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A review on system and materials for aqueous flexible metal-air batteries

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Carbon Energy 2023年第3期5卷 138-159页

作者： Lixue Jiang Xiaoxuan Luo da‐wei wang School of Chemical Engineering The University of New South WalesSydneyNew South WalesAustralia

The exploration of aqueous flexible metal-air batteries with high energy density and durability has attracted many research efforts with the demand for portable and wearable electronic *** flexible metal-air batteries feature Earth-abundant materials,environmental friendliness,and operational *** part of one metal-air battery can significantly affect the overall *** review starts with the fundamental working principles and the basic battery configurations and then highlights on the common issues and the recent advances in designing high-performance metal electrodes,solid-state electrolytes,and air *** oxygen electrocatalysts with high activity and long-term stability for constructing efficient air electrodes in flexible metal-air batteries are summarized including metal-free carbon-based materials and nonprecious Co/Fe-based materials(alloys,metal oxides,metal sulfites,metal phosphates,metal nitrates,single-site metal-nitrogen-carbon materials,and composites).Finally,a perspective is provided on the existing challenges and possible future research directions in optimizing the performance and lifetime of the flexible aqueous solid-state metal-air batteries.

关键词： activity air electrodes flexible metal-air batteries oxygen electrocatalysts solid‐state electrolytes stability

CK-Modes Clustering Algorithm Based on Node Cohesion in Labeled Property Graph

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Journal of Computer Science & Technology 2019年第5期34卷 1152-1166页

作者： da-wei wang Wan-Qiu Cui Biao Qin School of Information Renmin University of ChinaBeijing 100872China School of Computer Science Beijing University of Posts and TelecommunicationsBeijing 100876China

The designation of the cluster number K and the initial centroids is essential for K-modes clustering algorithm. However, most of the improved methods based on K-modes specify the K value manually and generate the initial centroids randomly, which makes the clustering algorithm significantly dependent on human-based decisions and unstable on the iteration time. To overcome this limitation, we propose a cohesive K-modes (CK-modes) algorithm to generate the cluster number K and the initial centroids automatically. Explicitly, we construct a labeled property graph based on index-free adjacency to capture both global and local cohesion of the node in the sample of the input datasets. The cohesive node calculated based on the property similarity is exploited to split the graph to a K-node tree that determines the K value, and then the initial centroids are selected from the split subtrees. Since the property graph construction and the cohesion calculation are only performed once, they account for a small amount of execution time of the clustering operation with multiple iterations, but significantly accelerate the clustering convergence. Experimental validation in both real-world and synthetic datasets shows that the CK-modes algorithm outperforms the state-of-the-art algorithms.

关键词： cluster number property graph index-free adjacency K-node tree cohesive node

An integrated nanocarbon–cellulose membrane for solid-state supercapacitors

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Science Bulletin 2016年第5期61卷 368-377页

作者： Huabo Liu Yuheng Tian Rose Amal da-wei wang School of Chemical Engineering The University of New South Wales

In this work, we demonstrate the assembly of oxidised carbon nanohybrids(o CNHs) with a commercial cellulose membrane for solid-state supercapacitors. The o CNHs–cellulose membranes were prepared by filtering a water dispersion of o CNHs through the cellulose membrane. The o CNHs were derived from carbon nanotubes via a modified Hummer's method and contained both closed tubes and unzipped tubes, which indicated a hybrid geometrical structure. The solid-state supercapacitor based on the o CNHs–cellulose membranes showed a high areal capacitance of *75 m F/cm^2 at a low scan rate(5 m V/s)and excellent stability for 1,000 cycles.

