Metal–organic framework derived hierarchical Ni/Ni3S2 decorated carbon nanofibers for high-performance supercapacitors. (19th June 2019)

• Record Type: Journal Article
• Authors: Tian, Di; Chen, Sihui; Zhu, Wendong; Wang, Ce; Lu, Xiaofeng
• Is Part Of: Materials chemistry frontiers. Volume 3:Number 8(2019)
• Page Start: 1653
• Page End: 1660
• Publication Date: 2019-06-19
• Subjects: Materials science -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1039/c9qm00296k
• Languages: English
• ISSNs: 2052-1529

Abstract

Abstract : Metal–organic framework derived hierarchical Ni/Ni3 S2 decorated carbon nanofibers were designed for high-performance asymmetric supercapacitors. Abstract : Metal–organic frameworks (MOFs) and their derivatives have emerged as promising electrode materials in the energy conversion and storage field in the past few years. Herein, hierarchical Ni/Ni3 S2 decorated carbon nanofibers (CNFs) have been fabricated based on the template growth of MOFs on pre-oxidized electrospun polyacrylonitrile (PAN) nanofibers followed by carbonization and sulfurization processes. The formation of Ni and CNFs provides high conductivity, while the hierarchical structure contributes to a large number of exposed redox active sites. Thus the optimized hierarchical Ni/Ni3 S2 /CNFs achieve a high electrochemical performance as supercapacitor electrodes, exhibiting a specific capacitance of 830.0 F g −1 at 0.2 A g −1 and ideal rate capabilities. In addition, the assembled solid-state supercapacitor delivers a high energy density of 31.6 W h kg −1 at a power density of 1800 W kg −1 and a good capacitance retention of 95.7% after 5000 charge–discharge cycles. This strategy provides a basis for the efficient construction of MOF-derived electrode materials for their application in energy storage systems.