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  Biomass-Derived Heteroatom-Doped Carbon Aerogels from a Salt Melt Sol–Gel Synthesis and their Performance in Li–S Batteries

Schipper, F., Vizintin, A., Ren, J., Dominko, R., & Fellinger, T.-P. (2015). Biomass-Derived Heteroatom-Doped Carbon Aerogels from a Salt Melt Sol–Gel Synthesis and their Performance in Li–S Batteries. ChemSusChem, 8, 3077-3083. doi:10.1002/cssc.201500832.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-4B29-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-4F1F-3
Genre: Journal Article

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 Creators:
Schipper, Florian1, Author              
Vizintin, Alen2, Author
Ren, Jiawen3, Author              
Dominko, Robert2, Author
Fellinger, Tim-Patrick4, Author              
Affiliations:
1Helmut Schlaad, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863316              
2external, ou_persistent22              
3Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              
4Tim Fellinger, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863322              

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Free keywords: adsorption, batteries, carbon aerogels, doping, sulfides
 Abstract: An ionothermal sol–gel strategy to synthesize hierarchically porous carbon aerogels doped with different heteroatoms is presented by using biomass precursors in a scalable process. Morphologically similar but chemically different materials are used to study the influence of heteroatoms in Li–S batteries. The materials show capacities as high as 1290 mAh g−1 in the first cycle using 50 wt % S loading. Heteroatom doping reduces the capacity fading and the polarization throughout cycling. Zeta potential measurements reveal positive surface charges for heteroatom-doped carbons and indicate attractive interactions with polysulfides causing reduced fading. A polysulfide-selective sorption study reveals strongly different adsorption behavior depending on the carbon’s chemical composition. Interestingly, the polysulfide fraction is also crucial. The results indicate that improved adsorption of long-chain polysulfides to doped carbons is related to improved capacity retention.

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 Dates: 2015-08-132015
 Publication Status: Published in print
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 Identifiers: DOI: 10.1002/cssc.201500832
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Title: ChemSusChem
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 8 Sequence Number: - Start / End Page: 3077 - 3083 Identifier: ISSN: 1864-5631
CoNE: https://pure.mpg.de/cone/journals/resource/1864-5631