片层状Ni-MOF的制备及其电化学性能研究  

Preparation and Electrochemical Performance of Sheet Structure Ni-MOF

作　　者：孙曼 姜孟芳 柴浚淇 鲁蝶 翟璐璐 郭畋锋 程玉雪 苏畅 SUN Man;JIANG Mengfang;CHAI Junqi;LU Die;ZHAI Lulu;GUO Tianfeng;CHENG Yuxue;SU Chang(Shenyang University of Chemical Technology,Shenyang 110142,China)

机构地区：[1]沈阳化工大学化学工程学院,辽宁沈阳110142

出　　处：《沈阳化工大学学报》2024年第3期214-223,共10页Journal of Shenyang University of Chemical Technology

基　　金：辽宁省高校创新人才支持计划项目(LR2017034);辽宁省教育厅项目(LQ2017010)。

摘　　要：以六水合氯化镍为金属源,对苯二甲酸为配体,采用水热法制备Ni-MOF.利用扫描电子显微镜、傅里叶红外光谱仪、综合热重分析仪和X射线衍射仪对材料的表面形貌和晶体内部结构进行表征,并通过三电极测试对材料的电化学性能进行测试.表面形貌分析测试结果显示:通过水热法制备的Ni-MOF材料呈现出纳米片层状堆叠形貌,其特有的片层状结构对材料的电化学性能产生积极的影响,不仅暴露了更多的活性位点,而且促进了电解液离子在电化学反应过程中的扩散作用.电化学测试结果表明:3 mol/L KOH电解液中,在0.25 A/g的电流密度下,Ni-MOF材料比电容达905 F/g;在10 A/g下,其比电容仍能保持在580 F/g.材料的反应动力学分析结果表明Ni-MOF的氧化还原过程属于典型的由扩散过程控制的电荷存储机制.这些良好的性能都说明金属有机框架作为电极材料在储能领域有较好的应用前景.Ni-MOF was synthesisied with NiCl 2·6H 2O and PTA through a facile hydrothermal method.The surface morphology and internal crystal structure of Ni-MOF was characterized by Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction,thermo gravimetric-differential thermal analysis(TG-DTA)and scanning electron microscopy(SEM).The electrochemical property was tested in the three-electrode system.The surface morphology analysis test results show that the Ni MOF material prepared by hydrothermal method exhibits a nano layered stacking morphology,and its unique layered structure has a positive impact on the electrochemical performance of the material,not only exposing more active sites,but also promoting the diffusion of electrolyte ions in the electrochemical reaction process.The electrochemical test shows that the specific capacitance of Ni-MOF in 3 mol/L KOH electrolyte reaches 905 F/g at the current density of 0.25 A/g.At 10 A/g,the specific capacitance is still maintained at 580 F/g.The results of kinetic analysis show that the REDOX process of Ni-MOF is a typical charge storage mechanism controlled by diffusion process.These good properties indicate that the metal-organic framework as electrode materials has a good application prospect in the field of energy storage.

关 键 词：金属有机框架 纳米片层 超级电容器 电化学 

分 类 号：TQ152[化学工程—电化学工业]