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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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Air-stable, high-performance, flexible microsupercapacitor with patterned ionogel electrolyte.

Daeil Kim¹, Geumbee Lee, Doyeon Kim

¹Department of Chemical and Biological Engineering, Korea University , Seoul 136-701, Republic of Korea.

ACS Applied Materials & Interfaces

|February 10, 2015

Summary

This summary is machine-generated.

Researchers developed air-stable, high-performance flexible microsupercapacitors (MSCs) using carbon nanotubes and ionogel electrolytes. These devices offer excellent cyclability, mechanical stability, and electrochemical performance for microelectronic energy storage.

Keywords:

air stable all-solid-state flexible microsupercapacitor ionogel electrolyte patterned electrolyte

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Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

Microsupercapacitors (MSCs) are crucial for portable electronics.
Developing air-stable and flexible energy storage solutions remains a challenge.
Existing MSCs often require encapsulation, limiting their application scope.

Purpose of the Study:

To fabricate air-stable, high-performance planar microsupercapacitors (MSCs) on flexible substrates.
To investigate the electrochemical and mechanical properties of the developed MSCs.
To explore methods for enhancing the areal capacitance of flexible MSCs.

Main Methods:

Fabrication of planar MSCs on poly(ethylene terephthalate) substrates.
Utilizing spray-coated multiwalled carbon nanotubes as electrodes.
Employing a patterned ionogel electrolyte composed of poly(ethylene glycol) diacrylate and 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide.
Testing cyclability, mechanical stability (bending), and electrochemical stability in air.

Main Results:

The flexible MSCs demonstrated excellent air stability, retaining 90% capacitance after 8 weeks.
High cyclability was observed, with ~80% capacitance retention after 30,000 cycles.
Exceptional mechanical stability was achieved, retaining 95% capacitance after 1000 bending cycles (3 mm diameter).
Vertical stacking of MSCs significantly increased areal capacitance.

Conclusions:

The developed flexible MSCs offer a promising, air-stable energy storage solution for micro/nanoelectronics.
The fabrication method allows for high performance without the need for encapsulation.
The potential for scalable energy storage is demonstrated through vertical stacking.