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Molybdenum Nitride Nanocrystals Anchored on Phosphorus-Incorporated Carbon Fabric as a Negative Electrode for High-Performance Asymmetric Pseudocapacitor

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...

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Autores principales: Dubal, Deepak P., Abdel-Azeim, Safwat, Chodankar, Nilesh R., Han, Young-Kyu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6543162/
https://www.ncbi.nlm.nih.gov/pubmed/31153041
http://dx.doi.org/10.1016/j.isci.2019.05.018
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author Dubal, Deepak P.
Abdel-Azeim, Safwat
Chodankar, Nilesh R.
Han, Young-Kyu
author_facet Dubal, Deepak P.
Abdel-Azeim, Safwat
Chodankar, Nilesh R.
Han, Young-Kyu
author_sort Dubal, Deepak P.
collection PubMed
description 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/cm(2) (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 RuO(2) (RuO(2)@CF) as negative and positive electrodes, respectively, which delivered good energy density with low relaxation time constant (τ(0)) of 13 ms (significantly lower than that of carbon-based supercapacitors).
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spelling pubmed-65431622019-06-04 Molybdenum Nitride Nanocrystals Anchored on Phosphorus-Incorporated Carbon Fabric as a Negative Electrode for High-Performance Asymmetric Pseudocapacitor Dubal, Deepak P. Abdel-Azeim, Safwat Chodankar, Nilesh R. Han, Young-Kyu iScience Article 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/cm(2) (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 RuO(2) (RuO(2)@CF) as negative and positive electrodes, respectively, which delivered good energy density with low relaxation time constant (τ(0)) of 13 ms (significantly lower than that of carbon-based supercapacitors). Elsevier 2019-05-16 /pmc/articles/PMC6543162/ /pubmed/31153041 http://dx.doi.org/10.1016/j.isci.2019.05.018 Text en © 2019 The Author(s) http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Article
Dubal, Deepak P.
Abdel-Azeim, Safwat
Chodankar, Nilesh R.
Han, Young-Kyu
Molybdenum Nitride Nanocrystals Anchored on Phosphorus-Incorporated Carbon Fabric as a Negative Electrode for High-Performance Asymmetric Pseudocapacitor
title Molybdenum Nitride Nanocrystals Anchored on Phosphorus-Incorporated Carbon Fabric as a Negative Electrode for High-Performance Asymmetric Pseudocapacitor
title_full Molybdenum Nitride Nanocrystals Anchored on Phosphorus-Incorporated Carbon Fabric as a Negative Electrode for High-Performance Asymmetric Pseudocapacitor
title_fullStr Molybdenum Nitride Nanocrystals Anchored on Phosphorus-Incorporated Carbon Fabric as a Negative Electrode for High-Performance Asymmetric Pseudocapacitor
title_full_unstemmed Molybdenum Nitride Nanocrystals Anchored on Phosphorus-Incorporated Carbon Fabric as a Negative Electrode for High-Performance Asymmetric Pseudocapacitor
title_short Molybdenum Nitride Nanocrystals Anchored on Phosphorus-Incorporated Carbon Fabric as a Negative Electrode for High-Performance Asymmetric Pseudocapacitor
title_sort molybdenum nitride nanocrystals anchored on phosphorus-incorporated carbon fabric as a negative electrode for high-performance asymmetric pseudocapacitor
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6543162/
https://www.ncbi.nlm.nih.gov/pubmed/31153041
http://dx.doi.org/10.1016/j.isci.2019.05.018
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