Dynamic Structural Evolution News Today

Manganese-based layered oxides show promise as cathode materials for sodium-ion batteries (SIBs). However, several challenges including sluggish Na+ kinetics, complex phase transitions, and poor air stability hinder their practical application. Herein, we proposed a dual-function strategy that not only precisely manipulates dynamic structural evolution from layered to tunnel structure, but also effectively suppresses Na+/vacancy and charge ordering by inhibiting electron delocalization. A series...

The pursuit of high energy density while achieving long cycle life remains a challenge in developing transition metal (TM) oxide cathode materials for sodium-ion batteries (SIBs). Here, we present a concept of precisely manipulating structural evolution via local coordination chemistry regulation to design high-performance composite cathode materials. The controllable structural evolution process is realized by tuning magnesium content in Na0.6Mn1−xMgxO2, which is elucidated by a combination o...

Developing high-voltage cathode materials for sodium-ion batteries (SIBs) is both challenging and extremely urgent. Here, we report an abnormal high-voltage Na2/3Ni1/3Sn2/3O2 cathode material with a P2-structure stoichiometric composition and an O3-type layered phase. Using a classic P2-type layered oxide cathode Na2/3Ni1/3Mn2/3O2 as a model system, we demonstrate the accurate manipulation of orbital hybridization between transition metal and oxygen atoms to regulate the redox potential through ...