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Scalable Fabrication and Integration of Graphene Micro-Supercapacitors through Full Inkjet Printing.

08:00 EDT 6th July 2017 | BioPortfolio

Summary of "Scalable Fabrication and Integration of Graphene Micro-Supercapacitors through Full Inkjet Printing."

A simple full-inkjet-printing technique is developed for the scalable fabrication of graphene-based micro-supercapacitors (MSCs) on various substrates. High-performance graphene inks are formulated by integrating the electrochemically exfoliated graphene with a solvent exchange technique to reliably print graphene interdigitated electrodes with tunable geometry and thickness. Along with the printed polyelectrolyte, poly(4-styrenesulfonic acid), the fully printed graphene-based MSCs attain the highest areal capacitance of ~0.7 mF/cm2, substantially advancing the state-of-art of all-solid-state MSCs with printed graphene electrodes. The full printing solution enables scalable fabrication of MSCs and effective connection of them in parallel and/or in series at various scales. Remarkably, more than 100 devices have been connected to form large-scale MSC arrays as power banks on both silicon wafers and Kapton. Without any extra protection or encapsulation, the MSC arrays can be reliably charged up to 12 volts and retain the performance even 8 months after fabrication.

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This article was published in the following journal.

Name: ACS nano
ISSN: 1936-086X
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