Saito Yuria
Separator Design Co. Ltd. 1725-1, Hagyu, Ooaza, Iide-machi, Yamagata 999-0602, Japan.
National Institute of Advanced Industrial Science & Technology 1-8-31, Midorigaoka, Ikeda 563-8577, Japan.
Membranes (Basel). 2021 Apr 9;11(4):277. doi: 10.3390/membranes11040277.
Further improvement in the performance of lithium secondary batteries will be an indispensable issue to realize a decarbonized society. Among them, the batteries for electric vehicles still have many issues to be addressed because they are subject to various conditions such as high-power performance, safety, and cost restrictions for widespread use. Those subjects require extensive researches from the improvement of each element material to control the battery system to optimize the total performance. Based on this idea, we have been conducting research focusing on ion movement to elucidate the ion conduction mechanism from the microscopic point of view. It has been recognized that the ionic mobility in the battery, which dominates the power performance of the battery, is affected by the solid environment in which the ions move (separator and electrode materials) and the evaluation of ion movement, including the interaction with the surroundings, is necessary as an essential step for battery design. In this article, I will introduce the evaluation approach of ion dynamics and the evaluation results of mobility and interactive situations of carrier ions in the practical separator membranes and gel electrolytes. Finally, the direction of material design is outlined through this review.
锂二次电池性能的进一步提升将是实现脱碳社会不可或缺的问题。其中，电动汽车用电池仍有许多问题需要解决，因为它们要面临诸如高功率性能、安全性以及广泛应用所需的成本限制等各种条件。这些课题需要从改进各元素材料到控制电池系统进行广泛研究，以优化整体性能。基于这一理念，我们一直在开展聚焦于离子移动的研究，从微观角度阐明离子传导机制。人们已经认识到，电池中的离子迁移率主导着电池的功率性能，它受离子移动的固体环境（隔膜和电极材料）影响，并且对离子移动的评估，包括与周围环境的相互作用，作为电池设计的关键步骤是必要的。在本文中，我将介绍离子动力学的评估方法以及实际隔膜和凝胶电解质中载流子离子迁移率和相互作用情况的评估结果。最后，通过这篇综述概述材料设计的方向。
