Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Electrochemical Behavior of Nanoporous Supercapacitors with Oligomeric Ionic Liquids

Journal Article · · Journal of Physical Chemistry. C
According to a recent study [Matsumoto, M. ; J. Am. Chem. Soc. 2017, 139, 16072-16075], an oligomeric ionic liquid (OIL) may exhibit a wide electrochemical window and an exceptionally high capacitance in electric double layer (EDL) transistors. However, little is known on applicability of OILs in EDL capacitors with porous electrodes. To understand the capacitive performance of OILs, here we investigate the charging behavior, EDL structure, and capacitance for different types of OILs using the classical density functional theory. In contrast to their application to field-effect transistors, the capacitive performance of OILs in nanoporous electrodes is sensitive to the charging potential. We report that although adoption of oligomeric cations shows little advantage for the electrical charging of a positive electrode, they enhance the energy storage density for negative electrodes.
Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); UT-Battelle LLC/ORNL, Oak Ridge, TN (Unted States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1566350
Alternate ID(s):
OSTI ID: 1761784
Journal Information:
Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 26 Vol. 122; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (48)

Design of Supercapacitor Electrodes Using Molecular Dynamics Simulations journal January 2018
Carbon/carbon supercapacitors journal March 2013
Density functional theory for differential capacitance of planar electric double layers in ionic liquids journal March 2011
The effect of dielectric permittivity on the capacitance of nanoporous electrodes journal September 2013
Mean-Field Theory of Electrical Double Layer In Ionic Liquids with Account of Short-Range Correlations journal January 2017
Lattice Model of an Ionic Liquid at an Electrified Interface journal June 2017
Charging Ultrananoporous Electrodes with Size-Asymmetric Ions Assisted by Apolar Solvent journal May 2016
A Generic Model for Electric Double Layers in Porous Electrodes journal April 2016
Capacitive Energy Extraction by Few-Layer Graphene Electrodes journal June 2017
Impurity Effects on Charging Mechanism and Energy Storage of Nanoporous Supercapacitors journal June 2017
Capacitive Energy Storage: Current and Future Challenges journal August 2015
Enhancing the Capacitive Performance of Electric Double-Layer Capacitors with Ionic Liquid Mixtures journal April 2016
Non-Faradaic Energy Storage by Room Temperature Ionic Liquids in Nanoporous Electrodes journal May 2015
Capacitive Energy Storage in Nanostructured Carbon–Electrolyte Systems journal June 2012
Ionic Liquids at Electrified Interfaces journal March 2014
Structure and Nanostructure in Ionic Liquids journal June 2015
Relation between the Ion Size and Pore Size for an Electric Double-Layer Capacitor journal March 2008
Exceptionally High Electric Double Layer Capacitances of Oligomeric Ionic Liquids journal November 2017
Density Functional Theory for Planar Electric Double Layers:  Closing the Gap between Simple and Polyelectrolytes journal April 2006
Application of Density Functional Theory To Study the Double Layer of an Electrolyte with an Explicit Dimer Model for the Solvent journal August 2012
Microstructure and Capacitance of the Electrical Double Layers at the Interface of Ionic Liquids and Planar Electrodes journal February 2009
Solvent Effect on the Pore-Size Dependence of an Organic Electrolyte Supercapacitor journal June 2012
Voltage Dependent Charge Storage Modes and Capacity in Subnanometer Pores journal June 2012
On the Atomistic Nature of Capacitance Enhancement Generated by Ionic Liquid Electrolyte Confined in Subnanometer Pores journal December 2012
Microscopic Insights into the Electrochemical Behavior of Nonaqueous Electrolytes in Electric Double-Layer Capacitors journal March 2013
Increasing Energy Storage in Electrochemical Capacitors with Ionic Liquid Electrolytes and Nanostructured Carbon Electrodes journal August 2013
Dynamic Charge Storage in Ionic Liquids-Filled Nanopores: Insight from a Computational Cyclic Voltammetry Study journal December 2014
Oscillation of Capacitance inside Nanopores journal December 2011
Highly confined ions store charge more efficiently in supercapacitors journal October 2013
Materials for electrochemical capacitors journal November 2008
On the molecular origin of supercapacitance in nanoporous carbon electrodes journal March 2012
Accelerating charging dynamics in subnanometre pores journal March 2014
Silica-grafted ionic liquids for revealing the respective charging behaviors of cations and anions in supercapacitors journal December 2017
Unusual effects of solvent polarity on capacitance for organic electrolytes in a nanoporous electrode journal January 2014
A review of electrolyte materials and compositions for electrochemical supercapacitors journal January 2015
Capacitance in carbon pores of 0.7 to 15 nm: a regular pattern journal January 2011
A superionic state in nano-porous double-layer capacitors: insights from Monte Carlo simulations journal January 2011
A classical density functional theory for interfacial layering of ionic liquids journal January 2011
Pore size distribution and capacitance in microporous carbons journal January 2012
A review of molecular modelling of electric double layer capacitors journal January 2014
Latest advances in supercapacitors: from new electrode materials to novel device designs journal January 2017
Phase behavior of the restricted primitive model and square-well fluids from Monte Carlo simulations in the grand canonical ensemble journal January 1999
Lattice model of ionic liquid confined by metal electrodes journal May 2018
Superionic state in double-layer capacitors with nanoporous electrodes journal December 2010
Can ionophobic nanopores enhance the energy storage capacity of electric-double-layer capacitors containing nonaqueous electrolytes? journal August 2016
Capacitance-Power-Hysteresis Trilemma in Nanoporous Supercapacitors journal June 2016
Anomalous Increase in Carbon Capacitance at Pore Sizes Less Than 1 Nanometer journal September 2006
Density-Functional Theory for Complex Fluids journal May 2007

Cited By (1)

Ionic liquid electrolytes in electric double layer capacitors journal July 2019