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.
参考文献
| [1] | 李茹;李占双;辛艳风 等.纳米二氧化锆制备方法论进展[J].应用科技,2001,28(09):52-54. |
| [2] | Hagenmuiler D;Van Cool W.Solid electrolytes:general principal,characterization,material,applications[M].New York:Academic Press,Inc,1978 |
| [3] | Barinov S M;Evdokimov V Y .Effect of fine particles of metastable zirconium dioxide on mechanical properties of nickel aluminide[J].Metally,1996,3:121-125. |
| [4] | Toraya H;Yoshimura M;Somiya S .Calibration curve for quantitative analysis of the monoclinic-tetragonal ZrO2 system by X-ray dffraction[J].Journal of the American Ceramic Society,1984,67(06):Cl19-C121. |
| [5] | Gao Y F;Masuda Y;Ohta H et al.Room temperature preparation of ZrOe precursor thin film in an aqueous per- oxozirconium-complex solution[J].Chemistry of Materials,2004,16:2615-2622. |
| [6] | Sue-min Chang;Ruey-an Doong .Interband Transitions in Sol-Gel-Derived ZrO2 Films under Different Calcination Conditions[J].Chemistry of Materials: A Publication of the American Chemistry Society,2007(19):4804-4810. |
| [7] | Zhanxia Shu;Xiuling Jiao;Dairong Chen .Template-free solvothermal synthesis of size-controlled yttria-stabilized-zirconia hollow spheres[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2011(37):9200-9206. |
| [8] | Lashtabeg A;Drennan J;Knibbe R et al.Synthesis and characterisation of maeroporous yttria stabilised zirconia(YSZ)using polystyrene spheres as templates[J].Mi- croporous and Mesoporous Materials,2009,117:395-401. |
| [9] | Chen Gairong;Xu Shaohong;Miao Yu .The study of pre paring Y2 03 stabilized ZrO2 nanometer powder in stearic acid sol by microwave heating[J].Journal of Functional Materials,2003,34(02):160-162. |
| [10] | 黄孝瑛.材料微观结构的电子显微学分析[M].北京:冶金工业出版社,2008 |
| [11] | 曾冬梅 .CdZnTe晶体的缺陷分析与应力测试[D].西安:西北工业大学,2005. |
| [12] | Cho J;Kim Y J;Kim T J et al.Zero Strain Intercala- tion cathode for reehargeable Li-ion cell[J].Angewandte Chemie International Edition,2001,40:3367-3372. |
| [13] | Lee H J;Kim S B;Park Y J .Surface characterization of ZrO2 coated LiCoO2 thin film during storage[J].Bulletin of the Korean Chemical Society,2011,32(08):2799-2801. |
| [14] | Lim S H;Cho J .PVP-assisted ZrO2 coating on LiMn2 04 spinel cathode nanoparticles prepared by MnO2 nanowire templates[J].Electrochemistry Communica- tions,2008,10:1478-1481. |
| [15] | Jayaraj B;Desai V H;I.ee C K et al.Electrochemical impedance spectroscopy of porous ZrO2-8wt Y203 and thermally grown oxide on nickel aluminide[J].Materi- als Science and Engineering A,2004,372:278-286. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%