TY - JOUR
T1 - Tailoring the Porosity and Microstructure of Printed Graphene Electrodes via Polymer Phase Inversion
AU - Secor, Ethan B.
AU - Dos Santos, Manuel H.
AU - Wallace, Shay G.
AU - Bradshaw, Nathan P.
AU - Hersam, Mark C.
N1 - Funding Information:
This work was supported by the Air Force Research Laboratory under agreement number FA8650-15-2-5518. E.B.S. was further supported by the Department of Defense (DoD) through the National Defense Science and Engineering Graduate (NDSEG) Fellowship Program, the Ryan Fellowship administered through the Northwestern University International Institute for Nanotechnology, and the Cabell Terminal Year Fellowship. N.P.B. also acknowledges a National Science Foundation (NSF) Graduate Research Fellowship. This work made use of the EPIC and Keck-II facilities within the Northwestern University NUANCE Center, which has received support from the NSF Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (ECCS-1542205), the NSF MRSEC program (DMR-1720139), the International Institute for Nanotechnology (IIN), the Keck Foundation, and the State of Illinois. Rheometry was performed in the Materials Characterization and Imaging facility at Northwestern University, which receives support from the NSF MRSEC (DMR-1720139). The U.S. Government is authorized to reproduce and distribute reprints for Governmental purposes notwithstanding any copyright notation thereon. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the sponsors.
Funding Information:
This work was supported by the Air Force Research Laboratory under agreement number FA8650-15-2-5518. E.B.S. was further supported by the Department of Defense (DoD) through the National Defense Science and Engineering Graduate (NDSEG) Fellowship Program, the Ryan Fellowship administered through the Northwestern University International Institute for Nanotechnology, and the Cabell Terminal Year Fellowship. N.P.B. also acknowledges a National Science Foundation (NSF) Graduate Research Fellowship. This work made use of the EPIC and Keck-II facilities within the Northwestern University NUANCE Center, which has received support from the NSF Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (ECCS-1542205), the NSF MRSEC program (DMR-1720139), the International Institute for Nanotechnology (IIN), the Keck Foundation and the State of Illinois. Rheometry was performed in the Materials Characterization and Imaging facility at Northwestern University which receives support from the NSF MRSEC (DMR-1720139).
PY - 2018/6/28
Y1 - 2018/6/28
N2 - 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.
AB - 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.
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U2 - 10.1021/acs.jpcc.8b00580
DO - 10.1021/acs.jpcc.8b00580
M3 - Article
AN - SCOPUS:85049414906
VL - 122
SP - 13745
EP - 13750
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 25
ER -