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Science China Materials 2024年第7期67卷 2371-2372页

作者： dewei chu School of Materials Science and Engineering University of New South WalesSydneyNSW 2052Australia

With the escalation of industrialization and population growth,energy and clean water shortages pose an unprecedented threat to sustainable ***,it is imperative to develop green and effective strategies to address these *** this context,solar-driven interfacial water evaporation(SIWE)has emerged as a highly promising low-carbon solution to the water-energy nexus[1].By locating the evaporator at airwater interfaces,heat localization can be achieved,leading to high-efficient water evaporation and freshwater *** significantly,taking advantage of the special conditions during SIWE has opened numerous opportunities for generation of extra electrical power[2,3].Throughout the processes of SIWE,various elements such as photons,waves,capillary flow,evaporation,vapor motions,condensation,and droplet sliding can all be harnessed to produce electricity through photovoltaic,thermoelectric,thermogalvanic,pyroelectric,piezoelectric,triboelectricity and hydrovoltaic effects[3].Extensive research efforts have provided valuable insights for the development of water-electricity cogeneration(WEG)hybrid systems.

关键词： mechanism evaporation piezoelectric

Controlled fabrication of Pr(OH)_3 nanowires for enhanced photocatalytic activities

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Journal of Rare Earths 2019年第1期37卷 60-67,M0004页

作者： Nan Chen Adnan Younis dewei chu Sean Li School of Materials Science and Engineering University of New South Wales

In this report, praseodymium hydroxide Pr(OH)_3 nanowires with different aspect ratios (length to diameter ratios) were synthesized by a facile hydrothermal approach. The variations in alkali concentration during synthesis are found to form different aspect ratios of nanowires. The X-ray diffraction and Raman spectroscopy analysis demonstrate the absence of any impurity phases in as-prepared ***, photocatalytic activities of as-prepared nano wires were evaluated by the degradation of methyl orange (MO). Our findings reveal that the nanowires with larger aspect ratios have higher photocatalytic efficiency than the smaller aspect ratio samples. X-ray photospectroscopy investigations reveal that the samples with higher aspect ratio are found to exhibit more oxygen vacancies as compared to lower aspect ratio samples. The enhanced photocatalytic activities can be attributed to the presence of higher percentage of active crystal facet (100), higher concentration of defects densities and narrower band gap. Thus, Pr(OH)_3 nanowires can be considered as a potential candidate for the application of wastewater treatment and related technologies.

关键词： Praseodymium hydroxide Nanowires Photocatalyst Rare earths

Oxygen-vacancy induced magnetic phase transitions in multiferroic thin films

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npj Computational Materials 2020年第1期6卷 1047-1055页

作者： César Menéndez dewei chu Claudio Cazorla School of Materials Science and Engineering UNSW SydneySydneyNSW 2052Australia

Multiferroics in which giant ferroelectric polarization and magnetism coexist are of tremendous potential for engineering disruptive applications in information storage and energy *** the functional properties of multiferroics are thought to be affected detrimentally by the presence of point defects,which may be abundant due to the volatile nature of some constituent atoms and the high temperatures involved in the synthesis of ***,we demonstrate with theoretical methods that oxygen vacancies may enhance the functionality of multiferroics by radically changing their magnetic interactions in thin ***,oxygen vacancies may restore missing magnetic super-exchange interactions in large axial ratio phases,leading to full antiferromagnetic spin ordering,and induce the stabilization of ferrimagnetic states with considerable net *** theoretical study should help to clarify the origins of long-standing controversies in bismuth ferrite and improve the design of technological applications based on multiferroics.

关键词： magnetic Oxygen transitions

Three-Dimensional Hierarchical Nanostructured Cu/Ni–Co Coating Electrode for Hydrogen Evolution Reaction in Alkaline Media

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Nano-Micro Letters 2015年第4期7卷 347-352页

作者： Ning Wang Tao Hang dewei chu Ming Li State Key Laboratory of Metal Matrix Composites School of Material Science and Engineering Key Laboratory for Thin Film and Microfabrication of Ministry of EducationShanghai Jiao Tong University School of Materials Science & Engineering University of New South Wales

In this work,three-dimensional hierarchical nickel–cobalt alloy coating for hydrogen evolution cathode was fabricated by electrodeposition *** coatings’morphology evolves from sea cucumber-like nanostructure to caterpillar-like one with the increase of cobalt content.A large amount of nanometric‘‘steps,’’served as the active sites for hydrogen evolution reaction,were *** to Tafel polarization measurements,the exchange current density of the as-synthesized coating with hierarchical nanostructure was 21.9 times compared with that of flat nickel *** addition,the hierarchical coating also displayed good electrochemical stability from the galvanostatic test.

