The Importance of Pore Size and Surface Polarity for Polysulfide Adsorption in Lithium Sulfur Batteries

Hippauf F, Nickel W, Hao GP, Schwedtmann K, Giebeler L, Oswald S, Borchardt L, Doerfler S, Weigand JJ, Kaskel S (2016)

Publication Type: Journal article

Publication year: 2016

Journal

Advanced Materials Interfaces WILEY-VCH Verlag GmbH & Co. KGaA

Book Volume: 3

Article Number: 1600508

Journal Issue: 18

DOI: 10.1002/admi.201600508

Abstract

Polysulfide shuttling is a crucial factor in lithium sulfur batteries responsible for capacity fading and degradation. Liquid phase adsorption in combination with nuclear magnetic resonance and X-ray photoelectron spectroscopy are used to elucidate and quantify polysulfide retention in typical porous cathode materials used in lithium sulfur batteries without cell assembly to achieve a more fundamental understanding of liquid phase adsorption phenomena as a responsible mechanism for polysulfide retention. The individual impact of each pore size increment is quantified on the polysulfide adsorption (PSA). Ultramicropores show eight times higher PSA (1.48 mmol cm−3) than mesopores. Strong heteroatom-doped ultramicropores show even stronger interactions with polysulfides leading to 25 times higher adsorption compared to hydrophobic mesopores. These findings allow to precisely tailor pore structure and heteroatom distribution of cathode materials for next generation lithium sulfur batteries with prolonged cycle life and reduced capacity fading.

Involved external institutions

Technische Universität Dresden DE Germany (DE) Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden DE Germany (DE) Fraunhofer-Institut für Werkstoff- und Strahltechnik (IWS) / Fraunhofer Institute for Material and Beam Technology DE Germany (DE)

How to cite

APA:

Hippauf, F., Nickel, W., Hao, G.-P., Schwedtmann, K., Giebeler, L., Oswald, S.,... Kaskel, S. (2016). The Importance of Pore Size and Surface Polarity for Polysulfide Adsorption in Lithium Sulfur Batteries. Advanced Materials Interfaces, 3(18). https://doi.org/10.1002/admi.201600508

MLA:

Hippauf, Felix, et al. "The Importance of Pore Size and Surface Polarity for Polysulfide Adsorption in Lithium Sulfur Batteries." Advanced Materials Interfaces 3.18 (2016).

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