电化学研磨法制备超细镍粉  

Preparation of ultra-fine nickel by electrochemical milling method

作　　者：李彩翠[1] 张大伟[1,2] 陈静娟[1] 陈春华[2] 

机构地区：[1]合肥工业大学化工学院,安徽合肥230009 [2]中国科学技术大学材料科学与工程系,安徽合肥230026

出　　处：《功能材料》2012年第3期282-286,共5页Journal of Functional Materials

基　　金：国家自然科学基金青年基金资助项目(20703013);中国博士后基金资助项目(20070410218)

摘　　要：以锂离子电池为微反应器,电化学还原NiO制备了超细镍粉。X射线衍射结果表明所得粉末为纯相Ni,晶粒尺寸约5nm。激光粒度分布测试结果表明Ni粒度分布较窄,中位径集中在200～600nm。透射电镜照片显示颗粒粒径在80～200nm之间;放电电流密度的增加和放电温度的提高都使产物粒径有变大的趋势;在分散过程中加入不同的表面活性剂,可以提高产物Ni的分散性能。Ultra-fine nickel powders were prepared by electrochemical reduction of NiO powder using lithium-ion battery as a micro-reactor.X-ray measurement shows that the synthesized powder consists of pure nickel phase with grain size of about 5nm.Laser particle size determination shows the nickel powder has a narrow particle size distribution with D50 in the range of 200-600nm.Transmission electron microscopy shows the nickel powder is 80-200nm.The particle size increases when increasing the discharge current density and discharge temperature.The dispersion performance of nickel can be optimized by surfactants.

关 键 词：超细镍粉 电化学还原法 分散性能 表面活性剂 

分 类 号：TQ138[化学工程—无机化工]