Journal
MATERIALS LETTERS
Volume 215, Issue -, Pages 4-7Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2017.12.053
Keywords
Carbon nanotubes; Nanoparticles; Supercapacitor; Manganese oxide; Composite; Electrode
Funding
- Natural Sciences and Engineering Research Council of Canada
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This paper reports the fabrication of Mn3O4-multiwalled carbon nanotube (MWCNT) electrodes for supercapacitors with a high active mass loading of 35 mg cm(-2), which showed high capacitance of 3.5 F cm(-2), good capacitance retention at high charge-discharge rates and low impedance. Good electro-chemical performance was achieved using non-covalent modification of MWCNT with an anionic steroid dispersant, which allowed excellent MWCNT dispersion and facilitated the fabrication of Mn3O4-MWCNT nanocomposites with uniform distributions of individual components. The electrodes showed activation behavior, related to capacitance increase, impedance reduction and enrichment of the Mn3+ and Mn4+ oxidation states. (C) 2017 Elsevier B.V. All rights reserved.
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