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 eects 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 eciency in the first cycle was dramatically aected; 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.

Structural Effects of Anomalous Current Densities on Manganese Hexacyanoferrate for Li-Ion Batteries / Angelo Mullaliu, Stéphanie Belin, Lorenzo Stievano, Marco Giorgetti, Stefano Passerini. - In: APPLIED SCIENCES. - ISSN 2076-3417. - ELETTRONICO. - 10:(2020), pp. 7573.1-7573.10. [10.3390/app10217573]

Structural Effects of Anomalous Current Densities on Manganese Hexacyanoferrate for Li-Ion Batteries

Marco Giorgetti
Penultimo
;
2020

Abstract

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 eects 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 eciency in the first cycle was dramatically aected; 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.
2020
Structural Effects of Anomalous Current Densities on Manganese Hexacyanoferrate for Li-Ion Batteries / Angelo Mullaliu, Stéphanie Belin, Lorenzo Stievano, Marco Giorgetti, Stefano Passerini. - In: APPLIED SCIENCES. - ISSN 2076-3417. - ELETTRONICO. - 10:(2020), pp. 7573.1-7573.10. [10.3390/app10217573]
Angelo Mullaliu, Stéphanie Belin, Lorenzo Stievano, Marco Giorgetti, Stefano Passerini
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/789162
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