Porous Co₃O₄/NiO@C Chains Assembled from Nanosheets with Excellent Lithium Storage Performance

Abstract

Carbon layers-coated porous Co 3 O 4 /NiO (denoted as PCNO@C) chains are synthesized by the facile solvothermal method and subsequently annealing treatment under an Ar atmosphere, which are assembled from numerous Co 3 O 4 /NiO nanosheets. Benefiting from the unique porous chain structure, the volume change of the electrode is greatly relieved during the long-term cycling processes, and then an excellent cycling stability is obtained (the reversible specific capacity of the 1000th cycle can reach 637.3 mA h g −1 at 5000 mA g −1 ). Besides, a continuous conductive network is constructed by the coated carbon layers and long chains, the movement rate of electrons is effectively accelerated, and the high rate capability is obtained (the high reversible specific capacity of 480.6 mA h g −1 is retained at 10,000 mA g −1 ). This work contributes a new idea to construct porous chain structure anode materials.