Title

3D Interconnected Binder-Free Electrospun MnO@C Nanofibers for Supercapacitor Devices

Author's Department

Physics Department

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https://doi.org/10.1038/s41598-018-26370-z

Document Type

Research Article

Publication Title

Scientific Reports

Publication Date

12-1-2018

doi

10.1038/s41598-018-26370-z

Abstract

© 2018 The Author(s). Rational design of binder-free materials with high cyclic stability and high conductivity is a great need for high performance supercapacitors. We demonstrate a facile one-step synthesis method of binder-free MnO@C nanofibers as electrodes for supercapacitor applications. The topology of the fabricated nanofibers was investigated using FESEM and HRTEM. The X-ray photoelectron spectroscopy (XPS) and the X-ray diffraction (XRD) analyses confirm the formation of the MnO structure. The electrospun MnO@C electrodes achieve high specific capacitance of 578 F/g at 1 A/g with an outstanding cycling performance. The electrodes also show 127% capacity increasing after 3000 cycles. An asymmetric supercapacitor composed of activated carbon as the negative electrode and MnO@C as the positive electrode shows an ultrahigh energy density of 35.5 Wh/kg with a power density of 1000 W/kg. The device shows a superior columbic efficiency, cycle life, and capacity retention.

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