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

• Main Authors: Cao, Feifei, Zhao, Meiting, Yu, Yifu, Chen, Bo, Huang, Ying, Yang, Jian, Cao, Xiehong, Lu, Qipeng, Zhang, Xiao, Zhang, Zhicheng, Tan, Chaoliang, Zhang, Hua
• Other Authors: School of Materials Science & Engineering
• Format: Article
• Language: English
• Published: 2017
• Subjects: Metal-organic framework; Supercapacitors
• Online Access: https://hdl.handle.net/10356/83281; http://hdl.handle.net/10220/43544
• Institution: Nanyang Technological University

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 CoS1.097 nanoparticles (NPs) and nitrogen-doped carbon, referred to as CoSNC, in which the CoS1.097 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.