Synthesis of Two-Dimensional CoS1.097/Nitrogen-Doped Carbon Nanocomposites Using Metal–Organic Framework Nanosheets as Precursors for Supercapacitor Application

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• 作者：Feifei Cao ; Meiting Zhao ; Yifu Yu ; Bo Chen ; Ying Huang ; Jian Yang ; Xiehong Cao ; Qipeng Lu ; Xiao Zhang ; Zhicheng Zhang ; Chaoliang Tan ; Hua Zhang
• 刊名：Journal of the American Chemical Society
• 出版年：2016
• 出版时间：June 8, 2016
• 年：2016
• 卷：138
• 期：22
• 页码：6924-6927
• 全文大小：348K
• 年卷期：0
• ISSN：1520-5126

文摘

Two-dimensional (2D) metal–organic framework (MOF) nanosheets are attracting increasing research interest. Here, for the first time, we report the facile synthesis of 2D porphyrin paddlewheel framework-3 (PPF-3) MOF nanosheets with thickness of ca. 12–43 nm. Through the simultaneous sulfidation and carbonization of PPF-3 MOF nanosheets, we have prepared the 2D nanocomposite of CoS_1.097 nanoparticles (NPs) and nitrogen-doped carbon, referred to as CoSNC, in which the CoS_1.097 NPs with size of ca. 10 nm are embedded in the nitrogen-doped carbon matrix. As a proof-of-concept application, the obtained 2D CoSNC nanocomposite is used as an electrode material for a supercapacitor, which exhibits a specific capacitance of 360.1 F g^–1 at a current density of 1.5 A g^–1. Moreover, the composite electrode also shows high rate capability. Its specific capacitance delivered at a current density of 30.0 A g^–1 retains 56.8% of the value at 1.5 A g^–1.