超级电容器
纳米棒
电容
电极
氢氧化物
材料科学
功率密度
纳米技术
电流密度
化学工程
光电子学
电化学
化学
工程类
物理化学
功率(物理)
量子力学
物理
作者
Ying Liu,Xueying Cao,Yuxue Zhong,Liang Cui,Di Wei,Rongkun Zheng,Jingquan Liu
标识
DOI:10.1016/j.jallcom.2020.155321
摘要
Here we report the construction of a kind of electrode material with excellent capacitive performance composed of Ni, Co and Al layered double hydroxide (NiCoAl-LDH) nanosheets branched on Cu2+1O nanorod arrays (Cu2+1[email protected]) on copper foam current collector, which is obtained via an easy in situ chemical oxidation reaction in combination with hydrothermal method. The as-prepared Cu2+1[email protected] electrode presents observably enhanced electrochemical performance with an outstanding specific capacitance (2932 F g−1 at 0.75 A g−1), and extraordinary cycling stability (94.27% of the initial capacitance maintained after GCD test for 6000 cycles), which are much superior to those of Cu(OH)2 and Cu2+1[email protected] electrodes. Additionally, the Cu2+1[email protected] nanorod arrays, as a positive electrode material, can also be utilized to assemble a hybrid supercapacitor (HSC) device with an activated carbon (AC) electrode (negative electrode). The energy density of the assembled HSC device can up to 61.83 Wh kg−1 with a working voltage of 1.5 V, meanwhile the power density is 749.93 W kg−1. Furthermore, a few Light Emitting Diode (LED) indicators with different shape combination can be lit up by the assembled HSC devices, demonstrating the practicability of the HSC device.
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