检索结果-南通市图书馆

Mesocrystal Co3O4 nanoplatelets as high capacity anode materials for Li-ion batteries

在线全文

学校读者我要写书评

暂无评论

Nano Research 2014年第5期7卷 794-803页

作者： dawei su Shixue Dou Guoxiu Wang Institute for superconducting & Electronic Materials University of Wollongong Wollongong NSW 2522 Australia Centre for Clean Energy Technology School of Chemistry and Forensic Science University of Technology Sydney Broadway Sydney NSW 2007 Australia

Faceted crystals with exposed highly reactive planes have attracted intensive investigations for applications. Herein, we demonstrate a general synthetic method to prepare mesocrystal Co3O4 with predominantly exposed {111} reactive facets by the in situ thermal decomposition from Co（OH）2 nanoplatelets. The mesocrystal feature was identified by field emission scanning electron microscopy, transmission electron microscopy, selected area electron diffraction, and N2 isotherm analyses. When applied as anode material in lithium-ion batteries, mesocrystal Co3O4 nanoplatelets delivered a high specific capacity and an outstanding high rate performance. The superior electrochemical performance should be ascribed to the predominantly exposed {111} active facets and highly accessible surfaces. This synthetic strategy could be extended to prepare other mesocrystal functional nanomaterials.

关键词： msoporous material faceted crystal anode materiallithium ion battery

Optimal Intelligence Planning of Wind Power Plants and Power System Storage Devices in Power Station Unit Commitment Based

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy Engineering 2022年第5期119卷 2081-2104页

作者： Yuchen Hao dawei su Zhen Lei Control Center of State Grid of Jiangsu Electric Power Co. Ltd.Nanjing210000China

Renewable energy sources(RES)such as wind turbines(WT)and solar cells have attracted the attention of power system operators and users alike,thanks to their lack of environmental pollution,independence of fossil fuels,and meager marginal *** the introduction of RES,challenges have faced the unit commitment(UC)problem as a traditional power system optimization problem aiming to minimize total costs by optimally determining units’inputs and outputs,and specifying the optimal generation of each *** output power of RES such as WT and solar cells depends on natural factors such as wind speed and solar irradiation that are riddled with *** a result,the UC problem in the presence of RES faces *** grid consumed load is not always equal to and is randomly different from the predicted values,which also contributes to uncertainty in solving the aforementioned *** current study proposes a novel two-stage optimization model with load and wind farm power generation uncertainties for the security-constrained UC to overcome this *** new model is adopted to solve the wind-generated power uncertainty,and energy storage systems(ESSs)are included in the problem for further *** problem is written as an uncertain optimization model which are the stochastic nature with security-constrains which included undispatchable power resources and storage *** solve the UC programming model,a hybrid honey bee mating and bacterial foraging algorithm is employed to reduce problem complexity and achieve optimal results.

关键词： Unit commitment security-constrained programming wind farms uncertainty honey bee mating algorithm bacterial foraging algorithm

Hierarchical sodium-rich Prussian blue hollow nanospheres as high-performance cathode for sodium-ion batteries

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2018年第8期11卷 3979-3990页

作者： Xiao Tang Hao Liu dawei su Peter H. L. Notten Guoxiu wang Center for Clean Energy Technology Faculty of Science University of Technology Sydney Sydney NSW 2007 Australia Department of Chemical Engineering and Chemistry Eindhoven University of Technology Eindhoven 5600 MB The Netherlands Fundamental Electrochemistry (IEKg) Forschungszentrum Julich Julich D-52425 Germany

Recently, Prussian blue and its analogues （PBAs） have attracted tremendous attention as cathode materials for sodium-ion batteries because of their good cycling performance, low cost, and environmental friendliness. However, they still suffer from kinetic problems associated with the solid-state diffusion of sodium ions during charge and discharge processes, which leads to low specific capacity and poor rate performances. In this work, novel sodium iron hexacyanoferrate nanospheres with a hierarchical hollow architecture have been fabricated as cathode material for sodium-ion batteries by a facile template method. Due to the unique hollow sphere morpholog~ sodium iron hexacyanoferrate nanospheres can provide large numbers of active sites and high diffusion dynamics for sodium ions, thus delivering a high specific capacity （142 mAh/g）, a superior rate capabili, and an excellent cycling stability. Furthermore, the sodium insertion/extraction mechanism has been studied by in situ X-ray diffraction, which provides further insight into the crystal structure change of the sodium iron hexacyanoferrate nanosphere cathode material during charge and discharge processes.

