title: Nickel Disulfide-Graphene Nanosheets Composites with Improved Electrochemical Performance for Sodium Ion Battery.
abstract: Nickel disulfide-graphene nanosheets (NiS2-GNS) composites were successfully synthesized via a simple and mild hydrothermal method. It was revealed by scanning electron microscopy and transmission electron microscopy images that the spherical NiS2 nanoparticles with a diameter of 200-300 nm were uniformly dispersed on graphene nanosheets. Na(+) electrochemical storage properties including cycling performance and high-rate capability of NiS2-GNS composites were investigated, demonstrating a superior reversible capacity of 407 mAh g(-1) with the capacity retention of 77% over 200 cycles at a current density of 0.1 C. Furthermore, even at a large current density of 2 C, a high capacity of 168 mAh g(-1) can still remain, which is much higher than that of pristine NiS2 materials. The enhancement in electrochemical properties might be attributed to the synergetic effect endowed by high conductivity of graphene and novel structure of the electrode material. Combined with the advantages of low cost and environmental benignity, NiS2-GNS composite would be a potential anode material for sodium ion batteries.
authors.affiliation: Institute of Materials Science and Engineering, Ocean University of China , Qingdao 266100, Shandong Province, P. R. China.|Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao 266101, P. R. China.
authors.forename: Tianshi
authors.initials: T
authors.lastname: Wang
authors.affiliation: Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao 266101, P. R. China.
authors.forename: Pu
authors.initials: P
authors.lastname: Hu
authors.affiliation: Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao 266101, P. R. China.
authors.forename: Chuanjian
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao 266101, P. R. China.
authors.forename: Huiping
authors.initials: H
authors.lastname: Du
authors.affiliation: Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao 266101, P. R. China.
authors.forename: Zhonghua
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao 266101, P. R. China.
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Wang
authors.affiliation: Institute of Materials Science and Engineering, Ocean University of China , Qingdao 266100, Shandong Province, P. R. China.
authors.forename: Shougang
authors.initials: S
authors.lastname: Chen
authors.affiliation: Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials (Ministry of Education), Shandong University , Jinan 250061, P. R. China.
authors.forename: Junwei
authors.initials: J
authors.lastname: Xiong
authors.affiliation: Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao 266101, P. R. China.
authors.forename: Guanglei
authors.initials: G
authors.lastname: Cui
keywords: anode materials; graphene nanosheets; nickel disulfide; sodium ion battery; transition metal disulfides