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MOS Capacitor

MOS Capacitor

A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...

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

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Published on: January 7, 2022

Free-standing electrochemically coated MoS_x based 3D-printed nanocarbon electrode for solid-state supercapacitor

Kalyan Ghosh¹, Martin Pumera

¹Future Energy and Innovation Laboratory, Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 61200 Brno, Czech Republic. pumera.research@gmail.com.

|March 16, 2021

Summary

This study introduces 3D-printed molybdenum sulfide (MoS_x) electrodes for advanced energy storage. These electrodes offer high capacitance and stable performance in supercapacitors.

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Area of Science:

Materials Science
Electrochemistry
Nanotechnology

Background:

3D-printing enables cost-effective fabrication of customized electrodes for energy storage.
Molybdenum sulfide (MoS_x) is a promising 2D nanomaterial for electrochemical energy storage devices.

Purpose of the Study:

To develop 3D-printed electrodes coated with MoS_x for enhanced supercapacitor performance.
To investigate the integration of 3D-printing and electrodeposition for energy storage applications.

Main Methods:

A nanocarbon-based conductive filament was 3D-printed and activated.
Molybdenum sulfide (MoS_x) was electrodeposited onto the 3D-printed nanocarbon electrode.
Electrochemical performance was tested in a three-electrode system and in solid-state supercapacitors.

Main Results:

The MoS_x coated 3D-printed electrode (MoS_x@3D-PE) exhibited capacitances of 27 mF cm^-2 (10 mV s^-1) and 11.6 mF cm^-2 (0.13 mA cm^-2).
An interdigital solid-state supercapacitor (SS-SC) achieved a specific capacitance of 4.15 mF cm^-2 (0.05 mA cm^-2).
The SS-SC demonstrated excellent cycle stability with only a 10% capacitance loss after 10,000 cycles.

Conclusions:

The integration of 3D-printing and electrodeposition provides a simple method for fabricating customized free-standing 3D electrodes.
The developed MoS_x@3D-PE electrodes show significant potential for supercapacitor applications.
This approach facilitates the development of high-performance, stable, and customizable energy storage devices.