用于非对称超级电容器的S掺杂NiTe电极材料的制备及性能研究  

Preparation and properties of S doped NiTe electrode material for asymmetric supercapacitor

作　　者：叶蓓融 黄妙良[1] 范乐庆[1] 林建明[1] 吴季怀[1] YE Beirong;HUANG Miaoliang;FAN Leqing;LIN Jianming;WU Jihuai(Institute of Material Physical Chemistry,Huaqiao University, Xiamen 361021,China;College of Materials Science and Engineering, Huaqiao University, Xiamen 361021,China;Engineering Research Center of Environment Friendly Functional Materials,Ministry of Education,Huaqiao University, Xiamen 361021,China)

机构地区：[1]华侨大学材料物理化学研究所材料科学与工程学院环境友好功能材料教育部工程研究中心,福建厦门361021

出　　处：《功能材料》2017年第12期12193-12199,共7页Journal of Functional Materials

基　　金：促进海峡两岸科技合作联合基金重点资助项目(U1205112);福建省自然科学基金资助项目(2010J01289)

摘　　要：用简单的一步水热法制备了S掺杂的NiTe(NiTe∶S)纳米片。利用X射线衍射(XRD)、能谱仪(EDS)以及场发射扫描电镜(FESEM)等分析技术对材料物相和形貌进行表征。并将制得的NiTe∶S作为超级电容器的电极材料,电化学性能测试结果表明,S∶Te掺杂的比例对材料的电化学性能有较大的影响,当x(S)∶x(Te)=3∶50时,电极材料在5 A/g的电流密度下的比电容达到887.3 F/g,与未掺杂时相比提高了214%。此外,利用所制备NiTe∶S电极(正极)与活性炭电极(AC)(负极)组装成非对称超级电容器。该非对称超级电容器展现出了优异的电化学性能,其能量密度和功率密度能达32.8 Wh/kg和800.5 W/kg。In this paper,flake like S doped NiTe was synthesized by one step hydrothermal method.The phase and morphology of the materials were characterized by X-ray diffraction(XRD),energy dispersive spectroscopy(EDS)and field emission scanning electron microscopy(FESEM).The results show that the doping ratio of S to Te had a great influence on the electrochemical properties of NiTe∶S as the electrode material of supercapacitor.When the molar ratio of S∶Te was3∶50,the specific capacitance of the electrode material at a current density of5A/g reached887.3F/g,which was increased by214%compared to undoped one.Furthermore,the as prepared NiTe∶S electrode(as positive electrode)was assembled with an AC electrode(as negative electrode)to form an asymmetric supercapacitor(ASC).The ASC exhibited an excellent electrochemical performance and the energy density and power density could reach32.8Wh/kg and800.5W/kg,respectively.

关 键 词：超级电容器 碲化镍 硫掺杂 

分 类 号：TM53[电气工程—电器] O614.813[理学—无机化学]