https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37131 Wed 19 Aug 2020 13:34:43 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36263 2 and sp³ structures have been identified. The level of functionalization decreases in carbons with reduced amorphous and increased graphitic character. Thermal decomposition of electrodepositied carbons has been investigated and zero order kinetics have been identified. A relationship has been identified between elevated oxygen functionalization and increased pseudo-capacitance, with carbons deposited at 0.15 A cm⁻² showing capacitances of 400 F g⁻¹ in 0.5 M H₂SO₄ at sweep rates of 10 mV s⁻¹.]]> Wed 18 Mar 2020 12:27:30 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:20671 Wed 11 Apr 2018 16:11:32 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36716 2SO₄ and the synthesized carbons has been investigated in a manner which may be generalised to analyse other supercapacitive systems, and the electrolyte coverage, porosity, and Mott-Schottky behaviour of the materials have been quantified. High, frequency-dependent, capacitances of up to 160 F g⁻¹ have been obtained for carbons deposited at either low temperature or low current density, and for carbons deposited in binary Li₂CO_3–K₂CO₃ eutectics.]]> Tue 27 Feb 2024 14:03:13 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46305 Tue 15 Nov 2022 10:07:55 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:38192 Tue 10 Aug 2021 16:28:51 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26869 Thu 16 Mar 2017 14:30:42 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43377 Thu 15 Sep 2022 16:14:33 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33540 Thu 15 Nov 2018 15:26:24 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33541 Thu 15 Nov 2018 15:26:23 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33542 Thu 15 Nov 2018 15:26:23 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46656 Mon 29 Jan 2024 18:02:50 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46626 2 atmosphere when compared with a N₂ atmosphere, where mass transport limitations in the anode compartment and the additional two-electron oxidation pathway from CO contribute. This hypothesis is verified by comparing the slurry arrangement to a solid working anode where mass transport is not required. In order to maximize the carbon utilization efficiency, operating below the thermodynamic temperature limit for reverse Boudouard gasification (700 °C) is recommended with agitation in slurry-based systems. For a maximum power output, operating under CO₂ at higher temperatures (>800 °C) and passing the CO containing flue gas over an oxygen reduction cathode achieve optimal results.]]> Mon 28 Nov 2022 13:29:36 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36848 2CO₃-Na₂CO₃-K₂CO₃ eutectic is used to produce highly amorphous carbon with considerable oxygen functionalization in a process focusing on the conversion of CO₂ to value-added carbon. Electrochemical characterization of materials using multiple techniques in different electrolytes allowed for the optimization of these materials as electrochemical capacitor electrodes. Variation in capacitive performance of the investigated materials has been provided based on their physical characteristics. The synthesized carbons are hybrid materials, showing both pseudocapacitive and electric double layer contributions to the total performance. Annealing under nitrogen at 800 °C is shown to widen pores in the carbon material, resulting in an increase in medium scan rate (5-10 mV.s^-1) capacitance. A stable specific capacitance of 425 F.g^-1 is obtained at 5 mV s^-1 in 0.5 M Na₂SO₄ after 1000 cycles.]]> Mon 13 Mar 2023 14:32:38 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44461 Fri 14 Oct 2022 09:07:54 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26455 Fri 10 Jul 2020 13:31:04 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36855 2g^-1 have been produced through the electrolytic reduction of molten Li₂CO_3-K₂CO_3-Na₂CO₃ at the eutectic composition (43.5:25:31.5 mol%) onto /graphite at 600 °C and 0.30 A cm^-2 under a 60 mL min^-1 CO₂ gas flow. These carbons have been shown to consist largely of amorphous carbon with some spherical and flake-like conglomerates. Functionalised oxygen has been observed in synthesised carbons using FTIR and XPS. Synthesised carbons have been investigated in 3-electrode cells and analysed using cyclic voltammetry and step potential electrochemical spectroscopy (SPECS) at room temperature. Capacitances as high as 450 F g^-1 have been observed at 0.0833 mV s^-1 scan rates. The EDLC and pseudo-capacitive behaviour of produced carbons have been analysed and it has been found that the produced carbons behave hybrid capacitors with considerable pseudo-capacitive contributions. The performance of synthesised carbons has been compared to that of activated carbon derived through the chemical activation of carbon from the pyrolysis of coconut husks and to the reported capacitances of commercial activated carbons.]]> Fri 10 Jul 2020 13:30:07 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36718 −1 have been obtained at scan rates of 10 mV.s⁻¹. With respect to temperature of carbon deposition, carbon electrodeposited at 500°C has been identified as the best electrical double layer capacitor type material, and as a superior material for pseudocapacitive applications. The performance of a control activated carbon has been compared with the electrodeposited carbons, and it has been shown that, when electrodeposited at low current densities, the resultant carbon performance is superior to the activated carbon.]]> Fri 10 Jul 2020 12:56:42 AEST ]]>