Asynchronous domain dynamics and equilibration in layered oxide battery cathode

Zhichen Xue, Nikhil Sharma, Feixiang Wu (), Piero Pianetta, Feng Lin, Luxi Li (), Kejie Zhao () and Yijin Liu ()
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Zhichen Xue: Central South University
Nikhil Sharma: Purdue University
Feixiang Wu: Central South University
Piero Pianetta: Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory
Feng Lin: Department of Chemistry, Virginia Tech
Luxi Li: X‐ray Science Division, Argonne National Laboratory
Kejie Zhao: Purdue University
Yijin Liu: The University of Texas at Austin

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract To improve lithium-ion battery technology, it is essential to probe and comprehend the microscopic dynamic processes that occur in a real-world composite electrode under operating conditions. The primary and secondary particles are the structural building blocks of battery cathode electrodes. Their dynamic inconsistency has profound but not well-understood impacts. In this research, we combine operando coherent multi-crystal diffraction and optical microscopy to examine the chemical dynamics in local domains of layered oxide cathode. Our results not only pinpoint the asynchronicity of the lithium (de)intercalation at the sub-particle level, but also reveal sophisticated diffusion kinetics and reaction patterns, involving various localized processes, e.g., chemical onset, reaction front propagation, domains equilibration, particle deformation and motion. These observations shed new lights onto the activation and degradation mechanisms of state-of-the-art battery cathode materials.

Date: 2023
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DOI: 10.1038/s41467-023-44222-x

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