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Carbon onion-sulfur hybrid cathodes for lithium-sulfur batteries

  • In this study, we explore carbon onions (diameter below 10 nm), for the first time, as a substrate material for lithium sulfur cathodes. We introduce several scalable synthesis routes to fabricate carbon onion-sulfur hybrids by adopting in situ and melt diffusion strategies with sulfur fractions up to 68 mass%. The conducting skeleton of agglomerated carbon onions proved to be responsible for keeping active sulfur always in close vicinity to the conducting matrix. Therefore, the hybrids are found to be efficient cathodes for Li-S batteries, yielding 97-98% Coulombic efficiency over 150 cycles with a slow fading of the specific capacity (ca. 660 mA h g-1 after 150 cycles) in long term cycle test and rate capability experiments.

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Document Type:Article
Author:Soumyadip Choudhury, Marco ZeigerORCiD, Pau Massuti-Ballester, Simon FleischmannORCiD, Petr FormanekORCiD, Lars BorchardtORCiD, Volker PresserORCiD
Parent Title (English):Sustainable energy & fuels
First Page:84
Last Page:94
Year of first Publication:2017
Release Date:2022/11/18
Funding Information:German Federal Ministry for Research in support of the nanoEES3D project (award number 03EK3013); Mechanocarb project (award number 03SF0498), both as part of the strategic funding initiative energy storage framework. CREATe-Network Project, Horizon 2020 of the European Commission (RISE Project No. 644013).
Open Access:Open Access
Signature:INM 2017/023
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International