科研之友
微信
新浪微博
Facebook
分享链接
摘要
NiA1, CoAl and NiCoAl hydroxides were fabricated via urea decomposition method. The structure and morphology of samples were characterized by X -Ray diffraction, FTIR, scanning electron microscope, X-ray photoelectron spectroscope, and nitrogen adsorption desorption. The results indicate that three samples exhibit hydrotalcite structure and different morphology. Specific surface area of NiCoAl is the smallest among the three samples. Ni and Co elements coexist in the form of bivalent in NiCoAl-LDH. Cyclic voltammetry (CV), galvanostatic charge -discharge (GCD) and AC impedance tests demonstrate that, at the current density of 0.6 A/g, specific capacitance of NiA1, CoAl and NiCoA1 electrodes is 468, 507 and 929 F/g, respectively. The capacitance retention of their electrodes is 30%, 36% and 40%, respectively, after 3000 cycles at the current density of 6 A/g. Based on these properties, NiCoAl is superior in electrochemical performance to the others.
- 出版日期2016-11
- 单位兰州理工大学
