https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49795 Wed 31 May 2023 15:25:08 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:50028 Wed 28 Jun 2023 09:49:40 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39521 Wed 27 Jul 2022 14:01:33 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:45067 Wed 26 Oct 2022 11:43:26 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:50683 Wed 24 Apr 2024 11:33:08 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46459 2 batteries using a mild electrolyte have attracted considerable interest because of their high output voltage, high safety, low cost, and environmental friendliness. However, poor cycling stability remains a significant issue for their applications. Equally, the energy storage mechanism involved is still controversial thus far. Herein, porous polyfurfural/MnO₂ (PFM) nanocomposites are prepared via a facile one-step method. When tested in a rechargeable aqueous Zn–MnO₂ cell, the PFM nanocomposites deliver high specific capacity, considerable rate performance, and excellent long-term cyclic stability. Based on the experimental results, the role of the hydrated basic zinc sulfate layer being linked to the cycling stability of the aqueous rechargeable zinc-ion batteries is revealed. The mechanistic details of the insertion reaction based on the H⁺ ion storage mechanism are proposed, which plays a crucial role in maintaining the cycling performance of the rechargeable aqueous Zn–MnO₂ cell. We expect that this work will provide an insight into the energy storage mechanism of MnO₂ in aqueous systems and pave the way for the design of long-term cycling stable electrode materials for rechargeable aqueous Zn–MnO₂ batteries.]]> Wed 23 Nov 2022 14:25:58 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:38957 Wed 16 Mar 2022 14:12:17 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51028 Wed 16 Aug 2023 10:09:34 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49889 Wed 14 Jun 2023 17:31:45 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32370 Wed 04 Sep 2019 12:17:58 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46663 3−x) electrode with an ultrahigh mass loading of 15.4 mg cm⁻² on a functionalized partially exfoliated graphite substrate using a facile electrochemical method. In addition to the highly open graphene nanosheets atop, the unique layered structures of intercalated graphite sheets ensure efficient ionic transport in the entire MoO_3−x electrode. The oxygen-containing functional groups on the exfoliated graphene can bind strongly with the MoO_3−x via formation of C–O–Mo bonding, which provides a fast electron transport path from graphene to MoO_3−x and thus allows high reversible capacity and excellent rate performance. The optimized MoO_3−x electrode delivers an outstanding areal capacitance of 4.03 F cm⁻² at 3 mA cm⁻² with an excellent rate capability which is significantly higher than the values of other molybdenum oxide based electrodes reported to date. More importantly, the areal capacitance increases proportionally with the MoO_3−x mass loading, indicating that the capacitive performance is not limited by ion diffusion even at such a high mass loading. An asymmetric supercapacitor (ASC) assembled with an MoO_3−x anode delivers a maximum volumetric energy density of 2.20 mW h cm⁻³ at a volumetric power density of 3.60 mW cm⁻³, which is superior to those of the majority of the state-of-the-art supercapacitors.]]> Mon 28 Nov 2022 18:32:21 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:48488 −2 on a carbon cloth substrate is achieved, accompanied by substantially improved facile ionic and electronic transport due to the highly open well-defined nanoarray architecture. The growth mechanism of Zn–Ni–Co TOH was studied in depth by scanning electron microscopy analysis. The optimized Zn–Ni–Co TOH-130 nanowire array electrode delivered an outstanding areal capacitance of 2.14 F cm⁻² (or a specific capacitance of 305 F g⁻¹) at 3 mA cm−2 and an excellent rate capability. Moreover, the asymmetric supercapacitor assembled with our Zn–Ni–Co TOH-130 cathode exhibited a maximum volumetric energy density of 2.43 mW h cm⁻³ at a volumetric power density of 6 mW cm⁻³ and a long-term cycling stability (153% retention after 10 000 cycles), which is superior to the majority of the state-of-the-art supercapacitors. This work paves the way for the construction of high-capacity cathode materials for widespread applications including next-generation wearable energy-storage devices.]]> Mon 20 Mar 2023 11:30:42 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:35507 Mon 19 Aug 2019 16:30:25 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:40721 Mon 18 Jul 2022 11:34:18 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:41276 2 have been successfully stabilized and uniformly distributed on the surface of n-butyl triethyl ammonium bromide functionalized polypyrrole/graphene oxide (BTAB/PPy/GO) by a very simple hydrothermal method. BTAB as a typical kind of quaternary ammonium-type ionic liquids (ILs) played a crucial role in the formation of the obtained 1T-MoS₂/BTAB/PPy/GO. It was covalently linked with PPy/GO and arranged in a highly ordered order at the solid–liquid interface of PPy/GO and H₂O due to Coulombic interactions and other intermolecular interactions, which would induce and stabilize ultrathin 1T-MoS₂ nanoplates by morphosynthesis. The good electrocatalytic activity toward nitrogen reduction reaction (NRR) with strong durability and good stability can be achieved by 1T-MoS₂/BTAB/PPy/GO due to their excellent inorganic/organic hierarchical lamellar micro-/nanostructures. Especially, after the long-term electrocatalysis for NRR at a negative potential, metastable 1T-MoS2 as the catalytic center undergoes two types of irreversible crystal phase transition, which was converted to 1T′-MoS₂ and Mo₂N, caused by the competitive hydrogen evolution reaction (HER) process and the electrochemical reaction between the electroactive 1T-MoS₂ and N₂, respectively. The new N–Mo bonding prevents Mo atoms from binding to other N atoms in N₂, resulting in the deactivation of the electrocatalysts to NRR after being used for 18 h. Even so, quaternary ammonium-type ILs would induce the crystal structures of transition-metal dichalcogenides (TMDCs), which might provide a new thought for the reasonable design of electrocatalysts based on TMDCs for electrocatalysis.]]> Mon 01 Aug 2022 10:10:30 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:48649 Fri 24 Mar 2023 15:57:41 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39119 Fri 16 Dec 2022 12:01:46 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:41828 Fri 12 Aug 2022 12:52:33 AEST ]]>