Abstract

Drying of the coated slurry using N-Methyl-2-Pyrrolidone as the solvent during the fabrication process of the negative electrode of a lithium-ion battery was studied in this work. Three different drying temperatures, i.e., 70˚C, 80˚C and 90˚C were considered. The drying experiments were carried out in a laboratory tray dryer at atmospheric pressure. Mass transfer coefficient and effective capillary diffusivity of the solvent during drying were estimated. A semi-empirical model was developed to estimate the parameters. In addition, different thin-layer empirical models were fitted to the experimental data, and the parameters were estimated using the best-fitted model. During the drying process, shrinking of the coating was considered while estimating the parameters.

摘要

本文研究了锂离子电池负极制备过程中以N-甲基-2-吡咯烷酮为溶剂的涂布浆料的干燥过程。考虑了三种不同的干燥温度，即 70˚C、80˚C 和 90˚C。干燥实验在大气压下在实验室盘式干燥器中进行。估计了干燥过程中溶剂的传质系数和有效毛细管扩散率。开发了一个半经验模型来估计参数。此外，将不同的薄层经验模型拟合到实验数据，并使用最佳拟合模型估计参数。在干燥过程中，在估计参数时考虑了涂层的收缩。