Unlocking the mystery behind the performance decline in a promising cathode material, Scientists have discovered the culprit behind
Scientists have discovered the culprit behind the performance fade in nickel-rich cathodes for lithium-ion batteries. The team’s new analysis method was key to the discovery.for electric vehicles has been a remarkable success story. Yet, the question arises: What changes to battery materials will spur further advances to extend driving range and lower costs?
Method used for studying failure mechanisms in battery materials at sizes from 1 to 1000 particles. HEXRD=high energy X-ray diffraction; MCRC=multi-crystal rocking curve; SDXM=scanning diffraction X-ray microscopy. Lower right: lattice shape change with charge and discharge. Our method should also be useful to understanding failure mechanisms in other battery types than present-day lithium-ion.
To uncover the mechanism, the team devised a pioneering method that combines multiscale X-ray diffraction and high-resolution electron microscopy. These materials analyses were done at the Advanced Photon Source (The problem with electron microscopy alone is that it only provides a snapshot of a small area on a single crystal,” said Materials ScientistAnd while X-ray diffraction offers insights into internal structures of many particles, it lacks surface-level information.
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