Novel 3D flower-like CoNi2S4/carbon nanotube composites as high-performance electrode materials for supercapacitors

作者：Ai, Zhihong; Hu, Zhonghua^*; Liu, Yafei; Fan, Mengxuan; Liu, Peipei

来源：New Journal of Chemistry, 2016, 40(1): 340-347.

DOI：10.1039/c5nj02279g

• IN-SITU GROWTH
• CARBON NANOTUBES
• FACILE SYNTHESIS
• PSEUDOCAPACITIVE PROPERTIES
• NICKEL COBALTITE
• HOLLOW SPHERES
• NICO2S4
• GRAPHENE
• NANOPARTICLES
• ARRAYS

Novel 3D flower-like CoNi2S4/carbon nanotube composites with a porous structure were designed through a facile precursor transformation approach as electrode materials for supercapacitors. The resulting samples are characterized by X-ray diffraction, Raman spectra, energy dispersive spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption-desorption. Their electrochemical performance was investigated by means of cyclic voltammetry, galvanostatic charge-discharge, impedance spectra and cycle life. By selecting carbon nanotubes as the conductive support for the growth of CoNi2S4, the as-obtained CoNi2S4/carbon nanotube composites displayed an ultrahigh specific capacitance of 2094 F g(-1) at 1 A g(-1) and a good rate capability (72% capacity retention at 10 A g(-1)). These results above suggest the great potential of the unique flower-like CoNi2S4/carbon nanotube composites in the development of high-performance electrode materials for supercapacitors.

• 出版日期2016
• 单位同济大学