Amorphous Cobalt Boron Alloy@Graphene Oxide Nanocomposites for Pseudocapacitor Applications
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2017年第5期
论文作者：Wei Zhang Xiaoli Du Yueyue Tan Jinbo Hu Zhen Li Bohejin Tang
文章页码：438 - 443
摘 要：Amorphous Co–B alloy nanoparticles grown on graphene sheets were synthesized via a chemical reduction approach and successfully used for an application as a pseudocapacitor. This study aims to improve the capacity and cycling stability of amorphous Co–B alloy nanoparticles grown on conductive graphene sheets. The products were characterized by X-ray powder diffraction, scanning electron microscopy, and transmission electron microscopy. As electrode materials for pseudocapacitors, the amorphous Co–B alloy grown on graphene oxide（Co–B@GO） exhibits a high specific capacitance of 460 F g-1, which is nearly 1.5 times greater than that of bare Co–B nanoparticles at 1 Ag-1. The specific capacitance preserved 84% of the initial capacitance even after 1000 cycles at a scan rate of 10 mV-1, suggesting its promising potential as pseudocapacitor materials.
Wei Zhang1，Xiaoli Du2，Yueyue Tan1，Jinbo Hu3，Zhen Li1，Bohejin Tang1,4
1. College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science2. School of Materials Engineering, Shanghai University of Engineering Science3. Department of Chemistry, University of Minnesota, 207 Pleasant St.SE, Minneapolis4. Department of Chemistry, University of Minnesota
摘 要：Amorphous Co–B alloy nanoparticles grown on graphene sheets were synthesized via a chemical reduction approach and successfully used for an application as a pseudocapacitor. This study aims to improve the capacity and cycling stability of amorphous Co–B alloy nanoparticles grown on conductive graphene sheets. The products were characterized by X-ray powder diffraction, scanning electron microscopy, and transmission electron microscopy. As electrode materials for pseudocapacitors, the amorphous Co–B alloy grown on graphene oxide（Co–B@GO） exhibits a high specific capacitance of 460 F g-1, which is nearly 1.5 times greater than that of bare Co–B nanoparticles at 1 Ag-1. The specific capacitance preserved 84% of the initial capacitance even after 1000 cycles at a scan rate of 10 mV-1, suggesting its promising potential as pseudocapacitor materials.
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