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The Sound of Batteries: An Operando Acoustic Emission Study of the LiNiO$_{2}$ Cathode in Li–Ion Cells

Schweidler, Simon 1,2; Bianchini, Matteo 1,2; Hartmann, Pascal 1,2; Brezesinski, Torsten ORCID iD icon 1,2; Janek, Jürgen 1,2
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)
2 Center for Electrochemical Energy Storage Ulm & Karlsruhe (CELEST), Karlsruher Institut für Technologie (KIT)


The development of advanced Li‐ion batteries relies on the implementation of high‐capacity Ni‐rich layered oxide cathode materials, such as NCM and NCA, among others. However, fast performance decay because of intrinsic chemical and structural instabilities hampers their practical application. Hence, thoroughly understanding degradation processes is crucial to overcome current limitations. To monitor instabilities of electrode materials under realistic operating conditions, the application of nondestructive operando techniques is required. While structural changes of crystalline phases can be studied by X‐ray diffraction, microstructural changes (e. g., particle fracture) cannot be easily accessed in situ and are therefore mostly investigated ex situ. Here, we use acoustic emission (AE) measurements to probe a potential next‐generation cathode material in real‐time. Specifically, we focus on LiNiO$_{2}$(LNO) and demonstrate that AE events in different frequency ranges can be correlated with the formation of the cathode solid‐electrolyte interphase and the mechanical degradation during electrochemical cycling.

Verlagsausgabe §
DOI: 10.5445/IR/1000123687
Veröffentlicht am 15.09.2020
DOI: 10.1002/batt.202000099
Web of Science
Zitationen: 9
Zitationen: 7
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 10.2020
Sprache Englisch
Identifikator ISSN: 2566-6223, 2566-6223
KITopen-ID: 1000123687
HGF-Programm 37.01.01 (POF III, LK 01) Fundamentals and Materials
Erschienen in Batteries & supercaps
Verlag John Wiley and Sons
Band 3
Heft 10
Seiten 1021-1027
Vorab online veröffentlicht am 23.06.2020
Nachgewiesen in Dimensions
Web of Science
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