Hydrothermally Synthesized SnS2 Anode Materials with Selectively Tuned Crystallinity


Bekzhanov A. Daniyeva N. Jiang Q. Surace Y. Kleitz F. Cupid D.
May 2025John Wiley and Sons Inc

Small Science
2025#5Issue 5

SnS2-based anode active materials for lithium-ion battery applications are synthesized with varying degrees of crystallinity via a hydrothermal method, and their electrochemical performance properties are assessed. Different ratios of tin chloride and thioacetamide precursors are used and studied to control the crystallization. In situ electrochemical impedance spectroscopy and galvanostatic intermittent titration technique experiments are used to study the lithium-ion diffusion kinetics into the crystal structures and the conversion reaction mechanisms for discharge up to x ≈ 2.08 moles of lithiation per SnS2, equivalent to a discharge capacity of 300 mAh g−1. Transmission electron microscopy reveals the presence of amorphous and crystalline domains, as well as the existence of additional Sn2S3 layers on one of the samples. The highest specific reversible capacity during cycling and rate performance are 598 mAh g−1 after 100 cycles and 605 mAh g−1 after rate capability test, which are obtained for the samples prepared with the 1:4 tin chloride to thioacetamide ratio.

anode , diffusion kinetics , hydrothermal method , semicrystalline SnS2 , tin disulfides

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Center for Transport Technologies, Austrian Institute of Technology GmbH, Vienna, 1210, Austria
Department of Functional Materials and Catalysis, Faculty of Chemistry, University of Vienna, Währinger Str. 42, Vienna, 1090, Austria
Vienna Doctoral School in Chemistry (DoSChem), University of Vienna, Währinger Str. 42, Vienna, 1090, Austria
Core Facilities, Nazarbayev University, Astana, 010000, Kazakhstan
Institute of Material Chemistry, Faculty of Chemistry, University of Vienna, Wähinger Strasse 42, Vienna, 1090, Austria

Center for Transport Technologies
Department of Functional Materials and Catalysis
Vienna Doctoral School in Chemistry (DoSChem)
Core Facilities
Institute of Material Chemistry

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