均匀沉淀法合成氢氧化镍超微粉

Preparation of ultrafine powder of nickel hydroxide with homogeneous sedimentation method

为了制备具有高电化学活性和高堆积密度的Ni(OH)2正极材料,以尿素和硝酸镍为原料,采用均匀沉淀法制备了纳米级Ni(OH)2。通过设计正交试验,找出了最佳工艺条件。以红外光谱、XRD和SEM等测试手段,对纳米级Ni(OH)2的粉体结构及形貌进行了研究。结果表明,在95℃以上温度下,n尿素:nNi2+=3∶1时,可得到粒度较细,平均粒径在0 4～0 5μm左右的Ni(OH)2粉体,且收率较高。

To prepare Ni(OH)2 of high electrochemical activity and bulk density,with urea and nickel nitrate as the raw materials,the ultrafine particles of nickel hydroxide is prepared with homogeneous sendimentation method.The optimum processing conditions are found through desinged orthogonal experiments.Microstructure and morphology of nickel hydroxide are investigated by means of IR,XRD and SEM.The results indicate that highyield and fine granular nickel hydroxide can be achieved when the temperature is above 95 ℃ and the mol rate of urea and nickel nitrate is 3∶1.Nickel hydroxide power in the diameter of 04～05 μm is available by controlling reaction conditions.