Journal article

Publication year: 2021

Pages: 100465-

Journal: Cell Reports Physical Science

Volume number: 2

Issue number: 6

Open access status: Gold

DOI Link: https://doi.org/10.1016/j.xcrp.2021.100465

Publisher: Elsevier

Abstract: 
Laboratory research into bulk-type solid-state batteries (SSBs) has been focused predominantly on powder-based, pelletized cells and has been sufficient to evaluate fundamental limitations and tailor the constituents to some degree. However, to improve experimental reliability and for commercial implementation of this technology, competitive slurry-cast electrodes are required. Here, we report on the application of an approach guided by design of experiments (DoE) to evaluate the influence of the type/content of polymer binder and conductive carbon additive on the cyclability and processability of Li1+x(Ni0.6Co0.2Mn0.2)(1-x)O-2 (NCM622) cathodes in SSB cells using lithium thiophosphate solid electrolytes. The predictions are verified by charge-discharge and impedance spectroscopy measurements. Furthermore, structural changes and gas evolution are monitored via X-ray diffraction and differential electrochemical mass spectrometry, respectively, in an attempt to rationalize and support the DoE results. In summary, the optimized combination of polymer binder and conductive carbon additive leads to high electrochemical performance and good processability.

Harvard Citation style: Teo, J., Strauss, F., Tripkovic, D., Schweidler, S., Ma, Y., Bianchini, M., et al. (2021) Design-of-experiments-guided optimization of slurry-cast cathodes for solid-state batteries, Cell Reports Physical Science, 2(6), p. 100465. https://doi.org/10.1016/j.xcrp.2021.100465

APA Citation style: Teo, J., Strauss, F., Tripkovic, D., Schweidler, S., Ma, Y., Bianchini, M., Janek, J., & Brezesinski, T. (2021). Design-of-experiments-guided optimization of slurry-cast cathodes for solid-state batteries. Cell Reports Physical Science. 2(6), 100465. https://doi.org/10.1016/j.xcrp.2021.100465