Browsing School of Physics by Author "Nicolosi, Valeria"
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2D nanosheets from fool's gold by LPE: High performance lithium-ion battery anodes made from stone
Coleman, Jonathan; Nicolosi, Valeria (2021)Recently, it has been shown that it is possible to apply liquid-phase exfoliation to non-layered materials, yielding quasi-2D nanosheets. It has been proposed that even a slight bonding anisotropy in the starting crystal ... -
3D Printing of Multifunctional Conductive Polymer Composite Hydrogels
Coleman, Jonathan; Nicolosi, Valeria; Stamenov, Plamen (2023)Functional conductive hydrogels are widely used in various application scenarios, such as artificial skin, cell scaffolds, and implantable bioelectronics. However, their novel designs and technological innovations are ... -
Additive Manufacturing of Li-Ion Batteries: A Comparative Study between Electrode Fabrication Processes
Schmitt, Wolfgang; Coleman, Jonathan; Nicolosi, Valeria (2023)Additive manufacturing strategies are gaining more importance in the context of lithium-ion batteries. The rapid prototyping, reduced waste and complex 3D structures achievable are powerful and attractive tools that are ... -
Additive-free MXene inks and direct printing of micro-supercapacitors
Coleman, Jonathan; Nicolosi, Valeria; Mc Evoy, Niall (2019)Direct printing of functional inks is critical for applications in diverse areas including elec-trochemical energy storage, smart electronics and healthcare. However, the available prin-table ink formulations are far from ... -
Edge and confinement effects allow in situ measurement of size and thickness of liquid-exfoliated nanosheets
Mc Closkey, David; Nicolosi, Valeria; Duesberg, Georg; Donegan, John; Mc Evoy, Niall; Coleman, Jonathan (2014)Two-dimensional nanomaterials such as MoS2 are of great interest both because of their novel physical properties and their applications potential. Liquid exfoliation, an important production method, is limited by our ... -
High Areal Capacity Battery Electrodes Enabled by Segregated Nanotube Networks
Coleman, Jonathan; Mc Evoy, Niall; Nicolosi, Valeria (2019)Increasing the energy storage capability of lithium-ion batteries necessitates maximization of their areal capacity. This requires thick electrodes performing at near-theoretical specific capacity. However, achievable ... -
High capacity silicon anodes enabled by MXene viscous aqueous ink
Coleman, Jonathan; Nicolosi, Valeria; Mc Evoy, Niall (2019)The ever-increasing demands for advanced lithium-ion batteries have greatly stimulated thequest for robust electrodes with a high areal capacity. Producing thick electrodes from a high-performance active material would ... -
Liquid Exfoliated SnP<inf>3</inf> Nanosheets for Very High Areal Capacity Lithium-Ion Batteries
Coleman, Jonathan; Nicolosi, Valeria (2021)ncreasing the energy density of lithium‐ion batteries requires the discovery of new electrode materials capable of achieving very high areal capacity. Here, liquid phase exfoliation is used to produce nanosheets of SnP3, ... -
Liquid phase exfoliation of MoO<inf>2</inf> nanosheets for lithium ion battery applications
Coleman, Jonathan; Nicolosi, Valeria; Boland, John (2019)Molybdenum dioxide (MoO2) is a layered material which shows promise for a number of applications in the electrochemical energy storage arena. Mostly studied as a bulk layered material, MoO2 has not previously been exfoliated ... -
Liquid Phase Exfoliation of Nonlayered Non-Van der Waals Iron Trifluoride (FeF3) into 2D-Platelets for High-Capacity Lithium Storing Cathodes
Coleman, Jonathan; Venkatesan, Munuswamy; Nicolosi, Valeria (2022)Developing high-performance cathode materials for lithium-ion batteries is necessary to maximise both energy and power density. One promising cathode material is iron trifluoride (FeF3) having a high theoretical capacity ... -
Liquid Processing of Interfacially Grown Iron-Oxide Flowers into 2D-Platelets Yields Lithium-Ion Battery Anodes with Capacities of Twice the Theoretical Value
Coleman, Jonathan; Nicolosi, Valeria (2022)Iron oxide (Fe2O3) is an abundant and potentially low-cost material for fabricating lithium-ion battery anodes. Here, the growth of α-Fe2O3 nano-flowers at an electrified liquid–liquid interface is demonstrated. Sonication ... -
Oxide-mediated self-limiting recovery of field effect mobility in plasma-treated MoS2
Mc Guinness, Cormac; Zhang, Hongzhou; Ferreira, Mauro; Bradley, Louise; Boland, John; Nicolosi, Valeria (2018) -
Preparation of gallium sulfide nanosheets by liquid exfoliation and their application as hydrogen evolution catalysts
Duesberg, Georg; Coleman, Jonathan; Donegan, John; Nicolosi, Valeria; Mc Evoy, Niall; Mc Closkey, David (2015)Here we demonstrate the production of large quantities of gallium sulfide (GaS) nanosheets by liquid exfoliation of layered GaS powder. The exfoliation was achieved by sonication of the powder in suitable solvents. The ... -
Quantifying the dependence of battery rate performance on electrode thickness
Coleman, Jonathan; Nicolosi, Valeria (2020)Simultaneous optimization of capacity and rate performance in battery electrodes would be much simplified by access to a simple equation relating rate performance to electrode thickness. Although a number of equations have ... -
Quantifying the Effect of Separator Thickness on Rate Performance in Lithium-Ion Batteries
Nicolosi, Valeria; Coleman, Jonathan (2022)In addition to improving parameters such as energy density and stability, it is important to maximise rate performance in lithium ion batteries. While much work has focused on rate-limiting factors associated with the ... -
Quantifying the factors limiting rate-performance in battery electrodes
Coleman, Jonathan; Nicolosi, Valeria (2019)One weakness of batteries is the rapid falloff in charge-storage capacity with increasing charge/discharge rate. Rate performance is related to the timescales associated with charge/ionic motion in both electrode and ... -
Quantifying the Trade-Off between Absolute Capacity and Rate Performance in Battery Electrodes
Coleman, Jonathan; Nicolosi, Valeria (2019)Among other things, battery electrodes need to display large absolute capacities coupled with high rate performance. However, enhancing areal capacity, for example via increased electrode thickness, results in reductions ... -
Self-Assembly of Atomically Thin Chiral Copper Heterostructures Templated by Black Phosphorus
Coleman, Jonathan; Sanvito, Stefano; Nicolosi, Valeria; Jones, Lewys (2019)The fabrication of 2D systems for electronic devices is not straightforward, with top‐down low‐yield methods often employed leading to irregular nanostructures and lower quality devices. Here, a simple and reproducible ... -
Suppression of the Shear Raman Mode in Defective Bilayer MoS2
Nicolosi, Valeria; Mc Evoy, Niall; Zhang, Hongzhou (2019)We investigate the effects of lattice disorders on the low frequency Raman spectra of bilayer MoS 2. The bilayer MoS 2 was subjected to defect engineering by irradiation with a 30 keV He + ion beam, and the induced morphology ... -
Using chronoamperometry to rapidly measure and quantitatively analyse rate-performance in battery electrodes
Coleman, Jonathan; Nicolosi, Valeria (2020)For battery electrodes, measured capacity decays as charge/discharge current is increased. Such rate-performance is usually characterised via galvanostatic charge-discharge measurements, experiments which are very slow, ...