Taegyu Kim

Stabilizing High-Voltage Operation in O3-Type Na-Layered Cathodes by Suppressing Distortion-Driven Fe Migration

Abstract Fe-based O3-type Na-layered oxides such as Na[Ni1/3Fe1/3Mn1/3]O2 are attractive cathodes based on earth-abundant elements, yet their high-voltage operation is limited by voltage decay and capacity fading. Here, we identify a distortion−migration cascade initiated by Fe3+...