A conductive anionic Co-MOF cage with zeolite framework for supercapacitors  

作　　者：Wei Du Yue-Ling Bai Zhen Yang Runlong Li Dan Zhang Zhiheng Ma Anbao Yuan Jiaqiang Xu 

机构地区：[1]College of Science,Shanghai University,Shanghai 200444,China

出　　处：《Chinese Chemical Letters》2020年第9期2309-2313,共5页中国化学快报（英文版）

基　　金：the National Key Research and Development Program of China(Nos.2017YFB0102200,2017YFB0102900);the National Natural Science Foundation of China(No.21571126);the Shanghai Key Laboratory of High Temperature Superconductors(Nos.14DZ2260700,16DZ0504300)for financial support。

摘　　要：Conductive MOFs could exhibit full potential as integrated electrode materials for supercapacitors without interference from additional conductive additives.Here we report an anionic Co-MOF cage with zeolite framework,which was balanced by the redox-active guest [Co(H2O)6]2+ and protonated[(CH3)2NH2]2+ ions.Benefit from the unique ion skeleton structure,Co-MOF exhibits a conductivity higher than most of reported MOFs with the value of 1.42 × 10^-3 S/cm,which can be directly fabricated as electrode for supercapacitors.A maximum specific capacitance of 236.2 F/g can be achieved at a current density of 1 A/g of Co-MOF.Additionally,the electric performance and morphology of this Co-MOF can be modified by cetyltrimethylammonium bromide(CTAB) and the maximum specific capacitance could increase up to 334 F/g at 1 A/g when the ratio of ligand and CTAB is 1:6(Co-MOF-6).Furthermore,the specific capacitance can retain at 64.04% and 77.92% of the initial value after 3000 cycles of Co-MOF and Co-CTAB-6,respectively.Obviously,the addition of CTAB further improves both capacitance and cycle stability.

关 键 词：Metal organic frameworks SUPERCAPACITORS Cetyltrimethylammonium bromide In-situ growth Redox-active guest 

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