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Recent progress in sulfur cathodes for application to lithium-sulfur batteries

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Particuology 2021年第5期19卷 1-15页

作者： Yongying Li joseph g.shapter Hui Cheng guiying Xu guo gao Key Laboratory for Thin Film and Micro Fabrication of the Ministry of Education Department of Instrument Science and TechnologySchool of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Australian Institute of Bioengineering and Nanotechnology(AIBN) University of QueenslandSt.LuciaQueensland 4072Australia

Owing to the extensive use of fossil fuels for energy,environmental problems are becoming increasingly ***,renewable clean energy sources must be urgently *** an environmentally friendly electrochemical energy-storage system,lithium-ion batteries(LIBs)are widely used in portable devices,electric vehicles,and medical ***,owing to their high cost and low theoretical energy density,LIBs are far from meeting the current energy ***-sulfur batteries(LSBs)(wherein lithium metal and sulfur are the anode and cathode,respectively)are one of the most valuable secondary batteries because of their high theoretical energy density(-2600Whkg^(-1)).However,the intrinsic conductivity of sulfur cathode materials is poor,and the lithium polysulfide formed during lithiation dissolves ***,the volumetric expansion during charging and discharging adversely affects the LSB electrochemical performance,including the rate performance,cycle life,and coulombic ***,to improve the LSB electrochemical performance,various sulfur composites have been prepared using carbon materials,metallic oxides,and conductive polymers,and various composite cathode materials recently developed for application to LSBs were ***,research directions were proposed for modifying LSB cathode materials.

关键词： Lithium-sulfur batteries(LSBs) Cathode materials Hybrid composites Energy storage

Pyramid-Textured Antireflective Silicon Surface In graphene Oxide/Single-Wall Carbon Nanotube–Silicon Heterojunction Solar Cells

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Energy & Environmental Materials 2018年第4期1卷 232-240页

作者： LePing Yu Munkhbayar Batmunkh Mahnaz Dadkhah Cameron J.Shearer joseph g.shapter Flinders Institute for Nanoscale Science and Technology College of Science and EngineeringFlinders UniversityBedford ParkSA 5042Australia School of Chemistry and Chemical EngineeringShanghai University of Engineering ScienceShanghai201620PR China Flinders Institute for Nanoscale Science and Technology College of Science and EngineeringFlinders UniversityBedford ParkSA 5042Australia Australian Institute for Bioengineering and Nanotechnology University of QueenslandSt.Lucia Qld 4072Australia Department of Chemistry The University of AdelaideAdelaideSA 5005Australia

Antireflection layers are commonly used in photovoltaics to increase light absorption and therefore increase maximum ***,pyramid structures are created on Si surfaces with alkaline solution *** extent of pyramid cover... 详细信息

关键词： antireflection treatment carbon nanotubes solar cells

Poly(thiourea triethylene glycol) as a multifunctional binder for enhanced performance in lithium-sulfur batteries

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green Energy & Environment 2022年第6期7卷 1206-1216页

作者： Luke Hencz Hao Chen Zhenzhen Wu Xingxing gu Meng Li Yuhui Tian Su Chen Cheng Yan Abdulaziz S.R.Bati joseph g.shapter Milton Kiefel Dong-Sheng Li Shanqing Zhang Centre for Clean Environment and Energy Griffith University Gold Coast CampusSouthportQLD4222Australia Chongqing Key Laboratory of Catalysis and New Environmental Materials College of Environment and ResourcesChongqing Technology and Business UniversityChongqing400067China School of Mechanical Medical and Process EngineeringQueensland University of Technology(QUT)BrisbaneQLD4000Australia Australian Institute for Bioengineering and Nanotechnology(AIBN) The University of QueenslandSt.LuciaBrisbaneQLD4072Australia Institute for glycomics Gold Coast CampusGriffith UniversitySouthportQLD4222Australia College of Materials and Chemical Engineering China Three Gorges UniversityNo.8Daxue RoadYichang443002China

A mechanically strong binder with polar functional groups could overcome the dilemma of the large volume change during charge/discharge processes and poor cyclability of lithium-sulfur batteries(LSBs).In this work,for the first time,we report the use of poly(thiourea triethylene glycol)(PTTg)as a multifunctional binder for sulfur cathodes to enhance the performance of *** expected,the PTTg binder facilitates the high performance and stability delivered by the Sulfur-PTTg cathode,including a higher reversible capacity of 825 mAh g^(-1) at 0.2 C after 80 cycles,a lower capacity fading(0.123%per cycle)over 350 cycles at 0.5 C,a higher areal capacity of 2.5 mAh cm^(-2) at 0.25 mA cm^(-2),and better rate capability of 587 mAh g^(-1) at 2 *** superior electrochemical performances could be attributed to PTTg's strong chemical adsorption towards polysulfides which may avoid the lithium polysulfide shuttle effect and excellent mechanical characteristics which prevents electrode collapse during cycling and allows the Sulfur-PTTg electrode to maintain robust electron and ion migration pathways for accelerated redox reaction kinetics.

