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Journal of Applied Electrochemistry

, Volume 49, Issue 12, pp 1181–1191 | Cite as

Study of NiO/CNSs hybrid nanostructure as an electrode material: synthesis and excellent electrochemical performance for application of supercapacitors

  • Sonal Singhal
  • A. K. ShuklaEmail author
Research Article
  • 42 Downloads
Part of the following topical collections:
  1. Capacitors

Abstract

A hybrid nanostructure comprising nickel oxide nanoparticles and carbon nanospheres (NiO/CNSs), synthesized via wet chemical process is demonstrated as high-performance electrochemical supercapacitors. The resulting structure exposes that NiO/CNSs electrode possesses irregularly shaped nanoparticles. The NiO/CNSs hybrid nanostructure gives a smaller contact angle of 7° for 6 M KOH electrolyte solution revealing better surface wettability, which enhances the transportation of electrolytic ions into the surface of the electrode material. Furthermore, oscillator strength of Raman active modes confirms the presence of disorder and lower degree of graphitization, which play an important role to improve the electrochemical performance. The NiO/CNSs electrode exhibits a high-specific capacitance of 1380 F g−1 at a current density of 4 A g−1 and long cycle life with 97% charge retention after 1000 cycles. These outcomes reveal that NiO/CNSs can be a promising electrode material for supercapacitors.

Graphic abstract

Keywords

Nickel oxide Carbon nanospheres Supercapacitor Specific capacitance 

Notes

Acknowledgements

The authors gratefully acknowledge the Nanoscale Research Facility (NRF) and Central Research Facility (CRF) of Indian Institute of Technology (IIT) Delhi for providing the characterization facilities. One of the author (S. Singhal) would like to acknowledge the University Grants Commission (UGC) for providing the financial support.

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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Laser Assisted Material Processing and Raman Spectroscopy Laboratory, Department of PhysicsIndian Institute of Technology DelhiHauz KhasIndia

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