多孔性
电极
材料科学
欧姆接触
优化设计
电化学
复合材料
计算机科学
化学
物理化学
图层(电子)
机器学习
作者
Venkatasailanathan Ramadesigan,Ravi Methekar,Folarin Latinwo,Richard D. Braatz,Venkat R. Subramanian
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2010-01-01
卷期号:157 (12): A1328-A1328
被引量:100
摘要
This paper considers the design of spatially varying porosity profiles in next-generation electrodes based on simultaneous optimization of a porous-electrode model. Model-based optimal design (not including the solid-phase intercalation mechanism) is applied to a porous positive electrode made of lithium cobalt oxide, which is commonly used in lithium-ion batteries for various applications. For a fixed amount of active material, optimal grading of the porosity across the electrode was found to decrease the ohmic resistance by 15%–33%, which in turn increases the electrode capacity to hold and deliver energy. The optimal porosity grading was predicted to have 40% lower variation in the ohmic resistance to variations in model parameters due to manufacturing imprecision or capacity fade. The results suggest that the potential for the simultaneous model-based design of electrode material properties that employ more detailed physics-based first-principles electrochemical engineering models to determine optimal design values for manufacture and experimental evaluation.
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