电沉积电流密度对NiO/CNT复合电极的影响  

Influences of electrodeposit current density on NiO/CNT composite electrode

作　　者：于丹娜[1] 张浩[2] 张世超[1] 曹高萍[2] 

机构地区：[1]北京航空航天大学材料科学与工程学院,北京100191 [2]防化研究院,北京100083

出　　处：《电池》2009年第3期117-119,共3页Battery Bimonthly

基　　金：国家自然科学基金重点项目(20633040)

摘　　要：采用电化学沉积法,以碳纳米管(CNT)为基体沉积Ni(OH)2,热处理制备NiO/CNT复合电极。采用XRD、SEM、TEM、循环伏安和恒流充放电,研究了电沉积电流密度对复合电极的影响。沉积电量为9 C时,随着电流密度的增加,NiO易沉积在电极表面,形成块体并阻塞离子通道,使复合电极的比电容下降。以1 mA/cm2制备的复合电极,以0.4 A/g、20.0 A/g充放电时,比电容分别为1686 F/g和926 F/g。NiO/carbon nanotube（CNT）composite electrode was prepared by electrodepositing Ni（ OH）2 on the substrate CNT and then heat treatment via a electrochemical deposition method. The influences of electrodeposit current density on the composite electrode were researched by XRD, SEM, TEM ,cyclic voltammetry and galvanostatic charge-discharge. When deposition electric quantity was 9 C, NiO tended to deposite on the surface of the electrode, formed agglomerates to block the ion channel as the deposition current increased, and decreased the specific capacitance. The specific capacitances of the composite electrode prepared at 1 mA/cm^2 were 1 686 F/g and 926 F/g,respectively, when charge-discharge at 0.4 A/g and 20.0 A/g.

关 键 词：碳纳米管(CNT) 氧化镍(NiO) 比电容 超级电容器 

分 类 号：TM53[电气工程—电器]