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Cathode material Li [Li0.2Ni0.2Co0.08Mn0.52−xCux]O2 (x = 0, 0.01, 0.03, 0.05, 0.07) has been synthesized via carbonate coprecipitation method and modified by Cu2+ which was introduced at different stages. The crystal structure features, morphology, and electrochemical properties of the powders are studied in detail using X-ray diffraction spectroscopy, scanning electron microscopy, EDS spectroscopy,...
Cobalt–nickel sulfide (NiCo2S4) was directly grown on nickel foam by a facile hydrothermal method. The effect of four different sulfur sources, the composite step and RGO density on the morphology and electrochemical performance of NiCo2S4 electrode for supercapacitor were investigated in detail. The results exhibited that under the same conditions, using the thioacetamide as the sulfur source, the...
Li2FeSi0.98M0.02O4/C (M = Ti, Ag, Cu, V, Pb) was synthesized as cathode material for lithium-ion battery by the solid-state method. The electrochemical performance of Li2FeSi0.98M0.02O4/C was investigated by constant current charge–discharge test, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The results show that the materials doped with Ti or Ag at the Si site deliver...
In this paper, LiMn1−xMgxPO4·Li3V2(PO4)3/C (x = 0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.10) and LiMnPO4·Li3V2−yAly(PO4)3/C (y = 0.01, 0.02, 0.03, 0.05, 0.07, 0.10) composite cathode materials for lithium-ion batteries were successfully synthesized by a simple sol-gel method and modified by Mg2+ doped and Al3+ doped. The effects of Mg2+ and Al3+ doping on the microstructure and electrochemical...
In this paper, Li2Fe1−yMgySiO4/C (y = 0, 0.01, 0.02, 0.03, 0.05), a cathode material for lithium-ion battery was synthesized by solid-state method and modified by doping Mg2+ on the iron site. The effects of Mg2+ doping on the crystal structure and electrochemical performance Li2FeSiO4 was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and electrochemical tests. Electrochemical...
The samples of xLi3V2(PO4)3·yLiFe0.8Mn0.2PO4/C (x:y = 1:0, 3:1, 1:1, 1:2, 0:1) are facilely prepared via a ball milling-assisted two-step sintering route. According to the results of Rietveld refinement, the xLi3V2(PO4)3·yLiFe0.8Mn0.2PO4/C (x, y ≠ 0) composites are composed of orthorhombic LiFe0.8Mn0.2PO4 and monoclinic L3V2(PO4)3. Electrochemical tests show that the faster reaction kinetics improve...
ZnO-coated LiMn2O4 cathode materials were prepared by a combustion method using glucose as fuel. The phase structures, size of particles, morphology, and electrochemical performance of pristine and ZnO-coated LiMn2O4 powders are studied in detail by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), cyclic voltammetry (CV), electrochemical impedance...
The amorphous Co3O4 nanostructure, which adopted sodium hexametaphosphate as structure-directing agent, has been successfully synthesized in large scale via two steps: preparation of the precursor and the calcination process. The results of X-ray diffraction indicate that the prepared materials are mainly composed of Co3O4; the formless Co3O4 nanoplate with loose structures is observed by scanning...
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