identified using semi-quantitative relation between electroactive species concentration, and post-peak diffusion limited current was employed. Formation of iodate at higher positive...
Controlled growth of flower-like SnS2 hierarchical structures was obtained by a facile hydrothermal method with the mixture solution of SnCl4 and L-cysteine (L-cys). The results of electron microscopy and X-ray diffraction characterization indicated that morphology, structure, and crystallinity of the hierarchical structures were seriously dependent on the concentration of L-cys, mole ratio of Sn4+...
A series of Ni/ZrO2–SO42− and Ni/ZrO2–Al2O3–SO42− catalysts were prepared in one step by the sol–gel method and dried in hypercritical conditions of the solvent. The characteristic properties of those solids were investigated using many techniques: the XRD, the physisorption of N2, the IR, the UV–visible, and the X-ray photoelectron spectroscopy (XPS). Textural analysis reveals the mesoporosity...
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