Jump to main content
Jump to site search

Issue 43, 2018

In situ grown nickel selenide on graphene nanohybrid electrodes for high energy density asymmetric supercapacitors

Author affiliations

Abstract

Nickel selenide (NiSe) nanoparticles uniformly supported on graphene nanosheets (G) to form NiSe–G nanohybrids were prepared by an in situ hydrothermal process. The uniform distribution of NiSe on graphene bestowed the NiSe–G nanohybrid with faster charge transport and diffusion along with abundant accessible electrochemical active sites. The synergistic effect between NiSe nanoparticles and graphene nanosheets for supercapacitor applications was systematically investigated for the first time. The freestanding NiSe–G nanohybrid electrode exhibited better electrochemical performance with a high specific capacitance of 1280 F g−1 at a current density of 1 A g−1 and a capacitance retention of 98% after 2500 cycles relative to that of NiSe nanoparticles. Furthermore, an asymmetric supercapacitor device assembled using the NiSe–G nanohybrid as the positive electrode, activated carbon as the negative electrode and an electrospun PVdF membrane containing 6 M KOH as both the separator and the electrolyte delivered a high energy density of 50.1 W h kg−1 and a power density of 816 W kg−1 at an extended operating voltage of 1.6 V. Thus, the NiSe–G nanohybrid can be used as a potential electrode material for high-performance supercapacitors.

Graphical abstract: In situ grown nickel selenide on graphene nanohybrid electrodes for high energy density asymmetric supercapacitors

Supplementary files

Article information


Submitted
06 Aug 2018
Accepted
01 Oct 2018
First published
01 Oct 2018

Nanoscale, 2018,10, 20414-20425
Article type
Paper

In situ grown nickel selenide on graphene nanohybrid electrodes for high energy density asymmetric supercapacitors

B. Kirubasankar, V. Murugadoss, J. Lin, T. Ding, M. Dong, H. Liu, J. Zhang, T. Li, N. Wang, Z. Guo and S. Angaiah, Nanoscale, 2018, 10, 20414 DOI: 10.1039/C8NR06345A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.


Social activity

Search articles by author

Spotlight

Advertisements