Metallic Layered Polyester Fabric Enabled Nickel Selenide Nanostructures as Highly Conductive and Binderless Electrode with Superior Energy Storage Performance
Metallic Layered Polyester Fabric Enabled Nickel Selenide Nanostructures as Highly Conductive and Binderless Electrode with Superior Energy Storage Performance
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DOI：
10.1002/aenm.201601362
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发表时间：
2017-02-22
影响因子：
27.8
通讯作者：
Yu, Jae Su
中科院分区：
文献类型：
--
作者：
Nagaraju, Goli;Cha, Sung Min;Yu, Jae Su
采用单步计时电流法-电压辅助电化学沉积（ECD）法合成了具有高度柔性和导电性的织物（CF）支撑的菜花状硒化镍纳米结构（Ni 3Se 2 NS），并将其用作超级电容器（SC）的正极。在聚酯纤维表面上由多层金属膜组成的CF基底能够提供高电导率作为ECD过程中的工作电极。由于CF具有良好的导电性、高孔隙率和相互缠绕的纤维骨架，通过施加-1.0 V的计时电流法电压240 s，菜花状Ni 3Se 2 NS以可靠的粘附力致密地结合在CF（Ni 3Se 2 NS @CF）的整个表面上。在1 M KOH电解质水溶液中，当放电电流密度为2 A g（-1）时，合成的菜花状Ni 3Se 2 NSs@CF电极的最大比容量（CSC）为119.6 mA h g（-1）.在KOH水溶液中加入少量的氧化还原添加剂，可显著提高电极的比容量，在2A g（-1）时，比容量可达251.82mA h g（-1），且具有良好的容量保持率。此外，组装的基于纺织品的非对称SC实现了显著的电化学性能，例如更高的能量和功率密度，其能够点亮不同颜色的发光二极管。
Highly flexible and conductive fabric (CF)-supported cauliflower-like nickel selenide nanostructures (Ni3Se2 NSs) are facilely synthesized by a singlestep chronoamperometry voltage-assisted electrochemical deposition (ECD) method and used as a positive electrode in supercapacitors (SCs). The CF substrate composed of multi-layered metallic films on the surface of polyester fibers enables to provide high electrical conductivity as a working electrode in ECD process. Owing to good electrical conductivity, high porosity and intertwined fibrous framework of CF, cauliflower-like Ni3Se2 NSs are densely integrated onto the entire surface of CF (Ni3Se2 NSs@CF) substrate with reliable adhesion by applying a chronoamperometry voltage of -1.0 V for 240 s. The electrochemical performance of the synthesized cauliflower-like Ni3Se2 NSs@CF electrode exhibits a maximum specific capacity (CSC) of 119.6 mA h g(-1) at a discharge current density of 2 A g(-1) in aqueous 1 m KOH electrolyte solution. Remarkably, the specific capacity of the same electrode is greatly enhanced by introducing a small quantity of redox-additive electrolyte into the aqueous KOH solution, indicating the CSC approximate to 251.82 mA h g(-1) at 2 A g(-1) with good capacity retention. Furthermore, the assembled textile-based asymmetric SCs achieve remarkable electrochemical performance such as higher energy and power densities, which are able to light up different colored lightemitting diodes.