Print Email Facebook Twitter Hollow MoS3 Nanospheres as Electrode Material for “Water-in-Salt” Li–Ion Batteries Title Hollow MoS3 Nanospheres as Electrode Material for “Water-in-Salt” Li–Ion Batteries Author Quan, Ting (Helmholtz-Zentrum Berlin) Xu, Yaolin (Helmholtz-Zentrum Berlin) Tovar, Michael (Helmholtz-Zentrum Berlin) Goubard-Bretesché, Nicolas (Université du Québec) Li, Z. (TU Delft RST/Storage of Electrochemical Energy) Kochovski, Zdravko (Helmholtz-Zentrum Berlin) Kirmse, Holm (Humboldt-Universitat zu Berlin) Skrodczky, Kai (Humboldt-Universitat zu Berlin) Wagemaker, M. (TU Delft RST/Storage of Electrochemical Energy) Date 2020 Abstract The use of “water-in-salt” electrolyte (WISE) (i. e., a highly concentrated aqueous solution) in rechargeable batteries has received increasing attention due to the significantly expanded electrochemical window compared to the limited voltage of conventional aqueous electrolytes. It enables the use of more positive/negative electrode material couples in aqueous batteries, resulting in an enhanced output voltage. However, one of the challenges is to identify promising anode materials for the “water-in-salt” Li-ion batteries (WIS-LIBs). Herein we for the first time demonstrate that MoS3, an amorphous chain-like structured transitional metal trichalcogenide, is promising as anode in the WIS-LIBs. In this work, hollow MoS3 nanospheres were synthesized via a scalable room-temperature acid precipitation method. When applied in WIS-LIBs, the prepared MoS3 achieved a high specific capacity of 127 mAh/g at the current density of 0.1 A/g and good stability over 1000 cycles. During operation, MoS3 underwent irreversible conversion to Li2MoO4 (with H2S and H2 evolution) during the initial Li ion uptake, and was then converted gradually to a more stable and reversible LixMoOy (2≤y≤4)) phase along cycling. Amorphous Li-deficient Lix-mMoOy/MoOz was formed upon delithiation. Nevertheless, MoS3 outperformed MoO3 in WIS-LIBs, which could be accredited to its initial one-dimensional molecular structure and the amorphous nature of the delithiated product facilitating charge transport. These results demonstrated a novel routine for synthesizing metal sulfides with hollow structures using a template-based method and push forward the development of metal sulfides for aqueous energy storage applications. Subject hollow nanostructureLi-ion batteriesMoS“water-in-salt” electrolyte (WISE) To reference this document use: http://resolver.tudelft.nl/uuid:78da7563-7d02-4125-a3c1-4b1e32a045e0 DOI https://doi.org/10.1002/batt.202000042 Source Batteries and Supercaps, 3 (8), 747-756 Part of collection Institutional Repository Document type journal article Rights © 2020 Ting Quan, Yaolin Xu, Michael Tovar, Nicolas Goubard-Bretesché, Z. Li, Zdravko Kochovski, Holm Kirmse, Kai Skrodczky, M. Wagemaker, More Authors Files PDF Batteries_Supercaps_2020_ ... teries.pdf 1.54 MB Close viewer /islandora/object/uuid:78da7563-7d02-4125-a3c1-4b1e32a045e0/datastream/OBJ/view