Three-dimensional reconstruction of a composite cathode for lithium-ion cells

被引：138

作者：

Ender, Moses ^{[1
]}

Joos, Jochen ^{[1
]}

Carraro, Thomas ^{[2
]}

Ivers-Tiffee, Ellen ^{[1
]}

机构：

[1] KIT, IWE, D-76131 Karlsruhe, Germany

[2] Univ Heidelberg, Inst Angew Math, D-69120 Heidelberg, Germany

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2011年 / 13卷 / 02期

关键词：

Lithium-ion cell; FIB/SEM; LiFePO(4); Carbon black; Tortuosity; Image processing;

D O I：

10.1016/j.elecom.2010.12.004

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The three-dimensional microstructure of a porous composite cathode for lithium-ion cells has been analyzed by a combined focused ion beam (FIB)/scanning electron microscopy (SEM) approach. The spatial distributions of 1) carbon black as electronic conductor, 2) LiFePO(4) as active material and 3) pore volume were reconstructed by appropriate image processing methods. The representative volume element with a size of 5 x 5 x 15 mu m(3) = 375 mu m(3) (24 million volumetric pixels) delivered critical microstructural features as volume fractions, volume-specific surface areas and tortuosity of the three individual phases. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：166 / 168

页数：3

共 16 条

[1] Calculation of various physics constants in heterogenous substances I Dielectricity constants and conductivity of mixed bodies from isotropic substances [J].