关键词： Electrodeposition Ni–Co alloy Hierarchical Hydrogen evolution reaction

A Facile and Template-Free One-Pot Synthesis of Mn_3O_4 Nanostructures as Electrochemical Supercapacitors

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Nano-Micro Letters 2016年第2期8卷 165-173页

作者： Zhenjun Qi Adnan Younis dewei chu Sean Li School of Materials Science and Engineering University of New South Wales

In this paper, we report an effective, simple, and cost-effective strategy of electrochemical deposition to prepare hausmannite Mn_3O_4 thin films for the applications of supercapacitors. Various precursor concentrations and deposition durations were manipulated to tailor the surface morphologies of Mn_3O_4 nanostructures and to optimize their electrochemical performances. The Mn_3O_4 samples prepared at 0.05 M Mn(NO3)2solution for 30 min delivered a large gravimetric specific capacitance of 210 F g-1at a current density of 0.5 A g-1, and a good rate capability over other samples. This superior electrochemical performance may be attributed to the improved electrode conductivity with increased accessible area for electrolytes ions. Furthermore, a nanocomposite film based on Mn_3O_4/carbon foam was fabricated by utilizing the developed optimized conditions. The Mn_3O_4/carbon foam films exhibit an excellent specific capacitance with negligible degradation in retaining specific capacitance values up to 4000 cycles. These findings could further broaden the applications of hausmannite Mn_3O_4 in electrochemical energy storage electrodes.

关键词： Electrochemical deposition Supercapacitors Charge storage

Recent progress of surface coating on cathode materials for high-performance lithium-ion batteries

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Journal of Energy Chemistry 2020年第4期29卷 220-235页

作者： Peiyuan Guan Lu Zhou Zhenlu Yu Yuandong Sun Yunjian Liu Feixiang Wu Yifeng Jiang dewei chu School of Materials Science and Engineering University of New South WalesSydney 2052Australia School of Material Science and Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina College of Metallurgy and Environment Central South UniversityChangsha 410083HunanChina

Lithium-ion batteries (LIB) have received substantial attention in the last 10 years,as they offer great promise as power sources that can lead to the electric vehicle (EV) revolution in the next 5 *** the cathode serves as a key component in LIB,its properties significantly affect the performance of the whole ***,the cathode surface modification based on coating technique has been widely employed to enhance the electrochemical performances by improving the material conductivity,stabilising the physical structure of materials,as well as preventing the reactions between the electrode and *** this work,we reviewed the present of a number of promising cathode materials for Li-ion *** that,we summarized the very recent research progress focusing on the surface coating strategies,mainly including the coating materials,the coating technologies,as well as the corresponding working mechanisms for *** last,the challenges faced and future guidelines for optimizing cathode materials are *** this study,we propose that the structure of cathode is a crucial factor during the selection of coating materials and technologies.

关键词： Lithium-ion battery Cathode Surface Coating Electrochemical performance

Oxide-based cathode materials for rechargeable zinc ion batteries:Progresses and challenges

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Journal of Energy Chemistry 2021年第6期30卷 516-542,I0013页

作者： Yingze Zhou Fandi Chen Hamidreza Arandiyan Peiyuan Guan Yunjian Liu Yuan Wang chuan Zhao Danyang Wang dewei chu School of Materials Science and Engineering The University of New South WalesSydney 2052Australia Laboratory of Advanced Catalysis for Sustainability School of ChemistryThe University of SydneySydney 2006Australia The University of Sydney Nano Institute(Sydney Nano) The University of SydneyNSW 2006Australia School of Material Science and Technology Jiangsu UniversityZhenjiang 212013JiangsuChina School of Chemistry The University of New South WalesSydneyNew South Wales 2052Australia

With the increasing demands for electrical energy storage technologies,rechargeable zinc ion batteries(ZIBs)have been rapidly developed in recent years owing to their high safety,low cost and high energy storage *** cathode is an essential part of ZIBs,which hosts zinc ions and determines the capacity,rate and cycling performance of the *** mainstream cathodes for ZIBs are oxidebased materials with tunnel,layer or 3 D crystal *** this review,we mainly focus on the latest advanced oxide-based cathode materials in ZIBs,including manganese oxides,vanadium oxides,spinel compounds,and other metal oxide based *** addition,the mechanisms of zinc storage and recent development in cathode design have been discussed in ***,current challenges and perspectives for the future research directions of oxide-based cathodes in ZIBs are presented.

