循環(huán)伏安性能的影響
(哈爾濱工業(yè)大學(xué) 應(yīng)用化學(xué)系， 哈爾濱 150001)
摘 要: 采用沉淀轉(zhuǎn)化法制備出納米級Ni(OH)2 ， 研究了干燥溫度對材料團(tuán)聚程度和電化學(xué)循環(huán)伏安性能的影響。 XRD 和TEM 測試結(jié)果表明： 所制備的材料為納米級β-Ni(OH)2 ， 晶粒尺寸在10～100nm之間。 干燥溫度對納米級Ni(OH)2的團(tuán)聚程度有較大影響， 并可以在一定程度上控制材料的密度。 循環(huán)伏安測試表明： 適當(dāng)團(tuán)聚的納米級Ni(OH)2 比微米級的具有更優(yōu)越的電化學(xué)循環(huán)伏安性能， 其質(zhì)子擴(kuò)散系數(shù)也較大。
關(guān)鍵字: 納米材料；團(tuán)聚； Ni(OH)2； 粉末微電極； 干燥溫度
（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
