Shahid Hussain

Ag-doped NiO porous network structure on Ni foam as electrode for supercapacitors

Ag-doped NiO porous network structure grown on Ni foam has been synthesized through a facile hydrothermal method. Then network structure is assembled by numerous interconnected superfine nanowires, and Ag is uniformly distributed in the body of NiO network. The unique porous network structure doped by conductive Ag and the direct integration of electrode materials on Ni foam current collector provide efficient pathways for electron transport and electrolyte ions diffusion. The electrochemical results demonstrate that the Ag-doped NiO electrode exhibits a specific capacitance of 570.7xa0Fxa0g−1 and excellent cycling stability. The Ag-doped NiO electrode with relatively high electrochemical performance is a promising candidate for the supercapacitor electrodes. These results can also provide strategies to develop advanced electrode materials supercapacitor applications.

Core–shell NiCo 2 O 4 @ZnWO 4 nanosheets arrays electrode material deposited at carbon-cloth for flexible electrochemical supercapacitors

Three dimensional (3D) hierarchical NiCo2O4 nanosheet arrays (NSAs)@ZnWO4 nanoflakes (NFs) core–shell structures have been successfully grown on a carbon cloth (CC) using two-step hydrothermal approach, following a heat treatment route. Compared with the pure CC@NiCo2O4 NSAs electrode, the binder-free CC@NiCo2O4@ZnWO4 hybrid system gives rise to a higher specific capacitance of 872.0 Fg−1 at a low current density of 1 Ag−1 and 791.1 Fg−1 at a quite high current density of 20 Ag−1, and retainsu2009~u200992.9% of the initial capacitance even after 5000 cycles of charge and discharge. The excellent electrochemical performance of CC@NiCo2O4@ZnWO4 electrode is attributed to its high specific surface area of the 3D structures, fast electron transport property of NiCo2O4 material as the skeleton, and the synergistic effect between NiCo2O4 and ZnWO4 materials, demonstrating that CC supported NiCo2O4 NSAs@ZnWO4 NFs composite as the high-performance electrode materials are highly desirable for the application of flexible supercapacitors.