Ni-Zn binary system hydroxide, oxide and sulfide materials: synthesis and high supercapacitor performance

作者：Wang, Xiaobing; Hu, Jiangjiang; Liu, Weidong; Wang, Guoyong; An, Jian; Lian, Jianshe^*

来源：Journal of Materials Chemistry A, 2015, 3(46): 23333-23344.

DOI：10.1039/c5ta07169k

• NANOSHEET ARRAYS
• ELECTROCHEMICAL PERFORMANCE
• SOLVOTHERMAL SYNTHESIS
• ULTRAHIGH CAPACITANCE
• ELECTRODE MATERIAL
• NICKEL FOAM
• GRAPHENE
• NANOCOMPOSITES
• NANOPARTICLES
• NANOWIRES

To avoid aggregation in the production of the active electrode material, Ni-Zn system materials (NixZn1-xOH, NiO-ZnO and NixZn1-xS) were synthesized by using a belt reaction zone model, and then were characterized systematically in this work. Among these materials, NixZn1-xS porous spheroid nanoparticles with diameters similar to 30 nm possess abundant interconnected micropores caused by the Kirkendall effect in the synthesis, leading to a high surface area of 148.4 m(2) g(-1) and special paths for ion diffusion. In the three-electrode system testing, NixZn1-xS porous spheroid nanoparticles show the highest specific capacitance of 1867 F g(-1) at a current density of 1 A g(-1), as well as excellent rate capability and cycling stability. Using NixZn1-xS as the positive electrode and active carbon as the negative electrode, the asymmetric supercapacitor device exhibits an excellent electrochemical performance. The results provide us with a modified method to synthesize metal hydroxides, oxides and sulfides, in order to obtain materials with high supercapacitor performance.

• 出版日期2015
• 单位吉林大学