Title

Three-Dimensional Interconnected Binder-Free Mn--Ni--S Nanosheets for High Performance Asymmetric Supercapacitor Devices with Exceptional Cyclic Stability

Author's Department

Physics Department

Second Author's Department

Physics Department

Third Author's Department

Physics Department

Fourth Author's Department

Physics Department

Find in your Library

https://pubs.acs.org/doi/10.1021/acsaem.9b00435

All Authors

Nashaat Ahmed; Basant A. Ali; Mohamed Ramadan; Nageh K. Allam

Document Type

Research Article

Publication Title

ACS Applied Energy Materials

Publication Date

1-1-2019

doi

10.1021/acsaem.9b00435

Abstract

A facile one-step method was demonstrated for the electrodeposition of manganese-nickel sulfide (Mn-Ni-S) 3D interconnected sheets on nickel foam substrates. The as-synthesized materials were characterized using field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS) techniques. Upon their use as supercapacitor electrodes, the electrodeposited Mn-Ni-S showed exceptionally high specific capacitance (2849 and 1986 F/g at 1 and 5 A/g, respectively) and an excellent rate capability. Using Fe3O4-GR as the negative electrode and the Mn-Ni-S 3D interconnected sheets as the positive electrode to assemble an asymmetric supercapacitor device revealed high power density (800 W kg-1) and energy density (40.44 Wh kg-1) with 90% capacitance retention and a Columbic efficiency of 100% after 11 000 cycles, indicating the high potential of the fabricated materials for practical energy storage devices.

First Page

3717

Last Page

3725

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