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Hybrid Li/S Battery Based on Dimethyl Trisulfide and Sulfurized Poly(acrylonitrile)

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Müller,  K.
Scientific Facility Interface Analysis (Ulrich Starke), Max Planck Institute for Solid State Research, Max Planck Society;

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Starke,  U.
Scientific Facility Interface Analysis (Ulrich Starke), Max Planck Institute for Solid State Research, Max Planck Society;

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Dinnebier,  R. E.
Scientific Facility X-Ray Diffraction (Robert E. Dinnebier), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Warneke, S., Zenn, R., Lebherz, T., Müller, K., Hintennach, A., Starke, U., et al. (2018). Hybrid Li/S Battery Based on Dimethyl Trisulfide and Sulfurized Poly(acrylonitrile). Advanced Sustainable Systems, 2(2): UNSP 1700144.


Cite as: https://hdl.handle.net/21.11116/0000-000E-E075-1
Abstract
Lithium-sulfur (Li/S) batteries are among the most promising next-generation energy storage systems because of their high theoretical specific energy of approximate to 2600 Wh kg(-1). However, conventional Li/S batteries require high amounts of redox-inactive liquid electrolytes, which do not contribute to cell capacity. Thus, the practical specific energy of Li/S batteries is often relatively poor (<500 Wh kg(-1)) and barely competitive with Li-ion batteries. Herein, a new hybrid Li/S battery that contains both a liquid and a solid cathode, i.e., dimethyl trisulfide (DMTS) and fibrous sulfurized poly(acrylonitrile) (SPAN) as active materials is presented. These Li/DMTS/SPAN cells exhibit high capacity (formally up to 7100 mA h g(sulfur of cathode)(-1)), high areal capacity up to 4.3 mA h cm(-2), high rate capability up to 8 C, and excellent cycle stability (>700 cycles). In addition, both the working and aging mechanism are elucidated by NMR, Raman, X-ray photoelectron and electronic impedance spectroscopy, X-ray powder diffraction, cyclic voltammetry, and postmortem analysis.