The Study On The Preparation,Structure Characterization And Electrochemical Property Multi-element Doped Nano-scale Ni(OH)₂

With the rapid development of Nano-scale material technology, the research of Nano -scale material has been expanded to the field of power source. Nano-scale Ni(OH)2 has been the hotpoint about its researching and developing all over the world, as a kind of effective battery material.In this paper, the optimum technics parameters to synthesize nanoβ-Ni(OH)2, which was doped with Co and Zn by microemulsion method, were decided through optimizing technics. The tap density and bulk density of the sample was 2.02 and 1.62g/cm3, the lattice parameters a=0.3093nm,c=0.4615nm, when pH was 11.0, temperature was 50℃, the content of Co and Zn was 4% and 6%, the results were as follows: the average particle size is 80nm.The particular peaks ofβ-Ni(OH)2 appeared at 322,451,3573 cm-1, and the additional peaks about crystal lattice also appeared at 3676,3610,519cm-1 in the Raman spectrum. Furthermore, the results of cyclic voltammetry showed that the CV characteristic of the sample doped with Co and Zn was better than the other which was no-doped or doped with Co simply, which included ?Ep was 83mV, and the difference potential was about 65 mV between oxidation peaks and deoxidation peaks .Just as the above measure, the optimum technics parameters to synthesizeα-Ni(OH)2 adulterated Al and Zn colloid by microemulsion method were also decided. When testing the sample which was prepared under the condition that pH was 11, temperature was 30℃and the content of Al and Zn was 9% and 5%, the results were as follows: the average particle size is 60nm;the lattice parameters a=0.2917nm,c=0.7881nm.The XRD peaks didn't disappear after immersed for a month, its charging and discharging performance hadn't any change nearly, what above indicated that the sample had well stability. IR peaks appeared at 3426.1 cm-1 and 1635.7 cm-1 and a widen weightlessness peak also appeared at its differential coefficient curve, what said there was crystal water among lattices.The results of all kinds of analysis revealed that nano Ni(OH)2 power enhanced the chance of contacting with electrolyte, and lessened the diffuse interval of proton in the solid phase to increase the diffused performance. The charge-discharge current efficiency of Ni electrode was enhanced by reducing the actual current density of active material effectively and...