关键词： sodium-rich sodium ironhexacyanoferrate hollow nanospheres cathode sodium-ion batteries

Recent developments of aprotic lithium-oxygen batteries： functional materials determine the electrochemical performance

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science Bulletin 2017年第6期62卷 442-452页

作者： Xin Guo Bing sun dawei su Xiaoxue Liu Hao Liu Yong Wang Guoxiu Wang Centre for Clean Energy Technology University of Technology Sydney Sydney NSW 2007 Australia Department of Chemical Engineering School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China

Lithium oxygen battery has the highest theoretical capacity among the rechargeable batteries and it can reform energy storage technology if it comes to commercialization. However,many critical challenges,mainly embody as low charge/discharge round-trip efficiency and poor cycling stability,impede the development of Li-O_2 batteries. The electrolyte decomposition,lithium metal anode corrosion and sluggish oxygen reaction kinetics at cathode are all responsible for poor electrochemical ***,the catalytic cathode of Li-O_2 batteries,playing a crucial role to reduce the oxygen during discharging and to decompose discharge products during charging,is regarded as a breakthrough point that has been comprehensive investigated. In this review,the progress and issues of electrolyte,anode and cathode,especially the catalysts used at cathode,are systematically summarized and *** the perspectives toward the developments of a long life Li-O_2 battery are also presented at last.

关键词： Li-O2 battery Lithium metal anode OER/ORR catalyst Hierarchically porous cathode Parasitic reactions

Metal-Free 2D/2D van der Waals Heterojunction Based on Covalent Organic Frameworks for Highly Efficient Solar Energy Catalysis

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2023年第9期15卷 15-30页

作者： Ge Yan Xiaodong sun Yu Zhang Hui Li Hongwei Huang Baohua Jia dawei su Tianyi Ma Institute of Clean Energy Chemistry Key Laboratory for Green Synthesis and Preparative Chemistry of Adv.Mater.College of ChemistryLiaoning UniversityShenyang 110036People’s Republic of China School of Science RMIT UniversityMelbourneVIC 3000Australia Faculty of Science School of Mathematical and Physical SciencesUniversity of Technology SydneySydneyNSW 2007Australia Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of GeosciencesBeijing 100083People’s Republic of China

Covalent organic frameworks(COFs)have emerged as a kind of rising star materials in ***,their photocatalytic activities are restricted by the high photogenerated electron-hole pairs recombination ***,a novel metal-free 2D/2D van der Waals heterojunction,composed of a two-dimensional(2D)COF with ketoenamine linkage(TpPa-1-COF)and 2D defective hexagonal boron nitride(h-BN),is successfully constructed through in situ solvothermal *** from the presence of VDW heterojunction,larger contact area and intimate electronic coupling can be formed between the interface of TpPa-1-COF and defective h-BN,which make contributions to promoting charge car-riers *** introduced defects can also endow the h-BN with porous structure,thus providing more reactive ***,the TpPa-1-COF will undergo a structural transformation after being integrated with defective h-BN,which can enlarge the gap between the conduction band position of the h-BN and TpPa-1-COF,and suppress electron backflow,corroborated by experimental and density functional theory calculations ***,the resulting porous h-BN/TpPa-1-COF metal-free VDW heterojunction displays out-standing solar energy catalytic activity for water splitting without co-catalysts,and the H_(2) evolution rate can reach up to 3.15 mmol g^(−1) h^(−1),which is about 67 times greater than that of pristine TpPa-1-COF,also surpassing that of state-of-the-art metal-free-based photocatalysts reported to *** particular,it is the first work for constructing COFs-based heterojunctions with the help of h-BN,which may provide new avenue for designing highly efficient metal-free-based photocatalysts for H_(2) evolution.

