| 509 | 8 | 10 |
| 下载次数 | 被引频次 | 阅读次数 |
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1 000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。
Abstract：In this study, cobalt-based metal organic frameworks(Co-BTC MOFs)materials were synthesized based on Co(NO3)2·6 H2O 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(NO3)2·6 H2O to BTC was 1∶7 and the reaction temperature was 140 ℃. The specific capacitance retained 87. 59 % of its initial discharge capacitance after 1 000 cycles at a current density of 10 A/g,which illustrated it had a high cyclic stability.
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基本信息:
DOI：10.16389/j.cnki.cn42-1737/n.2020.03.006
中图分类号:O641.4;TM53
引用信息:
[1]鲁珍,胡志威,孔志博等.钴基金属有机框架材料的制备及其电容性能研究[J].江汉大学学报(自然科学版),2020,48(03):36-43.DOI:10.16389/j.cnki.cn42-1737/n.2020.03.006.
基金信息:
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)