ORCID Profile
0000-0002-9931-7520
Current Organisation
University of Queensland
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In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Electrochemistry | Functional materials | Electrochemical energy storage and conversion | Chemical engineering not elsewhere classified | Materials engineering | Catalysis and mechanisms of reactions | Macromolecular and Materials Chemistry | Physical Chemistry (Incl. Structural) | Chemical Characterisation of Materials | Electrochemistry | Nanotechnology | Nanoscale Characterisation | Nanofabrication growth and self assembly | Composite and hybrid materials | Physical chemistry | Cellular Interactions (incl. Adhesion, Matrix, Cell Wall) | Nanoscale characterisation | Nanomaterials | Chemical engineering | Functional Materials | Physical Chemistry not elsewhere classified | Nanotechnology | Metals and Alloy Materials | Separation technologies | Surfaces and Structural Properties of Condensed Matter
Neurodegenerative Disorders Related to Ageing | Expanding Knowledge in Technology | Energy Storage (excl. Hydrogen) | Basic Iron and Steel Products | Expanding Knowledge in the Physical Sciences | Scientific Instruments |
Publisher: American Chemical Society (ACS)
Date: 13-01-2021
Publisher: Wiley
Date: 14-11-2018
Abstract: To fulfil the potential of Li-S batteries (LSBs) with high energy density and low cost, multiple challenges need to be addressed simultaneously. Most research in LSBs has been focused on the sulfur cathode design, although the performance is also known to be sensitive to other parameters such as binder, current collector, separator, lithium anode, and electrolyte. Here, an integrated LSB system based on the understanding of the different roles of binder, current collector, and separator is developed. By using the cross-linked carboxymethyl cellulose-citric acid (CMC-CA) binder, Toray carbon paper current collector, and reduced graphene oxide (rGO) coated separator, LSBs achieve a high capacity of 960 mAh g
Publisher: Elsevier BV
Date: 2009
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8TA12066H
Abstract: Different classes of coating materials with their functional groups and mechanism of interaction with PSs.
Publisher: Elsevier BV
Date: 06-2022
Publisher: Elsevier BV
Date: 09-2010
Publisher: Elsevier BV
Date: 10-2013
Publisher: Elsevier BV
Date: 03-2019
Publisher: Elsevier BV
Date: 11-2016
DOI: 10.1016/J.JHAZMAT.2016.06.016
Abstract: New photoactive composites to efficiently remove organic dyes from water are reported. These consist of Cu2O/TiO2 nanoparticles in a novel inorganic geopolymer matrix modified by a large tertiary ammonium species (cetyltrimethylammonium bromide, CTAB) whose presence in the matrix is demonstrated by FTIR spectroscopy. The CTAB does not disrupt the tetrahedral geopolymer structural silica and alumina units as demonstrated by (29)Si and (27)Al MAS NMR spectroscopy. SEM/EDS, TEM and BET measurements suggest that the Cu2O/TiO2 nanoparticles are homogenously distributed on the surface and within the geopolymer pores. The mechanism of removal of methylene blue (MB) dye from solution consists of a combination of adsorption (under dark conditions) and photodegradation (under UV radiation). MB adsorption in the dark follows pseudo second-order kinetics and is described by Freundlich-Langmuir type isotherms. The performance of the CTAB-modified geopolymer based composites is superior to composites based on unmodified geopolymer hosts, the most effective composite containing 5wt% Cu2O/TiO2 in a CTAB-modified geopolymer host. These composites constitute a new class of materials with excellent potential in environmental protection applications.
Publisher: IOP Publishing
Date: 09-03-2023
Abstract: Normal-incidence irradiation by 100 MeV Ag ions is used to improve flux pinning in previously optimised commercial REBCO tapes from the American Superconductor Corporation. We observe distinct critical-current anisotropy enhancements below and above 40 K. Above 40 K a strong c -axis peak appears in the angular dependence of the critical current, as is usually expected upon the introduction of columnar defects. The critical current is enhanced significantly but only for a limited range of field angles. Close to the parallel-field direction there is no enhancement or even a reduction in critical current. Below 40 K, on the other hand, the enhancement is much broader with respect to field angle, creating an almost isotropic response at 20 K, 3 T. The absence of a prominent c -axis peak does not indicate a lack of pinning, since the absolute value of the critical current still increases by a factor of 2.8 compared to an unirradiated s le. Instead, we postulate that pre-existing point-like pinning centres act to mediate an interaction between the existing planar and newly-introduced columnar pins, broadening both contributions. The point-like pins become less effective with increasing temperature as the coherence length increases, leading to a reduction in this interaction and a separation of the in idual peaks relating to planar and columnar pins. At 20 K, we achieve an enhancement in the angular-minimum critical current by a factor of 2.7, in a material that had already been process-optimised for low-temperature pinning.
