20 Years Russian-German Joint Laboratory at BESSY II
To mark its 20th anniversary, the Russian-German Laboratory at the BESSY II storage ring for synchrotron radiation in Berlin is organising an online workshop on 18 and 19 November. Scientists will discuss the future perspectives of Russian-German cooperation as well as innovative projects and new goals of the laboratory.
Since its foundation two decades ago, numerous scientists from Russia and Germany have worked at the Russian-German Joint Laboratory and have since published around 770 publications. The research cooperation is now supported by eight partner organisations - Freie Universität Berlin, Helmholtz-Zentrum Berlin, Technische Universität Dresden and Technische Universität Bergakademie Freiberg. They are joined by St. Petersburg State University, the Ioffe Institute in St. Petersburg and the Kurchatov Institute and Shubnikov Institute of Crystallography in Moscow.
The laboratory receives funding from the Federal Ministry of Education and Research. Messreisen supports the HZB and the German-Russian Centre of Excellence G-RISC, which is funded by the German Academic Exchange Service (DAAD) with funds from the Federal Foreign Office.
The researchers will use the anniversary workshop to discuss current highlights from their research. Expert lectures will deal with the magnetism of two-dimensional crystals, i.e. novel materials that can make the computer hardware of the future more powerful and energy-efficient, as well as new battery materials and the question of why novel materials for solar cells show unexpectedly high efficiency. "What does the future hold for the Russian-German Laboratory?" asks Eckart Rühl, Professor of Physical Chemistry at the Free University of Berlin and coordinator of the research laboratory. New synchrotron radiation sources are already being planned in Germany and Russia, he says. "BESSY II will continue to provide excellent opportunities for the Russian-German Laboratory in the coming decade. And the planned successor source BESSY III will make previously unfeasible experiments possible!" emphasises Prof. Dr. Jan Lüning, scientific director of Helmholtz-Zentrum Berlin.
Program of the Workshop on 18 and 19 November 2021
- BESSY II: How intrinsic oxygen shortens the lifespan of solid-state batteriesAlthough solid-state batteries (SSBs) demonstrate high performance and are intrinsically safe, their capacity currently declines rapidly. A team from the TU Wien, Humboldt-University Berlin and HZB has now analysed a TiS₂|Li₃YCl₆ solid-state half-cell in operando at BESSY II using a special sample environment that allows for non-destructive investigation under real operating conditions. Data obtained by combination of soft and hard X-ray photoelectron spectroscopy (XPS and HAXPES) revealed a new degradation mechanism that had not previously been identified in solid-state batteries. They have gained some surprising insights, particularly regarding the harmful role played by intrinsic oxygen. This study provides valuable information for improving design and handling of such batteries.
- Spintronics at BESSY II: Real-time analysis of magnetic bilayer systemsSpintronic devices enable data processing with significantly lower energy consumption. They are based on the interaction between ferromagnetic and antiferromagnetic layers. Now, a team from Freie Universität Berlin, HZB and Uppsala University has succeeded in tracking, for each layer separately, how the magnetic order changes after a short laser pulse has excited the system. They were also able to identify the main cause of the loss of antiferromagnetic order in the oxide layer: the excitation is transported from the hot electrons in the ferromagnetic metal to the spins in the antiferromagnet.
- Electrocatalysts: New model for charge separation at the solid-liquid interfaceHydrogen is at the heart of the transition to carbon neutrality, as both an energy carrier and a reagent for green chemistry. However, large-scale production of hydrogen via electrolysis, as well as the production of many other chemical products, requires significantly cheaper and more efficient catalysts. A precise understanding of the electrochemical processes that take place at the interface between the solid catalyst and the liquid medium is highly useful for developing better electrocatalysts. In the journal Nature Communications, an European team has now presented a powerful model that determines charge separation at the interface, the formation of the electric double layer and local electric potential variations, and the resulting influence on the catalytic activity.