金属有机骨架Zn-BTC/rGO复合材料的制备和性能  

Fabrication and Performance of Metal Organic Framework Zn-BTC/rGO Nanocomposites

作　　者：谭上荣 姚焯 刘泽辰 蒋奕蕾 郭诗琪 李丽丽[1] TAN Shangrong;YAO Zhuo;LIU Zechen;JIANG Yilei;GUO Shiqi;LI Lili(College of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China)

机构地区：[1]辽宁科技大学材料与冶金学院,鞍山114051

出　　处：《材料研究学报》2024年第8期576-584,共9页Chinese Journal of Materials Research

基　　金：辽宁省教育厅高等院校科研项目(LJKZ0290)。

摘　　要：用超声震荡法合成不同形貌的石墨烯负载Zn-BTC金属有机骨架材料,并将其用做电极组装超级电容器。用TG曲线、SEM观察、XRD谱、Brunauer-Emmett-Teller模型和Raman谱等手段表征材料的结构、形貌和电化学性能,使用电化学工作站和三电极体系测试了超级电容样品的电化学性能。结果表明,合成的一维棒状Zn-BTC均匀锚定在褶皱的石墨烯纳米片层上,其比电容为182.4 C·g^(-1)(1 A·g^(-1)),优于石墨烯负载的二维片状Zn-BTC(139.3 C·g^(-1))、石墨烯(97.9 C·g^(-1))和一维棒状Zn-BTC(62.8 C·g^(-1))。使用石墨烯负载的一维棒状Zn-BTC组装的对称超级电容器,在电流密度为1 A·g^(-1)、比容量为57.7 F·g^(-1)、功率密度为1390 W·kg^(-1)条件下的最大能量密度为1.99 Wh·kg^(-1),经过2000次充放电循环后其比容量保持率为90.3%。As electrode material for supercapacitors,graphene-supported Zn-BTC metal-organic framework materials(Zn-BTC/rGO)with different morphologies were synthesized via a simple ultrasonic vibration method.The prepared Zn-BTC/rGO materials were characterized by means of TG,SEM,XRD,BET,Raman and electrochemical workstation in terms of the structure,morphology and electrochemical property.Their capacitance performance was examined by a three-electrode system.The results show that the synthesized one-dimensional rod-like Zn-BTC is uniformly anchored to the wrinkled layer of graphene nanosheets,and the material exhibits excellent capacitance performance,with a specific capacitance of 182.4 C·g^(-1)(1 A·g^(-1)),which is better than the graphene-supported two-dimensional sheet-like Zn-BTC(139.3 C·g^(-1)),graphene(97.9 C·g^(-1))and simple one-dimensional rod-like Zn-BTC(62.8 C·g^(-1)).A symmetrical supercapacitor was assembled with the graphene supported one-dimensional rod-shaped Zn-BTC,which presents excellent performance:the specific capacity of 57.7 F·g^(-1)at a current density of 1 A·g^(-1),the maximum energy density of 1.99 Wh·kg^(-1)at a power density of 1390 W·kg^(-1),and the specific capacity retention rate of 90.3%after 2000 charge-discharge cycles.

关 键 词：复合材料 金属有机骨架 Zn-BTC 石墨烯 超级电容器 

分 类 号：TB332[一般工业技术—材料科学与工程]