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Elaborate Control of Inkjet Printer for Fabrication of Chip-based Supercapacitors

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Published on: November 30, 2021

Environmentally Friendly Water-Based Reduced Graphene Oxide/Cellulose Nanofiber Ink for Supercapacitor Electrode

Kiran I Nargatti¹, Sandeep S Ahankari¹, John Ryan C Dizon²

¹School of Mechanical Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India.

|March 18, 2024

Summary

Cellulose nanofiber (CNF) prevents reduced graphene oxide (rGO) agglomeration in water-based inks. This innovation enables eco-friendly printing of supercapacitor electrodes with enhanced performance and hydrophilicity.

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Area of Science:

Materials Science
Nanotechnology
Electrochemistry

Background:

Reduced graphene oxide (rGO) agglomeration in aqueous solutions hinders its application in printed electronics.
Developing stable, high-performance rGO inks is crucial for fabricating advanced energy storage devices like supercapacitors.

Purpose of the Study:

To investigate the use of cellulose nanofiber (CNF) as a nanospacer to stabilize rGO in water-based inks.
To fabricate and characterize rGO/CNF films for supercapacitor applications.
To optimize CNF concentration for improved electrochemical performance.

Main Methods:

Fabrication of water-based reduced graphene oxide/cellulose nanofiber (rGO/CNF) inks.
Preparation of rGO/CNF films via printing methods.
Characterization of film hydrophilicity and electrical conductivity.
Electrochemical performance evaluation of supercapacitor electrodes.

Main Results:

rGO/CNF films exhibited enhanced hydrophilicity without binders/surfactants.
Good electrical conductivity was maintained in the rGO/CNF films.
The rGO/CNF-15 film achieved a maximum areal capacitance of 98.61 mF/cm² at 1 mA/cm².
Electrochemical performance was dependent on CNF concentration.

Conclusions:

CNF effectively prevents rGO agglomeration, enabling stable, eco-friendly inks.
The developed rGO/CNF inks offer a promising route for printing high-performance supercapacitor electrodes.
This approach combines environmental friendliness with excellent electrochemical properties for energy storage applications.