关键词： Solid-state supercapacitors Carbon nanotubes Membrane

Porous yet dense metal-free electro-materials for compact energy storage

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Science China Materials 2016年第1期59卷 4-5页

作者： da-wei wang Feng Li School of Chemical Engineering University of New South Wales Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences

In the last decades,considerable efforts have been made to increase the gravimetric energy density of *** volumetric energy density has started to receive more attention only recently with the emergence of miniaturize... 详细信息

关键词： gravimetric dense volumetric challenge assembly texture porosity emergence evaporation abundant

Lithium cation-doped tungsten oxide as a bidirectional nanocatalyst for lithium-sulfur batteries with high areal capacity

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Journal of Energy Chemistry 2024年第11期98卷 406-413页

作者： Biying wang Ke Chen Jieying Liang Zhichun Yu da-wei wang Ruopian Fang School of Chemical Engineering The University of New South WalesSydneyNSW 2052Australia Faculty of Materials Science and Energy Engineering Shenzhen University of Advanced TechnologyShenzhen 518055GuangdongChina Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongChina

Lithium-sulfur(Li-S) batteries are promising for high energy-storage applications but suffer from sluggish conversion reaction kinetics and substantial lithium sulfide(Li_(2)S) oxidation barrier,especially under high sulfur ***,we report a Li cation-doped tungsten oxide(Li_(x)WO_(x)) electrocatalyst that efficiently accelerates the S■HLi_(2)S interconversion *** incorporation of Li dopants into WO_(x) cationic vacancies enables bidirectional electrocatalytic activity for both polysulfide reduction and Li_(2)S oxidation,along with enhanced Li^(+) *** conjunction with theoretical calculations,it is discovered that the improved electrocatalytic activity originates from the Li dopant-induced geometric and electronic structural optimization of the Li_(x)WO_(x),which promotes the anchoring of sulfur species at favourable adsorption sites while facilitating the charge transfer ***,Li-S cells with the Li_(x)WO_(x) bidirectional electrocatalyst show stable cycling performance and high sulfur utilization under high sulfur *** approach provides insights into cation engineering as an effective electrocatalyst design strategy for advancing high-performance Li-S batteries.

关键词： Cation engineering Electrocatalysis Polysulfide conversion Lithium sulfide oxidation Lithium-sulfur batteries

Enhanced Electroactivity of Facet-Controlled Co3O4 Nanocrystals for Enzymeless Biosensing

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Journal of Materials Science & Technology 2016年第1期32卷 24-27页

作者： Kuang-HsuWu Xue Leng Ian R. Gentle da-wei wang School of Chemistry and Molecular Biosciences the University of Queensland Brisbane QLD 4072 Australia School of Chemical Engineering the University of New South Wales Sydney NSW 2052 Australia

In this work, we report enhanced electroactivity of Co304 nanocrystals （nanocubes, NCs and truncated nano-octahedra, TNO） on the exposed {111} facets as compared to the {001} facets in relation to the surface density and the activity of the octahedral Com species. Transmission electron microscopy, X-ray powder diffraction, X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy were em- ployed to characterize the crystal facets and materials properties. The enhanced electroactivity of {111 } crystal facets was evaluated by cyclic voltammetry and amperometric titration. Our results indicate that the {111 } facets in TNO has a better electroactivity for enzymeless glucose sensing with a decent glucose sensitivity of 32.54 μA （mmol/L）-1 cm-2.

关键词： Co304 nanoparticles Crystal facets Glucose sensing

Regulating ion transport behaviors toward dendrite-free potassium metal batteries:recent advances and perspectives

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Rare Metals 2024年第4期43卷 1435-1460页

作者： Lu-Kang Zhao Xuan-Wen Gao Tian-Zhen Ren da wang da-wei wang Zhao-Meng Liu Hong Chen Wen-Bin Luo School of Metallurgy Northeastern UniversityShenyang110819China School of Chemical Engineering The University of New South WalesSydneyNSW2052Australia

