title: Nanostructured Electrode Materials Derived from Metal-Organic Framework Xerogels for High-Energy-Density Asymmetric Supercapacitor.
abstract: This work successfully demonstrates metal-organic framework (MOF) derived strategy to prepare nanoporous carbon (NPC) with or without Fe3O4/Fe nanoparticles by the optimization of calcination temperature as highly active electrode materials for asymmetric supercapacitors (ASC). The nanostructured Fe3O4/Fe/C hybrid shows high specific capacitance of 600 F/g at a current density of 1 A/g and excellent capacitance retention up to 500 F/g at 8 A/g. Furthermore, hierarchically NPC with high surface area also obtained from MOF gels displays excellent electrochemical performance of 272 F/g at 2 mV/s. Considering practical applications, aqueous ASC (aASC) was also assembled, which shows high energy density of 17.496 Wh/kg at the power density of 388.8 W/kg. The high energy density and excellent capacity retention of the developed materials show great promise for the practical utilization of these energy storage devices.
authors.affiliation: Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Material Science and Engineering, College of Engineering, Peking University , Beijing 100871, China.
authors.forename: Asif
authors.initials: A
authors.lastname: Mahmood
authors.affiliation: Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Material Science and Engineering, College of Engineering, Peking University , Beijing 100871, China.
authors.forename: Ruqiang
authors.initials: R
authors.lastname: Zou
authors.affiliation: Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Material Science and Engineering, College of Engineering, Peking University , Beijing 100871, China.
authors.forename: Qingfei
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Material Science and Engineering, College of Engineering, Peking University , Beijing 100871, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Xia
authors.affiliation: Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Material Science and Engineering, College of Engineering, Peking University , Beijing 100871, China.
authors.forename: Hassina
authors.initials: H
authors.lastname: Tabassum
authors.affiliation: Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Material Science and Engineering, College of Engineering, Peking University , Beijing 100871, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Qiu
authors.affiliation: Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Material Science and Engineering, College of Engineering, Peking University , Beijing 100871, China.
authors.forename: Ruo
authors.initials: R
authors.lastname: Zhao
keywords: aqueous asymmetric supercapacitor; high energy density; iron oxide; metal−organic framework xerogel; nanoporous carbon