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首页> 外文会议>Charging amp; infrastructure symposium 2018 >Multilayered Electrodes for Li-Ion Batteries to Reduce Drying Time
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Multilayered Electrodes for Li-Ion Batteries to Reduce Drying Time

机译：锂离子电池多层电极，减少干燥时间

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摘要

Lithium-ion batteries are an energy storage system that nowadays finds application in everyday life, for example in mobile phones, laptops or electric tools. Furthermore, due to their high energy and power density, lithium-ion batteries are a promising candidate for facilitating the way to a change in energy policy and be used in electro mobility or as an energy storage system that balances fluctuations of renewable energy sources like wind and solar energy. Research engages in improving cell efficiency, calendar life and cycle durability and meanwhile reducing production costs. To render this possible, a deep understanding of each process step is mandatory. In former investigations it has been proven, that the drying step deeply influences the micro structure of the electrode and thus cell performance. Depending on the drying rate, binder is distributed over the electrode height during drying. For moderate drying rates a rather homogenous distribution is expected while for higher drying rates a migration of binder to the surface has been proven that can lead to a malfunction of the electrode. [2] In this work, different approaches have been deployed to counteract binder migration to the electrode surface, while still maintaining high drying rates and thus fast process times. Multilayer electrodes have been produced with a sequential coating step and a simultaneously applied coating. This allows for increased binder contents in the bottom layer and thereby also for higher drying rates. Binder migration has been evaluated by means of adhesion measurements.
机译：锂离子电池是一种能量存储系统，如今已在日常生活中得到应用，例如在移动电话，笔记本电脑或电动工具中。此外，由于其高能量和功率密度，锂离子电池是促进能源政策变化的有希望的候选者，可用于电动汽车或平衡风能等可再生能源波动的储能系统和太阳能。研究致力于提高电池效率，日历寿命和循环耐久性，同时降低生产成本。为了使之成为可能，必须对每个过程步骤都有深刻的理解。在以前的研究中已经证明，干燥步骤会深深影响电极的微观结构，从而影响电池性能。根据干燥速度，在干燥过程中，粘合剂会分布在整个电极高度上。对于适中的干燥速率，期望相当均匀的分布，而对于较高的干燥速率，已经证明粘合剂向表面的迁移会导致电极故障。 [2]在这项工作中，已经采用了不同的方法来抵消粘合剂向电极表面的迁移，同时仍然保持较高的干燥速率，从而缩短了处理时间。多层电极是通过顺序涂覆步骤和同时涂覆的涂层制成的。这允许增加底层中的粘合剂含量，从而也可以提高干燥速率。粘合剂迁移已通过粘附力测量进行了评估。

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  • 会议地点 Mainz(DE)
  • 作者

    Jana Kumberg; R. Diehm; C. Doerrer; J. Knack; C. Grosselindemann; R Scharfer; W. Schabel;

  • 作者单位

    Karlsruhe Institute of Technology, Institute of Thermal Process Engineering, Thin Film Technology, Strasse am Forum 7, Karlsruhe, D-76131 Germany;

    Karlsruhe Institute of Technology, Institute of Thermal Process Engineering, Thin Film Technology, Strasse am Forum 7, Karlsruhe, D-76131 Germany;

    Karlsruhe Institute of Technology, Institute of Thermal Process Engineering, Thin Film Technology, Strasse am Forum 7, Karlsruhe, D-76131 Germany;

    Karlsruhe Institute of Technology, Institute of Thermal Process Engineering, Thin Film Technology, Strasse am Forum 7, Karlsruhe, D-76131 Germany;

    Karlsruhe Institute of Technology, Institute of Thermal Process Engineering, Thin Film Technology, Strasse am Forum 7, Karlsruhe, D-76131 Germany;

    Karlsruhe Institute of Technology, Institute of Thermal Process Engineering, Thin Film Technology, Strasse am Forum 7, Karlsruhe, D-76131 Germany;

    Karlsruhe Institute of Technology, Institute of Thermal Process Engineering, Thin Film Technology, Strasse am Forum 7, Karlsruhe, D-76131 Germany;

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