A scientific team tracked the real-time movement of lithium ions inside layered lithium nickel-rich oxides.
, the researchers explain that it had been assumed that the mechanism by which lithium ions are stored in battery materials is uniform across the individual active particles. What they found, however, was that during the charge-discharge cycle, lithium storage is anything but uniform.
In particular, by tracking how light interacts with active particles during battery operation under a microscope, the scientists observed distinct differences in lithium storage during the charge-discharge cycle in nickel-rich manganese cobalt oxide . “Our model provides insights into the range over which lithium-ion diffusion in NMC varies during the early stages of charging,” co-first author Shrinidhi S. Pandurangi said in a media statement. “Our model predicted lithium distributions accurately and captured the degree of heterogeneity observed in experiments. These predictions are key to understanding other battery degradation mechanisms such as particle fracture.
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