Effects of Particle Size, Electronic Connectivity, and Incoherent Nanoscale Domains on the Sequence of Lithiation in LiFePO 4 Porous Electrodes

High-resolution X-ray microscopy is used to investigate the sequence of lithiation in LiFePO4 porous electrodes. For electrodes with homogeneous interparticle electronic connectivity via the carbon black network, the smaller particles lithiate first. For electrodes with heterogeneous connectivity, t...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2015-10, Vol.27 (42)
Main Authors: Li, Yiyang, Meyer, Sophie, Lim, Jongwoo, Lee, Sang Chul, Gent, William E., Marchesini, Stefano, Krishnan, Harinarayan, Tyliszczak, Tolek, Shapiro, David, Kilcoyne, Arthur L. David, Chueh, William C.
Format: Article
Language:English
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MATERIALS SCIENCE
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Summary:High-resolution X-ray microscopy is used to investigate the sequence of lithiation in LiFePO4 porous electrodes. For electrodes with homogeneous interparticle electronic connectivity via the carbon black network, the smaller particles lithiate first. For electrodes with heterogeneous connectivity, the better-connected particles preferentially lithiate. Correlative electron and X-ray microscopy also show the presence of incoherent nanodomains that lithiate as if they are separate particles.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201502276