Physical Property Analysis of Composite Electrodes with Different Active Material Sizes and Densities using 3D Structural Modeling
JOURNAL OF THE KOREAN ELECTROCHEMICAL SOCIETY(2020)
摘要
Composite electrodes for rechargeable batteries generally consist of active material, electric conductor, and polymeric binder. And their composition and distribution within the composite electrode determine the electrochemical activity in the electrochemical systems. However, it is not easy to quantify the physical properties of composite electrodes themselves using conventional experimental analysis tools. So, 3D structural modeling and simulation can be an efficient design tool by looking into the contact areas between particles and electric conductivity within the composite electrode. In this study, while maintaining the composition (LiCoO2 : Super P Li (R) : Polyvinylidene Fluoride (PVdF) = 93 : 3 : 4 by wt%) and loading level (13 mg cm(-2)) of the composite electrode, the effects of LiCoO2 size (10 mu m and 20 mu m) and electrode density (2.8 g cm(-3), 3.0 g cm(-3), 3.2 g cm(-3), 3.5 g cm(-3), 4.0 g cm(-3)) on the physical properties are investigated using a GeoDict software. With this tool, the composite electrode can be efficiently designed to optimize the contact area and electric conductivity.
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关键词
3D Structural Modeling,Composite Electrode,Active Material,Contact Area,Electric Conductivity
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