机械化学法制备高比表面积碳负载NiO超级电容器材料  

Mechanochemical Synthesis of High Surface Area Carbon Deposited Supercapacitor Materials NiO

作　　者：张伟[1] 徐洪峰[1] 

机构地区：[1]大连交通大学环境与化学工程学院,辽宁大连116028

出　　处：《大连交通大学学报》2009年第6期53-56,共4页Journal of Dalian Jiaotong University

基　　金：国家自然科学基金资助项目(20776023)

摘　　要：采用机械化学法制备NiO/C复合电容材料,用X射线(XRD)和透射电镜(TEM)研究了复合电容材料的晶型、形貌及粒径;用循环伏安、恒电流充放电和交流阻抗研究了其超级电容性能.研究结果表明:NiO/C复合材料球磨20 h后粒径由30 nm减小到为15 nm左右,在5 mA/cm2电流密度下材料的比电容由球磨前的74 F/g增大到170 F/g,电极电化学反应的等效串联内阻由1.355Ω减小到0.81Ω.A composite material capacitance NiO/C was synthesized by mechano-chemical route.X-ray diffraction（XRD） and transmission electron microscopy（TEM） were used to study the crystalline material morphology and particle size,and cyclic voltammetry（CV）,galvanostatic charge-discharge and AC impedance were empilyed to evaluate the performance of the super-capacitor.The results show that the particle size of the NiO/C is reduced from 30 nm to 15 nm after 20 hour ball milling.The capacitance is increased from 74 F/g to 170 F/g after ball milling under the current density of 5 mA/cm^2.The equivalent series resistance of electrochemical reaction is decreased from 1.355 Ω to 0.81 Ω.

关 键 词：超级电容器 氧化镍 机械化学 活性炭 

分 类 号：TM53[电气工程—电器]