Electrodeposition of ultrathin nickel–cobalt double hydroxide nanosheets on nickel foam as high-performance supercapacitor electrodes
2015
Xing, Junheng | Wu, Shaoyan | Ng, K. Y Simon
The present work demonstrates a facile, one-step electrodeposition approach for the preparation of ultrathin Ni–Co double hydroxide (DH) nanosheets on Ni foam as supercapacitor electrodes. The as-prepared Ni–Co DH electrodes in the electrolyte with Ni/Co ratio of 4/1 deliver an ultrahigh specific capacitance of 3028 F g⁻¹ at 2 A g⁻¹ as well as very good cyclic stability probably due to their robust and well-defined nanoporous structure and amorphous nature. The Ni–Co DH nanosheets also present an impressive energy density of 127.22 W h kg⁻¹ at 0.605 kW kg⁻¹, and the value still remains at 93.48 W h kg⁻¹ at a high power density of 15.125 kW kg⁻¹, indicating the excellent rate capability of these materials. In addition, the simple electrodeposition method involved in this study can potentially be scaled up for economic production of high performance supercapacitors.
Afficher plus [+] Moins [-]Mots clés AGROVOC
Informations bibliographiques
Cette notice bibliographique a été fournie par National Agricultural Library
Découvrez la collection de ce fournisseur de données dans AGRIS