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Li-S Batterien

SPAN, a sulfur-containing poly(acrylonitrile)-derived composite material containing up to 55 wt.-% of chemically bound S, is used as cathode material for Li-S batteries. Both fibrous and pellicular structures are employed. The structure of SPAN has been fully elucidated und correlated with the electrochemical performance of Li-S batteries built therefrom. In particular, their discharge / charge chemistry and the role of the electrolyte during cycling are investigated. These investigations entail the electrochemical characterization as well as physico-chemical measurements including WAXS, ESCA, electron microscopy, FT-IR and Raman measurements and MALDI-TOF, to name just a few. Based on that knowledge, Li-S batteries stable for >1200 cycles displaying energy densities up to 2 mA.h/cm2 @ 0.5C have already been realized. In summary, a comprehensive picture of the chemistry and electrochemistry of SPAN-based Li-sulfur batteries is to be created that ultimately allows for designing high-capacity devices with good cycling stability (>1500 cycles) and high energy density (>3.5 mA.h/cm2 @ 1C ).
grafik LiShomepage
Reference:
[1] J. Fanous, M. Wegner, J. Grimminger, Ä. Andresen, M. R. Buchmeiser, Chem. Mater., 23, 2011, 5024-5028.
[2] J. Fanous, M. Wegner, J. Grimminger, M. Rolff, M. B. M. Spera, M. Tenzer and M. R. Buchmeiser, J. Mater. Chem., 22, 2012, 23240-23245.
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[4] J. Fanous, M. Wegner, M. B. M. Spera, M. R. Buchmeiser, J. Electrochem. Soc., 160(8), 2013, A1169-A1170.
[5] M. Frey, R. Zenn, S. Warneke, K. Müller, A. Hintennach, R. E. Dinnebier and M. R. Buchmeiser, ACS Energy Lett., 2, 2017, 595−604.
[6] Fluor-basierte Elektrolyte für Lithium-Schwefel Batterien, M. Frey, M. R. Buchmeiser, A. Hintennach (Daimler AG), DE102016004643.0.
[7] Elektrolyt und elektrochemischer Energiespeicher, S. Warneke, M. R. Buchmeiser, A. Hintennach (Daimler AG), DE102016011782.6.
[8] Kathodenmaterial und Verfahren zu dessen Herstellung (2), M. Frey, M. R. Buchmeiser, A. Hintennach (Daimler AG), Offenlegungsschrift DE 10 2015 00220 A1 (25. 08. 2016).
[9] Kathodenmaterial und Verfahren zu dessen Herstellung (1), M. Frey, M. R. Buchmeiser, A. Hintennach (Daimler AG), DE 102014012468.1.