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Eigenschaften rußbasierter Schwefel-Kathoden in Abhängigkeit der Herstellungsprozesse

Produktform: Buch / Einband - flex.(Paperback)

With the continuous development of high-performance materials for rechargeable batteries and the growing demand for battery cells in various applications, the processing of the materials into battery electrodes has become a key issue. Only the correct design and application of the process engineering operations makes it possible to push the materials to their performance limits. At the same time, the properties of the materials directly determine their usability with certain process routes. In this thesis, the extent to which the properties of the cathodes can be changed by adjusting the parameters of different processes is investigated using the example of carbon black based sulfur cathodes for lithium sulfur batteries. The main focus is on the comparison of dissolver and extruder as representatives for batch and continuous dispersion in order to test their suitability for the carbon black-sulfur material system. For this purpose, a product-effective specific power is calculated on the basis of the dispersion effect, which enables the comparison of the very different processes. The evaluation of the process parameter variation is carried out on the basis of the suspension and electrode properties as well as their performance. In addition to dispersion, the loading and compression of carbon black based sulfur cathodes is also investigated. In order to classify the properties of the cathodes, aqueous binder systems and carbons with higher specific surface areas are compared and processed into sulfur cathodes. Here, the influence on the processability is particularly relevant, which in turn requires new process strategies. Finally, composite particles are produced by a high-intensity mixing process in a ring shear mixer and the correlation of the properties with the process parameters is investigated. For a transfer to other mechanical processes a specific stressing energy is established and estimated. The properties of the electrodes resulting from the composites are analyzed exemplarily and evaluated in the context of the results obtained so far. Thus, this work spans a wide range over the entire process chain of electrode production for lithium sulfur batteries and considers central processing steps with regard to their mechanisms of operation. By estimating the stressing intensities, comparisons to other process routes and correlations of the properties of intermediate as well as end products with these parameters are enabled.weiterlesen

Dieser Artikel gehört zu den folgenden Serien

Sprache(n): Deutsch

ISBN: 978-3-9654809-1-9 / 978-3965480919 / 9783965480919

Verlag: sierke VERLAG - Sierke WWS GmbH

Erscheinungsdatum: 30.03.2021

Seiten: 260

Auflage: 1

Autor(en): Paul Titscher

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