Design of porous Co3O4 nanosheets via one-step synthesis as high-performance anode materials for lithium-ion batteries
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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 850 mAh g−1 at current density of 300 mA g−1 after 100 cycles when used as anode of lithium-ion batteries.
KeywordsPorous Co3O4 Nanosheets One-step synthesis Li-ion battery
This study is financially supported by Natural Science Key Project of the Jiangsu Higher Education Institutions (15KJA220001), Jiangsu Province Six Talent Peaks Project (2016-XCL-043), the Youth Fund of Natural Science Foundation of Jiangsu Province (BK20170919), the National Science Foundation for Young Scientists of China (21808112), and Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).
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