Grape-Like Fe3O4 Agglomerates Grown on Graphene Nanosheets for Ultrafast and Stable Lithium Storage

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• 作者：Liya Qi ; Yuelong Xin ; Zicheng Zuo ; Chengkai Yang ; Kai Wu ; Bin Wu ; Henghui Zhou
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：July 13, 2016
• 年：2016
• 卷：8
• 期：27
• 页码：17245-17252
• 全文大小：696K
• 年卷期：0
• ISSN：1944-8252

文摘

An in situ simple and effective synthesis method is effectively exploited to construct MOF-derived grape-like architecture anchoring on nitrogen-doped graphene, in which ultrafine Fe₃O₄ nanoparticles are uniformly dispersed (Fe₃O₄@C/NG). In this hybrid hierarchical structure, new synergistic features are accessed. The graphene oxide plane with functional groups is expected to alleviate the aggregation problem in the MOFs’ growth. Moreover, the morphology and size of iron-based MOFs and carbon content are conveniently controlled by controlling the solution concentration of precursor. Through making use of in situ carbonization of the organic ligands in MOFs, Fe₃O₄ subunits are effectively protected by 3D interconnected conductive carbon at microscale. Consequently, when applied as anode materials, even as high as 10 A g^–1 after 1000 cycles, Fe₃O₄@C/NG still maintains as high as 458 mA h g^–1.