title: Hydrothermal synthesis of nanostructured graphene/polyaniline composites as high-capacitance electrode materials for supercapacitors.
abstract: As known to all, hydrothermal synthesis is a powerful technique for preparing inorganic and organic materials or composites with different architectures. In this reports, by controlling hydrothermal conditions, nanostructured polyaniline (PANi) in different morphologies were composited with graphene sheets (GNS) and used as electrode materials of supercapacitors. Specifically, ultrathin PANi layers with total thickness of 10-20 nm are uniformly composited with GNS by a two-step hydrothermal-assistant chemical oxidation polymerization process; while PANi nanofibers with diameter of 50~100 nm are obtained by a one-step direct hydrothermal process. Benefitting from the ultrathin layer and porous structure, the sheet-like GNS/PANi composites can deliver specific capacitances of 532.3 to 304.9 F/g at scan rates of 2 to 50 mV/s. And also, this active material showed very good stability with capacitance retention as high as ~99.6% at scan rate of 50 mV/s, indicating a great potential for using in supercapacitors. Furthermore, the effects of hydrothermal temperatures on the electrochemical performances were systematically studied and discussed.
authors.affiliation: College of Materials Science and Engineering, Chongqing University, No. 174 Shazhengjie Road, Chongqing 400044, P.R. China.
authors.forename: Ronghua
authors.initials: R
authors.lastname: Wang
authors.affiliation: College of Aerospace Engineering, and The State Key Laboratory of Mechanical Transmissions, Chongqing University, No. 174 Shazhengjie Road, Chongqing 400044, P.R. China.
authors.forename: Meng
authors.initials: M
authors.lastname: Han
authors.affiliation: College of Aerospace Engineering, and The State Key Laboratory of Mechanical Transmissions, Chongqing University, No. 174 Shazhengjie Road, Chongqing 400044, P.R. China.
authors.forename: Qiannan
authors.initials: Q
authors.lastname: Zhao
authors.affiliation: College of Aerospace Engineering, and The State Key Laboratory of Mechanical Transmissions, Chongqing University, No. 174 Shazhengjie Road, Chongqing 400044, P.R. China.
authors.forename: Zonglin
authors.initials: Z
authors.lastname: Ren
authors.affiliation: College of Aerospace Engineering, and The State Key Laboratory of Mechanical Transmissions, Chongqing University, No. 174 Shazhengjie Road, Chongqing 400044, P.R. China.
authors.forename: Xiaolong
authors.initials: X
authors.lastname: Guo
authors.affiliation: College of Aerospace Engineering, and The State Key Laboratory of Mechanical Transmissions, Chongqing University, No. 174 Shazhengjie Road, Chongqing 400044, P.R. China.
authors.forename: Chaohe
authors.initials: C
authors.lastname: Xu
authors.affiliation: College of Aerospace Engineering, and The State Key Laboratory of Mechanical Transmissions, Chongqing University, No. 174 Shazhengjie Road, Chongqing 400044, P.R. China.
authors.forename: Ning
authors.initials: N
authors.lastname: Hu
authors.affiliation: Department of Mechanical Engineering, National University of Singapore, 2 Engineering Drive 3, Singapore 117581, Singapore.
authors.forename: Li
authors.initials: L
authors.lastname: Lu