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Housing Sulfur in Polymer Composite Frameworks for Li–S Batteries

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Nano-Micro Letters 2019年第1期11卷 282-325页

作者： Luke Hencz Hao Chen Han Yeu Ling Yazhou Wang Chao Lai Huijun Zhao Shanqing Zhang Centre for Clean Environment and Energy Environmental Futures Research Institute School of Environment and Science Griffith University Gold Coast Campus

Extensive efforts have been devoted to the design of micro-, nano-, and/or molecular structures of sulfur hosts to address the challenges of lithium–sulfur(Li–S) batteries, yet comparatively little research has been carried out on the binders in Li–S batteries. Herein, we systematically review the polymer composite frameworks that confine the sulfur within the sulfur electrode, taking the roles of sulfur hosts and functions of binders into consideration. In particular, we investigate the binding mechanism between the binder and sulfur host(such as mechanical interlocking and interfacial interactions), the chemical interactions between the polymer binder and sulfur(such as covalent bonding, electrostatic bonding, etc.), as well as the beneficial functions that polymer binders can impart on Li–S cathodes, such as conductive binders, electrolyte intake, adhesion strength etc. This work could provide a more comprehensive strategy in designing sulfur electrodes for long-life, large-capacity and high-rate Li–S battery.

关键词： Lithium–sulfur battery Sulfur cathode Binder Binding mechanism Polymer composite frameworks

Additive manufacturing of bulk metallic glasses:Fundamental principle,current/future developments and applications

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Journal of Materials Science & Technology 2022年第24期119卷 131-149页

作者： H.R.Lashgari M.Ferry S.Li School of Materials Science and Engineering UNSW Materials and Manufacturing Futures InstituteUniversity of New South WalesSydney NSW 2052Australia

As an advanced manufacturing technique,the advent of additive manufacturing(AM) has opened a new horizon of alternative ways to tackle the challenge of fundamental limits for manufacturing bulk metallic glasses(BMGs).In particular,selective laser melting(SLM),direct metal deposition(DMD),electron beam melting(EBM),and laser foil printing(LFP) have been used for producing BMGs with dimensions larger than what is possible using conventional techniques such as melt-spinning,suction-casting,die-casting,*** this review,we analyzed the current status,issues,structural evolution,and key properties of BMGs based on these emerging AM *** aim is to outline a direction for the development of BMGs using AM technology,establishing a fundamental principle to optimize processing parameters for designing alloy compositions with the high glass-forming ability(GFA),and thermal stability against *** will provide the fundamental science underpinning the future development of AM technology in the fabrication of high-density,defect-free,and completely amorphous alloy components and devices.

关键词： Bulk metallic glass Additive manufacturing Thermal stability Alloying system Process parameters

Climate Change’s Role in Disaster Risk Reduction’s Future:Beyond Vulnerability and Resilience

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International Journal of Disaster Risk Science 2015年第1期6卷 21-27页

作者： Ilan Kelman JC Gaillard Jessica Mercer UCL institute for Risk and Disaster Reduction and UCL institute for Global Health University College London Norwegian institute of International Affairs(NUPI School of Environment The University of Auckland Secure futures

A seminal policy year for development and sustainability occurs in 2015 due to three parallel processes that seek long-term agreements for climate change, the Sustainable Development Goals, and disaster risk *** reason exists to separate them, since all three examine and aim to deal with many similar processes, including vulnerability and resilience. This article uses vulnerability and resilience to explore the intersections and overlaps amongst climate change, disaster risk reduction, and sustainability. Critiquing concepts such as 'return to normal'and 'double exposure'demonstrate how separating climate change from wider contexts is counterproductive. Climate change is one contributor to disaster risk and one creeping environmental change amongst many, and not necessarily the most prominent or fundamental contributor. Yet climate change has become politically important, yielding an opportunity to highlight and tackle the deep-rooted vulnerability processes that cause 'multiple exposure'to multiple threats. To enhance resilience processes that deal with the challenges, a prudent place for climate changewould be as a subset within disaster risk reduction. Climate change adaptation therefore becomes one of many processes within disaster risk reduction. In turn, disaster risk reduction should sit within development and sustainability to avoid isolation from topics wider than disaster risk. Integration of the topics in this way moves beyond expressions of vulnerability and resilience towards a vision of disaster risk reduction’s future that ends tribalism and separation in order to work together to achieve common goals for humanity.

