复合数
超级电容器
材料科学
多孔性
电解质
化学工程
透射电子显微镜
扫描电子显微镜
电化学
纳米颗粒
电极
纳米技术
比表面积
复合材料
化学
有机化学
工程类
物理化学
催化作用
作者
Ashok Kumar Das,Nam Hoon Kim,Seung Hee Lee,Youngku Sohn
标识
DOI:10.1016/j.compositesb.2018.05.028
摘要
The synthesis of metal oxide composites with porous structures for supercapacitor application has drawn much attention owing to their high surface area and easy access of the electrolyte ions to the electrode surface through the pores of the active materials. A facile hydrothermal approach is suggested for the synthesis of porous CuCo2O4 composite sheets and their application as an active electrode material for supercapacitor application. Field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) measurements show the formation of porous CuCo2O4 composite sheets. BET surface area measurements show that the porous CuCo2O4 composite sheet has 69.44 m2 g−1 surface area, which is 4.7 times higher than quasi-spherical CuCo2O4 nanoparticles. The porous CuCo2O4 composite sheet delivered 1037 C g−1 specific capacity at 5 mV s−1. Additionally, the porous CuCo2O4 composite sheet retained 94% of its initial specific capacity after 5000 charge-discharge cycles at 10 A g−1 indicating an excellent cyclic stability. This excellent supercapacitive performance is attributed to the high surface area and enhanced ion transport through the pores of the CuCo2O4 sheets. This high specific capacity and excellent cyclic stability of the porous CuCo2O4 composite sheets prove to be a promising candidate for supercapacitor application.
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