Young investigator research group on electrocatalysis at HZB
Dr. Michelle Browne (here at her graduation ceremony in Dublin) starts now a Young Investigator Group at HZB. © privat
Dr. Michelle Browne establishes her own young investigator group at the HZB . Starting in August, the group is co-funded by the Helmholtz Association for the next five years. The electrochemist from Ireland concentrates on electrolytically active novel material systems and wants to develop next-generation electrocatalysts, for example hydrogen production. At HZB she will find the perfect environment to conduct her research.
Michelle Browne received her PhD in 2016 from the University of Dublin, Trinity College Dublin (TCD), Ireland. She held research fellow positions at universities in Belfast, Prague, and Dublin. She has received prestigious fellowships and awards, for example the Marie Skłodowska-Curie Individual Fellowship, L’Oreal UNESCO Rising Talent UK & Ireland Fellowship and the Clara Immerwahr Award.
Her research focuses on the synthesis of novel catalytically active materials such as transition metal oxides and MXenes. She aims to characterise and optimise these material systems in order to develop next-generation electrolyzer materials that can also be upscaled for industrial use, in order to produce green hydrogen.
Electrocatalysis: Synthesis to Devices
Michelle Browne's research project fits perfectly with the research projects already underway at the Institute for Solar Fuels and within CatLab. "At HZB, I have a wide variety of investigation methods at my disposal, from scanning electron microscopy to the various instruments at BESSY II, which also allow operando analyses," she says.
Michelle Browne's affiliation with the Technische Universität Berlin in the Institute of Chemistry is planned. Starting in the fall, Browne will recruit postdocs and PhD students to join her team.
- Iridium-free catalysts for acid water electrolysis investigatedHydrogen will play an important role, both as a fuel and as a raw material for industry. However, in order to produce relevant quantities of hydrogen, water electrolysis must become feasible on a multi-gigawatt scale. One bottleneck is the catalysts required, with iridium in particular being an extremely rare element. An international collaboration has therefore investigated iridium-free catalysts for acidic water electrolysis based on the element cobalt. Through investigations with various methods, among them experiments at the LiXEdrom at the BESSY II X-ray source in Berlin, they were able to elucidate processes that take place during water electrolysis in a cobalt-iron-lead oxide material as the anode. The study is published in Nature Energy.
- Lithium-sulphur batteries with lean electrolyte: problem areas clarifiedUsing a non-destructive method, a team at HZB investigated practical lithium-sulphur pouch cells with lean electrolyte for the first time. With operando neutron tomography, they could visualise in real-time how the liquid electrolyte distributes and wets the electrodes across multilayers during charging and discharging. These findings offer valuable insights into the cell failure mechanisms and are helpful to design compact Li-S batteries with a high energy density in formats relevant to industrial applications.
- Berlin Science Award goes to Philipp AdelhelmBattery researcher Prof. Dr. Philipp Adelhelm has been awarded the 2024 Berlin Science Award. He is a professor at the Institute of Chemistry at Humboldt University in Berlin (HU) and heads a joint research group at HU and the Helmholtz Zentrum Berlin (HZB). The materials scientist and electrochemist is investigating sustainable batteries, which play a key role in the success of the energy transition. He is one of the leading international experts in the field of sodium-ion batteries.