Effects of coprecipitated zinc on the structure and electrochemical performance of Ni/al-layered double hydroxide

摘要

The effects of zinc on the structure and electrochemical performance of Ni/Al-layered double hydroxides (LDHs) prepared by a coprecipitation method were studied. The experimental results showed that the addition of zinc in Ni/Al-LDHs improved the electrochemical performance of the samples uch as discharge potential, cycle stability and reversibility. The maximum specific discharge capacity of 425 mAh g~-1 of nickel hydroxide was obtain for the Ni/Al-LDHs without zinc. The maximum discharge mediate potential of 413 mV and the lowest capacity deterioration rate of ＜5/100 after 398 charge-discharge cycles at 1C rate were gained for the 6.4 wt/100 zn-containing sample.