关键词： Lithium-sulfur battery Polymer binder Chemical adsorption DFT poly(thiourea triethylene glycol)

Understanding the oxidation chemistry of Ti_(3)C_(2)T_(x)(MXene)sheets and their catalytic performances

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Journal of Energy Chemistry 2024年第1期88卷 437-445,I0010页

作者： Suvdanchimeg Sunderiya Selengesuren Suragtkhuu Solongo Purevdorj Tumentsereg Ochirkhuyag Munkhjargal Bat-Erdene Purevlkham Myagmarsereejid Ashley DSlattery Abdulaziz SRBati joseph gshapter Dorj Odkhuu Sarangerel Davaasambuu Munkhbayar Batmunkh Department of Chemistry Division of Natural SciencesSchool of Arts and SciencesNational University of MongoliaUlaanbaatar 14200Mongolia Queensland Micro-and Nanotechnology Centre School of Environment and ScienceGriffith UniversityNathan campusBrisbaneQueensland 4111Australia Department of Physics Incheon National UniversityIncheon 22012Republic of Korea Australian Institute for Bioengineering and Nanotechnology The University of QueenslandSt LuciaBrisbaneQueensland 4072Australia Adelaide Microscopy The University of AdelaideAdelaideSouth Australia 5005Australia Centre for Organic Photonics&Electronics School of Chemistry and Molecular BiosciencesThe University of QueenslandSt LuciaBrisbaneQueensland 4072Australia

Transition metal carbides and nitrides(MXenes)nanosheets are attractive two-dimensional(2D)materials,but they suffer from oxidation/degradation issues during storage and/or applications due to their sensitivity to water and *** the great research progress,the exact oxidation kinetics of Ti_(3)C_(2)T_(x)(MXene)and their final products after oxidation are not fully ***,we systematically tracked the oxidation process of few-layer Ti_(3)C_(2)T_(x) nanosheets in an aqueous solution at room temperature over several *** also studied the oxidation effects on the electrocatalytic properties of Ti_(3)C_(2)T_(x) for hydrogen evolution reaction and found that the overpotential to achieve a current density of 10 mA cm^(-2)increases from 0.435 to 0.877 V after three weeks of degradation,followed by improvement to stabilized values of around 0.40 V after eight *** results suggest that severely oxidized MXene could be a promising candidate for designing efficient *** to our detailed experimental characterization and theoretical calculations,unlike previous studies,black titanium oxide is formed as the final product in addition to white Ti(IV)oxide and disordered carbons after the complete oxidation of Ti_(3)C_(2)T_(x).This work presents significant advancements in better understanding of 2D Ti_(3)C_(2)T_(x)(MXene)oxidation and enhances the prospects of this material for various applications.

关键词： 2D materials MXene Chemical degradation Catalysis Hydrogen evolution reaction

A review of metal nanoparticle-based surface-enhanced Raman scattering substrates for severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)detection Special Collection:Distinguished Australian Researchers

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Aggregate 2023年第5期4卷 1-11页

作者： Norhayati Abu Bakar Nur Nazhifah Yusoff Farah Shahadah Nor Azmi joseph george shapter Australian Institute for Bioengineering and Nanotechnology University of QueenslandSt LuciaAustralia Institute of Microengineering and Nanoelectronics Universiti Kebangsaan MalaysiaBangiMalaysia

Monitoring an infectious disease early using highly sensitive and non-invasive techniques is critical for human ***,the development of surfaceenhanced Raman scattering(SERS)for biological detection ideally fits these medical requirements and is rapidly growing as a powerful diagnostic *** can enhance the Raman signal of the target molecule by more than 106 after the adsorption of the molecule on the plasmonic nanostructured *** review provides an overview of the use of gold and silver nanoparticles in SERS substrate designs,followed by the development of these SERS substrates in severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)detection.

关键词： gold nanostars SARS-CoV-2 SERS silver nanostars

An SPH Framework for Earthquake-Induced Liquefaction Hazard Assessment of geotechnical Structures

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 251-277页

作者： Sourabh Mhaski g.V.Ramana Department of Civil Engineering Indian Institute of Technology DelhiNew Delhi110016India

Earthquake-induced soil liquefaction poses significant risks to the stability of geotechnical structures *** understanding of the liquefaction triggering,and the post-failure large deformation behaviour is essential for designing resilient *** present study develops a Smoothed Particle Hydrodynamics(SPH)framework for earthquake-induced liquefaction hazard assessment of geotechnical *** coupled flowdeformation behaviour of soils subjected to cyclic loading is described using the PM4Sand model implemented in a three-phase,single-layer SPH framework.A staggered discretisation scheme based on the stress particle SPH approach is adopted to minimise numerical inaccuracies caused by zero-energy modes and tensile ***,non-reflecting boundary conditions for seismic analysis of semi-infinite soil domains using the SPH method are *** numerical framework is employed for the analysis of cyclic direct simple shear test,seismic analysis of a level ground site,and liquefaction-induced failure of the Lower San Fernando *** agreement for liquefaction triggering and post-failure behaviour demonstrates that the SPH framework can be utilised to assess the effect of seismic loading on field-scale geotechnical *** present study also serves as the basis for future advancements of the SPH method for applications related to earthquake geotechnical engineering.

