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Solute segregations at the space-charge layers of stabilized zirconia: An opportunity for ameliorating conductivity

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 1996年第5期16卷 575-578页

作者： Guo, X State Key Laboratory for Synthesis and Processing of Advanced Materials Wuhan University of Technology Wuhan Hubei Province 430070 People's Republic of China

According to a space-charge theory analysis, the space-charge potential of YSZ is negative, which corresponds to a V-0(..) depletion in the space-charge layer. An extremely low grain-boundary conductivity of the high-purity YSZ is thus explained. Under the condition that the bulk property is ensured by the optimal dopant additions, an idea of increasing the grain-boundary conductivity by the segregations of solutes with positive effective charge is put forward. The most likely driving force for the segregations is the elastic strain energy. And the feasibility of this idea has been proved by some experimental and theoretical results.

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Macroscopic synthesis of ultrafine N–doped carbon nanofibers for superior capacitive energy storage

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Science Bulletin 2019年第21期64卷 1617-1624页

作者： Qiang Yu Jianshuai Lv Zhenhui Liu Ming Xu Wei Yang Kwadwo Asare Owusu Liqiang Mai Dongyuan Zhao Liang Zhou State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China International School of Materials Saence and Engineering Wuhan University of TechnologyWuhan 430070China

Carbon nanofibers(CNFs)with excellent electric conductivity and high surface area have attracted immense research interests in ***,the macroscopic production of CNFs still remains a great ***,ultrafine N–doped CNFs(N–CNFs)with a diameter of$20 nm are synthesized through a simple and scalable sol-gel method based on the self-assembly of phenolic resin and cetyltrimethylammonium *** employed in aqueous supercapacitors,the obtained activated N–CNFs manifest a high gravimetric/areal capacitance(380 Fg-1/1.7 Fcm-2)as well as outstanding rate capability and cycling ***,the activated N–CNFs also demonstrate excellent capacitive performance(330 Fg-1)in flexible quasi-solid-state *** remarkable electrochemical performance as well as the easy and scalable synthesis makes the N–CNFs a highly promising electrode material for supercapacitors.

关键词： Macroscopic synthesis Carbon Nanofibers N–doping Supercapacitor

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Correlative Mn-Co catalyst excels Pt in oxygen reduction reaction of quasi-solid-state zinc-air batteries

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Nano Research 2024年第5期17卷 4118-4124页

作者： Tingting Wang Jincheng Huang Wei Sang Cai Zhou Bohan Zhang Wei Zhu Kang Du Zongkui Kou Shengxiang Wang School of Mathematical and Physical Sciences Wuhan Textile UniversityWuhan 430200China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Zn-air batteries(ZABs)as a class of promising energy storage setups are generally powered by efficient and robust catalysts at the oxygen-involving *** the existing non-noble catalysts have outperformed noble Pt benchmark in the alkaline liquid-state ZABs,to the best of our knowledge few have excelled Pt in quasi-solid-state(QSS)***,we found that an integrated Mn-Co cathode derived from the bimetallic Mn/Co metal organic frameworks generates a 1.4-fold greater power density in the QSS ZABs than a Pt cathode while its power density in liquid-state ZABs is only 0.8-fold of the ***,such Mn-Co catalyst delivers high-rate oxygen reduction reaction(ORR)capability with half-wave potential of 0.84 *** in-depth characterizations and analyses have demonstrated that the Co and Mn species show the specific affinity towards H_(2)O and O_(2),respectively,synergizing the ORR process in the water-deficient environment of QSS *** work has enlightened the rational design of non-noble metal catalysts to improve the power density of QSS ZABs.

