基于2,6NDC的二维纳米阵列MOF材料的制备及其在超级电容器中的应用  

Preparation of 2,6NDC-Based Two-Dimensional Nanoarray MOFs Materials and Its Application in Supercapacitors

作　　者：刘羽 张海亮 王开鹰 张果丽 贾晓霞 李刚[1] Liu Yu;Zhang Hailiang;Wang Kaiying;Zhang Guoli;Jia Xiaoxia;Li Gang(Institute of Energy Revolution Innovation,School of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学材料科学与工程学院能源革命创新研究院,太原030024

出　　处：《微纳电子技术》2023年第7期1027-1036,共10页Micronanoelectronic Technology

基　　金：山西省自然科学基金(20210302124334,20210302124421)。

摘　　要：金属有机框架(MOF)具有比表面积较大、形貌多样和金属中心丰富等优点。然而传统的以对苯二甲酸(BDC)为配体的MOF直接用作超级电容器电极材料时其比电容低、稳定性差。为此以双苯环有机配体2,6萘二羧酸(2,6NDC)为链接剂,采用简单高效的一步溶剂热法成功合成了超薄片状2D纳米阵列2,6NDC MOF材料,对其物相结构和表面形貌进行了表征分析,并探究了其电化学性能。结果表明,在电流密度为1 A·g^(-1)下,基于2,6NDC的超薄片状2D纳米阵列MOF具有较高的比电容,为136.2 F·g^(-1),而以BDC为配体的MOF比电容只有53.9 F·g^(-1)。以2,6NDC MOF构筑的超级电容器在电流密度0.5 A·g^(-1)下的能量密度为28.2 W·h·kg^(-1),功率密度为1650.7 W·kg^(-1),且在15000次循环后依然有约125%的初始放电比容量,显示出优异的循环稳定性。Metal organic frameworks(MOFs)have advantages such as large specific surface area,diverse morphologies and abundant metal centers.However,when the traditional MOFs with terephthalic acid(BDC)as the ligand are directly used as the electrode material of supercapacitors,their specific capacitance is low and the stability is poor.By using the biphenylene ring organic ligand 2,6 naphthalene-dicarboxylic acid(2,6NDC)as a linker,the ultrathin sheet-like 2D nanoarrays of 2,6NDC MOFs materials were successfully synthesized by a simple and efficient one-step solvothermal method.The physical phase structure and surface morphology of the 2,6NDC MOFs materials were characterized and analyzed,and their electrochemical properties were explored.The results show that the ultrathin sheet-like 2D nanoarray MOFs based on 2,6NDC have a high specific capacitance of 136.2 F·g^(-1)at a current density of 1 A·g^(-1),while the specific capacitance of the MOFs with BDC as the ligand is only 53.9 F·g^(-1).The supercapacitor constructed with 2,6NDC MOFs has an energy density of 28.2 W·h·kg^(-1)and a power density of 1650.7 W.kg^(-1)at a current density of 0.5 A·g^(-1),and still has an initial discharge specific capacity of about 125%after 15000 cycles,showing excellent cycling stability.

关 键 词：金属有机框架(MOF) 纳米阵列 超级电容器 2 6萘二羧酸(2 6-NDC) 溶剂热法 纳米材料 

分 类 号：TB383[一般工业技术—材料科学与工程] TM53[电气工程—电器]