Functional Materials Group
Renewable energy conversion and storage are relevant topics in applied research today, since the use of non-fossil energy sources is essential for the reduction of CO2 emissions. Solar and wind energy harvesting combined with chemical energy storage in batteries or fuels like hydrogen are essential processes, which need to be improved in efficiency, long-term stability and scalability. Our goal is to contribute to the development of cost effective scalable solutions for energy conversion and storage.
Improved Photoelectrochemical Performance of Nb-substituted LaTi(O,N)3
In this study, the influence of Ti-site substitution in the perovskite-related oxynitride LaTi(O,N)3 is investigated. An improved photocurrent density at 1.23 V versus RHE is obtained for Nb-substituted LaTi(O,N)3 particle-based photoanodes.
V. Werner, J. Schoiber, G. J. Redhammer, T. Berger and S. Pokrant, Improved photoelectrochemical performance of Nb-substituted LaTi(O,N)3. Appl. Phys. Lett. 119, 153903 (2021). https://doi.org/10.1063/5.0061348
Chemical preintercalation of H2V3O8–reduced Graphene Oxide Composites for Improved Na- and Li-ion Battery Cathodes
Preintercalation of H2V3O8 with Na+ and Li+ is shown via a soft-chemistry synthesis. The combination of preintercalation and composite formation of H2V3O8 leads to an increase of the initial capacity of 58 % for SIBs and 48 % for LIBs in comparison to unmodified H2V3O8.
D. Söllinger, T. Berger, G. J. Redhammer, J. Schoiber and S. Pokrant, Chemical preintercalation of H2V3O8-rGO composites for improved Na- and Li-ion battery cathodes. ChemElectroChem, 2021. https://doi.org/10.1002/celc.202101077
Poster presentation by Valérie Werner at the Gordon Research Conference in Italy
Valérie Werner presented her research at the Gordon Research Conference on Renewable Energy: Solar Fuels in Barga (Lucca), Italy. This conference offered a variety of networking opportunities and scientific talks and discussions in the research field of artificial photosynthesis and solar water-splitting.
Congratulations to Daniela Söllinger!
She won the 3rd place of the Young Investigators Award awarded by the Paris Lodron University of Salzburg for doctoral students who present work which is highly significant for the respective field or has a potential high impact in the future.
We are pleased that the following students are currently writing their bachelor thesis with us:
- Klammer, Peter Fabrication of photoanodes by scaleable processes
- Taniguchi, Cosmo Better performing Li-ion cathodes via improved electrode preparation
- Zivkovic, Ligia Morphology variations of LaTiO2N particles for improved solar water splitting
We are pleased that the following students are currently writing their master thesis with us:
- Czernastek, Hubert Photoelectrochemical Properties of BiVO4 Photoanodes
- Hörndl, Julian Morphology and photocatalytic properties of oxynitride particles
- Praxmair, Jakob Effects of cocatalyst deposition on the photocatalytic activity of oxynitride particles
New device characterization methods installed and operational!
in-operando XRD Faraday efficiency measurement Set-up
Infrastructure project BioMat TEM was granted!
The functional materials group is proud of being part of the project team BioMat-TEM. The aim of this project is the upgrade of the local transmission electron microscope with a cryo unit and an energy filter (1,9 MEu). It will enable subnanometer imaging and analysis of beam sensitive materials like energy materials or biomaterials.
For more information, click here and here.
Showcases for research enabled by the energy filter/cryo upgrade
Oxidation state determination of CoOx cocatalyst nanoparticles with a size of 5-40 nm by core loss EELS. The cocatatalysts are deposited on the photocatalyst LaTiO2N (adapted from Pokrant S. et al., Materials Today Energy, 5, 2017, 158)
Cryo transmission electron micrograph of extracellular vesicles, scaling bar 100 nm (adapted from Corso G., Meisner-Kober N. et al., Journal of Extracellular Vesicles, 8, 2019, 1663043 )