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High-Entropy Sulfides as Electrode Materials for Li-Ion Batteries

  • Abstract High-entropy sulfides (HESs) containing 5 equiatomic transition metals (M), with different M:S ratios, are prepared by a facile one-step mechanochemical approach. Two new types of single-phase HESs with pyrite (Pa-3) and orthorhombic (Pnma) structures are obtained and demonstrate a homogeneously mixed solid solution. The straightforward synthesis method can easily tune the desired metal to sulfur ratio for HESs with different stoichiometries, by utilizing the respective metal sulfides, even pure metals, and sulfur as precursor chemicals. The structural details and solid solution nature of HESs are studied by X-ray diffraction, transmission electron microscopy, energy-dispersive X-ray spectroscopy, electron energy loss spectroscopy, X-ray photoelectron spectroscopy, inductively coupled plasma optical emission spectroscopy, and Mössbauer spectroscopy. Since transition metal sulfides are a very versatile material class, here the application of HESs is presented as electrode materials for reversible electrochemical energy storage, in which the HESs show high specific capacities and excellent rate capabilities in secondary Li-ion batteries.

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Document Type:Article
Author:Ling LinORCiD, Kai Wang, Abhishek SarkarORCiD, Christian NjelORCiD, Guruprakash KarkeraORCiD, Qingsong WangORCiD, Raheleh AzmiORCiD, Maximilian FichtnerORCiD, Horst HahnORCiD, Simon SchweidlerORCiD, Ben BreitungORCiD
Parent Title (English):Advanced energy materials
First Page:2103090
Year of first Publication:2022
Release Date:2022/05/06
Tag:high-entropy materials; high-entropy sulfides; lithium batteries; mechanochemical synthesis
GND Keyword:Batterie
Impact:29.698 (2021)
Funding Information:China Scholarship Council Deutsche Forschungsgemeinschaft. Grant Number: HA 1344/43-2 Horizon 2020 Framework Programme. Grant Number: 101017709
DDC classes:600 Technik, Medizin, angewandte Wissenschaften / 660 Technische Chemie
Open Access:Open Access
This work was supported by Helmholtz-Zentrum für Infektionsforschung GmbH, European Research Council (ERC starting grant 757913), and Austrian Science Fund (P 31843 and I 4360)
Signature:INM 2022/017
Licence (German):License LogoCreative Commons - CC BY-NC - Namensnennung - Nicht kommerziell 4.0 International