Electrochemical performances investigation of NiS/rGO composite as electrode material for supercapacitors

The composite with NiS nanorods anchored on reduced graphene oxide (rGO) has been prepared via a two-step hydrothermal method. With the corresponding precursors of hydroxide composites prepared during the first stage, ion exchange (from OH− to S2−) and reduction of GO are performed on subsequently,...

Full description

Saved in:
Bibliographic Details
Published in:Nano energy 2014-04, Vol.5, p.74-81
Main Authors: Yang, Jiaqin, Duan, Xiaochuan, Guo, Wei, Li, Di, Zhang, Huili, Zheng, Wenjun
Format: Article
Language:English
Subjects:
Applied sciences
Capacitors. Resistors. Filters
Chemical synthesis methods
Composite
Cross-disciplinary physics: materials science
rheology
Electrical engineering. Electrical power engineering
Electrode material
Exact sciences and technology
Graphene
Materials science
Methods of nanofabrication
Nanocrystalline materials
Nanoscale materials and structures: fabrication and characterization
Nanotubes
Nickel sulfide
Physics
Supercapacitors
Various equipment and components
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The composite with NiS nanorods anchored on reduced graphene oxide (rGO) has been prepared via a two-step hydrothermal method. With the corresponding precursors of hydroxide composites prepared during the first stage, ion exchange (from OH− to S2−) and reduction of GO are performed on subsequently, resulting in NiS/rGO composite. The NiS nanorods uniformly distribute on the surface of graphene, forming a 3D conductive network. The electrochemical performances of the composite are investigated in extenso as electrode materials for supercapacitors, and it exhibits preferable cycling performances and excellent capacitance. These satisfactory electrochemical behaviors can be attributed to the introduction of graphene, which enhances the specific surface area and electronic conductivity of the electrode, producing more active sites for the charging/discharging process and facilitating fast electron transport through the underlying graphene layers. [Display omitted] •The NiS/rGO composite has been prepared via a two-step hydrothermal method.•Ion exchange and reduction of GO occur simultaneously during the second stage.•The introduction of rGO enhance the electronic conductivity of the composite.•The composite exhibits high specific capacity and excellent cycle stability.
ISSN:2211-2855
DOI:10.1016/j.nanoen.2014.02.006