skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Hunting ionic liquids with large electrochemical potential windows

Journal Article · · AIChE Journal
DOI:https://doi.org/10.1002/aic.16467· OSTI ID:1483705
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]
  1. State Key Laboratory of Chemical Engineering, School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai 200237 China
  2. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering East China University of Science &, Technology Shanghai 200237 China
  3. Dept. of Chemical and Environmental Engineering University of California Riverside CA 92521

Ionic liquids (ILs) with large electrochemical potential windows (EPWs) are ideally suited to improve the energy and power density of electrical devices for energy storage. However, guidelines are scarcely available for the selection or systematic screening of ILs for practical applications. Here, we present theoretical predictions for the EPW of thousands of cation‐anion pairs based on a long‐range corrected hybrid density functional theory. The cathodic and anodic potential limits were estimated from the highest occupied molecular orbital and lowest unoccupied molecular orbital energies of individual cations and anions. The approximate method predicts EPWs in reasonable agreement with existing experimental data for several commonly used ionic systems and can be used as a screening tool for a large library of ILs. Five most stable anions, with the cathode stability in the order of B[CN] 4  > PF 6  > BF 4  > BOB>NTf 2 , have been identified. These anions provide the largest EPWs when they are paired with conventional organic cations. The cation stability is reduced upon elongation of the alkyl chain length or branching of the molecular backbone. © 2018 American Institute of Chemical Engineers AIChE J , 65: 804–810, 2019

Sponsoring Organization:
USDOE
OSTI ID:
1483705
Journal Information:
AIChE Journal, Journal Name: AIChE Journal Vol. 65 Journal Issue: 2; ISSN 0001-1541
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 62 works
Citation information provided by
Web of Science

References (38)

Computational Insights into Materials and Interfaces for Capacitive Energy Storage journal April 2017
Towards understanding the structure and capacitance of electrical double layer in ionic liquids journal October 2008
Ionic Liquids as Electrolytes for Electrochemical Double-Layer Capacitors: Structures that Optimize Specific Energy journal January 2016
Formulation of Ionic-Liquid Electrolyte To Expand the Voltage Window of Supercapacitors journal March 2015
Ionic Liquids for Clean Technology journal April 1997
Design of Supercapacitor Electrodes Using Molecular Dynamics Simulations journal January 2018
Capacitive Energy Storage in Nanostructured Carbon–Electrolyte Systems journal June 2012
Quantum Effects on the Capacitance of Graphene-Based Electrodes journal September 2015
Boron Supercapacitors journal November 2016
Recent Advances in Continuum Modeling of Interfacial and Transport Phenomena in Electric Double Layer Capacitors journal January 2015
Silica-grafted ionic liquids for revealing the respective charging behaviors of cations and anions in supercapacitors journal December 2017
Controlled Electrochemical Charge Injection to Maximize the Energy Density of Supercapacitors journal February 2013
Electrolyte design strategies and research progress for room-temperature sodium-ion batteries journal January 2017
A Generic Model for Electric Double Layers in Porous Electrodes journal April 2016
Refined Method for Predicting Electrochemical Windows of Ionic Liquids and Experimental Validation Studies journal May 2014
Investigating the electrochemical windows of ionic liquids journal January 2013
An Improved Method for Quantitatively Predicting the Electrochemical Stabilities of Organic Liquid Electrolytes Using Ab Initio Calculations journal December 2013
Voltammetry in Room Temperature Ionic Liquids: Comparisons and Contrasts with Conventional Electrochemical Solvents. journal February 2010
The Coupling between Stability and Ion Pair Formation in Magnesium Electrolytes from First-Principles Quantum Mechanics and Classical Molecular Dynamics journal February 2015
Ionic Liquid Mixture Expands the Potential Window and Capacitance of a Supercapacitor in Tandem journal July 2018
Chemical and Radiation Stability of Ionic Liquids: A Computational Screening Study journal November 2016
Ionization Potential, Electron Affinity, Electronegativity, Hardness, and Electron Excitation Energy:  Molecular Properties from Density Functional Theory Orbital Energies journal May 2003
A review of electrolyte materials and compositions for electrochemical supercapacitors journal January 2015
Electronic Structure book January 2004
Electrochemical Windows of Room-Temperature Ionic Liquids from Molecular Dynamics and Density Functional Theory Calculations journal June 2011
Capacitive Energy Extraction by Few-Layer Graphene Electrodes journal June 2017
Enhancing the Capacitive Performance of Electric Double-Layer Capacitors with Ionic Liquid Mixtures journal April 2016
Electrochemical Stability of Ionic Liquids: General Influences and Degradation Mechanisms journal August 2014
Binary Ionic Liquid Mixtures for Supercapacitor Applications journal August 2014
Accurate Method for Obtaining Band Gaps in Conducting Polymers Using a DFT/Hybrid Approach journal April 1998
Surface chemistry of carbon electrodes in 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid – an in situ infrared study journal April 2014
Intermolecular Forces in an Ionic Liquid ([Mmim][Cl]) versus Those in a Typical Salt (NaCl) journal April 2008
On the thickness of the double layer in ionic liquids journal January 2018
From Oligomers to Polymer:  Convergence in the HOMO−LUMO Gaps of Conjugated Oligomers journal November 2006
Latest advances in supercapacitors: from new electrode materials to novel device designs journal January 2017
Double-Layer in Ionic Liquids:  Paradigm Change? journal May 2007
Electrochemical determination of the ionization potential and electron affinity of poly(9,9-dioctylfluorene) journal October 1998
Long-range corrected hybrid density functionals with damped atom–atom dispersion corrections journal January 2008

Similar Records

Hunting ionic liquids with large electrochemical potential windows
Journal Article · Wed Nov 28 00:00:00 EST 2018 · AIChE Journal · OSTI ID:1483705

Metal electrodeposition and electron transfer studies of uranium compounds in room temperature ionic liquids.
Conference · Thu Jan 01 00:00:00 EST 2004 · OSTI ID:1483705

Analysis of the Frequency and Diversity of 1,3-Dialkylimidazolium Ionic Liquids Appearing in the Literature
Journal Article · Fri Aug 17 00:00:00 EDT 2018 · Industrial and Engineering Chemistry Research · OSTI ID:1483705

Related Subjects