UM
Phosphorus-Mediated MoS2 Nanowires as a High-Performance Electrode Material for Quasi-Solid-State Sodium-Ion Intercalation Supercapacitors
Liu S.2; Yin Y.2; Wu M.3; Hui K.S.5; Hui K.N.1; Ouyang C.-Y.3; Jun S.C.2
2019-01-25
Source PublicationSmall
ISSN16136829 16136810
Volume15Issue:4
AbstractMolybdenum disulfide (MoS) is a promising electrode material for electrochemical energy storage owing to its high theoretical specific capacity and fascinating 2D layered structure. However, its sluggish kinetics for ionic diffusion and charge transfer limits its practical applications. Here, a promising strategy is reported for enhancing the Na-ion charge storage kinetics of MoS for supercapacitors. In this strategy, electrical conductivity is enhanced and the diffusion barrier of Na ion is lowered by a facile phosphorus-doping treatment. Density functional theory results reveal that the lowest energy barrier of dilute Na-vacancy diffusion on P-doped MoS (0.11 eV) is considerably lower than that on pure MoS (0.19 eV), thereby signifying a prominent rate performance at high Na intercalation stages upon P-doping. Moreover, the Na-vacancy diffusion coefficient of the P-doped MoS at room temperatures can be enhanced substantially by approximately two orders of magnitude (10–10 cm s) compared with pure MoS. Finally, the quasi-solid-state asymmetrical supercapacitor assembled with P-doped MoS and MnO, as the positive and negative electrode materials, respectively, exhibits an ultrahigh energy density of 67.4 W h kg at 850 W kg and excellent cycling stability with 93.4% capacitance retention after 5000 cycles at 8 A g.
Keywordelectrochemical energy storage first-principles calculations phosphorus-mediated MoS2 quasi-solid-state supercapacitors sodium-ion intercalation
DOI10.1002/smll.201803984
URLView the original
Language英語
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Cited Times [WOS]:24   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Universidade de Macau
2.Yonsei University
3.Jiangxi Normal University
4.Guilin University of Electronic Technology
5.University of East Anglia
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GB/T 7714
Liu S.,Yin Y.,Wu M.,et al. Phosphorus-Mediated MoS2 Nanowires as a High-Performance Electrode Material for Quasi-Solid-State Sodium-Ion Intercalation Supercapacitors[J]. Small,2019,15(4).
APA Liu S..,Yin Y..,Wu M..,Hui K.S..,Hui K.N..,...&Jun S.C..(2019).Phosphorus-Mediated MoS2 Nanowires as a High-Performance Electrode Material for Quasi-Solid-State Sodium-Ion Intercalation Supercapacitors.Small,15(4).
MLA Liu S.,et al."Phosphorus-Mediated MoS2 Nanowires as a High-Performance Electrode Material for Quasi-Solid-State Sodium-Ion Intercalation Supercapacitors".Small 15.4(2019).
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