Kremer, Lea and Hoffmann, Alice and Danner, Timo and Hein, Simon and Prifling, Benedikt and Westhoff, Daniel and Dreer, Christian and Latz, Arnulf and Schmidt, Volker and Wohlfahrt-Mehrens, Margret (2019) Manufacturing Process for Improved Ultra‐Thick Cathodes in High‐Energy Lithium‐Ion Batteries. Energy Technology (190016). Wiley. doi: 10.1002/ente.201900167. ISSN 2194-4288.
![]() |
PDF
- Only accessible within DLR
- Published version
4MB |
Official URL: https://onlinelibrary.wiley.com/doi/full/10.1002/ente.201900167
Abstract
The effect of the mixing and drying process on the microstructure of ultra‐thick NCM 622 cathodes (50 mg cm−2, 8 mAh cm−2) and its implication for battery performance is investigated. It is observed that the shear force during the mixing process significantly influences the resulting microstructure with regard to binder migration during the drying process. Based on the information extracted from scanning electron microscopy–energy dispersive X‐ray spectroscopy (SEM–EDX) cross sections, the carbon binder domain (CBD) is distributed in the pore space of virtual electrodes generated by a stochastic 3D microstructure model. Simulations predict a CBD configuration that leads to optimal performance of the electrode. Furthermore, it is shown that a low drying rate has a beneficial influence toward the rate capability of the ultra‐thick cathodes. The specific energy of an ultra‐thick cathode is 18% higher compared with a cathode prepared according to the state of the art. With an improved process in a pilot scale, the advantage can be kept up to current densities of at least 3 mA cm−².
Item URL in elib: | https://elib.dlr.de/132131/ | |||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Document Type: | Article | |||||||||||||||||||||||||||||||||
Title: | Manufacturing Process for Improved Ultra‐Thick Cathodes in High‐Energy Lithium‐Ion Batteries | |||||||||||||||||||||||||||||||||
Authors: |
| |||||||||||||||||||||||||||||||||
Date: | 17 April 2019 | |||||||||||||||||||||||||||||||||
Journal or Publication Title: | Energy Technology | |||||||||||||||||||||||||||||||||
Refereed publication: | Yes | |||||||||||||||||||||||||||||||||
Open Access: | No | |||||||||||||||||||||||||||||||||
Gold Open Access: | No | |||||||||||||||||||||||||||||||||
In SCOPUS: | Yes | |||||||||||||||||||||||||||||||||
In ISI Web of Science: | Yes | |||||||||||||||||||||||||||||||||
DOI : | 10.1002/ente.201900167 | |||||||||||||||||||||||||||||||||
Publisher: | Wiley | |||||||||||||||||||||||||||||||||
ISSN: | 2194-4288 | |||||||||||||||||||||||||||||||||
Status: | Published | |||||||||||||||||||||||||||||||||
Keywords: | battery; production; mixing; thick electrodes; | |||||||||||||||||||||||||||||||||
HGF - Research field: | Energy | |||||||||||||||||||||||||||||||||
HGF - Program: | Storage and Cross-linked Infrastructures | |||||||||||||||||||||||||||||||||
HGF - Program Themes: | Electrochemical Energy Storage | |||||||||||||||||||||||||||||||||
DLR - Research area: | Energy | |||||||||||||||||||||||||||||||||
DLR - Program: | E SP - Energy Storage | |||||||||||||||||||||||||||||||||
DLR - Research theme (Project): | E - Electrochemical Prcesses (Batteries) (old) | |||||||||||||||||||||||||||||||||
Location: | Stuttgart | |||||||||||||||||||||||||||||||||
Institutes and Institutions: | Institute of Engineering Thermodynamics > Computational Electrochemistry | |||||||||||||||||||||||||||||||||
Deposited By: | Danner, Timo | |||||||||||||||||||||||||||||||||
Deposited On: | 19 Dec 2019 15:42 | |||||||||||||||||||||||||||||||||
Last Modified: | 19 Dec 2019 15:42 |
Repository Staff Only: item control page