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3D Nitrogen-Doped Graphene Encapsulated Metallic Nickel-Iron Alloy Nanoparticles for Efficient Bifunctional Oxygen Electrocatalysis

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CHEMISTRY-A EUROPEAN JOURNAL 2020年第18期26卷 3896-3896页

作者： Wang, Zhaoyang Liao, Xiaobin Lin, Zifeng Huang, Fuzhi Jiang, Yalong Owusu, Kwadwo Asare Xu, Lin Liu, Ziang Li, Jiantao Zhao, Yan Cheng, Yi-Bing Mai, Liqiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 P. R. China State Ke

Constructing high-efficient, low-cost and robust oxygen electrocatalyststoward rechargeable Zn-air batteries remains a big challenge. Herein, metallic Ni3Fe alloy nanoparticles encapsulated in 3D porous N-doped graphene aerogel was prepared through a facile hydrothermal assembly and calcination process. Inspired by the unique configuration and strong electronic interactions between Ni3Fe and N-doped graphene, Ni3Fe-GA(1)exhibited outstanding activity and stability for OER, ORR, and Zn-air batteries. More information can be found in the Full Paper by L. Xu, L. Mai, et al. (DOI:10.1002/chem.201904722).

关键词： 3D nitrogen-doped graphene aerogel bifunctional electrocatalyst interface engineering nanoparticles Zn-air batteries

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Efficient full-path optical calculation of scalar and vector diffraction using the Bluestein method

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Light(Science & Applications) 2020年第1期9卷 872-882页

作者： Yanlei Hu Zhongyu Wang Xuewen Wang Shengyun Ji Chenchu Zhang Jiawen Li Wulin Zhu Dong Wu Jiaru Chu CAS Key Laboratory of Mechanical Behavior and Design of Materials Key Laboratory of Precision Scientific Instrumentation of Anhui Higher Education InstitutesDepartment of Precision Machinery and Precision InstrumentationUniversity of Science and Technology of ChinaHefei 230026China Department of Mechanical Engineering and Department of Civil and Environmental Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China Institute of Industry and Equipment Technology Hefei University of TechnologyHefei 230009China

Efficient calculation of the light diffraction in free space is of great significance for tracing electromagnetic field propagation and predicting the performance of optical systems such as microscopy,photolithography,and ***,existing calculation methods suffer from low computational efficiency and poor ***,we present a fast and flexible calculation method for computing scalar and vector diffraction in the corresponding optical regimes using the Bluestein *** computation time can be substantially reduced to the sub-second level,which is 105 faster than that achieved by the direct integration approach(~hours level)and 102 faster than that achieved by the fast Fourier transform method(~minutes level).The high efficiency facilitates the ultrafast evaluation of light propagation in diverse optical ***,the region of interest and the sampling numbers can be arbitrarily chosen,endowing the proposed method with superior *** on these results,full-path calculation of a complex optical system is readily demonstrated and verified by experimental results,laying a foundation for real-time light field analysis for realistic optical implementation such as imaging,laser processing,and optical manipulation.

关键词： calculation scalar faster

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Influence of glass powder on rheological properties of ultra-Рigh performance concrete paste 2nd

Influence of glass powder on rheological properties of ultra...

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2nd Conference on Research and Application of advanced Cementitious materials and advanced materials Forum, CRAACM and AMF 2020

作者： Nan, Xueli Ji, Jianrui Li, Rongyang Wang, Yi Chen, Hao Tang, Weibing School of Material Science and Engineering Lanzhou University of Technology Lanzhou730050 China State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology Lanzhou730050 China Gansu Province Transportat Planning Survey and Design Institute Co. Ltd Lanzhou730000 China

