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As a promising high-capacity anode material for Li-ion batteries, NiMn 2 O 4  always suffers from the poor intrinsic conductivity and the architectural collapse originating from the volume expansion during cycle. Herein, a combined structure and architecture modulation is proposed to tackle concurrently the two handicaps, via a facile and well-controlled solvothermal approach to synthesize NiMn 2 O 4 /NiCo 2 O 4  mesocrystals with superlattice structure and hollow multi-porous architecture. It is demonstrated that the obtained NiCo 1.5 Mn 0.5 O 4  sample is made up of a new mixed-phase NiMn 2 O 4 /NiCo 2 O 4  compound system, with a high charge capacity of 532.2 mAh g −1  with 90.4% capacity retention after 100 cycles at a current density of 1 A g −1 . The enhanced electrochemical performance can be attributed to the synergistic effects of the superlattice structure and the hollow multi-porous architecture of the NiMn 2 O 4 /NiCo 2 O 4  compound. The superlattice structure can improve ionic conductivity to enhance charge transport kinetics of the bulk material, while the hollow multi-porous architecture can provide enough void spaces to alleviate the architectural change during cycling, and shorten the lithium ions diffusion and electron-transportation distances.

Porous Hollow Superlattice NiMn2O4/NiCo2O4 Mesocrystals as a Highly Reversible Anode Material for Lithium-Ion Batteries