Surface coating by mechanofusion modulates bulk charging pathways and battery performance of Ni-rich layered cathodes.

ABSTRACT: Ni-rich layered oxides as high-capacity battery cathodes suffer from degradation at high voltages. We utilize a dry surface modification method, mechanofusion (MF), to achieve enhanced battery stability. The simplicity, high yield, and flexibility make it cost-effective and highly attractive for processing at the industrial scale. The underlying mechanisms responsible for performance improvement are unveiled by a systematic study combining multiple probes, e.g., 3D nano-tomography, spectroscopic imaging, in situ synchrotron diffraction, and finite element analysis (FEA). MF affects the bulk crystallography by introducing partially disordered structure, microstrain, and local lattice variation. Furthermore, the crack initiation and propagation pattern during delithiation are regulated and t

SUBMITTER: Hou D 

PROVIDER: S-EPMC9894257 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature