钴基金属有机框架材料的制备及其电容性能研究  

Preparation of Cobalt-Based Metal Organic Frameworks Materials and Study of Its Capacitive Performance

作　　者：鲁珍[1] 胡志威 孔志博 李霞[1] 罗会秀 王亚珍[1] LU Zhen;HU Zhiwei;KONG Zhibo;LI Xia;LUO Huixiu;WANG Yazhen(Hubei Key Laboratory of Industrial Fume and Dust Pollution Control,School of Chemistry and Environmental Engineering,Jianghan University,Wuhan 430056,Hubei,China)

机构地区：[1]江汉大学工业烟尘污染控制湖北省重点实验室,化学与环境工程学院,湖北武汉430056

出　　处：《江汉大学学报（自然科学版）》2020年第3期36-43,共8页Journal of Jianghan University：Natural Science Edition

基　　金：工业烟尘污染控制湖北省重点实验室开放基金(HBIK2019-2);江汉大学大学生创新训练重点项目(201911072019)。

摘　　要：以六水合硝酸钴(Co(NO3)2·6H2O)中钴离子为中心金属离子,以均苯三甲酸(BTC)为有机配体,通过一步水热法合成了钴基金属有机框架(MOFs)材料(Co-BTC MOFs),并将其设计为超级电容器电极材料,通过循环伏安法、恒流充放电法等研究了其电化学性能。试验通过控制变量法合成了5种不同反应物摩尔比下的MOFs材料,并对材料的结构和形貌通过扫描电镜和X-射线衍射进行了表征。研究结果表明,在温度为140℃的条件下,Co(NO3)2·6H2O与BTC以摩尔比为1∶7时合成的钴基MOFs材料用作超级电容器电极材料,恒流充放电显示在电流密度为0.5 A/g时材料的比电容可达289.3 F/g,说明该摩尔比下的Co-BTC MOFs具有较高的比电容;在10 A/g的电流密度下经过1000次循环充放电后材料的比电容保持率为87.59%,说明该材料具有较高的循环稳定性。In this study,cobalt-based metal organic frameworks(Co-BTC MOFs)materials were synthesized based on Co(NO 3)2·6H 2 O as the central ion and 1,3,5-Benzenetricarboxylicacid(BTC)as the organic ligand and it was used as the electrode material for the supercapacitor.The electrochemical properties of them were studied by cyclic voltammetry and galvanostatic charge-discharge.The Co-BTC MOFs materials with 5 kinds of different molar ratio of reactants were prepared using the control variable method,and then the morphology and structure of them were characterized by scanning electron microscopy(SEM)and X-ray diffraction(XRD).The results indicated that Co-BTC MOFs exhibited a high galvanostatic charge-discharge specific capacitance of 289.3 F/g at the current density of 0.5 A/g while the molar ratio of Co(NO 3)2·6H 2 O to BTC was 1∶7 and the reaction temperature was 140℃.The specific capacitance retained 87.59%of its initial discharge capacitance after 1000 cycles at a current density of 10 A/g,which illustrated it had a high cyclic stability.

关 键 词：1 3 5-均苯三甲酸 钴基MOFs材料 超级电容器 比电容 摩尔比 

分 类 号：TM532[电气工程—电器]