Journal
ELECTROCHIMICA ACTA
Volume 111, Issue -, Pages 937-945Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.08.094
Keywords
NiCo2O4; Reduced graphene oxide; Nanoflake; Supercapacitor
Categories
Funding
- National Natural Science Foundation of China [21065005, 21165010, 21275135]
- National Basic Research Program of China (973 Program) [2020CB933600]
- Chinese Academy of Sciences [KJCX2-YW-H11]
Ask authors/readers for more resources
Reduced graphene oxide (RGO)/nickel cobaltite (NiCo2O4) nanoflake composites were prepared by combining in situ assembling and subsequent thermal treatment. The RGO/NiCo2O4 composites were characterized by scanning electron microscopy, energy dispersive spectroscopy, transmission electron microscopy, X-ray powder diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, nitrogen adsorption/desorption isotherms and thermogravimetric analysis. Cyclic voltammetry and chronopotentiometry measurements were performed to investigate the electrochemical properties of the composites. Superior performances were achieved with high specific capacitance of 1693 F g(-1) at 1 A g(-1), good rate capability (67.6% capacity retention at 16 A g(-1)) and long-term cyclability (only 9.2% loss after 2000 cycles). The binary redox couples of Ni2+/Ni3+ and Co2+/Co3+, ultrathin nanoflake structure, together with the high electrical conductivity of RGO to the outside current collectors are responsible for the excellent electrochemical performances of the RGO/NiCo2O4 composite, thus suggesting its potential application as an effective electrode material for supercapacitors. (C) 2013 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available