摘要
以钼酸钠、氯化钴为原料,采用简单化学沉淀法制备前驱体CoMoO4,然后将CoMoO4和Na2S通过离子交换反应合成双金属硫化物CoMoS4。采用X射线衍射(XRD)、扫描电镜(FESEM)、比表面积测试(BET)表征了产物的组成、结构和形貌,用循环伏安、恒电流充放电等测试方法对电极材料的电化学性能进行了研究。结果表明,当电流密度为1 A/g时,CoMoS4电极材料的比电容值为456 F/g,是Co-S的2. 8倍,Mo-S的1. 4倍;且1 000次循环后,比电容仍保持88%,电极材料显示出良好的电化学性能。
By using NaMoO4·2H2O and CoCl2·6H2O as raw materials,the CoMoO4 precursor was synthesized via a chemical coprecipitation method.Then the CoMoO4 precursor and Na2S was ion-exchanged to form bimetallic sulfide of CoMoS4.The composition,microstructure and morphology of the samples were systematically characterized by X-ray diffraction(XRD),field emission scanning electron microscopy(FESEM)and Brunner-Emmet-Teller(BET)measurement.The electrochemical performance were investigated by cyclic voltammetry and constant current charge/discharge techniques.The results show that the CoMoS4 electrode material has excellent electrochemical performance.The composites have a superior specific capacitance of 456 F/g at 1 A/g,which is 2.8 times of the Co-S nanoparticles and 1.4 times of the Mo-S nanoparticles,and remains about 88%of the initial capacitance after 1000 cycles at current density of 1 A/g,indicating the CoMoS4 composite of excellent electrochemical performance.
作者
金小青
邢佳斌
任瑞鑫
齐亚娥
JIN Xiao-qing;XING Jia-bin;REN Rui-xin;QI Ya-e(Key Laboratory of Hexi Corridor Resourses Utilization of Gansu,College of Chemistry and Chemical Engineering,Hexi University,Zhangye 734000,China)
出处
《化学试剂》
CAS
北大核心
2019年第10期1031-1036,共6页
Chemical Reagents
基金
甘肃省大学生创新创业训练计划项目(2017-229)
甘肃省河西走廊特色资源利用重点实验室面上项目(XZ1809)
甘肃科技计划资助项目(18JR3RG203)
