High interfacial storage capability of porous NiMn₂O₄/C hierarchical tremella-like nanostructures as the lithium ion battery anode

Porous hierarchical NiMn₂O₄/C tremella-like nanostructures are obtained through a simple solvothermal and calcination method. As the anode of lithium ion batteries (LIBs), porous NiMn₂O₄/C nanostructures exhibit a superior specific capacity and an excellent long-term cycling performance even at a high current density. The discharge capacity can stabilize at 2130 mA h g^-1 within 350 cycles at a current density of 1000 mA g^-1. After a long-term cycling of 1500 cycles, the capacity is still as high as 1773 mA h g^-1 at a high current density of 4000 mA g^-1, which is almost five times higher than the theoretical capacity of graphite. The porous NiMn₂O₄/C hierarchical nanostructure provides sufficient contact with the electrolyte and fast three-dimensional Li⁺ diffusion channels, and dramatically improves the capacity of NiMn₂O₄/C via interfacial storage. This journal is