反复浸渍法制备NiO及电化学性能研究

Repeated immersion method for nickel oxide and electrochemical performance

以NaOH为沉淀剂,NiCl2为前驱体采用反复浸渍法合成了Ni(OH)2,在300℃煅烧制备了NiO。X射线衍射(XRD)证明材料为立方晶相的NiO,扫描电子显微镜(SEM)显示了NiO呈现出波浪状的形貌。电化学性能测试:以10mA进行恒流充放电测试,起始容量为455F/g;随着循环次数的增加,比容量减小,200次后稳定于415F/g(为初始容量的91.2%)。

With NaOH as precipitation agent and NiCl2 as raw material, Ni（OH）2 particles were synthetized by repeated immersion method and sintered at 300℃ for NiO. X-ray diffraction （XRD） shows that the material is cubic crystalling phase of NiO;scanning electron microscope （SEM） shows the NiO particles present a wave-like shape. When evaluated for electrochemical performance, the NiO particles demonstrate improved electrochemical properties with a high capacitance of 455F/g at the current of 10mA. With the increase of cycling times, the specific capacitance decreased; after 200 times it can be retained at 415F/g （91.2% of the initial capacitance）.