关键词： Adaptation Climate change Disaster risk reduction Mitigation Resilience Vulnerability

Arduino-based low-cost electrical load tracking system with a long-range mesh network

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Advances in Manufacturing 2021年第1期9卷 47-63页

作者： Xin-Lin Wang Bora Ha Frank Andrew Manongi Woo-Kyun Jung Yusufu Abeid Chande Jande Sung-Hoon Ahn Department of Mechanical and Aerospace Engineering Seoul National UniversitySeoulSouth Korea School of Materials Energy water and Environment and Environmental Sciences Nelson Mandela African Institution of Science and TechnologyArushaTanzania water Infrastructure and Sustainable Energy futures Centre Nelson Mandela African Institution of Science and TechnologyArushaTanzania institute of Advanced Machinery and Design Seoul National UniversitySeoulSouth Korea

A system that combines the advantage of the long-range(LoRa)communication method and the structural characteristics of a mesh network for an LoRa mesh network-based wireless electrical load tracking system is *** system demonstrates considerable potential in reducing data loss due to environmental factors in farfield wireless energy *** proposed system can automatically control the function of each node by confirming the data source and eventually adjust the system structure according to real-time monitoring data without manual *** further improve the sustainability of the system in outdoor environments,a standby equipment is designed to automatically ensure the normal operation of the system when the hardware of the base station *** system is based on the Arduino board,which lowers the production cost and provides a simple manufacturing *** conducting a long-term monitoring of a near-field smart manufacturing process in South Korea and the far-field energy consumption of rural households in Tanzania,we have proven that the system can be implemented in most regions,neither confined to a specific geographic location nor limited by the development of local *** system comprises a smart framework that improves the quality of energy ***,the proposed big-data-technology-based power supply policy offers a new approach for prolonging the power supply time of off-grid power plants,thereby providing a guideline for more rural areas with limited power sources to utilize uninterrupted electricity.

关键词： Mesh network Wireless electrical load tracking system Sustainability Off-grid power plant

Design and Development of a Wheel-less Snake Robot with Active Stiffness Control for Adaptive Pedal Wave Locomotion

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Journal of Bionic Engineering 2019年第4期16卷 593-607页

作者： Mohammadali Javaheri Koopaee Sander Bal Christopher Pretty Xiaoqi Chen Mechanical Engineering Department University of CanterburyChristchurch 8041New Zealand Manufacturing futures Research institute Swinburne University of TechnologyHawthorn 3122Australia

This paper presents the design and manufacture process of a wheel-less,modular snake robot with series elastic actuators to reliably measure motor torque signal and investigate the effectiveness of active stiffness control for achieving adaptive snake-like locomotion.A polyurethane based elastic element to be attached between the motor and the links at each joint was designed and manufactured using water jet cutter,which makes the final design easier to develop and more cost-effective,compared to existing snake robots with torque measurement *** reliability of such torque measurement mechanism was examined using simulated dynamical model of pedal wave motion,which proves the efficacy of the design.A distributed control system was also designed,which with the help of an admittance controller,enables active control of the joint stiffness to achieve adaptive snake robot pedal wave locomotion to climb over obstacles,which unlike existing methods does not require prior information about the location of the *** effectiveness of the proposed controller in comparison to open-loop control strategy was verified by the number of *** results show the capability of the robot to successfully climb over obstacles with the height of more than 55%of the diameter of the snake robot modules.

关键词： modular snake robot series elastic actuator active stiffness control pedal wave locomotion adaptive locomotion

Rational catalyst design and mechanistic evaluation for electrochemical nitrogen reduction at ambient conditions

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Green Energy & Environment 2023年第6期8卷 1567-1595页

作者： Muhammad Ibrar Ahmed David Brynn Hibbert Chuan Zhao School of Chemistry University of New South WalesSydney 2052Australia Materials and Manufacturing futures institute University of New South WalesSydney 2052Australia

Ammonia(NH3), a carbon-free hydrogen carrier, is an important commodity for the food supply chain owing to its high energy capacity and ease of storage and transport. The Haber-Bosch process is currently the favored industrial method for large-scale ammonia production but requires energy-intensive and sophisticated infrastructure which hampers its utilization in a sustainable and decentralized system of *** electrochemical nitrogen reduction reaction(eNRR) at ambient conditions holds great potential for sustainable production of ammonia using electricity generated from renewable energy sources such as solar and wind. However, this approach is limited by a low rate of ammonia production with high overpotential and the competing hydrogen evolution reaction(HER). For a better understanding and utilization of eNRR as a sustainable process, insight into rational catalyst design and mechanistic evaluations by a theoretically-directed experimental approach is imperative. Herein, recent insights into rational catalyst design and mechanisms, based on intrinsic and extrinsic catalytic activity are *** the elucidation of basic principles and mechanisms, a framework supplied by theoretical studies that lead to the optimal selection and development of eNRR catalysts is presented. Following a discussion of recently developed electrocatalysts for eNRR, we outline various recently-used theoretical and experimental methodologies to improve the intrinsic and extrinsic catalytic activity of advanced *** review is anticipated to contribute to the development of active, selective, and efficient catalysts for nitrogen reduction.

