Multishelled Ni‐Rich Li(Ni<i>_x</i>Co<i>_y</i>Mn<i>_z</i>)O₂ Hollow Fibers with Low Cation Mixing as High‐Performance Cathode Materials for Li‐Ion Batteries

Abstract

<b>A simple seaweed biomass conversion strategy</b> is proposed to synthesize highly porous multishelled Ni-rich Li(Ni <i>_x</i> Co <i>_y</i> Mn <i>_z</i> )O₂ hollow fibers with very low cation mixing. The low cation mixing results from the cation confinement by the novel "egg-box" structure in the alginate template. These hollow fibers exhibit remarkable energy density, high-rate capacity, and long-term cycling stability when used as cathode material for Li-ion batteries.