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LiNiPO4 has been the focus of research in developing environmentally friendly, low cost and high performance cathode materials for lithium-ion batteries. The aim of this work is to synthesize LiNi0.5Co0.45Zn0.05PO4 cathode material using solid-state reaction method at 850 °C for 20 hours and all the parameters compared with LiNiPO4. The X-ray diffraction (XRD) analysis confirmed that LiNi0.5Co0.45Zn0.05PO4 phase is well crystallized with olivine structure indexed by orthorhombic symmetry with Pnma space group. The phase purity supported by energy dispersive spectroscopy (EDS) and scanning electron microscope (SEM). Local structure of the LiNi0.5Co0.45Zn0.05PO4 phospho-olivine material has been investigated by Fourier transforms infrared spectra (FTIR). All the parameters of LiNi0.5Co0.45Zn0.05PO4 are found in good agreement with XRD, FTIR results of LiNiPO4. Impedance spectroscopy technique has been used to study the cathode materials because it can reveal the relationship between the crystal lattice with the electrochemical properties. [ABSTRACT FROM AUTHOR]

Ferrites made of copper substituted Mg0.6-xZn0.4CuxFe2O4 (x = 0.0, 0.1, 0.2 and 0.3) are extremely resistive and magnetic materials. They were produced using the ceramic method, and their structural, compositional, morphological, and functional characteristics were assessed using XRD, SEM, FT-IR, vibrating sample magnetometer (VSM), and dc electrical resistivity, respectively. They belong to the Fd-3m space group and have a spinel structure. After being calcined at 1000 °C, their particle size ranged from 1 to 1.56 μm. With the help of FT-IR analysis, which had absorption bands in the ranges of 570–576 cm−1 and 424–430 cm−1 for higher and lower frequency, respectively, their spinel structure was confirmed. The coercivity coefficient ranges from 73.33 to 154.7 Oe depending on the composition. The highest DC electrical resistivity was found to be 106 Ω-cm at x = 0.1. [ABSTRACT FROM AUTHOR]

Strong electrical resistivity, low eddy current and dielectric losses, high saturation magnetization, high permeability, and other significant electrical and magnetic properties of nano-ferrites are only a few. In this investigation a sincere effort has been tried to manufacture Co 0.7 Cu 0.2 Zn 0.1 Fe 2- x Al x O 4 (x = 0, 0.02, 0.04, 0.06, 0.08, 0.10) nano-ferrites utilizing sol-gel auto-combustion process and systematically characterize the structural, optical, electrical and magnetic features. All the peaks belonging to XRD confirmed a structure of the spinel class and single phase with zero impurities. The intensity ratios are generated for a number of cation combinations occupying tetrahedral and octahedral B site. The higher band (ν 1) is identified in between wave numbers 550-600 cm−1 as a result of the vibrations of stretching pertaining to the metal-oxygen tetrahedral band. The grain sizes are measured by the use of image J software associated with the SEM, which are indicated on the images in the range of 3.14 μm–1.215 μm. With a frequency-independent characteristic, the dielectric loss dwindles quickly at low frequencies and slows down at high frequencies. Because of spin non-collinearity at the crystal's surface, the saturation magnetization values climb as particle sizes increase. The coercivity values gradually decline as aluminum concentration rises. [Display omitted] • Nano-crystalline ferrites are successfully synthesized by a facile sol-gel auto-combustion method. • Single phase cubic spinel structure has been obtained and the lattice constant decreases with increasing concentration. • The saturation magnetization was obtained for 61.431 emu/g at x = 0 compound. • The dielectric constant decreases steeply at lower frequencies and remains constant at higher frequencies. [ABSTRACT FROM AUTHOR]