Native lattice strain induced structural earthquake in sodium layered oxide cathodes.

ABSTRACT: High-voltage operation is essential for the energy and power densities of battery cathode materials, but its stabilization remains a universal challenge. To date, the degradation origin has been mostly attributed to cycling-initiated structural deformation while the effect of native crystallographic defects induced during the sophisticated synthesis process has been significantly overlooked. Here, using in situ synchrotron X-ray probes and advanced transmission electron microscopy to probe the solid-state synthesis and charge/discharge process of sodium layered oxide cathodes, we reveal that quenching-induced native lattice strain plays an overwhelming role in the catastrophic capacity degradation of sodium layered cathodes, which runs counter to conventional perception-phase transition an

SUBMITTER: Xu GL 

PROVIDER: S-EPMC8795208 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature