高比电容Mn-MOF材料的制备及其电化学性能  

Preparation of Mn-MOF with high specific capacitance and its electrochemical performances

作　　者：石燕君 赵亚欣 许娟[1] 曹剑瑜[1] 陈智栋[1] SHI Yanjun;ZHAO Yaxin;XU Juan;CAO Jianyu;CHEN Zhidong(School of Petrochemical Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学石油化工学院,江苏常州213164

出　　处：《常州大学学报（自然科学版）》2023年第1期28-33,共6页Journal of Changzhou University：Natural Science Edition

基　　金：国家自然科学基金资助项目(21773018)。

摘　　要：以四水合硝酸锰为锰源,以2,5-吡嗪二羧酸为配体,在N,N-二甲基甲酰胺溶剂中经由溶剂热反应合成了一系列金属有机骨架化合物材料Mn-PDC MOF。通过X射线衍射、扫描电子显微镜和N_(2)吸脱附对Mn-PDC MOF进行了结构、形貌及比表面积与孔径分析,通过循环伏安和恒流充放电测试等电化学技术研究了Mn-PDC MOF的超电容性能。研究结果显示,合成时间为11 h的Mn-PDC-11表现出了较高的比电容,其在0.5 A/g的电流密度下比电容为383.8 F/g,且在1 A/g的电流密度下经500圈充放电循环之后,电化学比容量仍能达到原来的78%。A series of Mn-based metal organic framework(MOF)materials(Mn-PDC MOF)were prepared via solvothermal reaction in N,N-dimethylformamide with manganese nitrate tetrahydrate as manganese source and 2,5-pyrazine dicarboxylic acid as ligand.The Mn-PDC MOF were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM)and nitrogen adsorption-desorption isotherm analysis.The electrochemical capacitance performance of Mn-PDC MOF was investigated by cyclic voltammetry and galvanostatic charge-discharge studies.The experimental results showed that Mn-PDC-11 presented a higher specific capacitance of 383.8 F/g at a current density of 0.5 A/g,and the retention ratio of specific capacitance can maintain 78%after 500 galvanostatic charge-discharge cycles at 1 A/g.

关 键 词：超级电容器 MOF材料 溶剂热反应 电化学性能 

分 类 号：O646[理学—物理化学]