Vapor-Phase Polymerized Poly3,4-Ethylenedioxythiophene on a Nickel Nanowire Array Film: Aqueous Symmetrical Pseudocapacitors with Superior PerformanceReportar como inadecuado




Vapor-Phase Polymerized Poly3,4-Ethylenedioxythiophene on a Nickel Nanowire Array Film: Aqueous Symmetrical Pseudocapacitors with Superior Performance - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

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 poly3,4-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.



Autor: Qisen Xie , Yang Xu , Zhipeng Wang , Chao Xu, Peichao Zou, Ziyin Lin, Chenjie Xu, Cheng Yang , Feiyu Kang, Ching-Ping Wong

Fuente: http://plos.srce.hr/



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