循环伏安性能的影响
(哈尔滨工业大学 应用化学系， 哈尔滨 150001)
摘 要: 采用沉淀转化法制备出纳米级Ni(OH)2 ， 研究了干燥温度对材料团聚程度和电化学循环伏安性能的影响。 XRD 和TEM 测试结果表明： 所制备的材料为纳米级β-Ni(OH)2 ， 晶粒尺寸在10～100nm之间。 干燥温度对纳米级Ni(OH)2的团聚程度有较大影响， 并可以在一定程度上控制材料的密度。 循环伏安测试表明： 适当团聚的纳米级Ni(OH)2 比微米级的具有更优越的电化学循环伏安性能， 其质子扩散系数也较大。
关键字: 纳米材料；团聚； Ni(OH)2； 粉末微电极； 干燥温度
（Department of Applied Chemistry，Harbin Institute of Technology,
Harbin 150001, China）
Abstract:Nano-scale Ni(OH)2 was prepared by precipitate transformation method. The effects of drying temperature on the agglomeration and electrochemical cyclic voltammetry of nano-scale Ni(OH)2 were investigated. The measurement results of XRD and TEM indicate that the nano-scale Ni(OH)2 prepared is β-phase and the grain size is in the rang of 10～100nm. Drying temperature has a great influence on the agglomeration degree of nano-scale Ni(OH)2 and thus can also control the density of nano-scale Ni(OH)2 within a certain extent. Cyclic voltammetry(CV) experiments show that the nano-scale Ni(OH)2 with suitable agglomeration degree has better electrochemical CV parameters and proton diffusion coefficient than micron-scale Ni(OH)2.
Key words: nano-material; agglomeration; Ni(OH)2; powder microelectrode; drying temperature
