Welcome to the Solid-State Battery Materials and Electrodes group. Our group is located at the Battery LabFactory Braunschweig (BLB) and at the Institute of Particle Technology, Faculty of Mechanical Engineering, TU Braunschweig. We are interested in the manufacturing, processing and characterization of solid electrolytes for solid-state batteries as future energy storage systems used in vehicles and aircraft.
Solid-state batteries based on both lithium-ion and lithium-sulfur cells are regarded as promising future energy storage systems, particularly for mobility applications. In solid-state batteries, solid polymers or oxides are used as solid electrolytes. Compared to liquid electrolytes, solid electrolytes provide significantly higher safety levels and simpler cell structures. Moreover, solid electrolytes can be used in combination with active materials that are currently problematic for continuous operation. The use of metallic lithium as the anode and the elimination of the separator are also expected to double the energy density, which is very important in mobility application (vehicle and aircraft). Furthermore, the higher mechanical load-bearing capacity of solid-state batteries offers a key advantage with regard to the use in aircraft.
Due to all these reasons, solid-state batteries have been proved as a key future focus topic. However, there are still some challenges which need to be overcome. On the one hand, these battery systems require significantly more complex materials in comparison to conventional lithium-ion batteries. For example, in order to ensure stability against solid electrolytes, it could be a possibility to apply coatings in the nanometer range to active material particles. For the production of these materials, processes are being developed in the Battery LabFactory Braunschweig, bearing in mind the production of sufficient quantities of material for further processing into larger cells. On the other hand, the production of solid-state battery electrodes is currently limited to the laboratory scale, since the direct transfer of processing techniques for conventional lithium-ion batteries is not possible. With this aim, new processes for manufacturing the electrodes are being researched depending on the used materials.
Titscher, P., Zellmer, S., Burmeister, C.F., Schmidt, L.O., Breitung-Faes, S., Garnweitner, G., Kwade, A. Evaluation of Processes for Mechanical Manufacturing of Composite Materials for Li-Sulfur Batteries (2018) Chemie-Ingenieur-Technik, 90 (4), pp. 513-520. DOI: 10.1002/cite.201700121
Zellmer, S., Titscher, P., Wienken, E., Kwade, A., Garnweitner, G.; Fabrication of carbon-sulphur composites via a vibration mill process as cathode material for lithium sulphur batteries (2017) Energy Storage Materials, 9, pp. 70-77. DOI: 10.1016/j.ensm.2017.06.010
Wahl, T., Zellmer, S., Hanisch, J., Garnweitner, G., Ahlswede, E., Thin indium tin oxide nanoparticle films as hole transport layer in inverted organic solar cells (2016) Thin Solid Films, 616, pp. 419-424. DOI: 10.1016/j.tsf.2016.09.012
Zellmer, S., Lindenau, M., Michel, S., Garnweitner, G., Schilde, C., Influence of surface modification on structure formation and micromechanical properties of spray-dried silica aggregates (2016) Journal of Colloid and Interface Science, 464, pp. 183-190. DOI: 10.1016/j.jcis.2015.11.028
Einert, M., Ostermann, R., Weller, T., Zellmer, S., Garnweitner, G., Smarsly, B.M., Marschall, R., Hollow ?-Fe2O3 nanofibres for solar water oxidation: improving the photoelectrochemical performance by formation of ?-Fe2O3/ITO-composite photoanodes, (2016) Journal of Materials Chemistry A, 4 (47), pp. 18444-18456. DOI: 10.1039/c6ta06979g
Runge, G., Preller, T., Zellmer, S., Blankemeyer, S., Kreuz, M., Garnweitner, G., Raatz, A., SpineMan: Design of a soft robotic spine-like manipulator for safe human-robot interaction (2015) IEEE International Conference on Intelligent Robots and Systems, 2015-December, art. no. 7353508, pp. 1103-1110. DOI: 10.1109/IROS.2015.7353508
Zellmer, S., Kockmann, A., Dosch, I., Temel, B., Garnweitner, G., Aluminum zinc oxide nanostructures with customized size and shape by non-aqueous synthesis (2015) CrystEngComm, 17 (36), pp. 6878-6883. DOI: 10.1039/c5ce00629e
Zellmer, S., Grote, C., Cheema, T.A., Garnweitner, G., Small-molecule stabilization mechanisms of metal oxide nanoparticles (2015) Colloid Process Engineering, pp. 73-92. DOI: 10.1007/978-3-319-15129-8_4
Kockmann, A., Hesselbach, J., Zellmer, S., Kwade, A., Garnweitner, G., Facile surface tailoring of metal oxide nanoparticles via a two-step modification approach (2015) RSC Advances, 5 (75), pp. 60993-60999. DOI: 10.1039/c5ra08932h
Runge, G., Zellmer, S., Preller, T., Garnweitner, G., Raatz, A., Actuation principles for the bioinspired soft robotic manipulator spineman(2015) 2015 IEEE International Conference on Robotics and Biomimetics, IEEE-ROBIO 2015, art. no. 7418955, pp. 1329-1336. DOI: 10.1109/ROBIO.2015.7418955