Electrode materials based on α-NiCo(OH)2 and rGO for high performance energy storage devices. Issue 104 (27th October 2016)

• Record Type: Journal Article
• Authors: Gonçalves, J. M.; Guimarães, R. R.; Nunes, C. V.; Duarte, A.; Brandão, B. B. N. S.; Toma, H. E.; Araki, K.
• Is Part Of: RSC advances. Volume 6:Issue 104(2016)
• Page Start: 102504
• Page End: 102512
• Publication Date: 2016-10-27
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra20317e
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Described herein is a composite material based on rGO and α-NiCo(OH)2 nanoparticles combining very fast charge/discharge processes with the high energy density of batteries, suitable for application in high performance energy storage devices. Abstract : Described herein is a composite material based on reduced graphene oxide (rGO) and α-NiCo(OH)2 nanoparticles exhibiting very fast charge/discharge processes, like that in capacitors combined with the high energy density of batteries, suitable for application to high performance energy storage devices. NiCo@rGO showed a superior performance compared to stabilized α-Ni(OH)2 and α-NiCo(OH)2 nanoparticles and Ni@rGO, the analogous composite of the former with rGO. In the nanocomposite, each rGO sheet is decorated with stabilized nickel–cobalt hydroxide nanoparticles conferring specific capacitances as high as 1300 F g −1 and discharge rates superior to 100 A g −1 . This nanomaterial is also demonstrated to be remarkably stable, retaining up to 96% of its maximum capacitance after 5000 galvanostatic charge/discharge cycles.