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High loading CuS-based cathodes for all-solid-state lithium sulfur batteries with enhanced volumetric capacity

Hosseini, Seyed Milad; Varzi, Alberto; Ito, Seitaro; Aihara, Yuichi; Passerini, Stefano

Abstract:
Transition metal sulfides have shown to improve the performance of lithium-sulfur batteries both with liquid and solid electrolytes. In this work, the beneficial effect of copper sulfide for enabling high areal capacity lithiumsulfur all-solid-state batteries is shown. Copper sulfide-carbon (CuSC) and three different copper sulfide-sulfurcarbon (CuSS) composites are investigated as positive electrodes in all-solid-state lithium-sulfur batteries. The composites are prepared via facile and low-cost mechanochemical ball-milling. It is found that the CuS/C ratio greatly influences the redox properties of the CuSC cathode. Scanning electron microscopy, ex-situ X-ray diffraction, and galvanostatic cycling were also conducted to evaluate the CuSS composite electrodes in Li|LiI-Li$_{3}$PS$_{4}$|CuS–S–C solid-state cells. High mass loading cells made using these composite electrodes deliver capacities as high as 1600 mAh g$^{-1}$$_{(CuS+S)}$ and 7 mAh cm$^{-2}$ at 20 °C. The higher density of CuS also leads to larger volumetric capacities, up to 3900 mAh cm$^{-3}$$_{(CuS+S)}$, thus enabling a potential energy density gain up to 15% with respect to a conventional Carbon–Sulfur cathode.

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Verlagsausgabe §
DOI: 10.5445/IR/1000105404
Veröffentlicht am 28.01.2020
Originalveröffentlichung
DOI: 10.1016/j.ensm.2020.01.022
Scopus
Zitationen: 4
Web of Science
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 05.2020
Sprache Englisch
Identifikator ISSN: 2405-8297
KITopen-ID: 1000105404
HGF-Programm 37.01.01 (POF III, LK 01)
Fundamentals and Materials
Erschienen in Energy storage materials
Band 27
Seiten 61–68
Schlagwörter Lithium, sulfur, Copper sulfide, Li/S–CuS, solid-state battery
Nachgewiesen in Web of Science
Scopus
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