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https://hdl.handle.net/2440/117916
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dc.contributor.author | Dubal, D. | - |
dc.contributor.author | Chodankar, N. | - |
dc.contributor.author | Qiao, S. | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | Small, 2019; 15(1):1-9 | - |
dc.identifier.issn | 1613-6810 | - |
dc.identifier.issn | 1613-6829 | - |
dc.identifier.uri | http://hdl.handle.net/2440/117916 | - |
dc.description.abstract | Owing to the excellent physical properties of metal nitrides such as metallic conductivity and pseudocapacitance, they have recently attracted much attention as competitive materials for high-performance supercapacitors (SCs). However, the voltage window for metal nitride-based symmetric SCs is limited (0.6-0.8 V) in aqueous electrolyte due to the oxidation at high negative potentials. In this respect, ultra-small tungsten nitride particles onto the phosphorous modified carbon fabric (W₂N@P-CF) are engineered as a promising hybrid electrode for pseudocapacitors. Additionally, the fact that the W₂N@P-CF electrode can operate in the negative potential region is exploited to design asymmetric pseudocapacitors by coupling with a polypyrrole on carbon fabric (PPy@CF) as the positive electrode. Remarkably, the W₂N@P-CF//PPy@CF asymmetric cell can be cycled in a wide voltage window of 1.6 V that is almost two times higher than that of metal nitrides symmetric SCs. The pseudocapacitive behavior with matching different potential regions of W₂N@P-CF and PPy@CF, considerably enhance performance of asymmetric device. The device delivers high volumetric capacity (7.1 F cm⁻³), high energy (2.54 mWh cm⁻³ ), power densities, and good cycling stability (88%) over 20 000 cycles. Thus, pseudocapacitive metal nitride-based devices hold a great promise to provide high voltage and improved energy density in aqueous electrolyte. | - |
dc.description.statementofresponsibility | Deepak P. Dubal, Nilesh R. Chodankar, and Shizhang Qiao | - |
dc.language.iso | en | - |
dc.publisher | Wiley | - |
dc.rights | © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim | - |
dc.source.uri | http://dx.doi.org/10.1002/smll.201804104 | - |
dc.subject | Asymmetric pseudocapacitors; flexible supercapacitors; high energy density; metal nitrides | - |
dc.title | Tungsten nitride nanodots embedded phosphorous modified carbon fabric as flexible and robust electrode for asymmetric pseudocapacitor | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1002/smll.201804104 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/FT180100058 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Qiao, S. [0000-0002-1220-1761] [0000-0002-4568-8422] | - |
Appears in Collections: | Aurora harvest 8 Chemical Engineering publications |
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