Supercapacitors, in general, have a few comparative advantages over many battery technologies. These include: faster charge and discharge rates, higher power density, longer cycle life, and a wider operating temperature. Microsupercapacitors (MSCs) containing interdigitated laser-induced graphene (LIG) electrodes have recently attracted attention as potential energy storage units in miniaturized devices. The simple and reproducible fabrication method involves “laser scribing” the desired electrode architectures on commercially available, flexible polyimide sheets under ambient conditions using a computer-controlled CO2 laser cutter system. Selected regions of the polyimide sheet are converted to graphene, which serves as both an electrode and current collector. In this work, a series of electrolytes were synthesized, incorporated in LIG MSCs, and electrically tested. Two types of electrolytes were prepared: poly(vinyl alcohol)-based aqueous gel electrolytes incorporating either H2SO4 or LiCl, and novel imidazolium-based ionic liquids containing halides or bis(trifluoromethylsulfonyl)amide. The ionic liquids were all synthesized using well-established, microwave-assisted methods. For electrical testing, a simple RC circuit, incorporating a signal generator was constructed. A square waveform with an amplitude of 0.50 V was produced across the LIG MSCs. Typical charge-discharge behavior was observed for all the samples. MSCs containing ionic liquid electrolytes could charge to a higher voltage (up to 0.33 V) than the aqueous gel electrolytes.

Development of a laser-induced graphene microsupercapacitor at a community college

Macromolecular Chemistry: The Second Century

[Author Benefits](https://scimeetings.acs.org/?utm_source=pubs_content_marketing&utm_medium=website&utm_campaign=0320_MCF_NPI_Launch_Spring_Homepage&ref=pubs_content_marketing)

[How to use SciMeetings](https://storage.googleapis.com/dl.morressier.com/acs/SciMeetings-ACSSpring2020-HowToGuide_M3020-Final.pdf)

[Frequently Asked Questions](https://storage.googleapis.com/dl.morressier.com/acs/SciMtng_ACSNMSp2020_FAQ_M3120_Final.pdf)

ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.