title: Double polymer sheathed carbon nanotube supercapacitors show enhanced cycling stability.
abstract: Pseudo-materials are effective in boosting the specific capacitance of supercapacitors, but during service their degradation may also be very strong, causing reduced cycling stability. Here, we show that a carbon nanotube sponge grafted by two conventional pseudo-polymer layers in sequence can serve as a porous supercapacitor electrode with significantly enhanced cycling stability compared with single polymer grafting. Creating conformal polymer coatings on the nanotube surface and the resulting double-sheath configuration are important structural factors leading to the enhanced performance. Combining different polymers as double sheaths as reported here might be a potential route to circumvent the dilemma of pseudo-materials, and to simultaneously improve the capacitance and stability for various energy storage devices.
authors.affiliation: Centre for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, P. R. China. liyibin@hit.edu.cn.
authors.forename: Wenqi
authors.initials: W
authors.lastname: Zhao
authors.affiliation: School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai 264209, P. R. China.
authors.forename: Shanshan
authors.initials: S
authors.lastname: Wang
authors.affiliation: Centre for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, P. R. China. liyibin@hit.edu.cn.
authors.forename: Chunhui
authors.initials: C
authors.lastname: Wang
authors.affiliation: Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, P. R. China. anyuan@pku.edu.cn.
authors.forename: Shiting
authors.initials: S
authors.lastname: Wu
authors.affiliation: Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, P. R. China. anyuan@pku.edu.cn.
authors.forename: Wenjing
authors.initials: W
authors.lastname: Xu
authors.affiliation: Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, P. R. China. anyuan@pku.edu.cn.
authors.forename: Mingchu
authors.initials: M
authors.lastname: Zou
authors.affiliation: Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, P. R. China. anyuan@pku.edu.cn.
authors.forename: An
authors.initials: A
authors.lastname: Ouyang
authors.affiliation: Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, P. R. China. anyuan@pku.edu.cn.
authors.forename: Anyuan
authors.initials: A
authors.lastname: Cao
authors.affiliation: Centre for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, P. R. China. liyibin@hit.edu.cn.
authors.forename: Yibin
authors.initials: Y
authors.lastname: Li