Charge Storage in Graphene Oxide: Impact of the Cation on Ion Permeability and Interfacial Capacitance

The charge storage and membrane applications of graphene oxide (GO) materials are dictated by its intrinsic material properties. Structure–function relationships correlating periodic parameters, such as the hydrated ion radius and ion–GO interactions, are currently lacking yet are needed to provide...

Full description

Saved in:
Bibliographic Details
Published in:Analytical chemistry (Washington) 2020-08, Vol.92 (15), p.10300-10307
Main Authors: Paschoalino, Waldemir J, Payne, Nicholas A, Pessanha, Tatiana M, Gateman, Samantha M, Kubota, Lauro T, Mauzeroll, Janine
Format: Article
Language:English
Subjects:
Analytical chemistry
Capacitance
Charge transport
Chemistry
Conductance
Electrostatic properties
Graphene
Interlayers
Ion transport
Ionic mobility
Material properties
Membrane permeability
Permeability
Structure-function relationships
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The charge storage and membrane applications of graphene oxide (GO) materials are dictated by its intrinsic material properties. Structure–function relationships correlating periodic parameters, such as the hydrated ion radius and ion–GO interactions, are currently lacking yet are needed to provide insight on the charge storage and ion transport mechanism. We report the use of scanning ion conductance microscopy to measure the ion permeability of GO films and evaluate its relationship with the measured capacitance. We demonstrate that species (namely K+) with strong electrostatic interactions with the oxygen functionalities of GO provide the benefit of higher capacitance but suffer from inhibited ion mobility due to constriction of the GO interlayer spacing
ISSN:0003-2700
1520-6882
DOI:10.1021/acs.analchem.0c00218