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A conductive anionic Co-MOF cage with zeolite framework for supercapacitors
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作者 Wei Du Yue-ling Bai +5 位作者 Zhen Yang runlong li Dan Zhang Zhiheng Ma Anbao Yuan Jiaqiang Xu 《Chinese Chemical Letters》 SCIE CAS CSCD 2020年第9期2309-2313,共5页
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... 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. 展开更多
关键词 Metal organic frameworks SUPERCAPACITORS Cetyltrimethylammonium bromide In-situ growth Redox-active guest
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