https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:40922 2) are expected to offer superior basicity and unique electronic properties. However, the synthesis of these nanostructures is highly challenging since many parts of the C-N frameworks in the carbon nitride should be replaced with thermodynamically less stable N-N frameworks as the nitrogen content increases. Thermodynamically stable C₃N₇ and C₃N₆ with an ordered mesoporous structure are synthesized at 250 and 300 °C respectively via a pyrolysis process of 5-amino-1H-tetrazole (5-ATTZ). Polymerization of the precursor to the ordered mesoporous C₃N₇ and C₃N₆ is clearly proved by X-ray and electron diffraction analyses. A combined analysis including diverse spectroscopy and FDMNES and density functional theory (DFT) calculations demonstrates that the N-N bonds are stabilized in the form of tetrazine and/or triazole moieties in the C₃N₇ and C₃N₆. The ordered mesoporous C₃N₇ represents the better oxygen reduction reaction (ORR) performances (onset potential: 0.81 V vs reversible hydrogen electrode (RHE), electron transfer number: 3.9 at 0.5 V vs RHE) than graphitic carbon nitride (g-C₃N₄) and the ordered mesoporous C₃N₆. The study on the mechanism of ORR suggests that nitrogen atoms in the tetrazine moiety of the ordered mesoporous C₃N₇ act as active sites for its improved ORR activity.]]> Tue 16 Aug 2022 10:28:43 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46886 –1) compared to the nonporous S-CN (167.9 mA h g^–1) and g-C₃N₄ (5.4 mA h g^–1), highlighting the pivotal roles of the highly ordered mesoporous structure and S-doping in enhancing the electrochemical functionality of carbon nitride as an anode material for SIBs.]]> Tue 06 Dec 2022 09:52:16 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:45545 Tue 01 Nov 2022 10:07:02 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:41200 Thu 28 Jul 2022 11:19:36 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43339 Thu 15 Sep 2022 15:11:28 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39128 –1 even after 1000 cycles at a current density of 1 A g^–1, which is much higher than that of other counterparts comprising s-triazine (C₃H₃N₃, g-C₃N₄), pristine MCN-1, and B-containing MCN-1 (B-MCN-1) subunits or carbon allotropes like CNT and graphene (rGO) materials. The P-MCN-1 electrode also exhibits exceptional rate capability even at high current densities of 5, 10, and 20 A g^–1 delivering 685, 539, and 274 mAh g^–1, respectively, after 2500 cycles. The high electrical conductivity and Li-ion diffusivity (D), estimated from electrochemical impedance spectra (EIS), very well support the extraordinary electrochemical performance of the P-MCN-1. Higher formation energy, lower bandgap value, and high Li-ion adsorption ability predicted by first principle calculations of P-MCN-1 are in good agreement with experimentally observed high lithium storage, stable cycle life, high power capability, and minimal irreversible capacity (IRC) loss. To the best of our knowledge, it is an entirely new material with the combination of ordered mesostructures with P codoping in carbon nitride substructure which offers superior performance for LIB, and hence we believe that this work will create new momentum for the design and development of clean energy storage devices.]]> Mon 29 Jan 2024 17:48:09 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36506 Mon 25 May 2020 12:08:47 AEST ]]>