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231226s2023 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202208096
|2 doi
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|a pubmed24n1161.xml
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|a (DE-627)NLM348553617
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|a (NLM)36341502
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Zhao, Zhongchen
|e verfasserin
|4 aut
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|a Unlock the Potassium Storage Behavior of Single-Phased Tungsten Selenide Nanorods via Large Cation Insertion
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|c 2023
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|a Text
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 03.02.2023
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|a Date Revised 03.02.2023
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2022 Wiley-VCH GmbH.
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|a Metal chalcogenide anodes with a layered structure have been regarded as potential K-based electrochemical energy storage devices with high energy density for large-scale energy storage applications. However, their development is impeded by the slow K-ion transport kinetics and poor structural stability. In this work, the energy-storage behavior is investigated first and decisively associated them with the capacity-degradation of the promising layer-structured WSe2 from an integrated chemical and physical point of view. Then, a single-phased WSe2 with pre-intercalated high K content (SP-Kx WSe2 ) is designed to overcome the capacity-degradation issue fundamentally. Theoretical calculations clarify the beneficial effect of K-ions inside the interlayer of WSe2 on boosting its electrochemical performance, including increasing the electronic conductivity, promoting the K-ion diffusivity, and improving the structural stability. The novel design enables the K-ions pre-intercalated WSe2 anode material to exhibit a high reversible specific capacity of 211 mAh g-1 at 5 A g-1 and superior cycling stability (89.3% capacity retention after 5000 cycles at 1 A g-1 ). Especially, the K-ion hybrid capacitor, assembled from the anode of SP-Kx WSe2 and the cathode of porous activated carbon, delivers superior energy-density up to 175 Wh kg-1 , high power-density as well as exceptional cycling stability
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|a Journal Article
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|a K+ pre-intercalated WSe2
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|a capacity deterioration mechanism
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|a potassium-ion batteries
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|a potassium-ion hybrid capacitor
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|a ultrahigh stability
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|a Xu, Tian
|e verfasserin
|4 aut
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1 |
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|a Yu, Xuebin
|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 35(2023), 5 vom: 18. Feb., Seite e2208096
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:35
|g year:2023
|g number:5
|g day:18
|g month:02
|g pages:e2208096
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|u http://dx.doi.org/10.1002/adma.202208096
|3 Volltext
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