关键词： non-noble metal catalysts zinc-air battery quasi-solid-state synergistic effect

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Encapsulation of selenium sulfide in double-layered hollow carbon spheres as advanced electrode material for lithium storage

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Nano Research 2016年第12期9卷 3725-3734页

作者： Hongwei Zhang Liang Zhou Xiaodan Huang Hao Song Chengzhong Yu Australian Institute for Bioengineering and Nanotechnology The University of Queensland Brisbane QLD 4072 Australia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Selenium sulfide/double-layered hollow carbon sphere （SeS2/DLHC） composites have been designed as high-performance cathode materials for novel Li-SeS2 batteries. In the constructed composite, SeS2 is predominantly encapsulated in the interlayer space of DLHCs with a high loading of 75% （weight percentage） and serves as the active component for lithium storage. The presence of Se in the composite and the carbon framework not only alleviate the shuttling of polysulfide, but also improve the conductivity of electrodes. Migration of active materials from the interlayer void to the hollow cavity of DLHCs after cycling, which further mitigates the loss of active materials and the shuttle effect, is observed. As a result, the SeS2/DLHC composite delivers a high specific capacity （930 mA.h.g-1 at 0.2 C） and outstanding rate capability （400 mA.h.g-1 at 6 C）, which is much better than those of SeS2/single-layered hollow carbon sphere, Se/DLHC, and S/DLHC composites. Notably, the SeS2/DLHC composite shows an ultralong cycle life with 89% capacity retention over 900 cycles at 1 C, or only 0.012% capacity decay per cycle. Our study reveals that both SeS2 and the double-layered structures are responsible for the excellent electrochemical performance.

关键词： selenium sulfide double-layered hollowcarbon cathode materials lithium storage

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Preface to Special Issue on Photocatalysis for celebrating the 20^(th) anniversary of Professor Jimmy C. Yu's return to Hong Kong and leading photocatalytic research there

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Chinese Journal of Catalysis 2015年第12期36卷 2047-2048页

作者：余家国林隽 State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Department of Chemistry Renmin University of China

It is a pleasure to dedicate this special issue of Chinese Journal of Catalysis（CJC）to *** ***,Choh-Ming Li Professor of Chemistry at The Chinese University of Hong *** is to celebrate the 20th anniversary of his re... 详细信息

关键词： pleasure Jimmy return photocatalytic celebrate distinguished helping anniversary strive

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Mechanical Properties of Boron Carbide/Reducedgraphene-oxide Composites Ceramics

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Journal of Wuhan University of technology(materials Science) 2022年第6期37卷 1087-1095页

作者： LIAO Xusheng GAO Li WANG Xin ZHANG Fan LIU Lisheng REN Lin School of Science Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Reduced graphene oxide(rGO)enhanced B_(4)C ceramics was prepared by SPS sintering,the enhancement effect of rGO on the microstructure and mechanical properties of composites was studied through experiments and numerical *** results show that the composite with 2wt%rGO has the best comprehensive mechanical *** with pure boron carbide,vickers hardness and bending strength are increased by 4.8%and 21.96%,*** fracture toughness is improved by 25.71%.The microstructure observation shows that the improvement of mechanical properties is mainly attributed to the pullout and bridge mechanism of rGO and the crack *** on the cohesive force finite element method,the dynamic crack growth process of composites was *** energy dissipation of B_(4)C/rGO multiphase ceramics during crack propagation was calculated and compared with that of pure boron carbide *** results show that the fracture energy dissipation can be effectively increased by adding graphene.

关键词： boron carbide matrix composites graphene oxide mechanical property cohesive finite element method

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Multifunctional 3D electrodes for tunable high-performance hybrid zinc batteries

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Journal of materials Science & technology 2024年第11期178卷 155-161页

作者： Yiming Chen Minxuan Zhou Junpeng Wu Xidan Xiao Lin Xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

The high energy density and long cycling life of zinc-based batteries are restricted by the single electro-chemical reaction *** improve the electrochemical performance of batteries,electrode materials,electrolytes and membranes are regularly modified,while the construction of battery systems is often ***,a multifunctional electrode was prepared via 3D printing,which successfully coupled the metal oxide/hydroxide-zinc battery(MZB)reaction and rechargeable zinc-air battery(RZAB)*** ultrathick hierarchical 3D electrode provided a tunable capacity for the MZB system,which enabled the possibility for feasible output regulation of this hybrid *** active material NiCoLDH was discov-ered to undergo structure reconstruction during cycling,which revealed the capacity fading *** delicate system design and discovery ensured a high-performance battery configuration and revealed the corresponding mechanism,opening a new avenue for developing high-performance zinc batteries.

