Nitronyl nitroxide-based redox mediators for Li-O<inf>2</inf> batteries

McDonagh, AM; Tkacheva, A; Sun, B; Zhang, J; Wang, G

Nitronyl nitroxide-based redox mediators for Li-O<inf>2</inf> batteries

McDonagh, AM Tkacheva, A Sun, B

Zhang, J

Wang, G

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Publisher:: American Chemical Society
Publication Type:: Journal Article
Citation:: The Journal of Physical Chemistry C: Energy Conversion and Storage, Optical and Electronic Devices, Interfaces, Nanomaterials, and Hard Matter, 2021, 125, (5), pp. 2824-2830
Issue Date:: 2021-02-11

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Field	Value	Language
dc.contributor.author	McDonagh, AM
dc.contributor.author	Tkacheva, A
dc.contributor.author	Sun, B https://orcid.org/0000-0002-4365-486X
dc.contributor.author	Zhang, J https://orcid.org/0000-0001-5476-0134
dc.contributor.author	Wang, G https://orcid.org/0000-0003-4295-8578
dc.date.accessioned	2022-02-08T05:48:35Z
dc.date.available	2022-02-08T05:48:35Z
dc.date.issued	2021-02-11
dc.identifier.citation	The Journal of Physical Chemistry C: Energy Conversion and Storage, Optical and Electronic Devices, Interfaces, Nanomaterials, and Hard Matter, 2021, 125, (5), pp. 2824-2830
dc.identifier.issn	1932-7447
dc.identifier.issn	1932-7455
dc.identifier.uri	http://hdl.handle.net/10453/154292
dc.description.abstract	Electrochemical processes in Li-O2 batteries benefit from the action of soluble electrocatalysts (redox mediators, RMs) that can facilitate charge or discharge reactions and minimize the blockage of the cathode with the insoluble discharge product Li2O2. In this work, 2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide (PTIO) analogues (RPTIOs) as new redox mediators for Li-O2 batteries have been investigated. Cyclic voltammetry, scanning electron microscopy, X-ray diffraction studies, and the galvanostatic cycling of the Li-O2 batteries showed that the RPTIOs could effectively catalyze the charge process while having a low impact on the discharge reaction. A direct connection was observed between the character of the substituent on the 2-position of the imidazoline ring, the oxidation redox potential of the RPTIO, and the value of the charge voltage of the battery with this RM, paving a path for further optimization.
dc.language	English
dc.publisher	American Chemical Society
dc.relation	http://purl.org/au-research/grants/arc/DP160104340
dc.relation.ispartof	The Journal of Physical Chemistry C: Energy Conversion and Storage, Optical and Electronic Devices, Interfaces, Nanomaterials, and Hard Matter
dc.relation.isbasedon	10.1021/acs.jpcc.0c08466
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject	03 Chemical Sciences, 09 Engineering, 10 Technology
dc.subject.classification	Physical Chemistry
dc.title	Nitronyl nitroxide-based redox mediators for Li-O<inf>2</inf> batteries
dc.type	Journal Article
utslib.citation.volume	125
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
utslib.for	10 Technology
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - CCET - Centre for Clean Energy Technology
utslib.copyright.status	open_access	*
pubs.consider-herdc	false
utslib.copyright.embargo	2022-02-28T00:00:00+1000Z
dc.date.updated	2022-02-08T05:48:33Z
pubs.issue	5
pubs.publication-status	Published
pubs.volume	125
utslib.citation.issue	5

Abstract:

Electrochemical processes in Li-O2 batteries benefit from the action of soluble electrocatalysts (redox mediators, RMs) that can facilitate charge or discharge reactions and minimize the blockage of the cathode with the insoluble discharge product Li2O2. In this work, 2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide (PTIO) analogues (RPTIOs) as new redox mediators for Li-O2 batteries have been investigated. Cyclic voltammetry, scanning electron microscopy, X-ray diffraction studies, and the galvanostatic cycling of the Li-O2 batteries showed that the RPTIOs could effectively catalyze the charge process while having a low impact on the discharge reaction. A direct connection was observed between the character of the substituent on the 2-position of the imidazoline ring, the oxidation redox potential of the RPTIO, and the value of the charge voltage of the battery with this RM, paving a path for further optimization.

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http://hdl.handle.net/10453/154292