TY - JOUR
T1 - The Fe4+/3+ Redox Mechanism in NaFeO2
T2 - A Simultaneous Operando Nuclear Resonance and X-ray Scattering Study
AU - Fehse, Marcus
AU - Bessas, Dimitrios
AU - Mahmoud, Abdelfattah
AU - Diatta, Aliou
AU - Hermann, Raphael P.
AU - Stievano, Lorenzo
AU - Sougrati, Moulay Tahar
PY - 2020
Y1 - 2020
N2 - Simultaneous operando Nuclear Forward Scattering and transmission X-ray diffraction and 57Fe Mössbauer spectroscopy measurements were carried out in order to investigate the electrochemical mechanism of NaFeO2 vs. Na metal using a specifically designed in situ cell. The obtained data were analysed using an alternative and innovative data analysis approach based on chemometric tools such as Principal Component Analysis (PCA) and Multivariate Curve Resolution - Alternating Least Squares (MCR-ALS). This approach, which allows the unbiased extraction of all possible information from the operando data, enabled the stepwise reconstruction of the independent “real” components permitting the description of the desodiation mechanism of NaFeO2. This wealth of information allows a clear description of the electrochemical reaction at the redox-active iron centres, and thus an improved comprehension of the cycling mechanisms of this material vs. sodium.
AB - Simultaneous operando Nuclear Forward Scattering and transmission X-ray diffraction and 57Fe Mössbauer spectroscopy measurements were carried out in order to investigate the electrochemical mechanism of NaFeO2 vs. Na metal using a specifically designed in situ cell. The obtained data were analysed using an alternative and innovative data analysis approach based on chemometric tools such as Principal Component Analysis (PCA) and Multivariate Curve Resolution - Alternating Least Squares (MCR-ALS). This approach, which allows the unbiased extraction of all possible information from the operando data, enabled the stepwise reconstruction of the independent “real” components permitting the description of the desodiation mechanism of NaFeO2. This wealth of information allows a clear description of the electrochemical reaction at the redox-active iron centres, and thus an improved comprehension of the cycling mechanisms of this material vs. sodium.
KW - Chemometrics
KW - MCR-ALS
KW - Mössbauer Spectroscopy
KW - Nuclear Forward Scattering
KW - Sodium Ion Batteries
UR - http://www.scopus.com/inward/record.url?scp=85105831452&partnerID=8YFLogxK
U2 - 10.1002/batt.202000157
DO - 10.1002/batt.202000157
M3 - Article
AN - SCOPUS:85105831452
SN - 2566-6223
VL - 3
SP - 1341
EP - 1349
JO - Batteries and Supercaps
JF - Batteries and Supercaps
IS - 12
ER -