关键词： Zinc battery Multifunctional electrode 3D printing Hierarchical 3D structure

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Bioresponsive fluorescent probes active in the second near-infrared window

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iRADIOLOGY 2023年第1期1卷 36-60页

作者： Yuqin Chen Jie Chen Baisong Chang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanChina

Emerging stimuli-responsive composite probes active in the second nearinfrared window(NIR-II,1000–1700 nm)hold vast potential for improving in vivo imaging performance with minimized noise *** interactions among external irradiation,shell species,and the emissive core are key factors in the design of smart *** external irradiation provides energy for shell species and the emissive core to generate intense NIR-II fluorescence signals,while the energy transfer process hinders NIR-II emission in the inner structure of smart composite ***,if pathophysiological stimuli interrupt the above processes,then NIR-II fluorescence signals are *** review covers NIR-II imaging based on diverse smart composite NIR-II fluorescent probes responding to various biological stimuli,including ONOO−,overexpressed reactive sulfur species,abnormally expressed enzymes,and abnormal levels of physiological ***,to appreciate these advances,the challenges and perspectives of stimuliresponsive composite NIR-II probes are highlighted.

关键词： composite engineering second near-infrared window smart probe stimulus sensitivity pathophysiological microenvironment

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In-situ Preparation of TiB_2-TiB-Ti Functionally Graded materials by Improved Sintering Process

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Journal of Wuhan University of technology(materials Science) 2015年第4期30卷 710-714页

作者：刘国玺 LI Kezhi ZHANG Jinyong 张帆 School of Materials Science Northwestern Polytechinical University Ningbo Branch of Ordnance Science Institute of China State Key Lab of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology

An improved multi-step sintering process was used to in-situ prepare TiB2-TiB-Ti FGMs. According to the sintering temperatures, the functionally graded materials （FGMs） were divided into three sections. After sintering at a proper temperature, the three sections were sintered together in turn. The experimental results showed that there were no obvious pores and cracks in the whole TiB2-TiB-Ti FGMs, and no delamination was found in the impacting test with good performance features, which indicated that there were no interface effects in FGMs during penetration, so that the TiB2-TiB-Ti FGMs were an ideal FGM.

关键词： FGMs TiB2 Ti Fabrication

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Preparation,Microstructure and Properties of NiO-Cr_2O_3-TiO_2 Infrared Radiation Coating

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Journal of materials Science & technology 2009年第5期25卷 695-698页

作者： Wu Chen Weiping Ye Xudong Cheng Wei Duan Fang Mao Deliang Li State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China College of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China

The spherical agglomerated particles were fabricated by spray drying with the powders of NiO, Cr2O3 and TiO2. Plasma spray power, which has good property of flowability, was acquired by heat treatment from the particles at 1200℃ in the reducing atmosphere. Dark and uniform coating of More than 50 μm thick was deposited on the copper sheet substrate by plasma spraying. It is found that the infrared normal total emissivity of the coating is up to 0.91 at 600℃ by infrared radiation testing. The X-ray diffraction analysis shows that the formation of （Cr0.88Ti0.12）2O3 and spinel structural NiCr2O4 in the coating is the main reason for high efficient infrared radiation, and the phase structure and performance of coating is favorable under the thermal cycle between room temperature and 600℃.

关键词： Spray drying Agglomerated particles Plasma spraying Normal total emissivity

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