Researchers at Chalmers University of Technology in Sweden have introduced an innovative experimental method to study the ageing of fuel cells, a crucial aspect for improving the efficiency and longevity of fuel cells in heavy-duty hydrogen vehicles. By utilizing scanning electron microscopy (SEM) and transmission electron microscopy (TEM), the team was able to observe how the electrode degrades during a standardized stress test. This research is a significant step towards understanding the degradation of fuel cell components, such as electrodes and membranes, which limits the lifespan of hydrogen fuel-cell-powered vehicles. The study's findings provide insights into the degradation processes at both nano and micro levels, offering valuable information for the development of new materials to enhance fuel cell performance and durability. The new method developed by Chalmers University researchers involves tracking a specific particle within the fuel cell during operation, allowing them to study the degradation of the cathode electrode. Contrary to previous assumptions, disassembling and studying the fuel cell did not affect its performance, leading to a better understanding of the degradation processes over the lifetime of the fuel cell. This knowledge is crucial for designing improved fuel cells with extended lifespans, essential for the commercial success of hydrogen-powered vehicles. The research paves the way for the development of materials that can enhance fuel cell longevity and performance, addressing a key goal highlighted by the U.S. Department of Energy for the successful adoption of fuel cell technology. The project, supported by various research foundations and industry partners, underscores the importance of advancing fuel cell technology for sustainable transportation and energy applications.