High-voltage Ni-rich cathodes stabilized with dual gradients

Abstract

The development of high-voltage Ni-rich cathodes is critical to boost the energy density of a lithium-ion battery (LIB), while a series of chemical and microstructural degradations limit its durable operation. In a recent paper by Liu et al. published at Nature Energy, a surface layer with a compositional and structural dual-gradient design was constructed on a Ni-rich cathode to significantly enhance its cycle stability at high voltages, paving the way toward applications in long-range electric vehicles.