Molybdenum nitride nanocrystals anchored on phosphorus-incorporated carbon fabric as a negative electrode for high-performance asymmetric pseudocapacitor

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dc.contributor.authorDubal, D.
dc.contributor.authorAbdel-Azeim, S.
dc.contributor.authorChodankar, N.
dc.contributor.authorHan, Y.
dc.date.issued2019
dc.description.abstractPseudocapacitors hold great promise to provide high energy-storing capacity; however, their capacitances are still far below their theoretical values and they deliver much lower power than the traditional electric double-layer capacitors due to poor ionic accessibility. Here, we have engineered MoN nanoparticles as pseudocapacitive material on phosphorus-incorporated carbon fabric with enhanced ionic affinity and thermodynamic stability. This nanocomposite boosts surface redox kinetics, leading to pseudocapacitance of 400 mF/cm² (2-fold higher than that of molybdenum nitride-based electrodes) with rapid charge-discharge rates. Density functional theory simulations are used to explain the origin of the good performance of MoN@P-CF in proton-based aqueous electrolytes. Finally, an all-pseudocapacitive solid-state asymmetric cell was assembled using MoN@P-CF and RuO₂ (RuO₂@CF) as negative and positive electrodes, respectively, which delivered good energy density with low relaxation time constant (τ₀) of 13 ms (significantly lower than that of carbon-based supercapacitors).
dc.description.statementofresponsibilityDeepak P. Dubal, Safwat Abdel-Azeim, Nilesh R. Chodankar, and Young-Kyu Han
dc.identifier.citationiScience, 2019; 16:50-62
dc.identifier.doi10.1016/j.isci.2019.05.018
dc.identifier.issn2589-0042
dc.identifier.issn2589-0042
dc.identifier.urihttp://hdl.handle.net/2440/123531
dc.language.isoen
dc.publisherElsevier
dc.relation.granthttp://purl.org/au-research/grants/arc/FT180100058
dc.rights© 2019 The Author(s). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
dc.source.urihttps://doi.org/10.1016/j.isci.2019.05.018
dc.subjectMaterials Science
dc.titleMolybdenum nitride nanocrystals anchored on phosphorus-incorporated carbon fabric as a negative electrode for high-performance asymmetric pseudocapacitor
dc.typeJournal article
pubs.publication-statusPublished

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