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Type: Journal article
Title: Molybdenum nitride nanocrystals anchored on phosphorus-incorporated carbon fabric as a negative electrode for high-performance asymmetric pseudocapacitor
Author: Dubal, D.
Abdel-Azeim, S.
Chodankar, N.
Han, Y.
Citation: iScience, 2019; 16:50-62
Publisher: Elsevier
Issue Date: 2019
ISSN: 2589-0042
Statement of
Deepak P. Dubal, Safwat Abdel-Azeim, Nilesh R. Chodankar, and Young-Kyu Han
Abstract: Pseudocapacitors 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).
Keywords: Materials Science
Rights: © 2019 The Author(s). This is an open access article under the CC BY-NC-ND license (
DOI: 10.1016/j.isci.2019.05.018
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