title: Au-embedded ZnO/NiO hybrid with excellent electrochemical performance as advanced electrode materials for supercapacitor.
abstract: Here we design a nanostructure by embedding Au nanoparticles into ZnO/NiO core-shell composites as supercapacitors electrodes materials. This optimized hybrid electrodes exhibited an excellent electrochemical performance including a long-term cycling stability and a maximum specific areal capacitance of 4.1 F/cm(2) at a current density of 5 mA/cm(2), which is much higher than that of ZnO/NiO hierarchical materials (0.5 F/cm(2)). Such an enhanced property is attributed to the increased electro-electrolyte interfaces, short electron diffusion pathways and good electrical conductivity. Apart from this, electrons can be temporarily trapped and accumulated at the Fermi level (EF') because of the localized schottky barrier at Au/NiO interface in charge process until fill the gap between ZnO and NiO, so that additional electrons can be released during discharge. These results demonstrate that suitable interface engineering may open up new opportunities in the development of high-performance supercapacitors.
authors.affiliation: State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, People's Republic of China.
authors.forename: Xin
authors.initials: X
authors.lastname: Zheng
authors.forename: Xiaoqin
authors.initials: X
authors.lastname: Yan
authors.forename: Yihui
authors.initials: Y
authors.lastname: Sun
authors.forename: Zhiming
authors.initials: Z
authors.lastname: Bai
authors.forename: Guangjie
authors.initials: G
authors.lastname: Zhang
authors.forename: Yanwei
authors.initials: Y
authors.lastname: Shen
authors.forename: Qijie
authors.initials: Q
authors.lastname: Liang
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhang
keywords: Au nanoparticles; electrons tapping effect; interface engineering; multishell; supercapacitor