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Synthesis of NiO/Ag nancomposites by micro-emulsion method and the capacitance performance as electrodes

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Abstract

Oxidized nickel/silver (NiO/Ag) nanocomposites were prepared via micro-emulsion method. In the method, the NiO nanospheres were dispersed in ethanol including sodium dodecyl sulfonate (SDS) and sonicated to form homogeneous suspension, and then an appropriate amount of AgNO3 aqueous solution was added to this suspension above, forming a micro-emulsion. In the micro-emulsion, the NiO nanospheres were surrounded with many Ag+ ions. With the adding of NaBH4, Ag+ ions were reduced to Ag nanospheres. Finally, a series of NiO/Ag nanocomposites were prepared successfully. The microstructures of as-prepared samples were characterized by the XRD, SEM. The results showed that NiO and Ag nanospheres formed uniform nanocomposites. The capacitance performance of NiO/Ag nanocomposites electrodes with different Ag loading contents was investigated. The results showed that the capacitance performance of NiO/Ag nanocomposites was accordingly increased as the Ag content increases. The capacitance of the NiO/Ag electrodes with 3 % Ag loading was effective to obtain fully reversible and higher specific capacitance of ~322 F g−1 at 1 A g−1 current density.

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Acknowledgments

The authors are grateful for financial aid from the National Natural Science Foundation of China (51563022), Gansu Science and Technology Support Project (1504GKCA093).

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Authors and Affiliations

  1. School of Chemical Engineering, Northwest University of Nationalities, Lanzhou, 730030, China

    Yanbin Wang & Qiong Su

  2. Key Laboratory for Utility of Environment-friendly Composite Materials and Biomass in Universities of Gansu Province, Lanzhou, 730030, China

    Yanbin Wang & Qiong Su

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  1. Yanbin Wang
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Correspondence to Qiong Su.

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Wang, Y., Su, Q. Synthesis of NiO/Ag nancomposites by micro-emulsion method and the capacitance performance as electrodes. J Mater Sci: Mater Electron 27, 4752–4759 (2016). https://doi.org/10.1007/s10854-016-4355-2

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  • DOI: https://doi.org/10.1007/s10854-016-4355-2

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