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Conjugated Copper-Catecholate Framework Electrodes for Efficient Energy Storage.

Jingjuan Liu1, Yi Zhou2, Zhen Xie1

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|November 2, 2019
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Summary
This summary is machine-generated.

A novel conjugated copper(II) catecholate metal-organic framework (Cu-DBC) demonstrates excellent semiconducting properties and high electrical conductivity. This material shows promising performance for advanced energy-storage supercapacitors.

Keywords:
catecholatecoppermetal-organic frameworkssemiconductorssupercapacitors

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Metal-organic frameworks (MOFs) are increasingly explored for energy storage applications.
  • Developing MOFs with high electrical conductivity and redox activity is crucial for enhanced supercapacitor performance.

Purpose of the Study:

  • To synthesize and characterize a conjugated copper(II) catecholate based MOF (Cu-DBC).
  • To investigate the semiconducting behavior and electrical conductivity of the Cu-DBC framework.
  • To evaluate the supercapacitor performance of Cu-DBC electrodes for energy storage applications.

Main Methods:

  • Synthesis of a D2-symmetric redox-active ligand and preparation of the Cu-DBC MOF.
  • Characterization of the π-d conjugated framework and its semiconducting properties.
  • Fabrication and electrochemical testing of Cu-DBC based supercapacitor devices.

Main Results:

  • The Cu-DBC framework exhibits semiconducting behavior with high room-temperature electrical conductivity (ca. 1.0 S/m).
  • Cu-DBC electrodes show superior gravimetric capacitance (up to 479 F/g) due to good conductivity and redox reversibility.
  • Symmetric solid-state supercapacitors achieved high areal (879 mF/cm²) and volumetric (22 F/cm³) capacitances with good rate capability.

Conclusions:

  • The synthesized Cu-DBC MOF possesses excellent electrical conductivity and electrochemical properties.
  • Cu-DBC demonstrates superior supercapacitor performance compared to most reported MOF-based devices.
  • This material holds significant promise for the development of next-generation energy-storage devices.