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Previous works have been made on the improvement of selectivity of ion exchange membranes using adsorption of polyelectrolyte on the surface of the materials. The modification of the surface material in the case of an anion exchange membrane concerns the hydrophilic/hydrophobic balance properties and its relationship with the hydration state. Starting from this goal, the AMX membrane has been modified,...
In this paper, we synthesized rutile TiO2 nanorods by hydrolysis of TiCl4 ethanolic solution in water at 50 °C. Scanning electron microscopy and transmission electron microscopy images show that the as-prepared sample was consisted of nanoflowers of about 500 nm in sizes, and each petal of nanoflowers was assembled by several nanorods. We tested the electrochemical properties of the rutile TiO2 nanorods...
LiNi0.5Mn1.5O4 cathodes were synthesized by three different raw materials at high temperature. The samples were characterized by X-ray diffraction and scanning electron microscopy tests, respectively. The results indicate that the synthesized samples show pure spinel structure, and the samples synthesized by nickel–manganese hydrate and nickel–manganese oxide show regular geometrical shape. The electrochemical...
In the present work, the study is focused on the influence of the sulfonic (SO3Li) and methyl methalacrylate (MMA) functional groups on the lithium metal electrode–electrolyte interface. We attempt to improve the cyclic performance of lithium metal anode and to suppress the dendrite formation by introducing surface functional groups into the electrode–electrolyte interface. Here, this introduction...
Electron paramagnetic resonance (EPR), optical absorption, and infrared spectral studies have been carried out on Mn2+ ions doped in poly(vinyl alcohol) (PVA) complexed with polyethylene glycol (PEG) films prepared by solution cast technique. The EPR spectra of 0.25 mol% Mn2+ ions doped polymer complex (PVA+PEG) at room temperature exhibit sextet hyperfine structure (hfs), centered at g ≈ 1.99. The...
Microcrystalline LiNiPO4 powders have been prepared by solid-state reaction using various precursors. Characterization of the structure and morphology of powders was performed using XRD, SEM, HRTEM, Raman, and FTIR. The electronic properties of materials were investigated by SQUID and ESR. The LiNiPO4 material adopts the olivine-like structure (Pnma S.G.). Analysis of the Raman and FTIR spectra figures...
The power battery was manufactured with the commercial LiMn2O4 and graphite, and its storage performances with different charged state were studied. Structure, morphology, and surface-state change of the LiMn2O4 before and after storage were observed by XRD, SEM, XPS, CV, and AC technique, respectively. The electrochemical performances of LiMn2O4 battery were tested. The result shows that the capacity...
The electrochemical and electrocatalytic behavior of glassy carbon electrodes modified by one mono and four dihydroxy derivatives of anthra-9,10-quinone compounds have been investigated by cyclic voltammetric technique. The stability of the modified electrodes was ascertained in acidic and neutral media. The surface morphology of modified electrode was characterized by scanning electron microscope...
Olivine-type pristine LiMnPO4 and nickel-substituted LiNi0.05Mn0.95PO4 electrode materials were synthesized via a sol–gel route, and characterized by X-ray diffraction (XRD), transmission electron microscopy, and X-ray fluorescence analysis techniques. Their electrochemical properties in 2 M Li2SO4 aqueous solution were investigated by cyclic voltammetry, electrochemical impedance spectroscopy, and...
This paper introduces a carbon paste electrode modified with ferrocene and carbon nanotubes as a voltammetric sensor for determination of sulfite at pH 7.0. The results showed that under the optimum condition (pH 7.0) in cyclic voltammetry, the oxidation of sulfite occurred at a potential about 280 mV less positive than the unmodified carbon paste electrode. Kinetic parameters such as electron transfer...
Lithium stannate (Li2SnO3) has been prepared by solution evaporation method. The precursor obtained is sintered at 800°C for 5, 6, and 7 h, respectively. X-ray diffractogram confirmed that the sample obtained after sintering is Li2SnO3. The pelletized Li2SnO3 after heating at 500 °C for 3 h is used for electrochemical impedance spectroscopy characterization. Impedance measurements have been carried...
A carbon paste electrode modified with 5-amino-3′,4′-dimethoxy-biphenyl-2-ol and carbon nanotubes was used for the sensitive voltammetric determination of norepinephrine (NE). The electrochemical response characteristics of the modified electrode toward NE, acetaminophen (AC), and folic acid (FA) were investigated by cyclic and square wave voltammetry (SWV). The results show an efficient catalytic...
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