Design of porous Co3O4 nanosheets via one-step synthesis as high-performance anode materials for lithium-ion batteries

摘要

The morphology of Co-based zeolitic imidazolate framework is affected by the molar ratio of 2-methylimidazole and Co2+ used during the synthesis. In this study, we found that by further controlling the molar ratio of 2-methylimidazole and Co2+, hexagonal Co(OH)(2) nanosheets can by formed. By calcination of such Co(OH)(2) nanosheets, the original two-dimensional morphology was maintained and hierarchical pores were formed with 2-methylimidazole as the porogen. Such porous Co3O4 nanosheets exhibited good electrochemical performance and delivered a high specific capacity of 850mAhg(-1) at current density of 300mAg(-1) after 100cycles when used as anode of lithium-ion batteries.