title: Hierarchical nitrogen-doped porous graphene/reduced fluorographene/sulfur hybrids for high-performance lithium-sulfur batteries.
abstract: It is a great challenge to obtain high performance cathodes with a high sulfur loading and good cycle performance due to the dissolution of intermediate lithium polysulfides in lithium-sulfur batteries. Herein, we report a novel hierarchical hybrid composed of nitrogen-doped porous graphene (NG), reduced fluorographene or graphene fluoride (RFG), and sulfur as a composite cathode in the Li-S batteries. In comparison with sulfur composites based on only either nitrogen-doped porous graphene or pure reduced fluorographene, the hierarchical hybrid of RFG, NG, and sulfur (NG-RFG/S) shows a better reversible capacity and rate capability performance due to a better confinement effect of lithium polysulfides and sulfur. The NG-RFG/S cathode with ∼63.2% S content exhibits a high discharge capacity of 1120 mA h g-1and retains 632 mA h g-1after 100 cycles at 0.1C. At the higher rate of 0.5C, the cell still maintains a discharge capacity of about 300 mA h g-1after 800 cycles, which reveals the great potential of this hybrid cathode for long-cycle-life, high energy density storage applications.
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China. hxchang@hust.edu.cn huangyh@hust.edu.cn yuanlixia@hust.edu.cn.
authors.forename: Zhixuan
authors.initials: Z
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China. hxchang@hust.edu.cn huangyh@hust.edu.cn yuanlixia@hust.edu.cn.
authors.forename: Jie
authors.initials: J
authors.lastname: Li
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China. hxchang@hust.edu.cn huangyh@hust.edu.cn yuanlixia@hust.edu.cn.
authors.forename: Jingwei
authors.initials: J
authors.lastname: Xiang
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China. hxchang@hust.edu.cn huangyh@hust.edu.cn yuanlixia@hust.edu.cn.
authors.forename: Shuai
authors.initials: S
authors.lastname: Cheng
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China. hxchang@hust.edu.cn huangyh@hust.edu.cn yuanlixia@hust.edu.cn.
authors.forename: Hao
authors.initials: H
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China. hxchang@hust.edu.cn huangyh@hust.edu.cn yuanlixia@hust.edu.cn.
authors.forename: Na
authors.initials: N
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China. hxchang@hust.edu.cn huangyh@hust.edu.cn yuanlixia@hust.edu.cn.
authors.forename: Lixia
authors.initials: L
authors.lastname: Yuan
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China. hxchang@hust.edu.cn huangyh@hust.edu.cn yuanlixia@hust.edu.cn.
authors.forename: Wenfeng
authors.identifier: http://orcid.org/0000-0001-9487-9375
authors.initials: W
authors.lastname: Zhang
authors.affiliation: School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
authors.forename: Jia
authors.initials: J
authors.lastname: Xie
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China. hxchang@hust.edu.cn huangyh@hust.edu.cn yuanlixia@hust.edu.cn.
authors.forename: Yunhui
authors.identifier: http://orcid.org/0000-0002-1302-7136
authors.initials: Y
authors.lastname: Huang
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China. hxchang@hust.edu.cn huangyh@hust.edu.cn yuanlixia@hust.edu.cn.
authors.forename: Haixin
authors.identifier: http://orcid.org/0000-0001-9621-4457
authors.initials: H
authors.lastname: Chang