Tailoring the Porosity and Microstructure of Printed Graphene Electrodes via Polymer Phase Inversion

Ethan B. Secor; Manuel H. Dos Santos; Shay G. Wallace; Nathan P. Bradshaw; Mark C. Hersam

doi:10.1021/acs.jpcc.8b00580

Tailoring the Porosity and Microstructure of Printed Graphene Electrodes via Polymer Phase Inversion

Ethan B. Secor, Manuel H. Dos Santos, Shay G. Wallace, Nathan P. Bradshaw, Mark C. Hersam

Northwestern University

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Phase inversion is demonstrated as an effective method for engineering the microstructure of graphene films by exploiting the well-defined solubility characteristics of polymer dispersants. Drying of a tailored phase inversion ink containing a nonvolatile nonsolvent leads to gelation and subsequent pore formation, providing a promising strategy to tailor the porosity of the resulting graphene films. Graphene films with tunable porosity and electrical conductivity ranging from ∼1000 to ∼22 000 S/m are fabricated by this method. Moreover, this dry phase inversion technique is compatible with conventional coating and printing methods, allowing direct ink writing of porous graphene microsupercapacitor electrodes for energy storage applications. Overall, this method provides a straightforward and versatile strategy for engineering the microstructure of solution-processed nanomaterials.

Original language	English
Pages (from-to)	13745-13750
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	122
Issue number	25
DOIs	https://doi.org/10.1021/acs.jpcc.8b00580
Publication status	Published - Jun 28 2018

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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AU - Secor, Ethan B.

AU - Dos Santos, Manuel H.

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AU - Bradshaw, Nathan P.

AU - Hersam, Mark C.

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