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231226s2023 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202208289
|2 doi
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|a pubmed25n1179.xml
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|a (DE-627)NLM353994693
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|a (NLM)36893768
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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 Shen, Yinlin
|e verfasserin
|4 aut
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|a Anion-Incorporated Mg-Ion Solvation Modulation Enables Fast Magnesium Storage Kinetics of Conversion-Type Cathode Materials
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|c 2023
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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 Completed 11.05.2023
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|a Date Revised 11.05.2023
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2023 Wiley-VCH GmbH.
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|a Rechargeable magnesium batteries (RMB) have emerged as one of the most promising alternatives to lithium-ion batteries due to the prominent advantages of magnesium metal anodes. Nevertheless, their application is hindered by sluggish Mg-ion storage kinetics in cathodes, although various structural modifications of cathode materials have been performed. Herein, an electrolyte design using an anion-incorporated Mg-ion solvation structure is developed to promote the Mg-ion storage reactions of conversion-type cathode materials. The addition of the trifluoromethanesulfonate anion (OTf- ) in the ether-based Mg-ion electrolyte modulates the solvation structure of Mg2+ from [Mg(DME)3 ]2+ to [Mg(DME)2.5 OTf]+ (DME = dimethoxy ethane), which facilitates Mg-ion desolvation and thus significantly expedites the charge transfer of the cathode material. As a result, the as-prepared CuSe cathode material on copper current collector exhibits a considerable increase in magnesium storage capacity from 61% (228 mAh g-1 ) to 95% (357 mAh g-1 ) of the theoretical capacity at 0.1 A g-1 and a more than twofold capacity increase at a high current density of 1.0 A g-1 . This work provides an efficient strategy via electrolyte modulation to achieve high-rate conversion-type cathode materials for RMBs. The incorporation of the trifluoromethanesulfonate anion in the Mg-ion solvation structure of the borate-based Mg-ion electrolyte enables the fast magnesium storage kinetics of the conversion-type cathode materials. The as-prepared copper selenide cathode achieved a more than twofold capacity increase at a high rate and the highest reversible capacities compared to those of the previously reported metal selenide cathodes
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|a Journal Article
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|a anion modulation
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|a cathode materials
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|a copper selenide
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| 650 |
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4 |
|a rechargeable magnesium batteries
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| 650 |
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4 |
|a solvation structure
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| 700 |
1 |
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|a Wang, Yujia
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Miao, Yingchun
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Qiang
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhao, Xiangyu
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Shen, Xiaodong
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 35(2023), 19 vom: 24. Mai, Seite e2208289
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnas
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| 773 |
1 |
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|g volume:35
|g year:2023
|g number:19
|g day:24
|g month:05
|g pages:e2208289
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| 856 |
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|u http://dx.doi.org/10.1002/adma.202208289
|3 Volltext
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