Lithium Intercalation Kinetics and Fast-Charging Lithium-Ion Batteries: Rational Design of Graphite Particles Via Spheroidization,Energy Technology

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Lithium Intercalation Kinetics and Fast-Charging Lithium-Ion Batteries: Rational Design of Graphite Particles Via Spheroidization
Energy Technology ( IF 3.6 ) Pub Date : 2023-02-23 , DOI: 10.1002/ente.202201469
Jan Martin ₁ , Peter Axmann ₁ , Margret Wohlfahrt-Mehrens ₁ , Marilena Mancini ₁

Affiliation

Graphite is the state-of-the-art anode active material in lithium-ion batteries with high specific capacity and long cycling stability. Nevertheless, due to the growing market requirements especially for the automotive sector, many efforts are dedicated to improve the fast-charging performance of the anode. Therefore, research focuses on different levels of the anode, for example, on material level to improve the kinetics of the lithium intercalation process or by optimization at the electrode level. For anode active material production, the spheroidization of natural and synthetic graphite is a very important step that affects particle characteristics and electrochemical behavior. Herein, natural and synthetic graphite materials are spheroidized by using a lab-scale spheroidization process. The obtained samples are characterized by means of different analytical techniques to investigate the influence of the spheroidization conditions on selected graphite characteristics that directly influence the charging rate performance. Apart from particle morphology, surface-related properties induced by the spheroidization process show correlation with the measured lithiation rate performance.

中文翻译：

锂嵌入动力学和快速充电锂离子电池：通过球化合理设计石墨颗粒

石墨是锂离子电池中最先进的负极活性材料，具有高比容量和长循环稳定性。然而，由于市场需求不断增长，特别是汽车领域的需求，许多努力致力于提高阳极的快速充电性能。因此，研究集中在阳极的不同层面，例如，在材料层面上改善锂嵌入过程的动力学或在电极层面上进行优化。对于负极活性材料的生产，天然和人造石墨的球化是影响颗粒特性和电化学行为的非常重要的步骤。在此，通过使用实验室规模的球化工艺对天然和合成石墨材料进行球化。通过不同的分析技术对获得的样品进行表征，以研究球化条件对直接影响充电倍率性能的选定石墨特性的影响。除了颗粒形态之外，球化过程引起的表面相关特性也显示出与测量的锂化速率性能的相关性。

更新日期：2023-02-23

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