Structural Effects of Anomalous Current Densities on Manganese Hexacyanoferrate for Li-Ion Batteries
peer-reviewed
Erstveröffentlichung
2020-10-27Autoren
Mullaliu, Angelo
Belin, Stéphanie
Stievano, Lorenzo
Giorgetti, Marco
Passerini, Stefano
Wissenschaftlicher Artikel
Erschienen in
Applied Sciences ; 10 (2020), 21. - Art.-Nr. 7573. - eISSN 2076-3417
Link zur Originalveröffentlichung
https://dx.doi.org/10.3390/app10217573Externe Kooperationen
Karlsruher Institut für TechnologieHelmholtz-Institut Ulm
Synchrotron SOLEIL
University of Montpellier
University of Bologna
Dokumentversion
Veröffentlichte Version (Verlags-PDF)Zusammenfassung
A battery management system (BMS) plays a pivotal role in providing optimal performance of lithium-ion batteries (LIBs). However, the eventual malfunction of the BMS may lead to safety hazards or reduce the remaining useful life of LIBs. Manganese hexacyanoferrate (MnHCF) was employed as the positive electrode material in a Li-ion half-cell and subjected to five cycles at high current densities (10 A gMnHCF−1) and to discharge at 0.1 A gMnHCF−1, instead of classical charge/discharge cycling with initial positive polarization at 0.01 A gMnHCF−1, to simulate a current sensor malfunctioning and to evaluate the electrochemical and structural effects on MnHCF. The operando set of spectra at the Mn and Fe K-edges was further analyzed through multivariate curve resolution analysis with an alternating least squares algorithm (MCR–ALS) and extended X-ray absorption fine structure (EXAFS) spectroscopy to investigate the structural modifications arising during cycling after the applied electrochemical protocol. The coulombic efficiency in the first cycle was dramatically affected; however, the local structural environment around each photo absorber recovered during charging. The identification of an additional spectral contribution in the electrochemical process was achieved through MCR-ALS analysis, and the Mn-local asymmetry was thoroughly explored via EXAFS analysis
Schlagwörter
[GND]: Röntgenabsorptionsfeinstruktur | EXAFS | Batteriemanagementsystem[LCSH]: Lithium ion batteries | Battery management systems
[Freie Schlagwörter]: Prussian blue analog | manganese hexacyanoferrate | MCR-ALS | XAFS
[DDC Sachgruppe]: DDC 540 / Chemistry & allied sciences
Metadata
Zur LanganzeigeDOI & Zitiervorlage
Nutzen Sie bitte diesen Identifier für Zitate & Links: http://dx.doi.org/10.18725/OPARU-40972
Mullaliu, Angelo et al. (2022): Structural Effects of Anomalous Current Densities on Manganese Hexacyanoferrate for Li-Ion Batteries. Open Access Repositorium der Universität Ulm und Technischen Hochschule Ulm. http://dx.doi.org/10.18725/OPARU-40972
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