Publisher: Elsevier BV
Date: 10-2021
Publisher: Elsevier BV
Date: 10-2019
Publisher: Elsevier BV
Date: 05-2012
Publisher: The Electrochemical Society
Date: 2010
DOI: 10.1149/1.3447752
Publisher: Oxford University Press (OUP)
Date: 10-01-2020
DOI: 10.1017/S143192761901523X
Abstract: Microchip technology with electron transparent membranes is a key component for in situ liquid transmission electron microscope (TEM) characterization. The membranes can significantly influence the TEM imaging spatial resolution, not only due to introducing additional material layers but also due to the associated bulging. The membrane bulging is largely defined by the membrane materials, thickness, and short dimension. The impact of the membrane on the spatial resolution, especially the extent of its bulging, was systematically investigated through the impact on the signal-to-noise ratio, chromatic aberration, and beam broadening. The optimization of the membrane parameters is the key component when designing the in situ TEM liquid cell. The optimal membrane thickness of 50 nm was found which balances the impact of membrane bulging and membrane thickness. Beyond this, the short membrane window dimension and the chip nominal spacing should be minimized. However, these two parameters have practical limitations in regards to chip handling.
Publisher: Elsevier BV
Date: 10-2012
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1NR01674A
Abstract: The commercial application of Lithium–sulfur batteries (LSBs) is impeded by the shuttle effect. We report zinc (Zn) and nitrogen (N) co-doped ZIF-8 derived hollow carbon (ZHC) as a promising separator coating for LSBs to control the shuttle effect.
Publisher: Elsevier BV
Date: 05-2022
Publisher: Elsevier BV
Date: 04-2013
Publisher: Elsevier BV
Date: 11-2018
Publisher: Elsevier BV
Date: 03-2020
Publisher: The Electrochemical Society
Date: 18-12-2008
DOI: 10.1149/1.3050400
Abstract: The electrochemical performance of anode supported cells with screen-printed Sr-doped lanthanum cobalt oxide cathodes was studied using electrochemical impedance spectroscopy and polarization measurements. In order to obtain information on the resistance contribution from the cathode alone symmetrical cell measurements were carried out. Analysis of the symmetrical cell data in term of a distribution of relaxation times aided in the selection of an appropriate equivalent circuit for the cathode. Cell performance was dependent on the interdiffusion barrier layer and it was shown that the concentration polarization losses were strongly overlapped with the cathode losses, which complicates the deconvolution of the impedance spectra into in idual process and / or electrode specific contributions.
Publisher: Elsevier BV
Date: 08-2017
Publisher: Walter de Gruyter GmbH
Date: 2011
Abstract: In recent years extended focus has been placed on monitoring and understanding degradation mechanisms in both solid oxide fuel cells and solid oxide electrolysis cells. The time-consuming nature of degradation experiments and the disparate conclusions from experiment reproductions indicates that not all degradation mechanisms are fully understood. Traditionally, cell degradation has been attributed to the materials, processing and cell operating conditions. More recently, focus has been placed on the effect of raw material and gas impurities and their long-term effect on cell degradation. Minor impurities have been found to play a significant role in degradation and in some cases can overshadow the cell operation condition related degradation phenomenon. In this review, several degradation diagnostic tools are discussed, a benchmark for a desirable degradation rate is proposed and degradation behaviour and mechanisms are discussed. For ease of navigation, the review is separated into the various cell components – fuel electrode, electrolyte and oxygen electrode. Finally, nano-particle impregnate stability is discussed.
Publisher: IOP Publishing
Date: 11-04-2016
Publisher: Elsevier BV
Date: 04-2013
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2013
Publisher: American Chemical Society (ACS)
Date: 10-07-2018
Abstract: Reversible solid oxide cells (RSOCs) developed so far display short-term stability during solid oxide electrolysis cell (SOEC) mode. This is due to the delamination of the strontium-doped lanthanum manganite (LSM) air electrode when tested for a long time. Here, we report a highly stable RSOC operation of LSM for 5 cycles using half and full cells. A scandia-stabilized zirconia (SSZ) porous layer was applied between the dense SSZ electrolyte and the porous LSM electrode. The half-cells were tested under ±0.5 A cm
Publisher: Wiley
Date: 19-06-2017
Abstract: Solid-oxide fuel cells (SOFCs) are electricity generators that can convert the chemical energy in various fuels directly to the electric power with high efficiency. Recent advances in materials and related key components for SOFCs operating at ≈500 °C are summarized here, with a focus on the materials, structures, and techniques development for low-temperature SOFCs, including the analysis of most of the critical parameters affecting the electrochemical performance of the electrolyte, anode, and cathode. New strategies, such as thin-film deposition, exsolution of nanoparticles from perovskites, microwave plasma heating, and finger-like channeled electrodes, are discussed. These recent developments highlight the need for electrodes with higher activity and electrolytes with greater conductivity to generate a high electrochemical performance at lower temperatures.
