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Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System

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Published on: January 7, 2022

Convergent Covalent Organic Framework Thin Sheets as Flexible Supercapacitor Electrodes.

Abdul Khayum M^1,2, Vidyanand Vijayakumar^1,2, Suvendu Karak^1,2

¹Physical/ Materials Chemistry Division , CSIR-National Chemical Laboratory , Dr. Homi Bhabha Road , Pune 411008 , India.

ACS Applied Materials & Interfaces

|July 28, 2018

Summary

Researchers developed flexible supercapacitor electrodes using a novel covalent organic framework (COF). This material offers high surface area, integrated redox activity, and mechanical strength for advanced energy storage devices.

Keywords:

covalent organic frameworks flexible supercapacitor free-standing electrodes mechanical properties redox chemistry

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Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

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Synthesis and Characterization of Functionalized Metal-organic Frameworks

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Published on: September 5, 2014

Area of Science:

Materials Science
Electrochemistry
Nanotechnology

Background:

Flexible supercapacitors demand lightweight electrodes with high surface area, redox activity, and mechanical integrity.
Integrating these properties into a single electrode material presents a significant challenge in electronic device development.

Purpose of the Study:

To overcome the limitations of current flexible electrode materials.
To synthesize a novel covalent organic framework (COF) with enhanced properties for supercapacitor applications.

Main Methods:

Facile and scalable synthesis of convergent covalent organic framework (COF) thin sheets via solid-state molecular baking.
Utilizing redox-active anthraquinone (Dq) and π-electron-rich anthracene (Da) as linkers in a β-ketoenamine-linked 2D COF.
Fabrication of a solid-state symmetrical flexible COF supercapacitor device.

Main Results:

The synthesized COF thin sheets exhibit intrinsic redox activity due to integrated anthraquinone moieties.
The anthracene linker enhances mechanical properties and inter-crystallite interactions, ensuring flexibility.
The binder-free strategy yields porous, crystalline, crack-free, and lightweight COF sheets with uniform surfaces.

Conclusions:

The developed 2D COF thin sheets offer a promising solution for high-performance flexible supercapacitor electrodes.
The material's unique combination of properties, including redox activity and mechanical robustness, facilitates practical energy storage applications.
This work demonstrates a scalable approach to creating advanced electrode materials for next-generation flexible electronics.