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231226s2022 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202201510
|2 doi
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|a pubmed24n1128.xml
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|a (DE-627)NLM338687351
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|a DE-627
|b ger
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|a eng
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|a Gao, Siyuan
|e verfasserin
|4 aut
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|a High-Energy and Stable Subfreezing Aqueous Zn-MnO2 Batteries with Selective and Pseudocapacitive Zn-Ion Insertion in MnO2
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|c 2022
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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
|b cr
|2 rdacarrier
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|a Date Revised 26.05.2022
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2022 Wiley-VCH GmbH.
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|a One major challenge of aqueous Zn-MnO2 batteries for practical applications is their unacceptable performance below freezing temperatures. Here the use of simple Zn(ClO4 )2 aqueous electrolytes is described for all-weather Zn-MnO2 batteries even down to -60 °C. The symmetric, bulky ClO4 - anion effectively disrupts hydrogen bonds between water molecules and provides intrinsic ion diffusion even while frozen, and enables ≈260 mAh g-1 on MnO2 cathodes at -30 °C . It is identified that subfreezing cycling shifts the reaction mechanism on the MnO2 cathode from unstable H+ insertion to predominantly pseudocapacitive Zn2+ insertion, which converts MnO2 nanofibers into complicated zincated MnOx that are largely disordered and appeared as crumpled paper sheets. The Zn2+ insertion at -30 °C is faster and much more stable than at 20 °C, and delivers ≈80% capacity retention for 1000 cycles without Mn2+ additives. In addition, simple Zn(ClO4 )2 electrolyte also enables a nearly fully reversible and dendrite-free Zn anode at -30 °C with ≈98% Coulombic efficiency. Zn-MnO2 prototypes with an experimentally verified unit energy density of 148 Wh kg-1 at a negative-to-positive ratio of 1.5 and an electrolyte-to-capacity ratio of 2.0 are further demonstrated
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|a Journal Article
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|a Zn-MnO2 batteries
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|a pseudocapacitive
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|a selective Zn2+ insertion
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| 650 |
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|a subfreezing aqueous batteries
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1 |
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|a Li, Bomin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Tan, Haiyan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Xia, Fan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Dahunsi, Olusola
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Xu, Wenqian
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Liu, Yuzi
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wang, Rongyue
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Cheng, Yingwen
|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 34(2022), 21 vom: 25. Mai, Seite e2201510
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:34
|g year:2022
|g number:21
|g day:25
|g month:05
|g pages:e2201510
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|u http://dx.doi.org/10.1002/adma.202201510
|3 Volltext
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