Co3O4 nanosheets and Co3O4/carbon allotrope (Co3O4/C) composites have been successfully synthesized as investigated as anode materials for sodium ion batteries (SIBs). Microstructure characterizations have be performed to confirm the formation of Co3O4/C nanohybrids. It has been found that the as-prepared Co3O4, composites exhibit excellent sodium storage properties including superior cycle stability and rate capabilities delivering reversible capacities of 436.9 (for Co3O4/GNSs), 388.5 (for Co3O4/CNTs), and 340.1 mA h g(-1) (Co3O4/CB) at a current density of 50 mA g(-1) after 100 cycles, respectively, which are much higher than that the bare Co3O4 counterpart (219.7 mA h g(-1) at 50 mA g(-1) after 100 cycles). Moreover, reversible capacities 231 mA h g(-1) for Co3O4/GNSs is realized at a high rate of 3.2 A g(-1). The improved electrochemical performance is considered due to the introduction of the carbon-based materials, which not only serve as efficient buffering matrixes to decrease in volume expansion during cycling but also improve the electrode conductivity.