两步法原位制备NiO/N-RGO复合材料及其电化学性能

Preparation of NiO/N-RGO composite by two-step in-situ method and its electrochemical properties

采用两步法制备了氧化镍/掺氮石墨烯(NiO/N-RGO)复合材料,通过X射线粉末衍射(XRD)、场发射扫描电子显微镜(FESEM)、拉曼光谱(Raman)和X射线光电子能谱(XPS)对样品的形貌和结构进行表征。利用循环伏安、电化学交流阻抗和恒电流充放电测试了复合电极材料的电化学性能。结果表明,线状NiO均匀地负载在N-RGO片层上,呈三维网络结构。NiO/N-RGO复合材料呈现出良好的倍率性能和循环稳定性能。

Nickel oxide/nitrogen-doped graphene（ NiO/N-RGO） composites are synthesized by two-step in-situ method.The morphology and structure of the prepared sample are characterized by X-ray diffraction（ XRD）,field emission scanning electron microscope（ FESEM）,Raman spectroscopy and X-ray photoelectron spectroscopy（ XPS）.The electrochemical performances of the samples are tested by cyclic voltammetry,AC impedance and constant current charge and discharge methods. The results show that the linear NiO is uniformly supported on the N-RGO sheets and exhibits a three-dimensional network structure. The NiO/N-RGO composites show good magnification performance and cyclic stability.