The Role of Carbon Electrodes Pore Size Distribution on the Formation of the Cathode–Electrolyte Interphase in Lithium–Sulfur Batteries
Kensy C, Leistenschneider D, Wang S, Tanaka H, Doerfler S, Kaneko K, Kaskel S (2021)
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 4
Pages Range: 612-622
Journal Issue: 4
Abstract
The use of sulfur is advantageous in next generation lithium batteries replacing scarce metals and leading to enhanced specific energy compared to established energy storage devices. Herein, the utilization of microporous (d<2 nm) carbon/sulfur composites using a carbonate-based electrolyte is studied to obtain more insights into the formation of a solid-electrolyte interphase (SEI) layer on the cathode surface (cathode-electrolyte interphase, CEI) in Li-S cells. The sulfur was confined in model carbide-derived carbon (CDC) system with uniform micropores as well as in commercial microporous activated carbon materials. The molecular structure of sulfur in the pores is characterized by means of EXAFS spectroscopy. The electrochemical evaluation of confined sulfur cathodes revealed quasi solid-state transformation mechanism as well as the generation of a protective SEI layer on the cathode surface. This cathode-electrolyte interphase (CEI) allows common microporous carbon/sulfur cathodes to reversibly cycle in carbonate-based electrolyte, while mesoporous systems show rapid capacity fade due to permeable CEIs. Based on this result, the influence of the porosity of the porous carbon host materials on the essential cathodic SEI layer formation is discussed for carbonate-based electrolytes in Li-S batteries.
Involved external institutions
Technische Universität Dresden
Germany (DE)
University of Alberta
Canada (CA)
Shinshu University / 信州大学
Japan (JP)
Fraunhofer-Institut für Werkstoff- und Strahltechnik (IWS) / Fraunhofer Institute for Material and Beam Technology
Germany (DE)
Germany (DE)
University of Alberta
Canada (CA)
Shinshu University / 信州大学
Japan (JP)
Fraunhofer-Institut für Werkstoff- und Strahltechnik (IWS) / Fraunhofer Institute for Material and Beam Technology
Germany (DE)
How to cite
APA:
Kensy, C., Leistenschneider, D., Wang, S., Tanaka, H., Doerfler, S., Kaneko, K., & Kaskel, S. (2021). The Role of Carbon Electrodes Pore Size Distribution on the Formation of the Cathode–Electrolyte Interphase in Lithium–Sulfur Batteries. Batteries & Supercaps, 4(4), 612-622. https://doi.org/10.1002/batt.202000195
MLA:
Kensy, Christian, et al. "The Role of Carbon Electrodes Pore Size Distribution on the Formation of the Cathode–Electrolyte Interphase in Lithium–Sulfur Batteries." Batteries & Supercaps 4.4 (2021): 612-622.
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