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
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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.
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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.
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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
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.
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
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
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
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
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
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
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.
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
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.
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
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
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
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
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
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
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
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
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
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
Funding
Past funding
Supervision
Availability
- Dr Tim Duignan is:
- Available for supervision
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Available projects
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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
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Doctor Philosophy
Prediction of new electrolytes for improved electrical energy storage.
Principal Advisor
Other advisors: Professor Debra Bernhardt
Completed supervision
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2023
Doctor Philosophy
Molybdenum Oxide Based Electrodes for Aqueous Electrochemical Energy Storage
Principal Advisor
Other advisors: Associate Professor Ruth Knibbe
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2024
Doctor Philosophy
Understanding interaction between ionomers, particles and solvents in catalyst ink formulation for CO2 electrolysis to multicarbon products
Associate Advisor
Other advisors: Associate Professor Tom Rufford
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2022
Doctor Philosophy
Computational study of graphite-based electrode materials for sodium-ion batteries
Associate Advisor
Other advisors: Professor Debra Bernhardt
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2021
Doctor Philosophy
Manipulating Interfaces for Enabling Fast Charging of Alkali-ion Batteries
Associate Advisor
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2021
Doctor Philosophy
Adsorption of soluble surfactants at the air-water interface
Associate Advisor
Other advisors: Professor Debra Bernhardt, Professor Anh Nguyen
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2019
Doctor Philosophy
Cellulose-derived porous carbon electrodes for electrochemical capacitors
Associate Advisor
Media
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