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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202103846
|2 doi
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|a pubmed24n1100.xml
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|a (DE-627)NLM330061267
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|a (NLM)34463381
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|a DE-627
|b ger
|c DE-627
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|a eng
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|a Zhang, Shipeng
|e verfasserin
|4 aut
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|a Mo2 N-W2 N Heterostructures Embedded in Spherical Carbon Superstructure as Highly Efficient Polysulfide Electrocatalysts for Stable Room-Temperature Na-S Batteries
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 26.10.2021
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2021 Wiley-VCH GmbH.
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|a Room-temperature sodium-sulfur (RT Na-S) batteries are highly desirable for a sustainable large-scale energy-storage system due to their high energy density and low cost. Nevertheless, practical applications of RT Na-S batteries are still prevented by the shuttle effect of sodium polysulfides (NaPS), slow reaction kinetics of S, and incomplete conversion process of NaPS. Here, Mo2 N-W2 N heterostructures embedded in a spherical carbon superstructure (Mo2 N-W2 NPC) are designed to efficiently suppress the "polysulfide shuttle" and promote NaPS redox reactions. The designed Mo2 N-W2 N@PC heterostructure with abundant heterointerfaces, high conductivity, and porosity can facilitate electron/ion diffusion and provide high catalytic activity for efficient NaPS conversion. The obtained Na-S battery delivers high reversible capacity with superior long-term cyclability (517 mAh g-1 at 1 A g-1 after 400 cycles) and unprecedented rate capability (417 mAh g-1 at 2 A g-1 ). Furthermore, the electrocatalysis mechanism is revealed by combining in situ X-ray diffraction (XRD), ex situ X-ray photoelectron spectroscopy (XPS), UV-vis spectra, and precipitation experiments. This work demonstrates a novel heterostructure design strategy that enables high-performance Na-S batteries
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|a Journal Article
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|a Mo2N-W2N heterostructure
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|a S cathodes
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|a electrocatalysis
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|a room-temperature sodium-sulfur batteries
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|a Yao, Yu
|e verfasserin
|4 aut
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|a Jiao, Xiaojuan
|e verfasserin
|4 aut
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|a Ma, Mingze
|e verfasserin
|4 aut
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|a Huang, Huijuan
|e verfasserin
|4 aut
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|a Zhou, Xuefeng
|e verfasserin
|4 aut
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|a Wang, Lifeng
|e verfasserin
|4 aut
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|a Bai, Jintao
|e verfasserin
|4 aut
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| 700 |
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|a Yu, Yan
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 33(2021), 43 vom: 18. Okt., Seite e2103846
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:33
|g year:2021
|g number:43
|g day:18
|g month:10
|g pages:e2103846
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|u http://dx.doi.org/10.1002/adma.202103846
|3 Volltext
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|d 33
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