bei Google ScholarTitelangaben
Wang, Kai ; Hua, Weibo ; Huang, Xiaohui ; Stenzel, David ; Wang, Junbo ; Ding, Ziming ; Cui, Yanyan ; Wang, Qingsong ; Ehrenberg, Helmut ; Breitung, Ben ; Kübel, Christian ; Mu, Xiaoke:
Synergy of cations in high entropy oxide lithium ion battery anode.
In: Nature Communications.
Bd. 14
(2023)
Heft 1
.
- 1487.
ISSN 2041-1723
DOI: https://doi.org/10.1038/s41467-023-37034-6
Abstract
High entropy oxides (HEOs) with chemically disordered multi-cation structure attract intensive interest as negative electrode materials for battery applications. The outstanding electrochemical performance has been attributed to the high-entropy stabilization and the so-called ‘cocktail effect’. However, the configurational entropy of the HEO, which is thermodynamically only metastable at room-temperature, is insufficient to drive the structural reversibility during conversion-type battery reaction, and the ‘cocktail effect’ has not been explained thus far. This work unveils the multi-cations synergy of the HEO Mg0.2Co0.2Ni0.2Cu0.2Zn0.2O at atomic and nanoscale during electrochemical reaction and explains the ‘cocktail effect’. The more electronegative elements form an electrochemically inert 3-dimensional metallic nano-network enabling electron transport. The electrochemical inactive cation stabilizes an oxide nanophase, which is semi-coherent with the metallic phase and accommodates Li+ ions. This self-assembled nanostructure enables stable cycling of micron-sized particles, which bypasses the need for nanoscale pre-modification required for conventional metal oxides in battery applications. This demonstrates elemental diversity is the key for optimizing multi-cation electrode materials.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie Forschungseinrichtungen > Zentrale wissenschaftliche Einrichtungen > Bayerisches Zentrum für Batterietechnik - BayBatt |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 500 Naturwissenschaften 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Eingestellt am: | 24 Nov 2023 09:35 |
| Letzte Änderung: | 24 Nov 2023 09:35 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/87849 |