Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (12): 3175-3180.doi: 10.3866/PKU.WHXB20101141

• ELECTROCHEMISTRY • Previous Articles     Next Articles

5-Sulfosalicylic Acid-Assisted Hydrothermal Synthesis and Supercapacitive Properties of Co-Ni Layered Double Hydroxides

ZHANG Fang1, YUAN Chang-Zhou2, ZHANG Xiao-Gang1, ZHANG Luo-Jiang1, XU Ke1   

  1. 1. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China;
    2. School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, Anhui Province, P. R. China
  • Received:2010-07-06 Revised:2010-08-15 Published:2010-12-01
  • Contact: ZHANG Xiao-Gang E-mail:azhangxg@163.com
  • Supported by:

    The project was supported by the National Key Basic Research Program of China (2007CB209703) and National Natural Science Foundation of China (20633040, 20873064).

Abstract:

Co-Ni layered double hydroxides (CoxNi1-x LDHs) were successfully synthesized by a 5- sulfosalicylic acid (SSA)-assisted hydrothermal process. Structural and morphological characterizations were performed using powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, field emission scanning electron microscopy (FE-SEM), and transmission electron microscopy (TEM). The results reveal that different morphologies of CoxNi1-x LDHs could be obtained by tuning the Co/Ni molar ratio. The CoxNi1-x LDHs exhibit petal-like nanospheres that are composed of nanoflakes at a Co molar fraction of 0.24. The LDH of this structure has a specific capacitance of 1735 F·g-1 at a current density of 1 A·g-1 as determined by cyclic voltammetry and galvanostatic charge-discharge.

Key words: Supercapacitor, Layered double hydroxide, 5-Sulfosalicylic acid, Hydrothermal method

MSC2000: 

  • O646