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231225s2022 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202109870
|2 doi
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|a pubmed24n1121.xml
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|a DE-627
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|e rakwb
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|a eng
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| 100 |
1 |
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|a Cheng, Situo
|e verfasserin
|4 aut
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| 245 |
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|a Selective Center Charge Density Enables Conductive 2D Metal-Organic Frameworks with Exceptionally High Pseudocapacitance and Energy Density for Energy Storage Devices
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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
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|a Date Revised 07.04.2022
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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 Conductive 2D conjugated metal-organic frameworks (c-MOFs) are attractive electrode materials due to their high intrinsic electrical conductivities, large specific surface area, and abundant unsaturated bonds/functional groups. However, the 2D c-MOFs reported so far have limited charge storage capacity during electrochemical charging and discharging, and the energy density is still unsatisfactory. In this work, a strategy of selective center charge density to expand the traditional electrode materials to the electrode-electrolyte coupled system with the prototypical of 2D Co-catecholate (Co-CAT) is proposed. Electrochemical mechanism studies and density functional theory calculations reveal that dual redox sites are achieved with the quinone groups (CAT) and metal-ion linkages (Co-O) serving as the active sites of pseudocapacitive cation (Na+ ) and redox electrolyte species (SO3 2- ). The resultant electrode delivers an exceptionally high capacity of 1160 F g-1 at 1 A g-1 and a special self-discharge rate (86.8% after 48 h). Moreover, the packaged asymmetric device exhibits a state-of-the-art energy density of 158 W h kg-1 at the power density of 2000 W kg-1 and an excellent self-discharge rate of 80.6% after 48 h. This success will provide a new perspective for the performance enhancement for the 2D-MOF-based energy storage devices
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4 |
|a Journal Article
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4 |
|a 2D metal−organic frameworks
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| 650 |
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4 |
|a electrochemical redox sites
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4 |
|a electrode materials
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| 650 |
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4 |
|a energy density
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| 650 |
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4 |
|a self-discharge
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| 700 |
1 |
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|a Gao, Wenzheng
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Cao, Zhen
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yang, Yifan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Xie, Erqing
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Fu, Jiecai
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 34(2022), 14 vom: 02. Apr., Seite e2109870
|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:14
|g day:02
|g month:04
|g pages:e2109870
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| 856 |
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|u http://dx.doi.org/10.1002/adma.202109870
|3 Volltext
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