A team of chemists at Cornell University has developed an electron microscopy technique with the ability to record real-time video of the internal chemical processes that affect the condition of batteries.
Identification through the electron microscopy system
The group led by Prof. Yao Yang has succeeded, using an operating transmission electron microscopy system, to observe precisely how the energetic materials of the batteries react under extreme thermal conditions. The images obtained allow to see from the degradation of the components to the dynamics of catalyst activation, with temperature ranges from -50 °C to 300 °C.
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The project has benefited from the collaboration of Erik Thiede’s group, who has developed advanced data analysis algorithms to process the films generated by the microscopy. These artificial intelligence systems make it possible to identify failure patterns, chemical transformations and other complex phenomena at solid-liquid interfaces.
This synergy between high-precision hardware and machine learning software is what has made it possible to study in detail processes that were previously invisible. This is a new paradigm in the diagnosis of energetic material failures.
Although the current focus is on electric vehicle batteries, this technique has the potential to be extended to other energy systems. The team has also used it in the design of nanocatalysts for sustainable fuels and for the production of green hydrogen. production of green hydrogen by decomposing water.
Furthermore, this research has been developed with the support of institutions such as PARADIM, the Kavli Institute and the Atkinson Center at Cornell, which evidences its relevance for the development of sustainable technologies.
The findings of this study open the door to a generation of batteries that are more adaptable to climate and fast charging requirements. Understanding what happens at the nanoscale during charge and discharge cycles, especially under adverse conditions, is critical to designing reliable energy devices.
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Source and photo: Cornell University