NiO nanoparticles decorated hexagonal Nickel-based metal-organic framework: Self-template synthesis and its application in electrochemical energy storage.
Nan Li, Yan Li, Qing Li, Yan Zhao, Chun-Sen Liu, Huan Pang
Author Information
Nan Li: School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225009, Jiangsu, PR China.
Yan Li: School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225009, Jiangsu, PR China.
Qing Li: School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225009, Jiangsu, PR China.
Yan Zhao: College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, PR China.
Chun-Sen Liu: Henan Provincial Key Laboratory of Surface & Interface Science, Zhengzhou University of Light Industry, Zhengzhou 450002, PR China. Electronic address: chunsenliu@zzuli.edu.cn.
Huan Pang: School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225009, Jiangsu, PR China. Electronic address: panghuan@yzu.edu.cn.
A one-pot solvothermal strategy and subsequent calcination were proposed for fabricating a composite of NiO nanoparticles on hexagonal Ni-based metal-organic framework (Ni-MOF) (Ni-MOF@NiO). The prepared NiO nanoparticles on the hexagonal Ni-MOF not only improves the electrical conductivity and increases redox active sites, but also prevents the agglomeration of NiO nanoparticles. In particular, highly dispersed and small-sized NiO nanoparticles on the hexagonal Ni-MOF facilitates the migration of electrolyte ions, and the pseudocapacitive performance is evaluated through electrochemical measurements. At 0.5 A g, the Ni-MOF@NiO composite shows a specific capacitance of up to 1192.7 F g and a high capacity retention (93.23% over 5000 cycles) in 3 M KOH. Moreover, the Ni-MOF@NiO nanoparticles and activated carbon are assembled into aqueous devices with a maximum energy density of 62.2 Wh kg. These results indicate the potential of Ni-MOF@NiO composite as an electrode material for application in supercapacitors. Additionally, the method of synthesizing Ni-MOF@NiO in this study can be used to synthesize other MOF@metal oxide materials for electrochemical energy storage and other related applications.