关键词： Electrocatalysis Nitrogen reduction reaction Ammonia synthesis Theoretical framework Sustainable energy

Ultralight porous poly(vinylidene fluoride)-graphene nanocomposites with compressive sensing properties

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Nano Research 2021年第8期14卷 2620-2629页

作者： Seyed Mohsen Seraji Xing Jin Zhifeng Yi Chunfang Feng Nisa V.Salim institute for Frontier Materials Deakin UniversityWaurn PondsVIC 3216Australia Mechanical Engineering and Product Design Engineering Manufacturing futures Research institute Swinburne University of TechnologyHawthornVIC 3122Australia

Compressible sensors with highly porous features are ideal candidates for sports and wearable *** study demonstrated for the first time,how the crystalline transformation of poly(vinylidene fluoride)(PVDF)influences aerogel formation and also the compressible sensing properties of a graphene *** the present study,two feasible synthesis methods are demonstrated for the fabrication of both PVDF/graphene foams and aerogels with high sensitivity.A three-dimensional network of the PVDF/graphene foams and aerogels is prepared by gelation induced crystallization of PVDF/cyclohexanone by adjusting temperature and ***,PVDF/graphene foams and aerogels with density range of 0.11-0.17 g·cm^(-3) were *** compressive behaviour of PVDF/graphene aerogels was compared with PVDF/graphene foam *** of 20 wt.%graphene in PVDF aerogel improved the compressive strength significantly by 12 *** electromechanical performance of foams and aerogels shows that the PVDF/20G(G represents graphene)foam sample has high sensitivity of 396.7 kPa^(-1) to the pressure higher than 400 kPa,while PVDF/40G aerogels have a sensitivity value of 3.0×10^(-3) kPa^(-1) in pressure range lower than 500 *** results provide new pathways to fabricate porous composite with lighter density with high mechanical and electrical properties.

关键词： porous composite poly(vinylidene fluoride)(PVDF) graphene foam aerogel

α-Fe_2O_3 nanoplates with superior electrochemical performance for lithium-ion batteries

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Green Energy & Environment 2018年第2期3卷 156-162页

作者： Li Xu Yuhui Tian Tiefeng Liu Henan Li Jingxia Qiu Sheng Li Huaming Li Shouqi Yuan Shanqing Zhang institute for Energy Research School of Chemistry and Chemical Engineering Jiangsu University Centre for Clean Environment and Energy Environmental Futures Research Institute and Griffith School of Environment Griffith University Gold Coast Campus

On account of the high theoretical capacity, high corrosion resistance, environmental benignity, abundant availability and low cost, the research on a-Fe_2O_3 has been gradually fastened on as promising anodes materials toward lithium-ion batteries(LIBs). A high-performance anode for LIBs based on α-Fe_2O_3 nanoplates have been selectively prepared. The α-Fe_2O_3 nanoplates can be synthesized with iron ionbased ionic liquid as iron source and template. The α-Fe_2O_3 nanoplates as the anode of LIBs can display high capacity of around1950 mAh g^(-1) at 0.5 A g^(-1) which have exceeded the theoretical capacity of α-Fe_2O_3. On account of unique nanoplate structures and gum arabic as binder, the α-Fe_2O_3 nanoplates also exhibit high rate capability and excellent cycling performance.

关键词： α-Fe2O3 Nanoplates Li-ion battery High reversible capacity Anode

Interactive antimicrobial and toxicity profiles of Pittosporum angustifolium Lodd. extracts with conventional antimicrobials

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Journal of Integrative Medicine 2019年第4期17卷 261-272页

作者： Baxter Blonk Ian E. Cock School of Environment and Science Griffith University Nathan Queensland 4111 Australia Environmental futures Research institute Nathan Campus Griffith University Nathan Queensland 4111 Australia

Objective: Pittosporum angustifolium Lodd. is used to treat a variety of pathogenic diseases and inflamma-tion by Australian aborigines. Practitioners of complementary medicine frequently use herbal medicines concurrently with conventional antibiotics. There is a need to evaluate their effects in combination. Methods: The bacterial growth inhibitory activity of P. angustifolium leaf extracts was assessed against a panel of pathogenic triggers of some autoimmune diseases by standard disc diffusion and liquid dilution minimum inhibitory concentration (MIC) methods. Combinational effects between the extracts and con-ventional antimicrobials were classified using the sum of the fractional inhibitory concentration. Synergistic interactions were further assessed across a range of ratios by isobologram analysis. The tox-icity of the individual samples and combinations was evaluated by Anemia lethality and 3-(4,5-dimethyl thiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium) human dermal fibroblast cell viability assays. Results: P. angustifolium leaf extracts strongly inhibited the growth of several bacterial triggers of autoim-mune diseases. The methanolic, aqueous and ethyl acetate extracts were pwrticularly good inhibitors of Proteus mirabilis and Klebsiella pneumonia growth (MIC=26 and 57 ng/mL respectively). Some combinations of the extracts and conventional antibiotics signiflcantlv potentiated the combined inhibitory activity compared to the individual components. Of the 250 combinations studied, approximately 0.02% showed synergistic interactions, 49.6% were additive, 46.8% showed indifferent interactions and antago-nism occurred in only 0.02% of the combinations. Interestingly, all of the synergistic and antagonistic combinations contained tetracycline as their antibiotic component. Conclusion: P. angustifolium leaf extracts inhibit the growth of pathogenic triggers of some autoimmune diseases. Some extracts also potentiated the activity of co

关键词： Medicinal plants Conventional antimicrobials Synergy Interaction Toxicity