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Energies 2014, 7(4), 2558-2572; doi:10.3390/en7042558
Article

Geometric Characteristics of Three Dimensional Reconstructed Anode Electrodes of Lithium Ion Batteries

1
, 1,2
, 3
 and 1,*
Received: 25 February 2014; in revised form: 31 March 2014 / Accepted: 1 April 2014 / Published: 22 April 2014
(This article belongs to the Special Issue Electrochemical Energy Storage—Battery and Capacitor)
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Abstract: The realistic three dimensional (3D) microstructure of lithium ion battery (LIB) electrode plays a key role in studying the effects of inhomogeneous microstructures on the performance of LIBs. However, the complexity of realistic microstructures imposes a significant computational cost on numerical simulation of large size samples. In this work, we used tomographic data obtained for a commercial LIB graphite electrode to evaluate the geometric characteristics of the reconstructed electrode microstructure. Based on the analysis of geometric properties, such as porosity, specific surface area, tortuosity, and pore size distribution, a representative volume element (RVE) that retains the geometric characteristics of the electrode material was obtained for further numerical studies. In this work, X-ray micro-computed tomography (CT) with 0.56 μm resolution was employed to capture the inhomogeneous porous microstructures of LIB anode electrodes. The Sigmoid transform function was employed to convert the initial raw tomographic images to binary images. Moreover, geometric characteristics of an anode electrode after 2400 cycles at the charge/discharge rate of 1 C were compared with those of a new anode electrode to investigate morphological change of the electrode. In general, the cycled electrode shows larger porosity, smaller tortuosity, and similar specific surface area compared to the new electrode.
Keywords: lithium ion batteries (LIBs); computed tomography (CT); geometric characteristics; representative volume element (RVE) lithium ion batteries (LIBs); computed tomography (CT); geometric characteristics; representative volume element (RVE)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Lim, C.; Yan, B.; Yin, L.; Zhu, L. Geometric Characteristics of Three Dimensional Reconstructed Anode Electrodes of Lithium Ion Batteries. Energies 2014, 7, 2558-2572.

AMA Style

Lim C, Yan B, Yin L, Zhu L. Geometric Characteristics of Three Dimensional Reconstructed Anode Electrodes of Lithium Ion Batteries. Energies. 2014; 7(4):2558-2572.

Chicago/Turabian Style

Lim, Cheolwoong; Yan, Bo; Yin, Leilei; Zhu, Likun. 2014. "Geometric Characteristics of Three Dimensional Reconstructed Anode Electrodes of Lithium Ion Batteries." Energies 7, no. 4: 2558-2572.


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