Modernisation of BESSY II+ light source
Antje Vollmer is spokeswoman for BESSY II and project lead of the BESSY II+ project. She says: "BESSY II is rising to the scientific and societal challenges. The positive feedback from users encourages us in this!" © HZB/M. Setzpfandt
The 16th edition of the BESSY@HZB user meeting will take place on 11-12 December 2024 in Berlin-Adlershof. 400 participants exchange information about research at BESSY II. This year, Romania is the country of honour. © HZB/M. Setzpfandt
The focus of the User Meeting 2024: Helmholtz-Zentrum Berlin (HZB) presents the BESSY II+ upgrade programme. It enables world-class research at BESSY II to be further expanded and new concepts to be tested with regard to the successor source BESSY III.
Every year in December, HZB invites the users of BESSY II light source to Adlershof for an exchange of expertise. Research highlights of the year are presented and the wishes of the user community regarding future developments are discussed.
"BESSY II is now in its 27th year of operation," says Antje Vollmer, BESSY II spokesperson. "The expectations of our users have changed over the years. They want additional infrastructures, laboratories close to the beamlines and have high expectations of the sample environment. Research interests have also changed. For example, we are seeing a strong interest in battery research and energy conversion processes."
This is where the BESSY II+ project comes in. The aim is for BESSY to become an "operando synchrotron for the energy transition".
A bridge to the future: the BESSY II+ project
BESSY II+ offers new experimental possibilities, especially for operando investigations. These make it possible, for example, to watch batteries or solar cells "at work". In addition to the new "operando" possibilities, the BESSY II+ project also focuses on the two topics of "modernisation" and "sustainability". Sustainability involves, among other things, the utilisation of waste heat from the BESSY II experimental hall. Machine learning and artificial intelligence will also be even more integrated into many processes.
Funding of BESSY II+
As part of the modernisation project, the HZB has received additional funding from the Ministry of Education and Research (BMBF). "Invest BESSY II+" covers the most important investments for the project, which the BMBF is supporting to the tune of 17.45 million euros. This funding secures the development of new infrastructures, such as the SoTeXS instrument, which stands for soft-to-tender X-ray spectroscopy. This is a comprehensive concept for operando, metrological, multi-modal experiments that will be of great benefit to research into batteries and materials for energy applications.
Antje Vollmer emphasises: "BESSY II is facing up to the scientific and social challenges. The positive feedback from users encourages us to do so!"
- Catalysis research with the X-ray microscope at BESSY IIContrary to what we learned at school, some catalysts do change during the reaction: for example, certain electrocatalysts can change their structure and composition during the reaction when an electric field is applied. The X-ray microscope TXM at BESSY II in Berlin is a unique tool for studying such changes in detail. The results help to develop innovative catalysts for a wide range of applications. One example was recently published in Nature Materials. It involved the synthesis of ammonia from waste nitrates.
- BESSY II: Magnetic ‘microflowers’ enhance magnetic fields locallyA flower-shaped structure only a few micrometres in size made of a nickel-iron alloy can concentrate and locally enhance magnetic fields. The size of the effect can be controlled by varying the geometry and number of 'petals'. This magnetic metamaterial developed by Dr Anna Palau's group at the Institut de Ciencia de Materials de Barcelona (ICMAB) in collaboration with her partners of the CHIST-ERA MetaMagIC project, has now been studied at BESSY II in collaboration with Dr Sergio Valencia. Such a device can be used to increase the sensitivity of magnetic sensors, to reduce the energy required for creating local magnetic fields, but also, at the PEEM experimental station, to study samples under much higher magnetic fields than currently possible.
- Innovative battery electrode made from tin foamMetal-based electrodes in lithium-ion batteries promise significantly higher capacities than conventional graphite electrodes. Unfortunately, they degrade due to mechanical stress during charging and discharging cycles. A team at HZB has now shown that a highly porous tin foam is much better at absorbing mechanical stress during charging cycles. This makes tin foam an interesting material for lithium batteries.