Publisher: Elsevier BV
Date: 11-2011
Publisher: The Electrochemical Society
Date: 2013
DOI: 10.1149/2.023303JES
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2013
Publisher: Wiley
Date: 29-09-2023
Publisher: Wiley
Date: 19-01-2020
Abstract: Invited for this month's cover is the group of Tom Rufford at the University of Queensland. The image shows how choline chloride and urea in a reline solution interact with the surface of a silver cathode to enhance the selectivity of electrochemical CO
Publisher: Wiley
Date: 19-01-2020
Publisher: Wiley
Date: 26-04-2010
Publisher: Elsevier BV
Date: 05-2011
Publisher: Elsevier BV
Date: 25-06-2009
Publisher: American Chemical Society (ACS)
Date: 12-05-2020
Publisher: IOP Publishing
Date: 08-06-2017
Publisher: American Chemical Society (ACS)
Date: 03-07-2019
Abstract: Development of low-cost and cobalt-free efficient cathode materials for oxygen reduction reaction (ORR) remains one of the paramount motivations for material researchers at a low temperature (<650 °C). In particular, iron-based perovskite oxides show promise as electrocatalysts for ORR because Fe metal is cheaper and naturally abundant, exhibit matched thermal expansion with contacting components such as electrolytes, and show high tolerance in a CO
Publisher: Wiley
Date: 03-07-2021
Abstract: 2D non‐layered materials (2DNLMs) featuring massive undercoordinated surface atoms and obvious lattice distortion have shown great promise in catalytic/electrocatalytic applications, but their controllable synthesis remains challenging. Here, a new type of ultrathin carbon‐wrapped titanium nitride nanomesh (TiN NM@C) is prepared using a rationally designed nano‐confinement topochemical conversion strategy. The ultrathin 2D geometry with well‐distributed pores offers TiN NM@C plentiful exposed active sites and rapid charge transfer, leading to outstanding electrocatalytic performance tackling the sluggish sulfur redox kinetics in lithium‐sulfur batteries (LSBs). LSBs employing TiN NM@C electrocatalyst deliver excellent rate capabilities (e.g., 304 mAh g −1 at 10 C), greatly outperforming that of using TiN nanoparticles embedded in carbon nanosheets (TiN NPs@C) as a benchmark. More impressively, a free‐standing electrode for LSBs with a high sulfur loading of 7.3 mg cm −2 is demonstrated, showing a high peak areal capacity of 5.6 mAh cm −2 at a high current density of 6.1 mA cm −2 . This work provides a new avenue for the facile and controllable fabrication of 2DNLMs with impressive electrocatalysis for LSBs as well as other energy conversion and storage technologies.
Publisher: Elsevier BV
Date: 06-2020
Publisher: The Electrochemical Society
Date: 2011
DOI: 10.1149/1.3571249
Publisher: Wiley
Date: 07-08-2020
Publisher: Springer Science and Business Media LLC
Date: 26-04-2021
Publisher: Elsevier BV
Date: 05-2020
Publisher: ASMEDC
Date: 2010
DOI: 10.1115/FUELCELL2010-33039
Abstract: The two braze alloys TiCuNi® and Silver-ABA® were tested as possible candidates for seals in SOFC or SOEC stacks. The different Ti amount in the s les allowed an evaluation of Ti as a matrix filler and as an active metal/wetting agent in brazing alloys. The sealing ability towards ferritic steel and yttria-stabilized-zirconia (YSZ) was investigated. After the sealing process steel/braze/YSZ joints were further annealed in oxidizing (Air) or reducing (9% H2 in Ar) atmospheres at 750 °C for 150 h. The boundaries of the braze and the joining partners for as-sealed and annealed s les were examined with SEM/EDS. XRD and EXAFS were used to characterize reaction products after the annealing process. Based on these results and taking before reported data into consideration, the advantages and disadvantages of Ti containing seals and the role of Ti in failure mechanism are discussed. Even if the use of Ti in active brazing alloys has its benefits, the disadvantages caused by Ti and its reaction products strongly suggest the use of Ti free brazes in SOFC/SOEC applications.
