Abstract
Transmission electron microscopy is used to study the formation of microcracks in agglomerated particles of positive electrode (cathode) materials based on Ni-rich layered oxide LiNi0.6Mn0.2Co0.2O2. The effect the magnesium cation additive has on the stability of the material against the accumulation of structural defects and formation of cracks upon prolonged galvanostatic cycling is demonstrated and a mechanism of stress relaxation is proposed.
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ACKNOWLEDGMENTS
The authors thank the Skoltech Advanced Imaging Core Facility (AICF) for giving us access to their scientific equipment.
Funding
This work was supported by the Russian Science Foundation, project no. 23-73-30003.
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Translated by E. Bondareva
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Moiseev, I.A., Golubnichiy, A.A., Pavlova, A.P. et al. Effect of Cation Substitution on the Formation of Microcracks in Ni-Rich Layered Oxides. Bull. Russ. Acad. Sci. Phys. 87, 1449–1454 (2023). https://doi.org/10.3103/S1062873823703471
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DOI: https://doi.org/10.3103/S1062873823703471