锂离子电池电极制造干燥过程的建模与优化

IF 3.6 4区 工程技术 Q3 ENERGY & FUELS
Yuxin Chen, Haolan Tao, Bing Li, Baorong Li, Cheng Lian, Honglai Liu
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引用次数: 0

摘要

电极干燥是锂离子电池制造过程中的一道关键工序,会对电极的机械性能和循环寿命产生重大影响。高干燥速率会提高电池产量,但会降低电极中粘结剂的均匀性,从而导致电极与集电体分离。本文建立了一个将溶剂蒸发和粘结剂扩散结合起来的物理模型,以研究干燥过程中粘结剂的不均匀富集。结果表明,在高溶剂分压和温度下降的情况下,干燥过程可确保粘结剂有足够的扩散时间,从而打破了干燥效率和电极质量之间的权衡。基于工艺参数和干燥性能之间的综合相关分析,建立了一个经验方程来预测粘合剂的分布。这项工作有助于深入了解电极中粘结剂富集的形成和演变过程,并有可能为优化电极干燥过程提供指导。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Modeling and Optimizing the Drying Process of Electrode Manufacturing for Lithium-Ion Batteries

Drying the electrode is a crucial process in the manufacture of lithium-ion batteries, which significantly affects the mechanical performance and cycle life of electrodes. High drying rate increases the battery production but reduces the uniformity of the binder in the electrode, which causes the detaching of the electrode from the collector. Herein, a physical model that couples solvent evaporation and binder diffusion is established to study the uneven enrichment of binder during the drying process. The results indicate that the drying process at the high solvent partial pressure and in a temperature-drop situation ensures sufficient time for the diffusion of binder, which breaks the trade-off between drying efficiency and electrode quality. Based on a comprehensive correlation analysis between process parameters and drying performance, an empirical equation is established to predict binder distribution. This work could offer insights into the formation and evolution of binder enrichment in electrodes and potentially provide guidelines for optimizing the drying processes of electrode.

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来源期刊
Energy technology
Energy technology ENERGY & FUELS-
CiteScore
7.00
自引率
5.30%
发文量
0
审稿时长
1.3 months
期刊介绍: Energy Technology provides a forum for researchers and engineers from all relevant disciplines concerned with the generation, conversion, storage, and distribution of energy. This new journal shall publish articles covering all technical aspects of energy process engineering from different perspectives, e.g., new concepts of energy generation and conversion; design, operation, control, and optimization of processes for energy generation (e.g., carbon capture) and conversion of energy carriers; improvement of existing processes; combination of single components to systems for energy generation; design of systems for energy storage; production processes of fuels, e.g., hydrogen, electricity, petroleum, biobased fuels; concepts and design of devices for energy distribution.
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