title: Facile template-free synthesis of vertically aligned polypyrrole nanosheets on nickel foams for flexible all-solid-state asymmetric supercapacitors.
abstract: This paper reports a novel and remarkably facile approach towards vertically aligned nanosheets on three-dimensional (3D) Ni foams. Conducting polypyrrole (PPy) sheets were grown on Ni foam through the volatilization of the environmentally friendly solvent from an ethanol-water solution of pyrrole (Py), followed by the polymerization of the coated Py in ammonium persulfate (APS) solution. The PPy-decorated Ni foams and commercial activated carbon (AC) modified Ni foams were employed as the two electrodes for the assembly of flexible all-solid-state asymmetric supercapacitors. The sheet-like structure of PPy and the macroporous feature of the Ni foam, which render large electrode-electrolyte interfaces, resulted in good capacitive performance of the supercapacitors. Moreover, a high energy density of ca. 14 Wh kg(-1) and a high power density of 6.2 kW kg(-1) were achieved for the all-solid-state asymmetric supercapacitors due to the wide cell voltage window.
authors.affiliation: School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan RD, Shanghai 200240, P. R. China. mai@sjtu.edu.cn.
authors.forename: Xiangwen
authors.initials: X
authors.lastname: Yang
authors.affiliation: School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan RD, Shanghai 200240, P. R. China. mai@sjtu.edu.cn.
authors.forename: Zhixing
authors.initials: Z
authors.lastname: Lin
authors.affiliation: School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan RD, Shanghai 200240, P. R. China.
authors.forename: Jingxu
authors.initials: J
authors.lastname: Zheng
authors.affiliation: School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan RD, Shanghai 200240, P. R. China. mai@sjtu.edu.cn.
authors.forename: Yingjuan
authors.initials: Y
authors.lastname: Huang
authors.affiliation: School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan RD, Shanghai 200240, P. R. China.
authors.forename: Bin
authors.initials: B
authors.lastname: Chen
authors.affiliation: School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan RD, Shanghai 200240, P. R. China. mai@sjtu.edu.cn.
authors.forename: Yiyong
authors.initials: Y
authors.lastname: Mai
authors.affiliation: School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan RD, Shanghai 200240, P. R. China. mai@sjtu.edu.cn and Department of Chemistry and Food Chemistry, Technische Universität Dresden, Mommsenstrasse 4, 01062 Dresden, Germany.
authors.forename: Xinliang
authors.initials: X
authors.lastname: Feng