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Updated: Mar 26, 2026
In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries
Published on: November 10, 2014
Mitigated phase transition during first cycle of a Li-rich layered cathode studied by in operando synchrotron X-ray
Bohang Song1, Sarah J Day2, Tan Sui1
1MBLEM, Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK. alexander.korsunsky@eng.ox.ac.uk.
Abstract:
In operando synchrotron X-ray powder diffraction (SXPD) studies were conducted to investigate the phase transition of Li-rich Li(Li0.2Ni0.13Mn0.54Co0.13)O2 and Cr-doped Li(Li0.2Ni0.13Mn0.54Co0.03Cr0.10)O2 cathodes during the first charge/discharge cycle. Crystallographic (lattice parameters) and mechanical (domain size and microstrain) information was collected from SXPD full pattern refinement. It was found that Cr substitution at Co-site benefits in suppressing the activation of Li2MnO3 domains upon 1st charge, and thus mitigates the phase transition. As a consequence, Cr-doped layered cathode holds a better reversibility in terms of a full recovery of both lattice parameters and nano-domain size after a whole charge/discharge cycle. The effects of different cycling rates on the structural change were also discussed.
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