MnO_2/碳纳米球电化学超级电容器电极材料的制备与性能研究  

Preparation and property study of MnO_2/CNPs as electrode materials of electrochemical supercapacitors

作　　者：江超[1] 李君[1] 陶令令 黄金萍[1] 

机构地区：[1]上海师范大学生命与环境科学学院,上海200234

出　　处：《上海师范大学学报（自然科学版）》2016年第6期663-669,共7页Journal of Shanghai Normal University(Natural Sciences)

摘　　要：利用水热法合成了纳米棒状的MnO_2/碳纳米球(CNPs)作为电化学超级电容器的电极材料.利用场发射扫描电镜(FESEM)、X射线衍射光谱分析(XRD)对样品的微观形貌、物相进行分析;利用循环伏安法和恒电流充放电测试材料的电化学性能.结果表明:纳米棒状MnO_2/CNPs复合材料具有良好的电化学性能.在0.1 A/g的电流密度,1 mol/L Na_2SO_4电解液中,电极材料的比电容高达305.6 F/g,远高于纯碳球的比电容(49.3 F/g),当电流密度增至5 A/g时,材料的比电容为235 F/g,比电容仍能保持76.9%.MnO2 nanorods deposited on carbon nanospheres （MnO2/CNPs） as electrode materials of electrochemical supercapac-itors have been synthesized via a hydrothermal synthesis. The micro morphologies and phases of the as-prepared MnO2/CNPs were characterized by field emission scanning electro microscopy （ FESEM） and X-ray diffraction（ XRD）. The electrochemical proper-ties of nanomaterials were tested by cyclic voltammetry and galvanostatic charge-discharge. At a current density of 0. 1 A/g using 1 mol/L Na2SO4 as electrolyte,the as-prepared MnO2/CNPs exhibit excellent specific capacitance of 305. 6 F/g,far larger than carbon nanospheres （49. 3 F/g）. At a current density of 5 A/g,the specific capacitance of MnO2/CNPs is 235 F/g, which is 76. 9% of the specific capacitance under 1 A/g current density. These results demonstrated that MnO2/CNPs may show potential ap-plication for electrode materials in electrochemical supercapacitors.

关 键 词：水热合成 MnO2/CNPs 电化学超级电容器 电极材料 

分 类 号：O611.3[理学—无机化学]