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Dr Tim Duignan
Dr

Tim Duignan

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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

53 works between 2011 and 2024

1 - 20 of 53 works

2024

Conference Publication

Catalyst ink effects in the fabrication of electrodes for CO2 electrolysis

Rufford, Thomas E., Idros, Mohammed Nazmi, Wu, Yuming, Sahu, Aloka Kumar, Li, Mengran, Duignan, Tim and Wang, Geoff (2024). Catalyst ink effects in the fabrication of electrodes for CO2 electrolysis. International Conference on Advanced Materials for Energy, Environment and Health 2024, Adelaide, SA, Australia, 24-27 September 2024. Adelaide, SA, Australia: The University of Adelaide.

Catalyst ink effects in the fabrication of electrodes for CO2 electrolysis

2024

Journal Article

A Method for Efficiently Predicting the Radial Distribution Function and Osmotic Coefficients of Aqueous Electrolyte Solutions

Zhang, Junji, Searles, Debra J. and Duignan, Timothy (2024). A Method for Efficiently Predicting the Radial Distribution Function and Osmotic Coefficients of Aqueous Electrolyte Solutions. Journal of Chemical Theory and Computation, 20 (15), 6957-6970. doi: 10.1021/acs.jctc.4c00363

A Method for Efficiently Predicting the Radial Distribution Function and Osmotic Coefficients of Aqueous Electrolyte Solutions

2024

Journal Article

The potential of neural network potentials

Duignan, Timothy T. (2024). The potential of neural network potentials. ACS Physical Chemistry Au, 4 (3), 232-241. doi: 10.1021/acsphyschemau.4c00004

The potential of neural network potentials

2024

Journal Article

Understanding the electrochemical extraction of lithium from ultradilute solutions

Sun, Kaige, Tebyetekerwa, Mike, Zeng, Xiangkang, Wang, Zhuyuan, Duignan, Timothy T. and Zhang, Xiwang (2024). Understanding the electrochemical extraction of lithium from ultradilute solutions. Environmental Science & Technology, 58 (8), 3997-4007. doi: 10.1021/acs.est.3c09111

Understanding the electrochemical extraction of lithium from ultradilute solutions

2023

Journal Article

Effect of dispersing solvents for an ionomer on the performance of copper catalyst layers for CO2 electrolysis to multicarbon products

Idros, Mohamed Nazmi, Wu, Yuming, Duignan, Timothy, Li, Mengran, Cartmill, Hayden, Maglaya, Irving, Burdyny, Thomas, Wang, Geoff and Rufford, Thomas E. (2023). Effect of dispersing solvents for an ionomer on the performance of copper catalyst layers for CO2 electrolysis to multicarbon products. ACS Applied Materials and Interfaces, 15 (45), 52461-52472. doi: 10.1021/acsami.3c11096

Effect of dispersing solvents for an ionomer on the performance of copper catalyst layers for CO2 electrolysis to multicarbon products

2023

Journal Article

High-throughput aqueous electrolyte structure prediction using IonSolvR and equivariant graph neural network potentials

Baker, Sophie, Pagotto, Joshua, Duignan, Timothy T. and Page, Alister J. (2023). High-throughput aqueous electrolyte structure prediction using IonSolvR and equivariant graph neural network potentials. The Journal of Physical Chemistry Letters, 14 (42), 9508-9515. doi: 10.1021/acs.jpclett.3c01783

High-throughput aqueous electrolyte structure prediction using IonSolvR and equivariant graph neural network potentials

2023

Journal Article

Effect of fluoro and hydroxy analogies of diglyme on sodium-ion storage in graphite: a computational study

Rathnayake, R. M. N. M., Searles, Debra J., Duignan, Timothy T. and Zhao, X. S. (2023). Effect of fluoro and hydroxy analogies of diglyme on sodium-ion storage in graphite: a computational study. Physical Chemistry Chemical Physics, 25 (28), 19106-19115. doi: 10.1039/d3cp00903c

Effect of fluoro and hydroxy analogies of diglyme on sodium-ion storage in graphite: a computational study

2023

Conference Publication

Elucidating the effects of solvent-ionomer interactions on copper catalyst layers for CO2 electrolysis to multicarbon products

Idros, Mohamed Nazmi, Duignan, Timothy, Li, Mengran, Rufford, Thomas E., Wang, Geoff and Wu, Yuming (2023). Elucidating the effects of solvent-ionomer interactions on copper catalyst layers for CO2 electrolysis to multicarbon products. 35th Topical Meeting of the International Society of Electrochemistry, Gold Coast, QLD, Australia, 7-10 May 2023.

Elucidating the effects of solvent-ionomer interactions on copper catalyst layers for CO2 electrolysis to multicarbon products

2023

Journal Article

Improving the electrochemical performance of α-MoO3 electrode using aluminium trifluoromethanesulfonate water-in-salt electrolyte

Elkholy, Ayman E., Duignan, Timothy T., Knibbe, Ruth and Song Zhao, Xiu (2023). Improving the electrochemical performance of α-MoO3 electrode using aluminium trifluoromethanesulfonate water-in-salt electrolyte. Journal of Energy Chemistry, 78, 123-134. doi: 10.1016/j.jechem.2022.11.015

Improving the electrochemical performance of α-MoO3 electrode using aluminium trifluoromethanesulfonate water-in-salt electrolyte

2023

Journal Article

Elucidating the effects of solvent-ionomer interactions on copper catalyst layers for CO2 electrolysis to multicarbon products

Idros, Mohamed Nazmi, Wu, Yuming, Duignan, Timothy T., Li, Mengran, Cartmill, Hayden, Maglaya, Irving, Burdyny, Thomas, Wang, Geoff GX and Rufford, Thomas E. (2023). Elucidating the effects of solvent-ionomer interactions on copper catalyst layers for CO2 electrolysis to multicarbon products.

