当前位置: X-MOL 学术ChemElectroChem › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Synthesis of the Urchin‐Like NiS@NiCo2S4 Composites on Nickel Foam for High‐Performance Supercapacitors
ChemElectroChem ( IF 3.5 ) Pub Date : 2019-10-04 , DOI: 10.1002/celc.201901304
Ping Yang 1 , Lina Feng 1 , Jun Hu 1 , Wenqin Ling 1 , Shaohua Wang 1 , Jianjun Shi 1 , Zhangfu Yang 2 , Fengwu Wang 3
Affiliation  

A simple hydrothermal treatment process was used to prepare urchin‐like NiS@NiCo2S4 composites on Ni foam, which were then employed as binder‐free and conductive‐agent‐free electrodes for pseudocapacitors. The as‐synthesized composites have significant capacitive performance because of the novel porous structure. A specific capacitance up to 14.32 F cm−2 was obtained at a current density of 5 mA cm−2, which was far higher than that of pristine NiCo2S4 nanotube arrays (about 8.4 F cm−2). More importantly, Ni@NiS@NiCo2S4 and activated carbon (AC) were assembled as the positive and negative electrode, respectively, in an asymmetric supercapacitor, which possesses prominent performance. In addition to 78.7 % capacitance retention when cycling at 50 mA cm−2 for 5000 cycles, the as‐fabricated Ni@NiS@NiCo2S4//AC device exhibits a high energy density of 38.96 Wh kg−1 and power density of 339.62 W kg−1 at a current density of 10 mA cm−2.

中文翻译:

用于高性能超级电容器的镍泡沫上的Urchin类NiS @ NiCo2S4复合材料的合成

使用一种简单的水热处理工艺,在泡沫镍上制备了类似顽童的NiS @ NiCo 2 S 4复合材料,然后将其用作伪电容器的无粘合剂和无导电剂的电极。由于具有新颖的多孔结构,因此合成后的复合材料具有显着的电容性能。在5mA cm -2的电流密度下获得了高达14.32 F cm -2的比电容,该电容远高于原始NiCo 2 S 4纳米管阵列的电容量(约8.4 F cm -2)。更重要的是,Ni @ NiS @ NiCo 2 S 4活性炭(AC)和活性炭(AC)分别装配在非对称超级电容器中,具有出色的性能。Ni @ NiS @ NiCo 2 S 4 // AC器件在50 mA cm -2的电流下循环5000次时,除了保留78.7%的电容外,还具有38.96 Wh kg -1的高能量密度和电流密度为10 mA cm -2时为339.62 W kg -1
更新日期:2019-10-10
down
wechat
bug