Fabrication of NiMn2O4/C hollow spheres with a trilaminar shell structure as an anode material for sodium-ion batteries

Abstract

NiMn₂O₄/C hollow spheres with sandwich-structured shells were fabricated by a hydrothermal method. Leveraging the mesoporous design of the carbon hollow spheres, NiMn₂O₄ nanosheets were evenly dispersed on both the inner and outer surfaces of the carbon shells. NiMn₂O₄/C demonstrated excellent rate capability and prolonged cycling durability for sodium ion storage.