Quantitative Microstructure Characterization of a NMC Electrode

Performance of lithium-ion batteries (LIBs) is strongly influenced by the porous microstructure of their electrodes. In this work, 3D microstructures of calendared and un-calendared positive electrode LiNi1/3Mn1/3Co1/3O2 (NMC) have been investigated in order to extract relevant properties useful for...

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Bibliographic Details
Main Authors: Usseglio-Viretta, François Laurent Emilien, Smith, Kandler
Format: Conference Proceeding
Language:English
Subjects:
30 DIRECT ENERGY CONVERSION
lithium-ion batteries
microstructure
NMC
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Summary:Performance of lithium-ion batteries (LIBs) is strongly influenced by the porous microstructure of their electrodes. In this work, 3D microstructures of calendared and un-calendared positive electrode LiNi1/3Mn1/3Co1/3O2 (NMC) have been investigated in order to extract relevant properties useful for battery modeling. Transport (volume fraction, connectivity, particle size and tortuosity) and electrochemical (specific surface area) properties have been calculated for the pore and the active material. Special attention has been paid to determine the size of the so-called representative volume element (RVE) required to be statistically representative of the heterogeneous medium. Several parameters have been calculated using a panel of different numerical methods in order to compare their results. Besides, the image level of detail has been evaluated (using original criteria based upon edge detection) to assess the overall data quality available for the study.
ISSN:1938-5862
1938-6737
1938-6737
1938-5862
DOI:10.1149/07711.1095ecst