NDLI: Facile and scalable route to sheets-on-sheet mesoporous Ni–Co-hydroxide/reduced graphene oxide nanocomposites and their electrochemical and magnetic properties

Content Provider	Royal Society of Chemistry (RSC)
Author	Sathish, M. Kamaraj, P. Lakshminarasimhan, N. Subramani, K.
Copyright Year	2016
Abstract	A facile synthesis of sheets-on-sheet mesoporous Ni–Co-hydroxide/reduced graphene oxide (RGO) nanocomposites via the chemical decomposition of nickel cobalt hexacyanoferrate (NiCoHCF) complex is demonstrated. The chemical decomposition of NiCoHCF by NaOH resulted in the formation of Ni–Co-hydroxide directly on RGO that was confirmed by powder XRD analysis. The formation of Ni–Co-hydroxide nanosheets on RGO nanosheet was revealed using FE-SEM and HR-TEM analyses. The mesoporous nature of sheets-on-sheet Ni–Co-hydroxide/RGO nanocomposites was realized using BET surface area analysis and pore-size distribution. The electrochemical performance of Ni–Co-hydroxide/RGO nanocomposites with different weight ratios was evaluated using cyclic voltammetry, galvanostatic charge discharge measurements and electrochemical impedance spectroscopic analysis. The nanocomposite with a 1 : 1 ratio of Ni–Co-hydroxide and RGO exhibited a very high specific capacitance of 835 F g−1 at 1 A g−1 current density with an excellent capacity retention of 92% even after 5000 cycles. The magnetic properties of pristine Ni–Co-hydroxide and its nanocomposites with RGO were also investigated. The reported method is simple and scalable for growth of Ni–Co-hydroxide nanosheets over RGO nanosheets.
Starting Page	15941
Ending Page	15951
Page Count	11
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	6
Issue Number	19
Journal	RSC Advances
DOI	10.1039/c5ra27775b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Nanosheet Cobalt BET X-ray crystallography Cyclic voltammetry Mesoporous material Graphene Electrochemistry Chemical decomposition Capacitance Nickel Nanocomposite Electric current Electrical impedance
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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