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
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 | ||||||||||||||||||||||||||||||||||||
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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: |
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URI: | http://kups.ub.uni-koeln.de/id/eprint/58353 |
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