Multi-hierarchical heterostructure of GO/ NiCo2O4/Co3O4 for high power lithium-ion batteries

The application of high-rate lithium-ion batteries (LIBs) has been impeded by the sluggish kinetics, poor conductivity and volumetric expansion of anode materials. Rational design of the anode materials is es-sential for the rate performance of LIBs. Herein, a multihierarchical heterostructure composite composed of graphene oxide (GO)nanosheets, NiCo2O4 nanorods and Co3O4 nanocubes was synthesized via a self-tem-plate method. Owing to the elaborate nanostructure and synergy of the components, the anode attained favorable kinetics, structural stability and high conductivity and delivered a reversible capacity of 1283 mA h g-1 at 0.2 A g-1, an impressive rate capacity of 649.1 mA h g-1 at 10 A g-1 and a long-term cycle performance with a capacity of 857 mA h g-1 retained after 1100 cycles at 1 A g-1. Furthermore, the full cell assembled with the as-prepared anode and commercial cathode also delivered a high-rate capacity of 72 mA h g-1 at 1 A g-1 and a remarkable capacity retention of 92.3% after 100 cycles, demonstrating the promising potential of the anode in practical high-power LIBs.(c) 2023 Published by Elsevier B.V.