With abundant potassium resources and high capacity,potassium metal batteries(PMBs)present a compelling option for the next generation of energy storage ***,PMBs suffer from an unstable anode interface caused by uncontrolled dendrite growth,which results in unsatisfactory cyclability and safety *** investigations suggest that significant progress has been made in enhancing the interfacial stability of *** various effective strategies for stabilizing interfaces can ultimately be attributed to the regulation of the sluggish ion transfer kinetics and irregular deposition,i.e.,the arrangement of ion transport behaviors at the *** modulation of ions transport rate and ions deposition directions makes it possible to obtain a dendrite-free and smooth deposition ***,the influencing factors and action mechanism of K^(+)interface transport behaviors are discussed to understand the nature of material design for constructing stable anode interfaces,including regulating the solvation and desolvation structures,accelerating K^(+)transport kinetics and controlling K^(+)deposition *** addition,the deficiencies and prospects of the research on electrolyte,separators and designed electrode involved in the manufacturing and testing and ion transport process of PMBs are *** review is expected to provide some possible directions for constructing dendrite-free interfaces in advanced PMBs-related research and offer significant insights for prospective experimental research and commercial applications.

关键词： Ion transport rate Ion transport direction Interface Potassium metal batteries Dendrites growth

Previously unexplored etiology for femoral head necrosis:Metagenomics detects no pathogens in necrotic femoral head tissue

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World Journal of Clinical Cases 2022年第7期10卷 2138-2146页

作者： Chao Liu wei Li Chao Zhang Feng Pang da-wei wang Department of Orthopedics Liaocheng People's HospitalLiaocheng 252000Shandong ProvinceChina Department of Orthopedics Shandong The First Medical UniversityTaian 271016Shandong ProvinceChina Department of Clinical Laboratory Liaocheng People's HospitalLiaocheng 252000Shandong ProvinceChina

BACKGROUND Osteonecrosis of the femoral head(ONFH)is a frequent and refractory disease whose pathogenesis has not yet been *** and other factors that reduce the local blood supply can lead to bone *** To aim of this study was to assess the relationship of ONFH with bone infection by use of metagenomic *** Twelve patients with idiopathic ONFH and 12 comparable controls who were undergoing hip arthroplasty were followed up in *** femoral head specimens were collected for bacterial and fungal cultures using standard *** specimens were subjected to preliminary processing,and metagenomics sequencing of microorganisms was performed.A one-way analysis of variance was used to compare bacterial species in the two *** Bacterial and fungal cultures exhibited no evidence of microbial growth in all isolated necrotic femoral head *** thus performed metagenomic sequencing and classified the species as suspected pathogens or suspected background microorganisms based on known bacterial *** was no evidence of viruses,fungi,parasites,*** complex,or mycoplasma/*** were also no significant differences in suspected pathogens or suspected background microorganisms(P>0.05).CONCLUSION Although we found no pathogens specific for ONFH in necrotic femoral head tissue,our research provides a foundation for future research on the metagenomics of bone pathogens.

关键词： Idiopathic Osteonecrosis of the femoral head Sequencing Pathogens

Strigolactone agonists/antagonists for agricultural applications:New opportunities

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Advanced Agrochem

Advanced Agrochem 2022年第1期1卷 61-72页

作者： da-wei wang Zhen Xi State Key Laboratory of Elemento-Organic Chemistry National Pesticide Engineering Research CenterFrontiers Science Center for New Organic MatterCollege of ChemistryNankai UniversityTianjin300071PR China Haihe Laboratory of Sustainable Chemical Transformations Tianjin300192PR China

Strigolactones(SLs)are a new class of phytohormones that not only act as signalling molecules with external rhizospheric fungus and stimulate the seed germination of root parasite weeds,but also regulate many aspects of plant development,such as regulating root and shoot *** intriguing properties,which in turn,make SLs great potency for applications in *** this review,we highlight the recent advancements in applying SLs and their agonists or antagonists for agricultural applications,including controlling root parasite weeds,improving plant nutrient availability,and regulating abiotic stress *** many SL agonists or antagonists have been synthesized since the first isolation of SL,strigol,in 1966,there is still no commercial application of this class of *** also present an overview of the possible challenges for the practical application of SL agonists or antagonists.

关键词： Strigolactone Strigolactone agonist Strigolactone antagonist Seed germination Plant hormone