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Dr Tim Duignan
Dr

Tim Duignan

Email: 

Overview

Background

I completed my PhD at the Australian National University in 2015 working on modelling and simulation of ion specific effects working with Drew Parsons and Barry Ninham. I then completed postdoctoral research at the Pacific Northwest National Laboratory in Washington State working with Christopher Mundy and Gregory Schenter on quantum mechanical molecular dynamics simulation and modelling of electrolyte solution before coming to the University of Queensland to work on electrochemcial enery storage. I am currently working on my DECRA project on improving the prediction of electrolyte solution properties for improved electrochemical energy storage.

Availability

Dr Tim Duignan is:
Available for supervision

Qualifications

  • Bachelor of Science, Australian National University
  • Doctor of Philosophy, Australian National University

Research interests

  • Prediction of electrolyte solution properties

    I am interested in using both first principles molecular simulation and continuum solvent models in order to predict the fundamental properties of electrolyte solutions such as their free energies or chemical potentials. Understanding and predicting these properties are crucial for understanding and controlling a vast range of important practical applications where electrolyte solutions play a central role. This is because they determine many important properties such as solubilities, chemical equilibria, reaction rates and more. Unfortunately, we still have to rely almost entirely on equations with parameters fitted to experiment to determine these properties for the many practical applications where they play a role. This limits the predictive capability of our theories to cases where there has already been extensive experimental measurements. This is a huge problem as this experimental data is unreliable in many cases and non existent in many others. I am working to demonstrate that it is possible to use the information from first principles molecular simulation to build improved computationally cheap but accurate models of electrolyte solutions that can be rapidly applied to predict their many important properties.

  • Electrolyte solutions and surfactants at interfaces

    I am interested in predicting the properties of electrolyte and surfactants at the interfaces particularly the air-water interface. There are many unusual and important properties of electrolyte solutions at the air water interface such as the negative zeta potential, the Jones-Ray effect and bubble-bubble coalescence inhibtion that can be explained by careful modelling of the distribution of ions and charged surfactants at the air-water interface.

  • Electrochemical energy storage

    I am interested in using modelling to predict and understand and design potential strategies to improve the energy storage capability of various materials such as hard carbon, expanded graphite and activated carbon.

Works

Search Professor Tim Duignan’s works on UQ eSpace

59 works between 2011 and 2024

21 - 40 of 59 works

2021

Other Outputs

Liquid water simulation using hydrogen bond corrected SCAN and neural network potentials.

Duignan, Timothy (2021). Liquid water simulation using hydrogen bond corrected SCAN and neural network potentials.. doi: 10.26434/chemrxiv-2021-7jxpq

Liquid water simulation using hydrogen bond corrected SCAN and neural network potentials.

2021

Journal Article

Prediction of the osmotic/activity coefficients of alkali hydroxide electrolytes

Duignan, Timothy T. and Zhao, X. S. (2021). Prediction of the osmotic/activity coefficients of alkali hydroxide electrolytes. Industrial and Engineering Chemistry Research, 60 (41), 14948-14954. doi: 10.1021/acs.iecr.1c02950

Prediction of the osmotic/activity coefficients of alkali hydroxide electrolytes

2021

Journal Article

Lithium-ion transport behavior in thin-film graphite electrodes with SEI layers formed at different current densities

Rangom, Yverick, Duignan, Timothy T. and Zhao, X. S. (2021). Lithium-ion transport behavior in thin-film graphite electrodes with SEI layers formed at different current densities. ACS Applied Materials and Interfaces, 13 (36) acsami.1c09559, 42662-42669. doi: 10.1021/acsami.1c09559

Lithium-ion transport behavior in thin-film graphite electrodes with SEI layers formed at different current densities

2021

Journal Article

Toward a first-principles framework for predicting collective properties of electrolytes

Duignan, Timothy T., Kathmann, Shawn M., Schenter, Gregory K. and Mundy, Christopher J. (2021). Toward a first-principles framework for predicting collective properties of electrolytes. Accounts of Chemical Research, 54 (13) acs.accounts.1c00107, 2833-2843. doi: 10.1021/acs.accounts.1c00107

Toward a first-principles framework for predicting collective properties of electrolytes

2021

Journal Article

Stable α-MoO3 electrode with a widened electrochemical potential window for aqueous electrochemical capacitors

Elkholy, Ayman E., Duignan, Timothy T., Sun, Xiaoming and Zhao, Xiu Song (2021). Stable α-MoO3 electrode with a widened electrochemical potential window for aqueous electrochemical capacitors. ACS Applied Energy Materials, 4 (4) acsaem.0c02990, 3210-3220. doi: 10.1021/acsaem.0c02990

Stable α-MoO3 electrode with a widened electrochemical potential window for aqueous electrochemical capacitors

