采用原位聚合法制得聚苯胺包覆r-GO/Fe_3O_4锂离子电池负极材料,通过X射线衍射、恒流充放电测试及电化学测试技术研究聚苯胺的包覆量对复合材料的组成及性能影响。结果表明,聚苯胺以无定型态分布于r-GO/Fe_3O_4中,其引入并未改变r-GO/Fe...采用原位聚合法制得聚苯胺包覆r-GO/Fe_3O_4锂离子电池负极材料,通过X射线衍射、恒流充放电测试及电化学测试技术研究聚苯胺的包覆量对复合材料的组成及性能影响。结果表明,聚苯胺以无定型态分布于r-GO/Fe_3O_4中,其引入并未改变r-GO/Fe_3O_4的结构,经聚苯胺包覆后复合材料的电化学性能提升,其中聚苯胺的包覆量为0.15 mol时,复合材料的阻抗最小,首次充放电比容量分别为569.332和645.720 m Ah/g,库仑效率达86.8%,经过20次循环后,库仑效率保持在98%以上,嵌锂容量保持率稳定在81.1%,循环性能良好。展开更多
Nano-sized Fe3O4 powder was prepared through an Oxygenation-Hydrothermal method. The chitosan magnetic complex was prepared by coating chitosan on the surface of Fe3O4 powders through Microlatex-Crosslinking Method. T...Nano-sized Fe3O4 powder was prepared through an Oxygenation-Hydrothermal method. The chitosan magnetic complex was prepared by coating chitosan on the surface of Fe3O4 powders through Microlatex-Crosslinking Method. The product was characterized by IR,XRD,TEM,Vibrating Sample Magnetometer (VSM),TG methods. Results show that the as-prepared powder is 25 nm in size and shows supermagnetism. The content of magnetite in microspheres is 37.8%. The mechanism for the coating reaction of chitosan to Fe3O4 nanoparticles is also suggested.展开更多
文摘采用原位聚合法制得聚苯胺包覆r-GO/Fe_3O_4锂离子电池负极材料,通过X射线衍射、恒流充放电测试及电化学测试技术研究聚苯胺的包覆量对复合材料的组成及性能影响。结果表明,聚苯胺以无定型态分布于r-GO/Fe_3O_4中,其引入并未改变r-GO/Fe_3O_4的结构,经聚苯胺包覆后复合材料的电化学性能提升,其中聚苯胺的包覆量为0.15 mol时,复合材料的阻抗最小,首次充放电比容量分别为569.332和645.720 m Ah/g,库仑效率达86.8%,经过20次循环后,库仑效率保持在98%以上,嵌锂容量保持率稳定在81.1%,循环性能良好。
文摘Nano-sized Fe3O4 powder was prepared through an Oxygenation-Hydrothermal method. The chitosan magnetic complex was prepared by coating chitosan on the surface of Fe3O4 powders through Microlatex-Crosslinking Method. The product was characterized by IR,XRD,TEM,Vibrating Sample Magnetometer (VSM),TG methods. Results show that the as-prepared powder is 25 nm in size and shows supermagnetism. The content of magnetite in microspheres is 37.8%. The mechanism for the coating reaction of chitosan to Fe3O4 nanoparticles is also suggested.