
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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 .
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.
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
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
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
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Doctor Philosophy
Effectively predicting the properties of aqueous electrolyte solutions
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: 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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