2021

Journal Article

From surface tension to molecular distribution: modeling surfactant adsorption at the air–water interface

Peng, Mengsu, Duignan, Timothy T., Nguyen, Cuong V. and Nguyen, Anh V. (2021). From surface tension to molecular distribution: modeling surfactant adsorption at the air–water interface. Langmuir, 37 (7) acs.langmuir.0c03162, 2237-2255. doi: 10.1021/acs.langmuir.0c03162

From surface tension to molecular distribution: modeling surfactant adsorption at the air–water interface

2021

Journal Article

Exploring the effect of interlayer distance of expanded graphite for sodium ion storage using first principles calculations

Rathnayake, R. M. N. M., Duignan, Timothy T., Searles, Debra J. and Zhao, X. S. (2021). Exploring the effect of interlayer distance of expanded graphite for sodium ion storage using first principles calculations. Physical Chemistry Chemical Physics, 23 (4), 3063-3070. doi: 10.1039/d0cp06134d

Exploring the effect of interlayer distance of expanded graphite for sodium ion storage using first principles calculations

2020

Journal Article

Quantifying the counterion-specific effect on surfactant adsorption using modeling, simulation, and experiments

Peng, Mengsu, Duignan, Timothy T. and Nguyen, Anh V. (2020). Quantifying the counterion-specific effect on surfactant adsorption using modeling, simulation, and experiments. Langmuir, 36 (43) acs.langmuir.0c02403, 13012-13022. doi: 10.1021/acs.langmuir.0c02403

Quantifying the counterion-specific effect on surfactant adsorption using modeling, simulation, and experiments

2020

Other Outputs

The Born Model Can Accurately Describe Electrostatic Ion Solvation.

Duignan, Timothy and Zhao, Xiu Song (2020). The Born Model Can Accurately Describe Electrostatic Ion Solvation.. doi: 10.26434/chemrxiv.12645596.v1

The Born Model Can Accurately Describe Electrostatic Ion Solvation.

2020

Journal Article

Method for accurately predicting solvation structure

Duignan, Timothy T., Mundy, Christopher J., Schenter, Gregory K. and Zhao, X. S. (2020). Method for accurately predicting solvation structure. Journal of Chemical Theory and Computation, 16 (8), 5401-5409. doi: 10.1021/acs.jctc.0c00300

Method for accurately predicting solvation structure

2020

Journal Article

Significant effect of surfactant adsorption layer thickness in equilibrium foam films

Peng, Mengsu, Duignan, Timothy T. and Nguyen, Anh V. (2020). Significant effect of surfactant adsorption layer thickness in equilibrium foam films. The Journal of Physical Chemistry B, 124 (25) acs.jpcb.0c02883, 5301-5310. doi: 10.1021/acs.jpcb.0c02883

Significant effect of surfactant adsorption layer thickness in equilibrium foam films

2020

Journal Article

Surface potential explained: a surfactant adsorption model incorporating realistic layer thickness

Peng, Mengsu, Duignan, Timothy T., Zhao, Xiu Song and Nguyen, Anh V. (2020). Surface potential explained: a surfactant adsorption model incorporating realistic layer thickness. The Journal of Physical Chemistry B, 124 (15) acs.jpcb.0c00278, 3195-3205. doi: 10.1021/acs.jpcb.0c00278

Surface potential explained: a surfactant adsorption model incorporating realistic layer thickness

2020

Journal Article

The Born model can accurately describe electrostatic ion solvation

Duignan, Timothy T. and Zhao, X. S. (2020). The Born model can accurately describe electrostatic ion solvation. Physical Chemistry Chemical Physics, 22 (43), 25126-25135. doi: 10.1039/d0cp04148c

The Born model can accurately describe electrostatic ion solvation

2020

Journal Article

Quantifying the hydration structure of sodium and potassium ions: taking additional steps on Jacob's Ladder

Duignan, Timothy T., Schenter, Gregory K., Fulton, John L., Huthwelker, Thomas, Balasubramanian, Mahalingam, Galib, Mirza, Baer, Marcel D., Wilhelm, Jan, Hutter, Jürg, Del Ben, Mauro, Zhao, X. S. and Mundy, Christopher J. (2020). Quantifying the hydration structure of sodium and potassium ions: taking additional steps on Jacob's Ladder. Physical Chemistry Chemical Physics, 22 (19), 10641-10652. doi: 10.1039/c9cp06161d

Quantifying the hydration structure of sodium and potassium ions: taking additional steps on Jacob's Ladder

2019

Journal Article

Microcrystalline cellulose-derived porous carbons with defective sites for electrochemical applications

