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

Lin Ling; Wang Kai; Sarkar AbhishekNjel ChristianKarkera GuruprakashWang QingsongAzmi RahelehFichtner MaximilianHahn HorstSchweidler SimonBreitung Ben

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

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

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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 Mossbauer 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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来源
《Advanced energy materials》 |2022年第8期|2103090.1-2103090.11|共11页
作者
Lin Ling; Wang Kai; Sarkar AbhishekNjel ChristianKarkera GuruprakashWang QingsongAzmi RahelehFichtner MaximilianHahn HorstSchweidler SimonBreitung Ben;
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Karlsruhe Inst Technol KIT, Inst Nanotechnol, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany;

Karlsruhe Inst Technol KIT, Inst Nanotechnol, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany|Tech Univ Darmstadt, Joint Res Lab Nanomat, Otto Berndt Str 3, D-64206 Darmstadt, Germany|Karlsruhe Inst Technol, Otto Berndt Str 3, D-6420;

Karlsruhe Inst Technol KIT, Inst Appl Mat IAM, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany|Karlsruhe Inst Technol KIT, Karlsruhe Nano Micro Facil KNMF, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, GermanyHelmholtz Inst Ulm, Helmholtzstr 11, D-89081 Ulm, GermanyKarlsruhe Inst Technol KIT, Inst Nanotechnol, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany|INM Leibniz Inst New Mat, Campus D2 2, D-66123 Saarbrucken, Germany;

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正文语种英语
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high-entropy materials; high-entropy sulfides; lithium batteries; mechanochemical synthesis;

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

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