A lithium-sulfur full cell with ultralong cycle life: Influence of cathode structure and polysulfide additive

Thieme S, Brueckner J, Meier A, Bauer I, Gruber K, Kaspar J, Helmer A, Althues H, Schmuck M, Kaskel S (2015)

Publication Type: Journal article

Publication year: 2015

Journal

Journal of Materials Chemistry A Royal Society of Chemistry

Book Volume: 3

Pages Range: 3808-3820

Journal Issue: 7

DOI: 10.1039/c4ta06748g

Abstract

Lithium-sulfur batteries are highly attractive energy storage systems, but suffer from structural anode and cathode degradation, capacity fade and fast cell failure (dry out). To address these issues, a carbide-derived carbon (DUT-107) featuring a high surface area (2088 m² g^-1), high total pore volume (3.17 cm³ g^-1) and hierarchical micro-, meso- and macropore structure is applied as a rigid scaffold for sulfur infiltration. The DUT-107/S cathodes combine excellent mechanical stability and high initial capacities (1098-1208 mA h gS^-1) with high sulfur content (69.7 wt% per total electrode) and loading (2.3-2.9 mgS cm^-2). Derived from the effect of the electrolyte-to-sulfur ratio on capacity retention and cyclability, conducting salt is substituted by polysulfide additive for reduced polysulfide leakage and capacity stabilization. Moreover, in a full cell model system using a prelithiated hard carbon anode, the performance of DUT-107/S cathodes is demonstrated over 4100 cycles (final capacity of 422 mA h gS^-1) with a very low capacity decay of 0.0118% per cycle. Application of PS additive further boosts the performance (final capacity of 554 mA h gS^-1), although a slightly higher decay of 0.0125% per cycle is observed.

Involved external institutions

Fraunhofer-Institut für Werkstoff- und Strahltechnik (IWS) / Fraunhofer Institute for Material and Beam Technology

Germany (DE) Technische Universität Dresden

Germany (DE) VARTA Micro Innovation GmbH

Austria (AT)

How to cite

APA:

Thieme, S., Brueckner, J., Meier, A., Bauer, I., Gruber, K., Kaspar, J.,... Kaskel, S. (2015). A lithium-sulfur full cell with ultralong cycle life: Influence of cathode structure and polysulfide additive. Journal of Materials Chemistry A, 3(7), 3808-3820. https://doi.org/10.1039/c4ta06748g

MLA:

Thieme, Soeren, et al. "A lithium-sulfur full cell with ultralong cycle life: Influence of cathode structure and polysulfide additive." Journal of Materials Chemistry A 3.7 (2015): 3808-3820.

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