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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202002908
|2 doi
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|a pubmed24n1056.xml
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|a (DE-627)NLM317036726
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|a (NLM)33135265
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|a DE-627
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|a eng
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|a Liu, Pengcheng
|e verfasserin
|4 aut
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|a Stable Potassium Metal Anodes with an All-Aluminum Current Collector through Improved Electrolyte Wetting
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|c 2020
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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 Revised 22.02.2021
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2020 Wiley-VCH GmbH.
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|a This is the first report of successful potassium metal battery anode cycling with an aluminum-based rather than copper-based current collector. Dendrite-free plating/stripping is achieved through improved electrolyte wetting, employing an aluminum-powder-coated aluminum foil "AlAl," without any modification of the support surface chemistry or electrolyte additives. The reservoir-free Al@Al half-cell is stable at 1000 cycles (1950 h) at 0.5 mA cm-2 , with 98.9% cycling Coulombic efficiency and 0.085 V overpotential. The pre-potassiated cell is stable through a wide current range, including 130 cycles (2600 min) at 3.0 mA cm-2 , with 0.178 V overpotential. Al@Al is fully wetted by a 4 m potassium bis(fluorosulfonyl)imide-dimethoxyethane electrolyte (θCA = 0°), producing a uniform solid electrolyte interphase (SEI) during the initial galvanostatic formation cycles. On planar aluminum foil with a nearly identical surface oxide, the electrolyte wets poorly (θCA = 52°). This correlates with coarse irregular SEI clumps at formation, 3D potassium islands with further SEI coarsening during plating/stripping, possibly dead potassium metal on stripped surfaces, and rapid failure. The electrochemical stability of Al@Al versus planar Al is not related to differences in potassiophilicity (nearly identical) as obtained from thermal wetting experiments. Planar Cu foils are also poorly electrolyte-wetted and become dendritic. The key fundamental takeaway is that the incomplete electrolyte wetting of collectors results in early onset of SEI instability and dendrites
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|a Journal Article
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|a lithium metal batteries
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|a lithium-sulfur batteries
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|a potassium-ion batteries
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|a potassium-sulfur batteries
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4 |
|a sodium metal batteries
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|a Wang, Yixian
|e verfasserin
|4 aut
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1 |
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|a Hao, Hongchang
|e verfasserin
|4 aut
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1 |
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|a Basu, Swastik
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Feng, Xuyong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Xu, Yixin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Boscoboinik, Jorge Anibal
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Nanda, Jagjit
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Watt, John
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Mitlin, David
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 32(2020), 49 vom: 30. Dez., Seite e2002908
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:32
|g year:2020
|g number:49
|g day:30
|g month:12
|g pages:e2002908
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|u http://dx.doi.org/10.1002/adma.202002908
|3 Volltext
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