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以ZrOCl2·8H2O为原料,结合溶胶凝胶法和超临界流体干燥技术制备了高分散纳米ZrO,粉体颗粒,通过X射线衍射仪(XRD)、高分辨透射电镜(HRTEM)、电化学阻抗谱(EIS)和循环伏安(CV)等技术手段研究探讨了ZrO2粉体颗粒的晶体缺陷、粉末晶粒尺寸大小及其电化学性能。成功地制备了粒径为10nm以下的近球形ZnO2三维网络纳米颗粒,实验结果表明。超临界流体干燥处理后的纯ZrO2晶粒基本保持完整,而3Y—ZrO2晶体缺陷较为明显。并首次对纯ZrO2的锂离子电化学性能作了一系列的初步研究,发现超临界流体处理后的ZrO2粉体具有很小的电化学阻抗;即使其作为锂离子电极材料容量可逆容量较低,但其多次循环后稳定性较好,这为锂离子电池材料的开发提供了新的思路。

Highly-dispersed ZrO2 nanoparticles (NPs) were successfully synthesized via sol-gel and supercritical fluid drying (SCFD) method with zirconium oxyehloride as the source. The as-synthesized ZrO2 was characterized by X-ray diffraction (XRD), high resolution transmission electron microscope (HRTEM), electrochemical impedance spectroscopy (EIS) and cyclic voltammetary (CV). The results indicate that the nearly spherical ZrO2 three-dimensional network NPs possess diameters of about 10nm, and the pure ZrO2 after SCFD treat ment maintains uniform crystal structure while the 3Y-ZrO2 have many crystal defects. The electrochemical performance of ZrO2 NPs showed that the pure ZrO2 NPs after SCFD treatment have very small electrochemical impedance and well-performance of cyclical stability, which provide a new orient of lithium batteries materials.

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