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With the aim to develop high-performance sulfur electrode, manganese sulfide (MnS) was combined with sulfur/porous carbon composite electrode by a simple precipitation method. Both X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) results show that as-prepared MnS corresponds to Rambergite phase with a hexagonal structure (γ-MnS). MnS could be uniformly dispersed in the carbon...
Solid polymer polyethylene glycol (PEG)-based electrolytes composed with zinc acetate Zn(CH3COO)2 have been prepared by using solution blending. We proposed a scheme of PEG–zinc acetate for battery application. The structure confirmation was done by using X-ray diffraction studies detecting the phase variation. The thermal properties demonstrate the optimization of melting point (Tm) as a function...
A series of Ce0.85Ca0.15−xSrxO2–δ(x = 0, 0.03 and 0.06) were synthesized via citrate–nitrate combustion method. Samples were first characterized by the X-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD and SEM results showed that a complete solid solution formed in fluorite structure and Ce0.85Ca0.15−xSrxO2−δ had homogeneous distribution of particle with grain size in...
The composition dependence of plasticizer (ethylenecarbonate(EC)/dimethyl carbonate(DMC))(70−x)wt% to Lithium bis(perfluoroethanesulfonyl)imide(LIBETI)(x)wt% salt (where x = 1.5, 3.0, 4.5, 6.0 wt%) on PVdF-co-HFP (25 wt%)/surface modified octadecylamine containing montmorrillonite (ODA-MMT) nano clay (5 wt%) matrix has been investigated by AC impedance, X-ray diffraction (XRD), Fourier transform infrared...
Biodegradable and natural rice starch (RS) polymer with lithium iodide salt (LiI) was used to prepare polymer electrolytes using solution cast technique. Polymer electrolyte films were characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD), and scanning electron microscopy (SEM). TGA and DSC thermograms demonstrate that decomposition temperature...
The investigation on the properties of LiCoPO4–graphitic carbon foams (LCP-GCF) composites is reported in this work. The diffraction analysis (XRD) on powders confirmed the presence of LiCoPO4 as major crystalline phase and Li4P2O7 and Co2P as secondary phases. The morphological investigation of the composites shows a layer of crystalline spongy-like material on the surface of the GCF for t = 0 h...
Li1.2Ni0.13Co0.13Mn0.54O2 powders have been prepared through co-precipitation of metal oxalate precursor and subsequent solid state reaction with lithium carbonate. X-ray diffraction pattern shows that the massive rock-like structure has a good layered structure and solid solution characteristic. Scanning electron microscope and transition electron microscope images reveal that the Li1.2Ni0.13Co0.13...
In this work, we investigate the electrical, structural, and thermal properties of composite polymer electrolytes (CPEs). Different mass fractions of antimony trioxide filler, Sb2O3, are added into poly(acrylic acid) (PAA)-based polymer electrolytes with N-lithiotrifluoromethane sulphonamide [LiN(SO2CF3)2] (LiTFSI) as doping salt. Characteristics such as alternating current (AC)–impedance spectroscopy,...
Hierarchical Fe5(PO4)4(OH)3·2H2O microflower was synthesized by a hydrothermal reaction with self-prepared β-FeOOH nanorod as raw material. The microflowers were self-assemblies of symmetric building blocks with deep grooves. The possible morphology evolution process was proposed. The microflowers morphology was retained when they were lithiated to prepare LiFePO4/C composites through a carbothermal...
Several computational errors in the paper are pointed out pertaining to the calculation of Gibbs energy from the measured overall pairing association constant. The calculation of ionic limiting molar conductances is discussed based on the tetrabutylammonium tetraphenylboride reference electrolyte method.
Layered cathode Li1.5Ni0.25Mn0.75O2.5 has been synthesized and coated by Li4Ti5O12. The pristine and coated Li1.5Ni0.25Mn0.75O2.5 powders are characterized by X-ray diffraction (XRD), indicating the materials remained the layered structure before and after coating. The coated Li4Ti5O12 has been detected by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy-dispersive...
Lithium-sulfur batteries have a poor cyclability and inferior rate capability due to the shuttle effect of lithium polysulfides. To solve these problems, a sulfur-coated MWCNT composite (S/MWCNT) was coated with conductive polypyrrole (PPy) to trap the polysulfides and facilitate charge and lithium ion transport. From the contact angle measurement, it is found that the PPy coating improves the wettability...
For the study of transport properties of a nano-composite material, an open circuit condition of current is considered, where the sum of diffusion current density, displacement current density, ohmic current density, and excess charge current density is vanished. Including the effects of drift and trapping of ions, drift and trapping diffusion coefficients are modeled respectively and the significance...
A novel carbon paste electrode modified with carbon nanotubes and 5-amino-2′-ethyl -biphenyl-2-ol was fabricated. The electrochemical study of the modified electrode, as well as its efficiency for electrocatalytic oxidation of ascorbic acid (AA), is described. The electrode was employed to study the electrocatalytic oxidation of AA, using cyclic voltammetry, chronoamperometry, and square-wave voltammetry...
The Na3.6Ni2.2(P2O7)2 compound was obtained by the conventional solid-state reaction. The sample was characterized by X-ray powder diffraction and vibrational and impedance spectroscopy. The AC electrical conductivity and the dielectric relaxation properties of this compound have been investigated by means of impedance spectroscopy measurements over a wide range of frequencies and temperatures, 209 kHz–1 MHz...
Highly crystalline layered Li1−xNaxNi1/3Co1/3Mn1/3O2 (x = 0, 0.001, 0.01, 0.03, 0.05) materials are synthesized by molten salts method and characterized by scanning electron microscopy, inductively coupled plasma (ICP), X-ray diffraction, Rietveld refinement, and electrochemical measurement, respectively. ICP, SEM, and EDS results show that Na ions are incorporated in LiNi1/3Co1/3Mn1/3O2. Rietveld...
Lithium titanate (Li4Ti5O12) has emerged as a promising anode material for lithium-ion (Li-ion) batteries. The use of lithium titanate can improve the rate capability, cyclability, and safety features of Li-ion cells. This literature review deals with the features of Li4Ti5O12, different methods for the synthesis of Li4Ti5O12, theoretical studies on Li4Ti5O12, recent advances in this area, and application...
NiZnS electrode has been investigated for use in oxygen evolution reaction in alkaline media. Nickel mesh electrode was coated with the ternary composition of NiZnS by four methods, viz., direct current electrodeposition, pulse electrodeposition, sonoassisted direct current electrodeposition and sonoassisted pulse electrodeposition. The oxygen evolution studies carried out using these electrodes resulted...
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