Pillared Layered Transition Metal Oxide for Na-Ion Batteries

Na-ion batteries employing earth-abundant elements are low-cost alternatives to Li-ion batteries. Among the various intercalation materials, the layered transition metal oxide emerges as a promising cathode material thanks to its high energy density and compositional tunability. However, these materials often suffer from air instability and high-voltage structural degradation, which limit their practical reversible capacity and energy density. To address these issues, our research focuses on structural pillaring as a stabilization strategy for layered oxides. Our findings demonstrate that introducing pillar ions effectively enhances the stability of the layered structure, providing a pathway to improve the electrochemical performance of layered cathodes in Na-ion batteries.