关键词： Earthquake seismic liquefaction stress particle PM4Sand smoothed particle hydrodynamics(SPH)

Stepping up after spinal cord injury:negotiating an obstacle during walking

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Neural Regeneration Research 2025年第7期20卷 1919-1929页

作者： Alain Frigon Charly g.Lecomte Department of Pharmacology-Physiology Faculty of Medicine and Health SciencesUniversitéde SherbrookeCentre de recherche du Centre Hospitalier Universitaire de SherbrookeSherbrookeQCCanada

Every day walking consists of frequent voluntary modifications in the gait pattern to negotiate *** spinal cord injury,stepping over an obstacle becomes *** over an obstacle requires sensorimotor transformations in several structures of the brain,including the parietal cortex,premotor cortex,and motor *** information and planning are transformed into motor commands,which are sent from the motor cortex to spinal neuronal circuits to alter limb trajectory,coordinate the limbs,and maintain *** spinal cord injury,bidirectional communication between the brain and spinal cord is disrupted and animals,including humans,fail to voluntarily modify limb trajectory to step over an ***,in this review,we discuss the neuromechanical control of stepping over an obstacle,why it fails after spinal cord injury,and how it recovers to a certain extent.

关键词： biomechanics locomotion neurophysiology obstacle negotiation spinal cord injury

Strange attractors, spiritual interlopers and lonely wanderers:The search for pre-Pangean supercontinents

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geoscience Frontiers 2014年第2期5卷 155-166页

作者： joseph g.Meert Department of geological Sciences 355 Williamson Hall University of Florida

The observation is made that there are very strong similarities between the supercontinents Columbia, Rodinia and Pangea. If plate tectonics was operating over the past 2.5 billion years of Earth history, and dominated by extroversion and introversion of ocean basins, it would be unusual for three superconti-nents to resemble one another so closely. The term＇strange attractor＇ is applied to landmasses that form a coherent geometry in all three supercontinents. Baltica, Laurentia and Siberia form a group of＇strange attractors＇ as do the elements of East gondwana （India, Australia, Antarctica, Madagascar）. The elements of ＂West gondwana＂ are positioned as a slightly looser amalgam of cratonic blocks in all three super-continents and are referred to as ＇spiritual interlopers＇. Relatively few landmasses （the South China, North China, Kalahari and perhaps Tarim cratons） are positioned in distinct locations within each of the three supercontinents and these are referred to as＇lonely wanderers＇. 〈br〉 There may be several explanations for why these supercontinents show such remarkable similarities. One possibility is that modern-style plate tectonics did not begin until the late Neoproterozoic and horizontal motions were restricted and a vertical style of ＇lid tectonics＇ dominated. If motions were limited for most of the Proterozoic, it would explain the remarkable similarities seen in the Columbia and Rodinia supercontinents, but would still require the strange attractors to rift, drift and return to approximately the same geometry within Pangea. 〈br〉 A second possibility is that our views of older supercontinents are shaped by well-known connections documented for the most recent supercontinent, Pangea. It is intriguing that three of the four ＇lonely wanderers＇（Tarim, North China, South China） did not unite until just before, or slightly after the breakup of Pangea. The fourth＇lonely wanderer＇, the Kalahari （and core Kaapvaal） craton has a somewhat unique Archean-age geo

关键词： Columbia Rodinia Pangea Supercontinent Tectonics

Bioelectronic medicine in modulation of cortical spreading depolarization and beyond

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Neural Regeneration Research 2025年第2期20卷 481-482页

作者： Khaled Alok Timothy g.White Chunyan Li Department of Neurosurgery Donald and Barbara Zucker School of Medicine at Hofstra/NorthwellHempsteadNYUSA Translational Brain Research Laboratory The Feinstein Institutes for Medical ResearchManhassetNYUSA

Bioelectronic interventions,specifically trigeminal nerve st imulat ion(TNS),have attracted considerable attention in conditions where cortical spreading depolarizations(CSDs)accompanied by compromised cerebral perfusion may exacerbate neurological *** pharmacological interventions have demonstrated initial potential in addressing CSDs,a standardized treatment approach has not yet been *** objective of this perspective is to explore emerging bioelectronic methodologies for addressing CSDs,particularly emphasizing TNS,and to underscore TNS’s capacity to enhance neurovascular coupling and cerebral perfusion.

关键词： cerebral perfusion electronic