Solution-gel-based surface modification of LiNi_0.5Mn_1.5O_4-δ with amorphous Li-Ti-O coating.

ABSTRACT: LNMO (LiNi_0.5Mn_1.5O_4-δ) is a high-energy density positive electrode material for lithium ion batteries. Unfortunately, it suffers from capacity loss and impedance rise during cycling due to electrolyte oxidation and electrode/electrolyte interface instabilities at high operating voltages. Here, a solution-gel synthesis route was used to coat 0.5-2.5 μm LNMO particles with amorphous Li-Ti-O (LTO) for improved Li conduction, surface structural stability and cyclability. High-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) analysis coupled with energy dispersive X-ray (EDX) showed Ti-rich amorphous coatings/islands or Ti-rich spinel layers on many of the LTO-modified LNMO facets, with a thickness varying from about 1 to 1

SUBMITTER: Ulu Okudur F 

PROVIDER: S-EPMC10634291 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature