Issue |
E3S Web Conf.
Volume 79, 2019
International Symposium on Architecture Research Frontiers and Ecological Environment (ARFEE 2018)
|
|
---|---|---|
Article Number | 03002 | |
Number of page(s) | 5 | |
Section | Study on Energy Sources and Ecological Environment Engineering | |
DOI | https://doi.org/10.1051/e3sconf/20197903002 | |
Published online | 15 January 2019 |
Synthesis and Characterization of Nickel-doped Manganese Dioxide Electrode Materials for Supercapacitors
School of Materials Science and Engineering, Xi’an University of Science and Technology, Xi’an, China
* Corresponding author: Qinghao Yang@yangxjtu@hotmail.com
Nickel-doped manganese dioxide (Ni-MnO2) synthesized by sol-gel method has been used as an electrode material for supercapacitors. The structure and electrochemical properties of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectrometry (EIS). Results showed that the nickel-doped manganese dioxide sample exhibited irregular particles with the diameter of about 500 nm. The crystallographic structure of MnO2 was the poorly crystallized γ-MnO2. The doping ratio had a great influence on the electrochemical properties of the materials. When the molar ratio of Ni/Mn was 3/100, the specific capacitance of Ni-MnO2 achieved to 252.61 F/g. After 2000 charge/discharge cycles, the specific capacitance of Ni-MnO2 was still maintained at 74.36%, which was attributed to its excellent cycling stability.
© The Authors, published by EDP Sciences, 2019
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.