Charging Ultra-nanoporous Electrodes with Size-asymmetric Ions Assisted by Apolar Solvent
File(s)
Accepted version
Author(s)
Rochester, CC
Kondrat, S
Pruessner, G
Kornyshev, AA
Type
Journal Article
Abstract
We develop a statistical theory of charging quasi single-file pores with cations and anions of different sizes as well as solvent molecules or voids. This is done by mapping the charging onto a one-dimensional Blume–Emery–Griffith model with variable coupling constants. The results are supported by three-dimensional Monte Carlo simulations in which many limitations of the theory are lifted. We explore the different ways of enhancing the energy storage which depend on the competitive adsorption of ions and solvent molecules into pores, the degree of ionophilicity and the voltage regimes accessed. We identify new solvent-related charging mechanisms and show that the solvent can play the role of an “ionophobic agent”, effectively controlling the pore ionophobicity. In addition, we demonstrate that the ion-size asymmetry can significantly enhance the energy stored in a nanopore.
Date Issued
2016-04-05
Date Acceptance
2016-04-05
Citation
The Journal of Physical Chemistry C, 2016, 120 (29), pp.16042-16050
ISSN
1932-7447
Publisher
American Chemical Society
Start Page
16042
End Page
16050
Journal / Book Title
The Journal of Physical Chemistry C
Volume
120
Issue
29
Copyright Statement
This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://dx.doi.org/10.1021/acs.jpcc.5b12730
Subjects
Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Chemistry
Science & Technology - Other Topics
Materials Science
QUARTZ-CRYSTAL MICROBALANCE
DOUBLE-LAYER CAPACITOR
IN-SITU NMR
ENERGY-STORAGE
NANOPOROUS SUPERCAPACITORS
SUBNANOMETER PORES
CARBON ELECTRODES
ACTIVATED CARBONS
LIQUIDS
DYNAMICS
Physical Chemistry
09 Engineering
03 Chemical Sciences
10 Technology
Publication Status
Published