反复浸渍法制备氢氧化镍及电化学性能研究

Repeated immersion method for nickel hydroxide and electrochemical performance

以氢氧化钠为沉淀剂,以氯化镍为前驱体采用反复浸渍法合成了氢氧化镍。X射线衍射(XRD)证明制备的材料为纯相α-Ni(OH)2,扫描电子显微镜(SEM)显示了Ni(OH)2呈现出鱼鳞状的絮状。电化学性能测试表明在电流为10 mA时,起始比电容为1 000 F/g,随着循环次数的增加,比电容减小;200多次后稳定于950 F/g(为初始容量的95%)。

With NaOH as precipitation agent and NiCI2 as raw material, Ni（OH）2 particles were synthetized by repeated immersion method. X-ray diffraction（XRD） shows that the material is α-Ni（OH）2; scanning electron microscope（SEM） shows the Ni （OH）2 particles are presented like a wave-like shape. The test of electrochemical performance shows that the high capacitance is 1 000 F/g at the current of 10 mA. With the increase of cycling times, the specific capacitance was decreased; after 200 times it can be retained at 950 F/g （95% of the initial capacitance）.