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        PREPARATION AND ELECTROMAGNETIC PROPERTIES OF BaFe12O19–Ni0.8Zn0.2Fe2O4/POLYPYRROLE COMPOSITE FILM

        YAN WANG,YING HUANG,Qiufen Wang,QIAN HE 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2013 NANO Vol.8 No.2

        BaFe12O19–Ni0.8Zn0.2Fe2O4/Polypyrrole composite film [including three doping acids, dodecyl benzene sulfonic acid (DBSA), camphor sulfonic acid (CSA) and p-toluenesulfonic acid (TSA)] was prepared by sol–gel method and in situ chemical oxidative polymerization. The structure, morphologies, conductivities, magnetic properties and microwave absorption properties of the composite film were characterized by using XRD, FESEM, FTIR, Four-probe tester, VSM and Vector network analyzer. The results show that the conductivity of acid-doped Polypyrrole composite film is higher than that of pure Polypyrrole composite film. The saturation magnetization (Ms) and remanent magnetization (Mr) of the composite film are lower than those of BaFe12O19–Ni0.8Zn0.2Fe2O4 film. However, the electromagnetic properties are in the contrary. The microwave absorption properties of the composite film are much better than those of BaFe12O19–Ni0.8Zn0.2Fe2O4, which mainly depends on the increasing of the dielectric loss. A minimum reflection loss of the DBSA-doped composite film is −17.6 dB at 9.3 GHz with the thickness at 3.0 mm.

      • KCI등재후보

        Graphene Supported Li2SnO3 as Anode Material for Lithium-Ion Batteries

        Yang Zhao,Ying Huang,Qiufen Wang,XiaoYa Wang,Meng Zong,Haiwei Wu,Wei Zhang 대한금속·재료학회 2013 ELECTRONIC MATERIALS LETTERS Vol.9 No.5

        The graphene supported Li2SnO3 composites were prepared via a deoxidation technique. The structure, morphology and electrochemical properties of the composites were detected by means of XRD, SEM, TEM,Raman, TGA and electrochemical measurements. The Li2SnO3 powders could be distributed on the graphene sheets (GNS). The Li2SnO3/GNS composites exhibit good electrochemical performance with high capacity and good cycling stability (582.2 mAh/g after 50 cycles at 60 mA/g). The performance is ascribed to the presence of graphene keeping the structure stable. The composites Li2SnO3/GNS exhibited a better electrochemical property than Li2SnO3 and graphene.

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