
Ann-Kathrin Wurba, M.Sc.
- Akad. Mitarbeiterin
- Bereich: Maschinen, Anlagen und Prozessautomatisierung
- Sprechstunden: nach Vereinbarung
- Raum: 132, Geb. 50.36, Campus Süd 205, Geb. 276, Campus Nord
- Tel.: +49 1523 9502617
- Ann-Kathrin WurbaDkw3∂kit edu
76131 Karlsruhe
Kaiserstraße 12
Ann-Kathrin Wurba, M.Sc.
Forschungs- und Arbeitsgebiete:
- Batterieproduktion
- Elektromobilität
Projekte:
- POLiS - Post Lithium Storage (https://www.postlithiumstorage.org/de/)
Lebenslauf:
seit 04/2020 |
Wissenschaftliche Mitarbeiterin am Institut für Produktionstechnik (wbk) des Karlsruher Instituts für Technologie (KIT) |
10/2013 - 03/2020 |
Studium des Maschinenbaus am Karlsruher Institut für Technologie (KIT) |
Veröffentlichungen
[ 1 ] | Coutandin, S.; Wurba, A.; Luft, A.; Schmidt, F.; Dackweiler, M. & Fleischer, J. (2019), Mechanical characterisation of the shear, bending and friction behaviour of bindered woven fabrics during the forming process, Materials Science and Engineering Technology, Nr. 12, S. 1573-1587. 10.1002/mawe.201900074
Abstract
A critical process step within the liquid composite moulding constitutes in the preforming of two-dimensional textile material into a near-net-shape and load-capable fibre structure by stamp forming. This paper presents fundamental material experiments on the shearing behaviour, bending properties and friction behaviour considering the binder quantity and forming temperature. In addition, the influence of the process time on the resulting stability of the preform is examined. The findings indicate that the quantity of the binder as well as the forming temperature and the process time have a great influence on the preform quality.
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[ 2 ] | Hofmann, J.; Wurba, A.; Bold, B.; Maliha, S.; Schollmeyer, P.; Fleischer, J.; Klemens, J.; Scharfer, P. & Schabel, W. (2020), Investigation of Parameters Influencing the Producibility of Anodes for Sodium-Ion Battery Cells. Production at the leading edge of technology, Hrsg. Behrens, B.; Brosius, A.; Hintze, W.; Ihlenfeldt, S. & Wulfsberg, J. P., Springer, Berlin, Heidelberg, S. 171?181.
Abstract
Lithium-ion battery cells will dominate the market in the next 10
years. However, the use of certain materials as cobalt is a critical issue today
and is constantly being reduced. Sodium-ion batteries are an alternative, which
has already been researched on a laboratory scale. Increasing of the individual
production steps are serious bottlenecks for bringing basic cell concepts into
application. Within this paper a systematic investigation of parameters influencing
the producibility for sodium-ion battery cells will be taken into account.
For this purpose, the characteristic process variables and challenges along the
production chain are presented along the process chain of lithium-ion battery
cells. The influence of various process-machine interactions on the properties
of the electrode is illustrated using the anode of sodium-ion batteries as an
example. First conclusions whether the production technology can be adapted
to the cell chemistry of the future at an early stage will be made.
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[ 3 ] | Wurba, A.; Hofmann, J.; Fleischer, J.; Klemens, J.; Scharfer, P. & Schabel, W. (2020), Identifying the influence of the particle size and morphology of electrode materials on the process of calendering. Conference Brochure, Hrsg. Prof. Arno Kwade, S. D., S. 22.
Abstract
Current developments in the electric mobility sector and the need for the storage of energy from renewable sources lead to a
growing demand for lithium-ion batteries (LIB). Although they provide high energy densities, the increasing requirements
push this technology to its performance limits. Furthermore some of the commonly used electrode raw materials face alarming
political, ecological and economic risks. The DFG-funded project POLiS Cluster of Excellence therefore aims to develop
sustainable battery materials to produce safer batteries with higher performance properties.
In addition to the choice of the material each process step has an impact on future cell performance. High energy densities
are obtained by a properly adjusted calendering process. The compression of the electrode material leads among other improvements
to an increase of the volumetric energy density. Hence, it is of great importance to understand the process of
calendering to achieve satisfying electrochemical cell properties.
This work investigates the influence of material characteristics on the calendering process. One promising post-lithium candidate
is sodium with its corresponding anode material hard carbon. This study focusses on analysing the correlation between
the particle size and morphology of hard carbon and the generated anode properties after calendering. Furthermore the
slurry composition and drying conditions are taken into account. Line load, web tension and temperature are varied calendering
process parameters. Resulting compaction rates and adhesive forces are presented and scanning electron microscopy
images complete the analysis of the material behavior. A stereo camera system quantifies the distortions caused by calendering.
Finally conductivity measurements rate the quality of the calendered anode material.
These results contribute to building a tool for the prediction of the processability of future battery materials.
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