Solvent regulation strategy of Co-MOF-74 microflower for supercapacitors  

作　　者：Changli Wang Xinran Li Wenping Yang Yuxia Xu Huan Pang 

机构地区：[1]School of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225009,China [2]Guangling College,Yangzhou University,Yangzhou 225009,China

出　　处：《Chinese Chemical Letters》2021年第9期2909-2913,共5页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.U1904215,21671170,21673203);the Topnotch Academic Programs Project of Jiangsu Higher Education Institutions(TAPP);Changjiang scholars program of the Ministry of Education(No.Q2018270);Excellent doctoral dissertation of Yangzhou university;Undergraduate scientific research innovation projects in Jiangsu province(No.201911117036Z)。

摘　　要：Metal-organic frameworks(MOFs)with porous crystal structures have attracted extensive attention in application of energy storage and conversion,owing to their regularity,porosity,large specific surface area,etc.In this work,Co-MOF-74 microflower has been successfully prepared via a controllable solvent regulation strategy.Through modulating the polarity of the solvent,crystals grow in certain preferred orientation and Co-MOF-74 with various morphologies were obtained.Thereinto,the energy storage performance of Co-MOF-74 microflower was measured in both three-electrode system and asymmetric supercapacitor device(specific capacitance of 164.2 F/g at 0.5 A/g in the three-electrode system and 62.5 F/g at 1 A/g in the asymmetric supercapacitor device).This can be attributed to the preferred crystal orientation resulting in a regular and uniform microflower,which is of great significance to electronic interfacial exchange and ion transfer during electrochemical reactions.

关 键 词：Metal-organic frameworks Solvent regulation strategy Co-MOF-74 microflower Pseudocapacitive-controlled behavior Asymmetric supercapacitor device 

分 类 号：TB34[一般工业技术—材料科学与工程] TM53[电气工程—电器]