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Negative electrodes for supercapacitors with good performance using conductive bismuth-catecholate metal-organic

Si Chen1, Haoliang Zhang1, Xu Li1

  • 1Key Laboratory of Nuclear Solid-State Physics Hubei Province, School of Physics and Technology, Wuhan University, Wuhan 430072, China. hecq@whu.edu.cn.

Dalton Transactions (Cambridge, England : 2003)
|March 20, 2023
PubMed
Summary
This summary is machine-generated.

Conductive bismuth-catecholate nanobelts (Bi(HHTP)) show promise for energy storage. These materials offer high capacitance and stability, advancing negative electrode development for supercapacitors.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Metal-organic frameworks (MOFs) are researched for various applications but suffer from poor conductivity, limiting their use in energy storage.
  • Two-dimensional conductive coordination frameworks offer improved electrochemical performance due to charge delocalization.
  • Developing conductive MOFs is crucial for advanced energy storage devices.

Purpose of the Study:

  • To synthesize π-π coupling conductive bismuth-catecholate nanobelts (Bi(HHTP)) with tunable lengths.
  • To investigate the length-dependent electrochemical properties of Bi(HHTP) nanobelts.
  • To explore Bi(HHTP) as a negative electrode material for supercapacitors.

Main Methods:

  • Hydrothermal synthesis of Bi(HHTP) nanobelts.
  • Electrochemical characterization of synthesized nanobelts.
  • Investigation of charge storage mechanisms.

Main Results:

  • Successful synthesis of Bi(HHTP) nanobelts with tunable lengths (approx. 10 μm).
  • Bi(HHTP) nanobelts exhibit good porosity, redox-active sites, and electrical conductivity.
  • As a negative electrode, Bi(HHTP) achieved a high specific capacitance (234.0 F g⁻¹) and 72% cycling stability after 1000 cycles.
  • Charge storage mechanism involves both battery-type and surface-capacitive behaviors.

Conclusions:

  • Bi(HHTP) nanobelts are effective negative electrode materials for supercapacitors.
  • The results highlight the potential of π-π coupling conductive coordination frameworks for high-performance energy storage.
  • This work provides insights for designing novel battery-type negative electrode materials.