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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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Synthesizing a Gel Polymer Electrolyte for Supercapacitors, Assembling a Supercapacitor Using a Coin Cell, and Measuring Gel Electrolyte Performance

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Impact-resistant supercapacitor by hydrogel-infused lattice.

Shixiang Zhou¹, Yijing Zhao², Kaixi Zhang¹

¹Department of Materials Science and Engineering, National University of Singapore, Singapore, 117575, Singapore.

Nature Communications

|August 1, 2024

Summary

This study introduces a robust, self-healing supercapacitor for extreme environments. The device utilizes novel hydrogel electrolytes and 3D-printed electrodes, ensuring safety and functionality under harsh conditions.

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Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

Growing demand for safe energy storage in demanding applications.
Need for robust supercapacitors that maintain performance under stress.
Limitations of current energy storage devices in extreme environments.

Purpose of the Study:

To develop an impact-resistant and self-healable supercapacitor.
To enhance the safety and reliability of energy storage devices for harsh conditions.
To explore novel materials for advanced supercapacitor applications.

Main Methods:

Fabrication of supercapacitors using 3D-printed carbon-coated silicon oxycarbide current collectors.
Incorporation of self-healable polyvinyl alcohol hydrogel as electrolyte.
Coating electrodes with polyaniline for enhanced performance.
Testing under extreme conditions: impact, dynamic loading, and self-healing after damage.

Main Results:

Achieved high mechanical properties: compressive stress (70.61 MPa), Young's modulus (2.75 GPa), energy absorption (92.15 kJ/m³).
Supercapacitor electrode demonstrated high specific capacitance (585.51 mF/cm³) and energy density (97.63 μWh/cm³).
Maintained operational integrity after impact (0.3 J/cm³), dynamic loading (0-18.83 MPa), and self-healed electrolyte damage.

Conclusions:

The developed supercapacitor exhibits exceptional mechanical robustness and self-healing capabilities.
The device is suitable for reliable energy storage in extreme environments.
Presents a promising pathway for next-generation impact-resistant and self-healing energy storage solutions.