铜
超级电容器
材料科学
电极
dBc公司
电容
氧化还原
电导率
共轭体系
电阻率和电导率
重量分析
化学
化学工程
光电子学
冶金
聚合物
物理化学
电气工程
复合材料
有机化学
工程类
CMOS芯片
作者
Jingjuan Liu,Yi Zhou,Zhen Xie,Yang Li,Yunpeng Liu,Jie Sun,Yanhang Ma,Osamu Terasaki,Лонг Чэн
标识
DOI:10.1002/anie.201912642
摘要
A conjugated copper(II) catecholate based metal-organic framework (namely Cu-DBC) was prepared using a D2 -symmetric redox-active ligand in a copper bis(dihydroxy) coordination geometry. The π-d conjugated framework exhibits typical semiconducting behavior with a high electrical conductivity of ca. 1.0 S m-1 at room temperature. Benefiting from the good electrical conductivity and the excellent redox reversibility of both ligand and copper centers, Cu-DBC electrode features superior capacitor performances with gravimetric capacitance up to 479 F g-1 at a discharge rate of 0.2 A g-1 . Moreover, the symmetric solid-state supercapacitor of Cu-DBC exhibits high areal (879 mF cm-2 ) and volumetric (22 F cm-3 ) capacitances, as well as good rate capability. These metrics are superior to most reported MOF-based supercapacitors, demonstrating promising applications in energy-storage devices.
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