Evaluation of tortuosity: A radical tessellation-based method in porous spherical particle packing systems

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology Pub Date : 2026-03-01 Epub Date: 2026-02-21 DOI:10.1016/j.apt.2026.105191

Zongli Chen, Chenzhe Li, Ying Zhao

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Abstract

Estimating the tortuosity of porous electrodes is important for understanding the performance of lithium-ion batteries and optimizing the design of electrode microstructures. In this work, an improved method for estimating the tortuosity of porous electrodes is proposed based on radical tessellation, and the results agree well with those calculated by empirical formulas and finite element simulations. Compared with empirical formulas, the proposed method can estimate tortuosity for more complicated microstructures, regardless of particle distribution and size dispersity; compared with finite element simulations, the proposed method offers a significant advantage in computational efficiency. Based on the method, the influence of different microstructure characters on the tortuosity is discussed. It is found that in addition to the porosity, the particle size and particle aggregation morphology are all critical in influencing the tortuosity of the porous electrode. Finally, the tortuosity obtained by this method is integrated into the Pseudo-2-dimension (P2D) model for the calculation of effective properties, and the results show that this method offers an efficient way in improving the prediction accuracy of P2D models.

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弯曲度的评估：多孔球形颗粒填充系统中基于径向镶嵌的方法

估算多孔电极的弯曲度对于理解锂离子电池的性能和优化电极微结构设计具有重要意义。本文提出了一种基于径向镶嵌的多孔电极弯曲度估计方法，其计算结果与经验公式和有限元模拟结果吻合较好。与经验公式相比，该方法可以在不考虑颗粒分布和尺寸分散性的情况下估计更复杂的微观结构的扭曲度；与有限元模拟相比，该方法在计算效率上具有显著优势。在此基础上，讨论了不同微观结构特征对弯曲度的影响。研究发现，除孔隙率外，颗粒尺寸和颗粒聚集形态都是影响多孔电极弯曲度的关键因素。最后，将该方法得到的弯曲度整合到伪二维（P2D）模型中进行有效特性的计算，结果表明该方法为提高P2D模型的预测精度提供了一种有效的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advanced Powder Technology 工程技术-工程：化工

CiteScore

9.50

自引率

7.70%

发文量

424

审稿时长

55 days

期刊介绍： The aim of Advanced Powder Technology is to meet the demand for an international journal that integrates all aspects of science and technology research on powder and particulate materials. The journal fulfills this purpose by publishing original research papers, rapid communications, reviews, and translated articles by prominent researchers worldwide. The editorial work of Advanced Powder Technology, which was founded as the International Journal of the Society of Powder Technology, Japan, is now shared by distinguished board members, who operate in a unique framework designed to respond to the increasing global demand for articles on not only powder and particles, but also on various materials produced from them. Advanced Powder Technology covers various areas, but a discussion of powder and particles is required in articles. Topics include: Production of powder and particulate materials in gases and liquids(nanoparticles, fine ceramics, pharmaceuticals, novel functional materials, etc.); Aerosol and colloidal processing; Powder and particle characterization; Dynamics and phenomena; Calculation and simulation (CFD, DEM, Monte Carlo method, population balance, etc.); Measurement and control of powder processes; Particle modification; Comminution; Powder handling and operations (storage, transport, granulation, separation, fluidization, etc.)