关键词： Zinc ion batteries Oxide-based cathode Manganese oxides cathode Vanadium oxides cathode

Recent advances in flexible alkaline zinc-based batteries:Materials,structures,and perspectives

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Journal of Energy Chemistry 2023年第12期87卷 61-88,I0004页

作者： Yanzhe Zhu Peiyuan Guan Renbo Zhu Shuo Zhang Ziheng Feng Mengyao Li Tao Wan Long Hu Yunjian Liu Qin Li Juan Yu dewei chu School of Materials Science and Engineering The University of New South WalesSydneyNSW 2052Australia School of Material Science and Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina Queensland Micro-and Nanotechnology Centre School of Engineering and Built Environment Griffith UniversityBrisbane QLD 4111Australia School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an 710055ShaanxiChina

The development of wearable electronic systems has generated increasing demand for flexible power *** zinc(Zn)-based batteries,as one of the most mature energy storage technologies,have been considered as a promising power source owing to their exceptional safety,low costs,and outstanding electrochemical ***,the conventional alkaline Zn-based battery systems face many challenges associated with electrodes and electrolytes,causing low capacity,poor cycle life,and inferior mechanical *** advances in materials and structure design have enabled the revisitation of the alkaline Zn-based battery technology for applications in flexible ***,we summarize the up-to-date works in flexible alkaline Zn-based batteries and analyze the strategies employed to improve battery ***,we introduce the three most reported cathode materials(including Ag-based,Ni-based,and Co-based materials)for flexible alkaline Zn-based ***,challenges and modifications in battery anodes are ***,the recently advanced gel electrolytes are introduced from their properties,functions as well as advanced ***,recent works and the advantages of sandwich-type,fiber-type and thin film-type flexible batteries are summarized and *** review provides insights and guidance for the design of high-performance flexible Zn-based batteries for next-generation electronics.

关键词： Alkaline zinc-based batteries Cathode materials Anodeissue Gel electrolytes Flexibility Design strategy

Growth and Electrical Properties of Doped ZnO by Electrochemical Deposition

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New Journal of Glass and Ceramics 2012年第1期2卷 13-16页

作者： dewei chu Sean Li 不详

In this work, pure and different metal ions doped ZnO thin films were obtained by a facile electrochemical deposition process. Different morphologies of ZnO, such as nanoplates, nanoparticles, as well as dense film can be obtained by doping Cu2+, In3+, and Al3+, respectively. Besides, the electrical properties of ZnO were also dependent on the doping ions. In this work, only pure ZnO shows resistive switching characteristics, indicating that the defects in ZnO is a key role in inducing resistive switching behaviour.

关键词： ZnO Electrochemcial Deposition

High Areal Capacity and Long Cycle Life Flexible Mild Quasi-Solid-State Ag-Zn Battery with Dendrite-Free Anode

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Energy & Environmental Materials 2024年第1期7卷 34-41页

作者： Yanzhe Zhu Renbo Zhu Fandi Chen Shuo Zhang Yu-Chieh Kuo Peiyuan Guan Mengyao Li Yunjian Liu Zhaojun Han Tao Wan Dawei Wang Caiyun Wang dewei chu School of Materials Science and Engineering The University of New South WalesSydneyNew South Wales 2052Australia School of Material science and Engineering Jiangsu UniversityZhenjiang 212013China School of Chemical Engineering The University of New South WalesSydneyNew South Wales 2052Australia Intelligent Polymer Research Institute AIIMInnovation CampusUniversity of WollongongNorth Wollongong New South Wales 2522Australia

Silver-zinc(Ag-Zn)batteries are a promising battery system for flexible electronics owing to their high safety,high energy density,and stable output ***,poor cycling performance,low areal capacity,and inferior flexibility limit the practical application of Ag-Zn ***,we develop a flexible quasi-solid-state Ag-Zn battery system with superior performance by using mild electrolyte and binder-free *** foam current collector is introduced to impede the growth of Zn dendrite,and the structure of Ag cathode is engineered by electrodeposition and chloridization process to improve the areal *** novel battery demonstrates a remarkable cycle retention of 90%for 200 cycles at 3 mA cm^(-2).More importantly,this binder-free battery can afford a high capacity of 3.5 mAh cm^(-2)at 3 mA cm^(-2),an outstanding power density of 2.42 mW cm^(-2),and a maximum energy density of 3.4 mWh cm^(-2).An energy management circuit is adopted to boost the output voltage of a single battery,which can power electronic ink display and Bluetooth temperature and humidity *** developed battery can even operate under the extreme conditions,such as being bent and sealed in solid *** work offers a path for designing electrodes and electrolyte toward high-performance flexible Ag-Zn batteries.

关键词： binder-free electrodes dendrite-free flexible Ag-Zn battery mild electrolyte quasi-solid-state