Nickel-cobalt oxides/carbon nanoflakes as anode materials for lithium-ion batteries

Authors

Zaiping Guo, University of WollongongFollow
Hua-Kun Liu, University of WollongongFollow
Jun Yang, Shanghai Jiap Tong University, CHINA
Yanna Nuli, University of WollongongFollow
Peng Zhang, University of Wollongong
Jiulin Wang, Shanghai Jiao Tong University China

RIS ID

31416

Publication Details

Nuli, Y., Zhang, P., Guo, Z., Liu, H. K., Yang, J. & Wang, J. (2009). Nickel-cobalt oxides/carbon nanoflakes as anode materials for lithium-ion batteries. Materials Research Bulletin, 44 (1), 140-145.

Abstract

Novel nickel–cobalt oxides/carbon nanoflakes with Ni/Co molar ratio = 1:1 and 1:2 have been synthesized by a convenient hydrothermal method followed by a simple calcination process. X-ray diffraction results showed that the composites were composed of NiO, Co₃O₄, and carbon. Scanning electron microscope measurements demonstrated that the composites were flakes less than 100 nm in thickness, and the corresponding energy dispersive spectroscopy mapping showed that the carbon was distributed homogeneously in the composites. The electrochemical results showed that the composite electrodes exhibited low initial coulombic efficiency and excellent charge–discharge cycling stability. Additionally, the effect of different Ni/Co molar ratios on the electrochemical properties of the composites was investigated, and better performance was obtained for the sample with a Ni/Co molar ratio of 1:2.