<i>Operando</i> single-particle imaging reveals that asymmetric ion flux contributes to capacity degradation in aged Ni-rich layered cathodes

Authors: Zhengyan Lun, Alice J. Merryweather, Amoghavarsha Mahadevegowda, Shrinidhi S. Pandurangi, Chao Xu, Simon Fairclough, Vikram S. Deshpande, Norman A. Fleck, Caterina Ducati, Christoph Schnedermann, Akshay Rao, Clare P. Grey

Published: 2025-03-24

DOI: 10.1039/d5ee00267b

Source: Full article

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Abstract

Using an operando optical scattering technique, we identify markedly asymmetric Li-ion flux in aged single crystalline NMC cathodes, primarily caused by an uneven growth of rocksalt phase across the particle surface.