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An improved frequency dependent AC-conductivity ng of poly(aniline-co-o-fluoroaniline)s (PA-co-o-FAs) has been recorded which are synthesized by in-situ copolymerization of aniline with o-fluoroaniline by oxidation of the monomers mixture (in different molar feed ratios) using aqueous solution of ammonium persulfate as oxidant. The electrical AC conductivity of the copolymers has been measured at...
A facile way of synthesizing LiFePO4/C with high tap density was introduced. LiFePO4/C composites were synthesized by a combination of wet ball milling, spray drying, and carbothermal reduction technology using inexpensive FePO4. The effect of sphericity of secondary microsphere on electrochemical properties and tap density of LiFePO4/C composite was systematically investigated. The sphericity of...
A LiFePO4/C material with different amounts of iron phosphides was synthesized by a sol–gel method with different calcination temperatures. XRD, HRTEM, SEM, FTIR, BET, Raman, and magnetic measurements were carried out to characterize the physical properties of the LiFePO4/C, while EIS, CV, and charge–discharge tests were carried out to characterize the electrochemical performance. It is obtained that...
Lithium iron phosphate/carbon (LiFePO4/C) composites with high energy density were synthesized by wet ball milling, spray drying, and carbothermal reduction method. The effect of spray drying technological conditions on the performance of LiFePO4/C composites was systematically investigated. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), electrochemical...
Influence of grain size on electrical properties of nanocrystalline yttrium zirconate (Y2Zr2O7) prepared by hydrothermal method is reported. Appropriate heat treatment has yielded different particle sizes in the range from 2.9 to 30.3 nm. Structural phase analysis by x-ray diffraction, Rietveld analysis and Raman spectroscopy confirmed the cubic pyrochlore structure of YZO. Electrical conductivity...
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