Lu, Hao, Zhuang, Linzhou, Gaddam, Rohit Ranganathan, Sun, Xiaoming, Xiao, Changlong, Duignan, Timothy, Zhu, Zhonghua and Zhao, X. S. (2019). Microcrystalline cellulose-derived porous carbons with defective sites for electrochemical applications. Journal of Materials Chemistry A, 7 (39), 22579-22587. doi: 10.1039/c9ta05891e

Microcrystalline cellulose-derived porous carbons with defective sites for electrochemical applications

2019

Journal Article

Improvement of hard carbon electrode performance by manipulating SEI formation at high charging rates

Rangom, Yverick, Gaddam, Rohit R., Duignan, Timothy T. and Zhao, X. S. (2019). Improvement of hard carbon electrode performance by manipulating SEI formation at high charging rates. ACS Applied Materials and Interfaces, 11 (38) acsami.9b07449, 34796-34804. doi: 10.1021/acsami.9b07449

Improvement of hard carbon electrode performance by manipulating SEI formation at high charging rates

2019

Conference Publication

Impurities limit the capacitance of carbon-based supercapacitors

Duignan, Timothy and Zhao, X. S. (2019). Impurities limit the capacitance of carbon-based supercapacitors. ACS Fall National Meeting and Exposition, San Diego, CA, United States, 25-29 August 2019. Washington, DC, United States: American Chemical Society .

Impurities limit the capacitance of carbon-based supercapacitors

2019

Conference Publication

Using quantum simulation of ion hydration to predict electrolyte solution properties

Duignan, Timothy, Baer, Marcel, Mundy, Christopher, Schenter, Gregory and Zhao, X. S. (2019). Using quantum simulation of ion hydration to predict electrolyte solution properties. Fall National Meeting and Exposition of the American-Chemical-Society (ACS), San Diego, CA, United States, 25-29 August 2019. Washington, DC, United States: American Chemical Society.

Using quantum simulation of ion hydration to predict electrolyte solution properties

2019

Journal Article

A flexible graphene–carbon fiber composite electrode with high surface area-normalized capacitance

Sun, Xiaoming, Lu, Hao, Rufford, Thomas E., Gaddam, Rohit Ranganathan, Duignan, Timothy T., Fan, Xin and Zhao, X. S. (2019). A flexible graphene–carbon fiber composite electrode with high surface area-normalized capacitance. Sustainable Energy & Fuels, 3 (7), 1827-1832. doi: 10.1039/c9se00099b

A flexible graphene–carbon fiber composite electrode with high surface area-normalized capacitance

2019

Journal Article

Impurities limit the capacitance of carbon-based supercapacitors

Duignan, Timothy T. and Zhao, Xiu Song (2019). Impurities limit the capacitance of carbon-based supercapacitors. The Journal of Physical Chemistry C, 123 (7), 4085-4093. doi: 10.1021/acs.jpcc.8b12031

Impurities limit the capacitance of carbon-based supercapacitors

Funding

Past funding

  • 2020 - 2022
    Prediction of new electrolytes for improved electrical energy storage.
    ARC Discovery Early Career Researcher Award
    Open grant
  • 2019
    Developing improved supercapacitors by understanding the role of hydrocarbon impurities.
    UQ Early Career Researcher
    Open grant

Supervision

Availability

Dr Tim Duignan is:
Available for supervision

Before you email them, read our advice on how to contact a supervisor.

Available projects

  • Prediction of electrolyte solution properties for improved energy storage

    This project aims to predict the properties of electrolyte solutions in order to develop improved energy storage devices. Electrolyte solutions play a central and fundamental role in a huge range of important systems and applications. They carry the electrical currents that make life possible, they control the chemical properties of the ocean such as its acidity and ability to absorb carbon dioxide. They also carry the electrical current between the positive and negative terminals of a battery. Optimising the electrolyte is, therefore, crucial to improving the stability, charging rate and lifetime of batteries. To do this we need accurate predictive models of the properties of electrolyte solutions. Unfortunately, we still cannot predict even some of the most basic properties of electrolytes solutions.

    In this project, we will use state of the art computational techniques to directly simulate electrolyte solutions and calculate their properties. We will then use these simulations to improve approximate models that can rapidly predict the properties of many different electrolyte solutions. These models will then be used to identify suitable candidate electrolytes for use in real energy storage devices. By joining this project, the successful candidate will have an excellent opportunity to develop skills in programming, computational chemistry and energy storage technology.

Supervision history

Current supervision

  • Doctor Philosophy

    Prediction of new electrolytes for improved electrical energy storage.

    Principal Advisor

    Other advisors: Professor Debra Bernhardt

  • Doctor Philosophy

    Effectively predicting the properties of aqueous electrolyte solutions

    Principal Advisor

    Other advisors: Professor Debra Bernhardt

Completed supervision

Media

Enquiries

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communications@uq.edu.au