Characterization of the 3-dimensional microstructure of a graphite negative electrode from a Li-ion battery

被引：246

作者：

Shearing, P. R. ^{[1
]}

Howard, L. E. ^{[2
]}

Jorgensen, P. S. ^{[3
]}

Brandon, N. P. ^{[1
]}

Harris, S. J. ^{[4
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Earth Sci & Engn, London, England

[2] Nat Hist Museum, Dept Mineral, London SW7 5BD, England

[3] Riso Natl Lab, DK-4000 Roskilde, Denmark

[4] Gen Motors R&D Ctr, Warren, MI USA

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2010年 / 12卷 / 03期

基金：

英国工程与自然科学研究理事会;

关键词：

X-ray tomography; Microstructure; Representative volume element; Battery; Graphite electrode; CAPACITY FADE; LITHIUM; RECONSTRUCTION; MICROSCOPY; PERFORMANCE; TOMOGRAPHY; MECHANISMS; TORTUOSITY; DIFFUSION; POROSITY;

D O I：

10.1016/j.elecom.2009.12.038

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

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.

引用

页码：374 / 377

页数：4

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