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Conjugated Copper–Catecholate Framework Electrodes for Efficient Energy Storage
Author(s) -
Liu Jingjuan,
Zhou Yi,
Xie Zhen,
Li Yang,
Liu Yunpeng,
Sun Jie,
Ma Yanhang,
Terasaki Osamu,
Chen Long
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201912642
Subject(s) - copper , supercapacitor , materials science , electrode , dbc , capacitance , redox , conductivity , conjugated system , electrical resistivity and conductivity , gravimetric analysis , chemical engineering , optoelectronics , chemistry , metallurgy , polymer , electrical engineering , composite material , organic chemistry , cmos , engineering
A conjugated copper(II) catecholate based metal–organic framework (namely Cu‐DBC) was prepared using a D 2 ‐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.