关键词： Covalent organic frameworks 2D/2D van der Waals heterojunction Metal-free photocatalyst

A functional hyperbranched binder enabling ultra-stable sulfur cathode for high-performance lithium-sulfur battery

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2020年第11期29卷 63-72页

作者： Xiang Luo Xianbo Lu Xiaodong Chen Ya Chen Chunyang Yu dawei su Guoxiu Wang Lifeng Cui School of Materials Science and Engineering Dongguan University of TechnologyDongguan 523808GuangdongChina Center for Clean Energy Technology School of Mathematical and Physical ScienceFaculty of ScienceUniversity of Technology SydneyNSW 2007Australia R&D Center Shanghai Kingfa Sci.&Tech.Co.Ltd.Shanghai 201714China Department of Applied Chemistry School of ScienceXi'an Jiaotong UniversityXi'an 710049ShaanxiChina School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China School of Chemistry&Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Binders are of vital importance in stabilizing the cathodes to enhance the cycling stability of lithiumsulfur(Li-S) batteries. However, conventional binders are typically confronted with the drawback of inability for adsorbing lithium polysulfide(Li PS), thus resulting in severe active material losing and rapid capacity fading. Herein, a novel water-soluble hyperbranched poly(amidoamine)(HPAA) binder with controllable hyperbranched molecular structure and abundant amino end groups for Li-S battery is designed and fabricated, which can improve efficient adsorption for Li PS and stability of the sulfur cathodes. Besides, the strong intermolecular hydrogen bonds in HPAA binder can contribute to the structural stability of S cathode and integration of the conductive paths. Therefore, the Li-S battery with this functional binder exhibits excellent cycle performance with a capacity retention of 91% after 200 cycles at 0.1 *** at a high sulfur loading of 5.3 mg cm-2, a specific capacity of 601 mA h g-1 can also be *** functional theory(DFT) calculation further demonstrates that the enhanced electrochemical stability derives from the high binding energy between amino groups and LiP S and the wide electrochemical window(6.87 e V) of HPAA molecule. Based on the above all, this functional polymer will lighten a new species of binders for eco-friendly sulfur cathodes and significantly promote the practical applications of high-performance Li-S batteries.

关键词： Functional binder Hyperbranched polymer sulfur cathode Polysulfide adsorption Lithium-sulfur battery

Online coherence identification using dynamic time warping for controlled islanding

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2019年第1期7卷 38-54页

作者： Hasan Ul BANNA Zhe YU Di SHI Zhiwei WANG dawei su Chunlei XU Sarika Khushalani SOLANKI Jignesh M.SOLANKI GEIRI North America Department of CSEE West Virginia University Grid Dispatch Center State Grid Jiangsu Electric Power Company

Controlled islanding is considered to be the last countermeasure to prevent a system-wide blackout in case of cascading *** splits the system into self-sustained islands to maintain transient stability at the expense of possible loss of *** coherence identification is critical to controlled islanding scheme as it helps identify the optimal cut-set to maintain the transient stability of the post-islanding *** paper presents a novel approach for online generator coherency identification using phasor measurement unit(PMU) data and dynamic time warping(DTW).Results from the coherence identification are used to further cluster non-generator buses using spectral clustering with the objective of minimizing power flow *** proposed approach is validated and compared to existing methods on the IEEE39-bus system and WECC 179-bus system, through which its advantages are demonstrated.

