Universität zu Köln

Nojabaee, Maryam, Sievert, Brigitta ORCID: 0000-0002-0860-842X, Schwan, Marina, Schettler, Jessica, Warth, Frieder, Wagner, Norbert ORCID: 0000-0002-2596-8689, Milow, Barbara and Friedrich, K. Andreas ORCID: 0000-0002-2968-5029 (2021). Ultramicroporous carbon aerogels encapsulating sulfur as the cathode for lithium-sulfur batteries. J. Mater. Chem. A, 9 (10). S. 6508 - 6520. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 2050-7496

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Abstract

Highly porous carbon materials employed in sulfur cathodes are of utmost importance to the charge transport, conductivity and stability of the cathode in metal-sulfur batteries. Herein, ultramicroporous carbon aerogels as conductive matrices embedding sulfur for cathode application in lithium-sulfur batteries are synthesized and investigated. Resulting from organic resorcinol-formaldehyde aerogels, the synthesized carbon aerogels feature a highly porous structure with a surface area of 500-2000 m(2) g(-1) and large micropore volume up to 0.6 cm(3) g(-1). The effective gas-phase sulfur infiltration of the carbon aerogels and the resulting confinement of sulfur in the micropores are demonstrated. It is indicated that sulfur-infiltrated microporous carbon aerogel cathodes are able to suppress the polysulfide shuttle effect, maintaining 80% (>= 1000 mA h g((S))(-1)) and 70% (>= 800 mA h g((S))(-1)) of the initial discharge capacity after 200 cycles at a rate of 0.3C in carbonate and ether-based electrolytes, respectively. Remarkably, the herein prepared composite cathode can still deliver a discharge capacity of at least 700 mA h g((S))(-1) at a faster rate of 2C in both electrolyte systems. The cyclability and compatibility of the ether and carbonate-based electrolytes with such a composite cathode are discussed elaborately.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Nojabaee, Maryam UNSPECIFIED UNSPECIFIED UNSPECIFIED Sievert, Brigitta UNSPECIFIED orcid.org/0000-0002-0860-842X UNSPECIFIED Schwan, Marina UNSPECIFIED UNSPECIFIED UNSPECIFIED Schettler, Jessica UNSPECIFIED UNSPECIFIED UNSPECIFIED Warth, Frieder UNSPECIFIED UNSPECIFIED UNSPECIFIED Wagner, Norbert UNSPECIFIED orcid.org/0000-0002-2596-8689 UNSPECIFIED Milow, Barbara UNSPECIFIED UNSPECIFIED UNSPECIFIED Friedrich, K. Andreas UNSPECIFIED orcid.org/0000-0002-2968-5029 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-583538
DOI:	10.1039/d0ta11332h
Journal or Publication Title:	J. Mater. Chem. A
Volume:	9
Number:	10
Page Range:	S. 6508 - 6520
Date:	2021
Publisher:	ROYAL SOC CHEMISTRY
Place of Publication:	CAMBRIDGE
ISSN:	2050-7496
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/58353