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Charge Storage in Graphene Oxide: The Impact of the Cation on Ion Permeability and Interfacial Capacitance Studied by Scanning Ion Conductance Microscopy
Monday, March 08, 2021: 3:30 PM - 4:05 PM
Speaker(s)
Description
The charge storage and membrane applications of graphene oxide materials are dictated by its intrinsic material proper-ties. Structure-function relationships correlating periodic parameters, such as hydrated ion radius and ion-graphene oxide interactions, are currently lacking yet needed to provide insight on the charge storage and ion transport mechanism. We will discuss the use of scanning ion conductance microscopy to measure the ion permeability of graphene oxide films and evaluate its relationship with the measured capacitance. We demonstrate that species (namely K+) with strong electrostatic interactions with the oxygen functionalities of graphene oxide, provide the benefit of higher capacitance but suffer from inhibited ion mobility due to constriction of the graphene oxide interlayer spacing
Additional Info
Keywords: Please select up to 4 keywords ONLY:
Materials Characterization,Nanoscience,Surface Analysis
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