Quantitative Microstructure Characterization of a NMC Electrode

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11 Scopus Citations

Abstract

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.

Original languageAmerican English
Pages (from-to)1095-1118
Number of pages24
JournalECS Transactions
Volume77
Issue number11
DOIs
StatePublished - 2017
Event231st ECS Meeting - New Orleans, United States
Duration: 28 May 20171 Jun 2017

Bibliographical note

Publisher Copyright:
© The Electrochemical Society.

NREL Publication Number

  • NREL/JA-5400-68966

Keywords

  • lithium ion battery
  • microstructure
  • NMC

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