Elucidating the effects of solvent-ionomer interactions on copper catalyst layers for CO2 electrolysis to multicarbon products

2023

Book Chapter

Cycling Stability of Sodium-Ion Batteries in Analogy to Lithium-Ion Batteries

Rangom, Yverick, Duignan, Timothy T., Fan, Xin and Zhao, X.S. (George) (2023). Cycling Stability of Sodium-Ion Batteries in Analogy to Lithium-Ion Batteries. Handbook of Sodium-Ion Batteries. (pp. 389-466) New York, NY United States: Jenny Stanford Publishing. doi: 10.1201/9781003308744-9

Cycling Stability of Sodium-Ion Batteries in Analogy to Lithium-Ion Batteries

2022

Journal Article

Electrosynthesis of polypyrrole-reinforced helical α-MoO3 microribbons for high-energy aqueous Al3+-ion pseudocapacitors

Elkholy, Ayman E., Duignan, Timothy T., Knibbe, Ruth and Zhao, Xiu Song (2022). Electrosynthesis of polypyrrole-reinforced helical α-MoO3 microribbons for high-energy aqueous Al3+-ion pseudocapacitors. Electrochimica Acta, 429 141050, 1-12. doi: 10.1016/j.electacta.2022.141050

Electrosynthesis of polypyrrole-reinforced helical α-MoO3 microribbons for high-energy aqueous Al3+-ion pseudocapacitors

2022

Journal Article

Rechargeable dual‐carbon batteries: a sustainable battery technology

Tebyetekerwa, Mike, Duignan, Timothy T., Xu, Zhen and Zhao, Xiu Song (2022). Rechargeable dual‐carbon batteries: a sustainable battery technology. Advanced Energy Materials, 12 (44) 2202450, 1-34. doi: 10.1002/aenm.202202450

Rechargeable dual‐carbon batteries: a sustainable battery technology

2022

Journal Article

Charge storage behaviour of α‐MoO3 in aqueous electrolytes – effect of charge density of electrolyte cations

Elkholy, Ayman E., Duignan, Timothy T., Hussain, Tanveer, Knibbe, Ruth and Zhao, Xiu Song (2022). Charge storage behaviour of α‐MoO3 in aqueous electrolytes – effect of charge density of electrolyte cations. ChemElectroChem, 9 (3) e202101449. doi: 10.1002/celc.202101449

Charge storage behaviour of α‐MoO3 in aqueous electrolytes – effect of charge density of electrolyte cations

2022

Journal Article

Salting-up of surfactants at the surface of saline water as detected by tensiometry and SFG and supported by molecular dynamics simulation

Nguyen, Cuong V., Peng, Mengsu, Duignan, Timothy T. and Nguyen, Anh V. (2022). Salting-up of surfactants at the surface of saline water as detected by tensiometry and SFG and supported by molecular dynamics simulation. The Journal of Physical Chemistry B, 126 (5) acs.jpcb.1c08114, 1063-1075. doi: 10.1021/acs.jpcb.1c08114

Salting-up of surfactants at the surface of saline water as detected by tensiometry and SFG and supported by molecular dynamics simulation

2022

Journal Article

Towards predictive design of electrolyte solutions by accelerating ab initio simulation with neural networks

Zhang, Junji, Pagotto, Joshua and Duignan, Timothy T. (2022). Towards predictive design of electrolyte solutions by accelerating ab initio simulation with neural networks. Journal of Materials Chemistry A, 10 (37), 19560-19571. doi: 10.1039/d2ta02610d

Towards predictive design of electrolyte solutions by accelerating ab initio simulation with neural networks

2021

Journal Article

Charge storage behavior of carbon nanoparticles toward alkali metal ions at fast-charging rates

Rangom, Yverick, Gaddam, Rohit R., Duignan, Timothy T., Wu, Yilan, Hu, Zhe and Zhao, Xiu Song (2021). Charge storage behavior of carbon nanoparticles toward alkali metal ions at fast-charging rates. ACS Applied Energy Materials, 4 (11) acsaem.1c02863, 13272-13278. doi: 10.1021/acsaem.1c02863

Charge storage behavior of carbon nanoparticles toward alkali metal ions at fast-charging rates

2021

Journal Article

The surface potential explains ion specific bubble coalescence inhibition

Duignan, Timothy T. (2021). The surface potential explains ion specific bubble coalescence inhibition. Journal of Colloid and Interface Science, 600, 338-343. doi: 10.1016/j.jcis.2021.04.144

The surface potential explains ion specific bubble coalescence inhibition

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

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

Completed supervision

Media

Enquiries

For media enquiries about Dr Tim Duignan's areas of expertise, story ideas and help finding experts, contact our Media team:

communications@uq.edu.au