Publisher: Elsevier BV
Date: 05-2021
Publisher: American Chemical Society (ACS)
Date: 17-07-2020
Publisher: Wiley
Date: 19-07-2023
Abstract: The irreversibility of anion intercalation‐deintercalation is a fundamental issue in determining the cycling stability of a dual‐ion battery (DIB). In this work, we demonstrate that using a partially fluorinated carbonate solvent can drive a beneficial fluorinated secondary interphase layer formation. Such layer facilitates reversible anion (de−)intercalation processes by impeding solvent molecule co‐intercalation and the associated graphite exfoliation. The enhanced reversibility of anion transport contributes to the overall cycling stability for a Zn‐graphite DIB—a high Coulombic efficiency of 98.5 % after 800 cycles, with an attractive discharge capacity of 156 mAh g −1 and a mid‐point discharge voltage of ≈1.7 V (at 0.1 A g −1 ). In addition, the formed fluorinated secondary interphase suppresses the self‐discharge behavior, preserving 29 times of the capacity retention rate compared to the battery with a commonly used carbonate solvent, after standing for 24 hours. This work provides a simple and effective strategy for addressing the critical challenges in graphite‐based DIBs and contributes to fundamental understanding to help accelerate their practical application.
Publisher: American Chemical Society (ACS)
Date: 05-12-2019
Publisher: Elsevier BV
Date: 05-2020
Publisher: Informa UK Limited
Date: 10-02-2022
Publisher: Wiley
Date: 06-11-2020
Abstract: Achieving high product selectivities is one challenge that limits viability of electrochemical CO
Publisher: Springer Science and Business Media LLC
Date: 11-01-2007
Publisher: The Electrochemical Society
Date: 2012
DOI: 10.1149/2.076208JES
Publisher: Wiley
Date: 29-09-2023
Publisher: Elsevier BV
Date: 09-2021
Publisher: Wiley
Date: 15-10-2019
Publisher: Elsevier BV
Date: 08-2021
Publisher: Wiley
Date: 16-04-2010
Publisher: Wiley
Date: 19-07-2023
Abstract: The irreversibility of anion intercalation‐deintercalation is a fundamental issue in determining the cycling stability of a dual‐ion battery (DIB). In this work, we demonstrate that using a partially fluorinated carbonate solvent can drive a beneficial fluorinated secondary interphase layer formation. Such layer facilitates reversible anion (de−)intercalation processes by impeding solvent molecule co‐intercalation and the associated graphite exfoliation. The enhanced reversibility of anion transport contributes to the overall cycling stability for a Zn‐graphite DIB—a high Coulombic efficiency of 98.5 % after 800 cycles, with an attractive discharge capacity of 156 mAh g −1 and a mid‐point discharge voltage of ≈1.7 V (at 0.1 A g −1 ). In addition, the formed fluorinated secondary interphase suppresses the self‐discharge behavior, preserving 29 times of the capacity retention rate compared to the battery with a commonly used carbonate solvent, after standing for 24 hours. This work provides a simple and effective strategy for addressing the critical challenges in graphite‐based DIBs and contributes to fundamental understanding to help accelerate their practical application.
Publisher: Wiley
Date: 10-04-2019
Publisher: Elsevier BV
Date: 09-2020
Publisher: Elsevier BV
Date: 05-2008
Publisher: Wiley
Date: 08-2018
Publisher: Wiley
Date: 16-07-2019
Publisher: Elsevier BV
Date: 10-2010
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2022
Publisher: The Electrochemical Society
Date: 15-10-2010
DOI: 10.1149/1.3501097
Abstract: Under high current density, polarization losses in a solid oxide cell are higher in electrolysis mode than in fuel cell mode. Although part of these differences under high current density can be attributed to gas diffusion differences between steam and hydrogen. Diffusion coefficient differences can only partially explain the higher polarization losses during electrolysis operation.
Publisher: American Chemical Society (ACS)
Date: 11-08-2021
Publisher: Elsevier BV
Date: 07-2020
Publisher: Elsevier BV
Date: 03-2021
Start Date: 2019
End Date: 2022
Funder: Marsden Fund
View Funded ActivityStart Date: 11-2023
End Date: 11-2026
Amount: $392,232.00
Funder: Australian Research Council
View Funded ActivityStart Date: 03-2023
End Date: 02-2027
Amount: $940,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2019
End Date: 06-2021
Amount: $540,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 06-2020
End Date: 07-2023
Amount: $400,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 12-2023
End Date: 12-2030
Amount: $34,956,464.00
Funder: Australian Research Council
View Funded ActivityStart Date: 10-2023
End Date: 10-2024
Amount: $740,700.00
Funder: Australian Research Council
View Funded ActivityStart Date: 03-2019
End Date: 03-2020
Amount: $844,947.00
Funder: Australian Research Council
View Funded Activity