Scalable production of nitrogen-doped carbons for multilayer lithium-sulfur battery cells

Kensy C, Haertel P, Maschita J, Doerfler S, Schumm B, Abendroth T, Althues H, Lotsch B, Kaskel S (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Carbon Elsevier

Book Volume: 161

Pages Range: 190-197

DOI: 10.1016/j.carbon.2020.01.037

Abstract

Lithium-sulfur (Li–S) batteries are among the targeted candidates for future generation secondary batteries with high specific energy. Herein, a scalable synthesis is presented to produce highly porous, nitrogen-doped carbons from a commercial carbon black material by melamine impregnation and subsequent thermolysis. The process up-scaling up was demonstrated at > 100 g batch level. The nitrogen doping was controlled through pyrolysis temperatures and carbon to melamine ratio. The sulfur-carbon cathodes exhibit an enhanced cycle life at a moderate electrolyte to sulfur ratio of 7 μL mgS −1. In particular, under lean conditions at low electrolyte amount of 5 μL mgS −1, the nitrogen functionalities improved active material utilization and capacity retention significantly. The nitrogen-doped scaffold was integrated into five-layered prototype cell (71 × 46 mm2) with a capacity of up to 0.87 Ah reaching a specific energy density of 238 Wh kg−1 on stack level. These results provide new insights into realistic application of nitrogen-doped carbons on pouch cell level.

Involved external institutions

Max-Planck-Institut für Festkörperforschung DE Germany (DE) Technische Universität 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:

Kensy, C., Haertel, P., Maschita, J., Doerfler, S., Schumm, B., Abendroth, T.,... Kaskel, S. (2020). Scalable production of nitrogen-doped carbons for multilayer lithium-sulfur battery cells. Carbon, 161, 190-197. https://doi.org/10.1016/j.carbon.2020.01.037

MLA:

Kensy, Christian, et al. "Scalable production of nitrogen-doped carbons for multilayer lithium-sulfur battery cells." Carbon 161 (2020): 190-197.

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