Microwave‐assisted Synthesis and Its Reversible Li‐storage Properties of Porous Sheet‐like Co3O4

Porous Co₃O₄ nanosheets were designed and fabricated from common Co(NO₃ )₂ solution without any surfactants or templates under microwave radiation conditions. After the microstructures and morphologies were characterized by scanning electron microscope (SEM ), X‐ray powder diffraction (XRD ), transmission electron microscopy (TEM ), and N₂ absorption/desorption isotherms techniques, the obtained Co₃O₄ nanosheets were applied for reversible Li‐storage, displaying larger capacity, better cycling performance and rate capability, i.e., a reversible specific capacity of ca. 800 mAh /g during initial 30 cycles and a reversible capacity of 450 mAh /g at 2C for Co₃O₄ nanosheets, which were almost twice higher than those for Co₃O₄ nanoparticles. The improved cycling stability could be attributed to the remarkable synergistic effects between porous structures and nanosheet‐like morphologies.