Template-assisted synthesis of porous Co3O4 nanosheet with excellent electrochemical performance for rechargeable lithium-ion batteries

The high-performance electrode materials with great rate capability and long cycling life are partly attributed to the microstructure and morphology of the as-prepared electrode materials for lithium-ion batteries (LIBs). Here, we report a facile and efficient synthetic method utilizing quantitative filter papers with negligible impurity residues in the calcining process as a sacrificial template to prepare porous Co 3 O 4 nanosheet employed as anode for LIBs. In consequence, it presents extraordinary cycling performance, e.g., superior initial specific capacity of 1326mAh g −1 and a high reversible specific capacity of 1000 mAh g −1 after 50 cycles at a current density of 100 mAg −1 . The excellent electrochemical performance is ascribed to the typical porous sheet-like structure facilitating Li-ion diffusion and electron transport and alleviating considerable volume expansion in the process of lithiation/delithiation. Herein, the low-cost and eco-friendly synthetic method of porous Co 3 O 4 nanosheet could provide some enlightenment in practical application for LIBs. Graphic abstract