Issue 66, 2017, Issue in Progress

Silver particle-loaded nickel oxide nanosheet arrays on nickel foam as advanced binder-free electrodes for aqueous asymmetric supercapacitors

Abstract

Conductive metal loading is an efficient approach for enhancing the electric conductivity of redox-active transition-metal oxide electrodes. In this study, Ag particle-loaded NiO/nickel foam (Ag-NiO/NF) composites were fabricated using a green chemistry method. The anchored Ag particles standing on the surface of NiO nanosheet arrays helped improve the electrical conductivity and were thus beneficial for supercapacitors (SCs). The as-developed Ag-NiO/NF electrode delivered a specific capacitance of 1254.9 F g−1 at the current density of 1 A g−1, which is higher than that of NiO/NF electrode (946.3 F g−1). Using such Ag-NiO/NF as a positive electrode, we further fabricated aqueous asymmetric SC devices with reduced graphene oxide as a negative electrode. Owing to the efficient electron transport and short ion diffusion paths in the designed electrode, the devices exhibited a high specific capacitance of 97.9 F g at 1 A g−1 with a high energy density of 26.7 W h kg−1 at a power density of 1017.1 W kg−1 and great cyclic stability.

Graphical abstract: Silver particle-loaded nickel oxide nanosheet arrays on nickel foam as advanced binder-free electrodes for aqueous asymmetric supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
05 Jun 2017
Accepted
06 Aug 2017
First published
29 Aug 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 41771-41778

Silver particle-loaded nickel oxide nanosheet arrays on nickel foam as advanced binder-free electrodes for aqueous asymmetric supercapacitors

S. Wu, K. S. Hui, K. N. Hui, J. M. Yun and K. H. Kim, RSC Adv., 2017, 7, 41771 DOI: 10.1039/C7RA06252D

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