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Covalent Functionalization Yields High-Performance Supercapacitor Materials.

Neha Singh1, Priyanka Makkar1, Pradeep Sachan1

  • 1Department of Chemistry, Indian Institute of Technology, Kanpur, Uttar Pradesh, 208016, India.

Small (Weinheim an Der Bergstrasse, Germany)
|September 4, 2025
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Summary
This summary is machine-generated.

This study introduces a novel organic-inorganic hybrid material for high-performance supercapacitors. The new electrode material offers excellent capacitance and stability for advanced energy storage solutions.

Keywords:
8‐aminoquinolineCuFe2O4aryl diazonium salts chemistrycovalent modificationsolid‐state symmetric supercapacitor device

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Organic-inorganic hybrid materials offer synergistic advantages for energy storage.
  • Supercapacitors require advanced electrode materials for higher energy density and stability.
  • Eco-friendly and high-performance energy storage is crucial for portable electronics.

Purpose of the Study:

  • To synthesize and characterize a novel organic-inorganic hybrid electrode material.
  • To investigate the synergistic effects of organic and inorganic components on supercapacitor performance.
  • To evaluate the potential of the synthesized material for flexible and wearable energy storage.

Main Methods:

  • Grafting of 8-aminoquinoline diazonium salts onto CuFe2O4 nanoparticle surfaces.
  • Surface analysis to confirm covalent functionalization and interface formation.
  • Fabrication and electrochemical testing of all-solid-state symmetric supercapacitors.

Main Results:

  • Successful synthesis of 8-Q-CuFe2O4 heterostructure with reduced interfacial resistance.
  • Demonstrated high specific capacitance (418.3 F g-1) and excellent cycling stability (81.2% after 11,000 cycles).
  • Achieved high energy density (35.2 Wh kg-1) at a power density of 1,600 W kg-1.

Conclusions:

  • The 8-Q-CuFe2O4 heterostructure exhibits synergistic charge transfer, leading to enhanced supercapacitor performance.
  • The material is suitable for high-performance, flexible, and wearable energy storage applications.
  • This work advances sustainable and portable energy technology.