关键词： Coherence identification Constrained spectral clustering Controlled islanding Dynamic time warping Phasor measurement unit measurement

Decade Milestone Advancement of Defect-Engineered g-C_(3)N_(4) for Solar Catalytic Applications

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第4期16卷 153-218页

作者： Shaoqi Hou Xiaochun Gao Xingyue Lv Yilin Zhao Xitao Yin Ying Liu Juan Fang Xingxing Yu Xiaoguang Ma Tianyi Ma dawei su School of Mathematical and Physical Sciences Faculty of ScienceUniversity of Technology Sydney(UTS)SydneyNSW 2007Australia Laboratory of Plasma and Energy Conversion School of Physics and Optoelectronic EngineeringLudong University186 Middle Hongqi RoadYantai 264025People’s Republic of China School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083People’s Republic of China Department of Chemistry The University of Tokyo7‑3‑1 HogoBunkyoTokyoJapan School of Science STEM CollegeRMIT UniversityMelbourneVIC 3000Australia

Over the past decade, graphitic carbon nitride(g-C_(3)N_(4)) has emerged as a universal photocatalyst toward various sustainable carbo-neutral technologies. Despite solar applications discrepancy, g-C_(3)N_(4) is still confronted with a general fatal issue of insufficient supply of thermodynamically active photocarriers due to its inferior solar harvesting ability and sluggish charge transfer dynamics. Fortunately, this could be significantly alleviated by the “all-in-one” defect engineering strategy, which enables a simultaneous amelioration of both textural uniqueness and intrinsic electronic band structures. To this end, we have summarized an unprecedently comprehensive discussion on defect controls including the vacancy/non-metallic dopant creation with optimized electronic band structure and electronic density, metallic doping with ultraactive coordinated environment(M–N_(x), M–C_(2)N_(2), M–O bonding), functional group grafting with optimized band structure, and promoted crystallinity with extended conjugation π system with weakened interlayered van der Waals interaction. Among them, the defect states induced by various defect types such as N vacancy, P/S/halogen dopants, and cyano group in boosting solar harvesting and accelerating photocarrier transfer have also been emphasized. More importantly, the shallow defect traps identified by femtosecond transient absorption spectra(fs-TAS) have also been highlighted. It is believed that this review would pave the way for future readers with a unique insight into a more precise defective g-C_(3)N_(4) “customization”, motivating more profound thinking and flourishing research outputs on g-C_(3)N_(4)-based photocatalysis.

关键词： Defect engineering g-C_(3)N_(4) Electronic band structures Photocarrier transfer kinetics Defect states

TPE based aggregation induced emission fluorescent sensors for viscosity of liquid and mechanical properties of hydrogel

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2022年第1期33卷 252-256页

作者： Na Wang Hang Yao Qi Tao Jing sun Hao Ma Yang Wang ChengCheng Zhou Hongying Fan Hongxia Shao Aijian Qin dawei su Chenyin Wang Hui Chong School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225009China Testing center of Yangzhou University Yangzhou 225009China Ministry of Education Key Lab for Avian Preventive Medicine Key Laboratory of Jiangsu Preventive Veterinary MedicineCollege of Veterinary MedicineYangzhou UniversityYangzhou 225009China Center for Clean Energy Technology School of Mathematical and Physical ScienceFaculty of ScienceUniversity of Technology SydneySydney NSW 2000Australia

Two amphiphilic TPE E/Z isomers with aggregation induced emission(AIE)property have been synthesized and *** logarithmic fluorescent intensity of the two molecules was in positive relationship with logarithmic viscosity of *** note,the Z-TPE isomer exhibited more sensitivity in the viscosity of liquid sensing in comparison with the corresponding E-TPE counterpart(around 1.80 folds).Furthermore,two molecules could be used as fluorescent sensors for mechanical properties(viscosity and storage modulus)of hydrogel as *** addition,two sensors displayed low cytotoxicity in normal tissue cell line(L929)within the concentration range of 2–10μmol/*** results potentially promised their applications as fluorescent sensors for mechanical properties in the fields of biological and biomedical.

关键词： TPE AIE Viscosity of liquid Mechanical property of hydrogel Fluorescent sensing