title: Uniform Incorporation of Flocculent Molybdenum Disulfide Nanostructure into Three-Dimensional Porous Graphene as an Anode for High-Performance Lithium Ion Batteries and Hybrid Supercapacitors.
abstract: Hybrid supercapacitors (HSCs) with lithium-ion battery-type anodes and electric double layer capacitor-type cathodes are attracting extensive attention and under wide investigation because of their combined merits of both high power and energy density. However, the performance of most HSCs is limited by low kinetics of the battery-type anode which cannot match the fast kinetics of the capacitor-type cathode. In this study, we have synthesized a three-dimensional (3D) porous composite with uniformly incorporated MoS2 flocculent nanostructure onto 3D graphene via a facile solution-processed method as an anode for high-performance HSCs. This composite shows significantly enhanced electrochemical performance due to the synergistic effects of the conductive graphene sheets and the interconnected porous structure, which exhibits a high rate capability of 688 mAh/g even at a high current density of 8 A/g and a stable cycling performance (997 mAh/g after 700 cycles at 2 A/g). Furthermore, by using this composite as the anode for HSCs, the HSC shows a high energy density of 156 Wh/kg at 197 W/kg, which also remains at 97 Wh/kg even at a high power density of 8314 W/kg with a stable cycling life, among the best results of the reported HSCs thus far.
authors.affiliation: Functional Thin Films Research Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen, 518055, China.
authors.forename: Fan
authors.initials: F
authors.lastname: Zhang
authors.affiliation: Functional Thin Films Research Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen, 518055, China.
authors.forename: Yongbing
authors.initials: Y
authors.lastname: Tang
authors.affiliation: Functional Thin Films Research Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen, 518055, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Liu
authors.affiliation: Functional Thin Films Research Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen, 518055, China.
authors.forename: Hongyi
authors.initials: H
authors.lastname: Ji
authors.affiliation: Functional Thin Films Research Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen, 518055, China.
authors.forename: Chunlei
authors.initials: C
authors.lastname: Jiang
authors.affiliation: Functional Thin Films Research Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen, 518055, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Functional Thin Films Research Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen, 518055, China.
authors.forename: Xiaolong
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Physics and Materials Science, Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong , Hong Kong SAR, China.
authors.forename: Chun-Sing
authors.initials: CS
authors.lastname: Lee
keywords: 3D porous composite; anode; graphene; hybrid supercapacitor; molybdenum disulfide