Mechanistic Insights into the Role of Covalent Triazine Frameworks as Cathodes in Lithium-Sulfur Batteries

Troschke E, Kensy C, Haase F, Doerfler S, Joseph Y, Lotsch BV, Kaskel S (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Batteries & Supercaps Wiley-VCH Verlag

Book Volume: 3

Pages Range: 1069-1079

Journal Issue: 10

DOI: 10.1002/batt.202000063

Abstract

This study illuminates the applicability of covalent triazine frameworks (CTFs) as a potential cathode material in lithium-sulfur (Li−S) batteries. A systematic synthesis protocol is applied to generate a set of model CTFs containing covalently bound sulfur with varying porosities and conductivities. An in-depth structural characterization reconsiders the bonding motif of sulfur within the pore system. The model materials are electrochemically evaluated in coin cells. The CTF cathodes exhibit practically no cycling performance as a result of active material loss in carbonate-based electrolyte (≥200 mAh gsulfur−1 after 200 cycles). Moreover, in ether-based electrolytes the differentiation between sulfur transformation on the surface of the conductive additive and the (semi-)conducting CTF matrix is hardly feasible. Based on these results, the influence of the CTF material and the conductive additive with respect to sulfur utilization are discussed, demonstrating the critical role of this class of materials for application in Li−S batteries.

Involved external institutions

Technische Universität Dresden DE Germany (DE) Fraunhofer-Institut für Werkstoff- und Strahltechnik (IWS) / Fraunhofer Institute for Material and Beam Technology DE Germany (DE) Max-Planck-Institut für Festkörperforschung DE Germany (DE) Technische Universität Bergakademie Freiberg DE Germany (DE)

How to cite

APA:

Troschke, E., Kensy, C., Haase, F., Doerfler, S., Joseph, Y., Lotsch, B.V., & Kaskel, S. (2020). Mechanistic Insights into the Role of Covalent Triazine Frameworks as Cathodes in Lithium-Sulfur Batteries. Batteries & Supercaps, 3(10), 1069-1079. https://doi.org/10.1002/batt.202000063

MLA:

Troschke, Erik, et al. "Mechanistic Insights into the Role of Covalent Triazine Frameworks as Cathodes in Lithium-Sulfur Batteries." Batteries & Supercaps 3.10 (2020): 1069-1079.

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