Quantitative Characterization of LiFePO4 Cathodes Reconstructed by FIB/SEM Tomography
Quantitative Characterization of LiFePO4 Cathodes Reconstructed by FIB/SEM Tomography
复制标题
通过 FIB/SEM 断层扫描重建 LiFePO4 阴极的定量表征
DOI:
10.1149/2.033207jes
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发表时间:
2012
影响因子:
3.9
通讯作者:
E. Ivers-Tiffée
中科院分区:
文献类型:
--
作者:
M. Ender;J. Joos;T. Carraro;E. Ivers-Tiffée
The three-dimensional microstructures of a lab-scale and a high-power LiFePO 4 cathode for lithium-ion cells are analyzed by combined focused ion beam (FIB)/scanning electron microscopy (SEM) tomography. The spatial distributions of (a) carbon black as electronic conductor (b) LiFePO 4 as active material and (c) pore volume are reconstructed by appropriate image processing methods. The global threshold segmentation procedure is replaced by a refined local threshold method, which accounts for gradients in luminosity even within very large imaged volumes. The precise analysis of the high-power cathode demands for reconstructing a very large volume of 18.15× 17.75× 27.8 μm 3, caused by the dual length-scale design of LiFePO 4, carbon black and pore phase. The microstructure features,(a) electrochemically active surface area and particle size distribution of LiFePO 4,(b) shape and particle size distribution of carbon black and (c) porosity and tortuosity of the pore phase are compared between lab-scale and high-power cathode.
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影响因子:
--
作者:
B. Rüger;Jochen Joos;A. Weber;T. Carraro;E. Ivers
通讯作者:
E. Ivers
影响因子:
9.2
作者:
Schmidt, Jan Philipp;Chrobak, Thorsten;Ivers-Tiffee, Ellen
通讯作者:
Ivers-Tiffee, Ellen
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
Jochen Joos;T. Carraro;M. Ender;B. Rüger;A. Weber;E. Ivers
通讯作者:
E. Ivers
影响因子:
9.2
作者:
Wilson, James R.;Cronin, J. Scott;Harris, Stephen J.
通讯作者:
Harris, Stephen J.