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Redox-site accessib...
Redox-site accessibility of composites containing a 2D redox-active covalent organic framework : from optimization to application
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- Günther, Tyran (författare)
- Uppsala universitet,Nanoteknologi och funktionella material
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Oka, Kouki (författare)
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- Olsson, Sandra K., 1987- (författare)
- Uppsala universitet,Organisk kemi
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- Åhlén, Michelle (författare)
- Uppsala universitet,Nanoteknologi och funktionella material
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Tohnai, Norimitsu (författare)
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- Emanuelsson, Rikard, Docent, 1984- (författare)
- Uppsala universitet,Organisk kemi
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(creator_code:org_t)
- Royal Society of Chemistry, 2023
- 2023
- Engelska.
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Ingår i: Journal of Materials Chemistry A. - : Royal Society of Chemistry. - 2050-7488 .- 2050-7496. ; 11:26, s. 13923-13931
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Redox-active covalent organic frameworks (RACOFs) can be employed in various functional materials and enesrgy applications. A crucial performance or efficiency indicator is the percentage of redox centres that can be utilised. Herein, the term redox-site accessibility (RSA) is defined and shown to be an effective metric for developing and optimising a 2D RACOF (viz., TpOMe-DAQ made from 2,4,6-trimethoxy-1,3,5-benzenetricarbaldehyde [TpOMe] and 2,6-diaminoanthraquinone [DAQ]) as an anode material for potential organic-battery applications. Pristine TpOMe-DAQ utilises only 0.76% of its redox sites, necessitating the use of conductivity-enhancement strategies such as blending it with different conductive carbons, or performing in situ polymerisation with EDOT (3,4-ethylenedioxythiophene) to form a conductive polymer. While conductive carbon-RACOF composites showed a modest RSA improvement of 4.0%, conductive polymer-RACOF composites boosted the redox-site usage (RSA) to 90% at low mass loadings. The material and electrochemical characteristics of the conductive polymer-RACOF composite containing more-than-necessary conductive polymer showed a reduced surface area but almost identical electrochemical behaviour, compared to the optimal ratio. The high RSA of the optimally loaded composite was replicated in a RACOF-air battery with over 90% active redox sites. We believe that the reported approach and methods, which can be employed on a milligram scale, could serve as a general guide for the electrification and characterisation of RACOFs, as well as for other redox-active porous polymers.
Ämnesord
- NATURVETENSKAP -- Kemi -- Organisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Organic Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- Engineering Science with specialization in Nanotechnology and Functional Materials
- Teknisk fysik med inriktning mot nanoteknologi och funktionella material
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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