From P3 to P2: Synthesis and Role of Morphology in Li-Substituted Layered Oxides for Na-Ion Batteries.

ABSTRACT: Li-substituted P-type layered oxides with different morphologies and polymorphisms are investigated as positive electrode materials for sodium-ion batteries. In situ temperature-resolved X-ray diffraction (XRD) and spatially resolved synchrotron micro-XRD revealed the phase evolution during synthesis. For the first time, a P2 shell is shown to nucleate at the P3 particle surface, consistent with Na concentration gradients. The intermediate Li₂MnO₃, formed in the presence of Na₂CO₃, can be suppressed by using Na₂O₂ as Na source. Ni_1/4Mn_3/4(OH)₂ is also tested as a precursor, allowing for faster P2 crystallization from P3. Three samples with different polymorphisms and morphologies are t

SUBMITTER: Xu M 

PROVIDER: S-EPMC12706827 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature