Entropy Stabilized Medium High Entropy Alloy Anodes for Lithium-ion Batteries
Journal article, 2024

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.

high-entropy alloy

metal chalcogenide anode

lithium-ion battery

Conversion-alloy anode

operando X-ray diffraction

Author

Sajid Alvi

Chalmers, Physics, Materials Physics

Ashley P. Black

Institute of Material Science of Barcelona (ICMAB)

Ignacio Jozami

Carlos Escudero

ALBA Synchrotron Light Facility

Farid Akhtar

Luleå University of Technology

Patrik Johansson

Alistore - European Research Institute

Chalmers, Physics, Materials Physics

Batteries and Supercaps

25666223 (eISSN)

Vol. 7 5 e202300585

Subject Categories

Materials Chemistry

Condensed Matter Physics

DOI

10.1002/batt.202300585

More information

Latest update

5/18/2024