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Entropy Stabilized Medium High Entropy Alloy Anodes for Lithium-Ion Batteries
Department of Physics, Chalmers University of Technology, Chalmersplatsen 4, 412 96, Göteborg, Sweden.ORCID iD: 0000-0003-3735-2133
Institut de Ciència de Materials de Barcelona, ICMAB-CSIC Campus UAB, 08193, Bellaterra, Catalonia, Spain.
Department of Physics, Chalmers University of Technology, Chalmersplatsen 4, 412 96, Göteborg, Sweden.
NOTOS, ALBA Synchrotron, Cerdanyola del Vallès, 08193, Catalonia, Spain.
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2024 (English)In: Batteries & Supercaps, E-ISSN 2566-6223, Vol. 7, no 5, article id e202300585Article in journal (Refereed) Published
Abstract [en]

One often proposed route to improved energy density for lithium-ion batteries is to use alloy anodes, such as silicon, able to store large amounts of lithium. Mechanical instability caused by the large expansion and contraction associated with (de)lithiation, and hence bad cyclability, has, however, so far hindered progress. As proof-of-concept of a remedy, we here present BiSbSe1.5Te1.5, a medium high-entropy alloy with improved cycling stability for conversion-alloying (de)lithiation reactions. We attain five to twenty times more stable cycles than previously reported for comparable metal-Se and -Te-based anodes, with a very good reversible capacity (464 mAh g−1) for up to 110 cycles- and this without using any carbonaceous materials to create a composite. Altogether, this highlights how alloy engineering and increased entropy materials can stabilize conversion-alloying electrodes.

Place, publisher, year, edition, pages
John Wiley & Sons, 2024. Vol. 7, no 5, article id e202300585
Keywords [en]
Conversion-alloy anode, lithium-ion battery, high-entropy alloy, operando X-ray diffraction, metal chalcogenide anode
National Category
Materials Chemistry
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-104622DOI: 10.1002/batt.202300585ISI: 001177781400001Scopus ID: 2-s2.0-85186404353OAI: oai:DiVA.org:ltu-104622DiVA, id: diva2:1845278
Note

Validerad;2024;Nivå 2;2024-05-22 (joosat);

For funding information, see: https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/batt.202300585;

Full text license: CC BY-NC-ND; 

Available from: 2024-03-18 Created: 2024-03-18 Last updated: 2024-05-22Bibliographically approved

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Akhtar, Farid

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