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 Co3O4 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 Co3O4 nanosheet could provide some enlightenment in practical application for LIBs.

Automated summary

The study demonstrated exceptional electrochemical performance of porous Co3O4 nanosheet as an anode for LIBs, synthesized using quantitative filter papers as sacrificial template, which facilitated Li-ion diffusion and electron transport, leading to improved cycling performance.