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Publication Detail
Characterization of the 3-dimensional microstructure of a graphite negative electrode from a Li-ion battery
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Shearing PR, Howard LE, Jorgensen PS, Brandon NP, Harris SJ
  • Publisher:
    ELSEVIER SCIENCE INC
  • Publication date:
    03/2010
  • Pagination:
    374, 377
  • Journal:
    ELECTROCHEM COMMUN
  • Volume:
    12
  • Issue:
    3
  • Print ISSN:
    1388-2481
  • Language:
    EN
  • Keywords:
    X-ray tomography, Microstructure, Representative volume element, Battery, Graphite electrode, CAPACITY FADE, LITHIUM, RECONSTRUCTION, MICROSCOPY, PERFORMANCE, TOMOGRAPHY, MECHANISMS, TORTUOSITY, DIFFUSION, POROSITY
  • Addresses:
    Brandon, NP
    Univ London Imperial Coll Sci Technol & Med
    Dept Earth Sci & Engn
    London
    England
Abstract
The 3-dimensional microstructure of a porous electrode from a lithium-ion battery has been characterized for the first time. We use X-ray tomography to reconstruct a 43 x 348 x 478 mu m sample volume with voxel dimensions of 480 nm, subsequent division of the reconstructed volumes into sub-volumes of different sizes allow us to determine microstructural parameters as a function of sub-division size. We show that the minimum size for a representative volume element is about 43 x 60 x 60 mu m for volume-specific surface area, but as large as the full sample volume for porosity and tortuosity. (C) 2009 Elsevier B.V. All rights reserved.
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