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ZnO-Based Conversion/Alloying Negative Electrodes for Lithium-Ion Batteries: Impact of Mixing Intimacy

Asenbauer, Jakob 1; Passerini, Stefano 1; Bresser, Dominic 1
1 Karlsruher Institut für Technologie (KIT)

Abstract:

Conversion/alloying materials, such as transition metal (TM)‐doped ZnO, are showing superior performance over pure ZnO due to the presence of the TM, enabling the reversible formation of Li$_{2}$O due to the enhanced electronic conductivity within the single particle once being reduced to the metallic state upon lithiation. Herein, the impact of introducing Co as representative TM at the atomic level in ZnO compared with mixtures of nano‐ and microsized CoO and ZnO is investigated. While even rather simple mixtures provide higher capacities than pure ZnO, an intimate mixing of nanoparticulate CoO and ZnO leads to a further increase due to the more homogeneous dispersion of Co. Nonetheless, the “atomic mixing” via doping still provides the highest capacities—for both nano‐ and microparticles, thus highlighting the importance of the very fine distribution of Co (and generally the TM) for realizing effective electron conduction pathways to enable the reversible formation of Li$_{2}$O.


Verlagsausgabe §
DOI: 10.5445/IR/1000129847
Veröffentlicht am 03.03.2021
Originalveröffentlichung
DOI: 10.1002/ente.202001084
Scopus
Zitationen: 6
Web of Science
Zitationen: 7
Dimensions
Zitationen: 6
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 03.2021
Sprache Englisch
Identifikator ISSN: 2194-4288, 2194-4296
KITopen-ID: 1000129847
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Erschienen in Energy technology
Verlag Wiley-VCH Verlag
Band 9
Heft 3
Seiten Art.-Nr.: 2001084
Vorab online veröffentlicht am 12.01.2021
Schlagwörter alloying; anode; conversion; doping; lithium-ion battery
Nachgewiesen in Scopus
Web of Science
Dimensions
Globale Ziele für nachhaltige Entwicklung Ziel 7 – Bezahlbare und saubere Energie
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