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Moździerz M, Świerczek K, Dąbrowa J, Gajewska M, Hanc A, Feng Z, Cieślak J, Kądziołka-Gaweł M, Płotek J, Marzec M, Kulka A. High-Entropy Sn 0.8(Co 0.2Mg 0.2Mn 0.2Ni 0.2Zn 0.2) 2.2O 4 Conversion-Alloying Anode Material for Li-Ion Cells: Altered Lithium Storage Mechanism, Activation of Mg, and Origins of the Improved Cycling Stability. ACS Appl Mater Interfaces 2022; 14:42057-42070. [PMID: 36094407 PMCID: PMC9501916 DOI: 10.1021/acsami.2c11038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 08/31/2022] [Indexed: 06/15/2023]
Abstract
Benefits emerging from applying high-entropy ceramics in Li-ion technology are already well-documented in a growing number of papers. However, an intriguing question may be formulated: how can the multicomponent solid solution-type material ensure stable electrochemical performance? Utilizing an example of nonequimolar Sn-based Sn0.8(Co0.2Mg0.2Mn0.2Ni0.2Zn0.2)2.2O4 high-entropy spinel oxide, we provide a comprehensive model explaining the observed very good cyclability. The material exhibits a high specific capacity above 600 mAh g-1 under a specific current of 50 mA g-1 and excellent capacity retention near 100% after 500 cycles under 200 mA g-1. The stability originates from the conversion-alloying reversible reactivity of the amorphous matrix, which forms during the first lithiation from the initial high-entropy structure, and preserves the high level of cation disorder at the atomic scale. In the altered Li-storage mechanism in relation to the simple oxides, the unwanted aggregated metallic grains are not exsolved from the anode and therefore do not form highly lithiated phases characterized by large volumetric changes. Also, the electrochemical activity of Mg from the oxide matrix can be clearly observed. Because the studied compound was prepared by a conventional solid-state route, implementation of the presented approach is facile and appears usable for any oxide anode material containing a high-entropy mixture of elements.
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Affiliation(s)
- Maciej Moździerz
- Faculty
of Energy and Fuels, AGH University of Science
and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
| | - Konrad Świerczek
- Faculty
of Energy and Fuels, AGH University of Science
and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
- AGH
Centre of Energy, AGH University of Science
and Technology, ul. Czarnowiejska 36, 30-054 Krakow, Poland
| | - Juliusz Dąbrowa
- Faculty
of Materials Science and Ceramics, AGH University
of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
| | - Marta Gajewska
- Academic
Centre for Materials and Nanotechnology, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
| | - Anna Hanc
- Faculty
of Energy and Fuels, AGH University of Science
and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
| | - Zhenhe Feng
- State
Key Laboratory of Space Power-Sources Technology, Shanghai Institute of Space Power-Sources, No. 2965 Dongchuan Road, Shanghai 200245, China
| | - Jakub Cieślak
- Faculty of
Physics and Applied Computer Science, AGH
University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
| | - Mariola Kądziołka-Gaweł
- Institute
of Physics, University of Silesia, ul. 75 Pułku Piechoty 1, 41-500 Chorzow, Poland
| | - Justyna Płotek
- Faculty
of Energy and Fuels, AGH University of Science
and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
| | - Mateusz Marzec
- Academic
Centre for Materials and Nanotechnology, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
| | - Andrzej Kulka
- Faculty
of Energy and Fuels, AGH University of Science
and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
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Płotek J, Kulka A, Moździerz M, Molenda J. Structural changes during the sodiation of branch-like antimony-based anodes for Na-ion batteries. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322092464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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