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

High-resolution X-ray microscopy is used to investigate the sequence of lithiation in LiFePO sub(4) porous electrodes. For electrodes with homogeneous interparticle electronic connectivity via the carbon black network, the smaller particles lithiate first. For electrodes with heterogeneous connectiv...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2015-11, Vol.27 (42), p.6591-6597
Main Authors: Li, Yiyang, Meyer, Sophie, Lim, Jongwoo, Lee, Sang Chul, Gent, William E, Marchesini, Stefano, Krishnan, Harinarayan, Tyliszczak, Tolek, Shapiro, David, Kilcoyne, Arthur LDavid, Chueh, William C
Format: Article
Language:English
Subjects:
Carbon black
Correlation
Electrodes
Electronics
Nanostructure
Networks
Particle size
X-ray microscopy
Online Access:Get full text
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Summary:High-resolution X-ray microscopy is used to investigate the sequence of lithiation in LiFePO sub(4) 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 reveal the presence of incoherent nanodomains that lithiate as if they are separate particles.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201502276