https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 Nanoporous carbon oxynitride and its enhanced lithium-ion storage performance https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:44363 Mon 29 Jan 2024 18:53:13 AEDT ]]> Catalytic synthesis of 3D graphene nanostructures from biomass-based activated carbon with excellent lithium storage performance https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:53603 Mon 29 Jan 2024 18:21:19 AEDT ]]> Design of P-doped mesoporous carbon nitrides as high-performance anode materials for Li-ion battery https://nova.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 ]]> Synthesis of high reversibility anode composite materials using T-Nb₂O₅ and coal-based graphite for lithium-ion battery applications https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46324 –2 composite presents a high capacity, outstanding cyclic stability, and superior reversibility. The newly developed composite of T-Nb₂O₅/CBG–2 indicates an initial specific capacity of 378 and 661 mAh g–1 at 0.02 A g–1 in the charge/discharge process. At a current density of 0.2 A g–1, the T-Nb₂O₅/CBG–2 composite materials can maintain a stable capacity of 216 mAh g–1 after 100 cycles. Moreover, after the current density has returned to 0.02 A g–1, it is possible to recover a large capacity of 416 mAh g–1, which represents the excellent reversibility of T-Nb₂O₅/CBG-2.]]> Mon 29 Jan 2024 17:44:37 AEDT ]]> Preparation of synthetic graphite from bituminous coal as anode materials for high performance lithium-ion batteries https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:47475 Mon 23 Jan 2023 11:26:24 AEDT ]]> Porous graphene prepared from anthracite as high performance anode materials for lithium-ion battery applications https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:42584 −1) and large pore volume (3.792 cm³ g−1) with large amount of structural defects and nanopores, which provides sufficient active sites for lithium ions storage and offers favorable pathways for the fast transportation of lithium ions and electrons. When used as anode materials for lithium-ion batteries, such porous graphene exhibits a high reversible capacity of 770 mAh·g−1 at current density of 0.1 C, and possesses an outstanding rate capability with desirable capacities of 274 mAh·g−1 and 224 mAh·g−1 even at high current densities of 10 C and 20 C. Moreover, such porous graphene also demonstrates superior cycling performance up to 98.0% of the initial reversible capacity retention after 110 cycles. This study paves a promising approach to the large-scale production of porous graphene from coal for high performance anode materials used in lithium-ion batteries.]]> Fri 26 Aug 2022 08:19:19 AEST ]]> Green synthesis of porous graphitic carbons from coal tar pitch templated by nano-CaCO₃ for high-performance lithium-ion batteries https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:42583 Fri 26 Aug 2022 08:16:36 AEST ]]>