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收起Hierarchal hollow micro/nanostructures have high specific surface areas, low density, better dispersity, and better permeation, and hence they have widespread potential applications in catalysis, gas sensors, lithium batteries, and other areas. Studies on hierarchal hollow micro/nanostructures fabrication have attracted significant interest. In this paper, hierarchal hollow Ni(OH)2 have been used as raw materials, hierarchal hollow LiNiO2 have been successfully prepared. The surface morphology and internal structure of the product have been detected by means of X ray diffraction (XRD) and Scanning Electron Microscope (SEM). In addition, electrochemical property of the obtained hierarchal hollow LiNiO2 have also been investigated. The main research contents and results are listed as follows. ⑴ Synthesis of hierarchal hollow Ni(OH)2 We use the one-pot method, Ni(NO3)·6H2O, glycine, anhydrous Na2SO4, NaOH have been used as raw materials. By means of X ray diffraction (XRD) and Scanning Electron Microscope (SEM), we finally find the optimal conditions, hierarchal hollow Ni(OH)2 have been successfully prepared. ⑵Synthesis of hierarchal hollow LiNiO2 and their application in lithium batteries. In the experiment, the prepared Ni(OH)2 have been used as raw materials. Hierarchal hollow LiNiO2 are synthesized by adjusting the calcination atmosphere, calcination temperature, calcination time, ratio of material mixing, stirring time and heating rate. By means of X ray diffraction (XRD), Scanning Electron Microscope (SEM), specific surface area and pore size tester (BET) to detect the surface morphology and internal structure of the product. In order to make the comparison, solid spherical LiNiO2 was also prepared in this paper. The obtained hierarchal hollow LiNiO2 have higher specific surface area and better electrochemical performance than solid spherical LiNiO2.
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