A layered lithium-rich solid solution material Li[Li0.2Mn0.54Ni0.13Co0.13]O2 with an Ag/C coating layer was prepared by a method combining coprecipitation and elemental chemical deposition. The effects of the Ag/C coating layer on the electrochemical performance of Li[Li0.2Mn0.54Ni0.13Co0.13]O2 were studied by X-ray diffraction (XRD), field emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), constant current charge-discharge, cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and X-ray energy dispersive spectroscopy (EDS). The results show that the thickness of the Ag/C coating layer is about 25 nm, and the Ag/C coating maintains the hexagonal layered structure of the solid solution material α -NaFeO2.
运用共沉淀和元素化学沉积相结合的方法,制备出了具有Ag/C包覆层的层状富锂固溶体材料Li[Li0.2Mn0.54Ni0.13Co0.13]O2.通过X射线衍射(XRD)、场发射扫描电子显微镜(SEM)、透射电子显微镜(TEM)、恒流充放电、循环伏安(CV),电化学阻抗谱(EIS)和X射线能量散射谱(EDS)方法,研究了Ag/C包覆层对Li[Li0.2Mn0.54Ni0.13Co0.13]O2电化学性能的影响.结果表明,Ag/C包覆层的厚度约为25nm,Ag/C包覆在保持了固溶体材料α-NaFeO2六方层状