Drying influence on binder distribution in electrodes for Lithium ion batteries - Mechanistic insight into the progress of component distribution

干燥对锂离子电池电极中粘合剂分布的影响 - 成分分布进展的机理洞察

• 批准号: 244530906
• 负责人: Professor Dr.-Ing. Wilhelm Schabel
• 金额: --
• 依托单位: Bereich Thin Film Technology
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/244530906?language=en
• 关键词: Drying; influence; binder; distribution; electrodes

Properties of electrodes used in lithium-ion batteries are mainly defined by the complex micro structure of the active layer. It is defined by the local distribution of the particulate active material and functional additives throughout the film. Within the work conducted in the first funding period the influence of the parameters drying rate and drying temperature on the film structure was investigated. As a major outcome of this investigation both parameters were found to impact differently and have, therefore, to be considered separately. The results form the basis for the development of a predictive drying model that allows for description of the evolution of the component distribution and formation of the film structure. The objective of this proposal is the detailed elaboration of the film solidification mechanism. The examination of the chronological sequence of the structural development requires specific measurement techniques with a high local and chronological resolution of the distribution of single components over the film height. These techniques are not available for the drying process at relevant and defined boundary conditions. Therefore, several hypotheses concerning characteristic, intermediate film states were elaborated that will be checked up on by means of adhesive force measurements, EDS and additional methods that have been successfully applied in preliminary experiments. In addition, a novel, innovative experimental approach is applied that allows for revelation of the chronological evolution of specific film properties on the basis of the dry film properties.

锂离子电池中使用的电极的性能主要由活性层的复杂微型结构定义。它是由整个薄膜中颗粒活性材料和功能添加剂的局部分布定义的。在第一个资金期间进行的工作中，研究了参数干燥速率和干燥温度对膜结构的影响。作为这项研究的主要结果，发现两个参数的影响都不同，因此已被分别考虑。结果构成了开发预测干燥模型的基础，该模型允许描述膜结构的成分分布和形成的演变。该提案的目的是详细阐述膜固化机制。对结构发展的时间顺序的检查需要特定的测量技术，并以较高的局部和时间顺序分析单个组件在膜高度上的分布分布。在相关和定义的边界条件下，这些技术无法用于干燥过程。因此，详细阐述了一些有关特征，中间膜状态的假设，这些假设将通过粘合力测量，ED和已成功应用于初步实验中的其他方法进行检查。此外，采用了一种新颖的创新实验方法，该方法允许根据干膜特性启示特定膜特性的年代演化。

项目成果

Experimental investigation into battery electrode surfaces: The distribution of liquid at the surface and the emptying of pores during drying.

• DOI: 10.1016/j.jcis.2017.01.063
• 发表时间: 2017-05
• 期刊: Journal of colloid and interface science
• 影响因子: 9.9
• 作者: S. Jaiser;L. Funk;M. Baunach;P. Scharfer;W. Schabel

Development of a three-stage drying profile based on characteristic drying stages for lithium-ion battery anodes

• DOI: 10.1080/07373937.2016.1248975
• 发表时间: 2017-02
• 期刊: Drying Technology
• 影响因子: 3.3
• 作者: S. Jaiser;Anatolij Friske;M. Baunach;P. Scharfer;W. Schabel

Delamination behavior of lithium-ion battery anodes: Influence of drying temperature during electrode processing

• DOI: 10.1080/07373937.2015.1060497
• 发表时间: 2016-01-01
• 期刊: DRYING TECHNOLOGY
• 影响因子: 3.3
• 作者: Baunach, M.;Jaiser, S.;Schabel, W.
• 通讯作者: Schabel, W.

Investigation of film solidification and binder migration during drying of Li-Ion battery anodes

• DOI: 10.1016/j.jpowsour.2016.04.018
• 发表时间: 2016-06-30
• 期刊: JOURNAL OF POWER SOURCES
• 影响因子: 9.2
• 作者: Jaiser, Stefan;Mueller, Marcus;Schabel, Wilhelm
• 通讯作者: Schabel, Wilhelm

Impact of drying conditions and wet film properties on adhesion and film solidification of lithium-ion battery anodes

干燥条件和湿膜性能对锂离子电池负极附着力和薄膜固化的影响

• DOI: 10.1080/07373937.2016.1276584
• 发表时间: 2017
• 期刊: Drying Technology
• 影响因子: 3.3
• 作者: Jaiser;Stefan;Sanchez Salach;Nicolas;Baunach;Michael;Scharfer;Philip;Schabel;Wilhelm
• 通讯作者: Wilhelm