Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 12, Issue 3, Pages 374-377Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2009.12.038
Keywords
X-ray tomography; Microstructure; Representative volume element; Battery; Graphite electrode
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Funding
- UK EPSRC [GR/T26344]
- Danish Council for Strategic Research [2104-06-0011]
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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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