title: Vapor-Phase Polymerized Poly(3,4-Ethylenedioxythiophene) on a Nickel Nanowire Array Film: Aqueous Symmetrical Pseudocapacitors with Superior Performance.
abstract: Three-dimensional (3D) nanometal scaffolds have gained considerable attention recently because of their promising application in high-performance supercapacitors compared with plain metal foils. Here, a highly oriented nickel (Ni) nanowire array (NNA) film was prepared via a simple magnetic-field-driven aqueous solution deposition process and then used as the electrode scaffold for the vapor-phase polymerization of 3,4-ethylenedioxythiophene (EDOT). Benefiting from the unique 3D open porous structure of the NNA that provided a highly conductive and oriented backbone for facile electron transfer and fast ion diffusion, the as-obtained poly(3,4-ethylenedioxythiophene) (PEDOT) exhibited an ultra-long cycle life (95.7% retention of specific capacitance after 20 000 charge/discharge cycles at 5 A/g) and superior capacitive performance. Furthermore, two electrodes were fabricated into an aqueous symmetric supercapacitor, which delivered a high energy density (30.38 Wh/kg at 529.49 W/kg) and superior long-term cycle ability (13.8% loss of capacity after 20 000 cycles). Based on these results, the vapor-phase polymerization of EDOT on metal nanowire array current collectors has great potential for use in supercapacitors with enhanced performance.
authors.affiliation: Division of Energy and Environment, Graduate School at Shenzhen, Tsinghua University, Xili University Town, Nanshan District, Shenzhen City, Guangdong Province, China.
authors.forename: Qisen
authors.initials: Q
authors.lastname: Xie
authors.affiliation: Division of Energy and Environment, Graduate School at Shenzhen, Tsinghua University, Xili University Town, Nanshan District, Shenzhen City, Guangdong Province, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Xu
authors.affiliation: Division of Energy and Environment, Graduate School at Shenzhen, Tsinghua University, Xili University Town, Nanshan District, Shenzhen City, Guangdong Province, China.
authors.forename: Zhipeng
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Division of Energy and Environment, Graduate School at Shenzhen, Tsinghua University, Xili University Town, Nanshan District, Shenzhen City, Guangdong Province, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Xu
authors.affiliation: Division of Energy and Environment, Graduate School at Shenzhen, Tsinghua University, Xili University Town, Nanshan District, Shenzhen City, Guangdong Province, China.
authors.forename: Peichao
authors.initials: P
authors.lastname: Zou
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, United States of America.
authors.forename: Ziyin
authors.initials: Z
authors.lastname: Lin
authors.affiliation: School of Chemical & Biomedical Engineering, Nanyang Technological University, Singapore, Singapore.
authors.forename: Chenjie
authors.initials: C
authors.lastname: Xu
authors.affiliation: Division of Energy and Environment, Graduate School at Shenzhen, Tsinghua University, Xili University Town, Nanshan District, Shenzhen City, Guangdong Province, China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Yang
authors.affiliation: Division of Energy and Environment, Graduate School at Shenzhen, Tsinghua University, Xili University Town, Nanshan District, Shenzhen City, Guangdong Province, China.
authors.forename: Feiyu
authors.initials: F
authors.lastname: Kang
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, United States of America.
authors.forename: Ching-Ping
authors.initials: CP
authors.lastname: Wong
mesh_terms: D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000737:chemistry*; D025802:Electric Capacitance; D004563:Electrochemistry; D004566:Electrodes; D053770:Nanowires / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D058105:Polymerization; D011108:Polymers / Q000737:chemistry*
chemical_list: D019086:Bridged Bicyclo Compounds, Heterocyclic; D011108:Polymers; C121383:poly(3,4-ethylene dioxythiophene); D009532:Nickel