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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202103736
|2 doi
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|a pubmed24n1106.xml
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|a DE-627
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|a eng
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| 100 |
1 |
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|a Chao, Dongliang
|e verfasserin
|4 aut
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| 245 |
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|a Amorphous VO2
|b A Pseudocapacitive Platform for High-Rate Symmetric Batteries
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Revised 20.05.2022
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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 Among the various VO2 polymorphs, the layered compound, VO2 (B), has been the most widely investigated lithium-ion battery electrode material. For sodium-ion electrodes, however, an amorphous solid may be more advantageous as a result of the open framework to facilitate ion insertion and the ability to tolerate volumetric changes. Herein, it is shown that the Na+ insertion properties of amorphous VO2 (a-VO2 ) are superior to those of crystalline VO2 (B). Amorphous VO2 exhibits a linear voltage characteristic over a 3 V range (4.0 to 1.0 V vs Na/Na+ ) leading to a reversible capacity as high as 400 mAh g-1 and rapid redox kinetics, which is attributed to its pseudocapacitive nature. The linear voltage characteristic over 3 V affords the opportunity of fabricating a symmetric Na-ion battery in which the a-VO2 material serves as both the positive electrode and the negative electrode. Such a symmetric battery offers safer operation in terms of overcharging, overdischarging, polarity reversal, high charge/discharge current abuse, and long-term usage. The results suggest that amorphous transition metal oxides may offer advantageous attributes for rapid, safe, and energy-dense storage
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|a Journal Article
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|a Na-ion battery
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|a amorphous electrode
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|a pseudocapacitive behavior
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|a symmetric battery
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|a vanadium dioxide
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|a DeBlock, Ryan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lai, Chun-Han
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wei, Qiulong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Dunn, Bruce
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Fan, Hong Jin
|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), 49 vom: 07. Dez., Seite e2103736
|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:49
|g day:07
|g month:12
|g pages:e2103736
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|u http://dx.doi.org/10.1002/adma.202103736
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