ISBN: (纸本)9783035718119

Replacing cement and silica fume with glass powder to prepare ultra-high performance concrete (UHPC) is beneficial to solve the ecological problem in the field of civil engineering, but the technologies of preparation, transportation, pumping, and hardening of UHPC mainly relate to its rheological property. Therefore, this paper studied the influence of glass powder on the rheological properties of UHPC paste by performing the flow and the rheological test. Experimental results showed that when the cement and silica fume partially replaced by glass powder, the UHPC paste appears shear thickening, yield stress, plastic viscosity, and area of hysteresis loop decrease. This means that mixing glass powder can somehow inhibit the problems of segregation and bleeding of UHPC during pumping. In this manner, the dosage of the superplasticizer in UHPC is appropriately reduced, the filling capacity of UHPC during pouring is improved, and the energy required for UHPC in the pumping process is weakened. Compared with replacing cement, replacing silica fume with glass powder significantly increases the shear thickening and fluidity of UHPC paste, and at the same, reduces its yield stress and plastic viscosity. This indicates that the construction performance of UHPC is greatly improved with the replacement of silica fume. The fluidity and yield stress of UHPC the mechanical properties of UHPC. © 2021 Trans Tech Publications Ltd, Switzerland.

关键词： Silica fume

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Study of the Effect of Impregnation on Continuous Carbon Fibers Reinforced Sic Ceramic Composites Prepared Via material Extrusion and Reactive Melting Infiltration

SSRN

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SSRN 2022年

作者： Liu, Kai Qiu, Lei Zhang, Yuzhen Du, Yanying Sun, Ce Lu, Chao Zhang, Song Tu, Rong Wu, Yanjiao Sun, Huajun Shi, Yusheng State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan430070 China School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China School of Logistics Engineering Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Ningbo volken Technology Co. Ltd Ningbo315000 China State Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan430074 China

This paper presents a new method for the efficient preparation of continuous carbon fibers reinforced SiC ceramic (Cf/SiC) composites using material extrusion (MEX) and reactive melting infiltration (RMI). A slurry with the ability to produce stable filaments with good surface quality has been obtained by comparing the rheological behavior. The resin impregnation-carbonization and RMI processes were used for densification to obtain Cf/SiC composites. The effect of the number of impregnation-carbonization on the properties and microstructure of the sintered bodies has been studied. When the impregnation-carbonization was used for 1 time, the specific strength of the sintered body reached the highest value of 4.5 [[EQUATION]] 10 4 N·m/kg and the bending strength reached 93.1±4.3 MPa. In addition, Cf/SiC with complex structures were prepared using this method. This new approach reveals significant potential for MEX printing technology to prepare Cf/SiC composites with complex and lightweight structures. © 2022, The Authors. All rights reserved.

关键词： Carbon fibers

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Tristate Ferroelectric Memory Effect Attained by Tailoring the Ferroelectric Behavior in Bi1/2(Na0.8k0.2)Tio3 with EU Doping

SSRN

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SSRN 2022年

作者： Hu, Yang Zhang, Huazhang Zhoua, Jing Shen, Jie Chen, Binbin Li, Ang Chen, Wen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Department of Physics School of Sciences Wuhan University of Technology Wuhan430070 China Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya572025 China

The ferroelectric behavior of Bi1/2(Na0.8K0.2)1/2TiO3 (BNKT) relaxor has been tailored by Eu3+ doping and the intermediate relaxor state has been utilized for tristate ferroelectric memory effect. With the increase of the Eu3+ content, the electric field-induced long-range ferroelectric order is gradually disrupted. The P-E loops gradually become pinched and double-like, indicating that intermediate relaxor state appears during the polarization reversal. The disruption of ferroelectric order by Eu3+ doping is also manifested in the dielectric and piezoelectric properties, and structurally, in XRD patterns and PL spectra. In the series of Eu3+ doped BNKT, we find that the composition with the Eu3+ doping content of 3.0% would be suitable for tristate ferroelectric memory effect, in which two ferroelectric states with upward and downward polarizations and a middle relaxor state are served as the "+1", "−1" and "0" memory states, respectively. Verification experiment shows that the write and read of all the three states are feasible, with a reasonably good retention ability. Moreover, the luminescence property imparted by the dopant ion Eu3+ and its sensitivity to local structural symmetry also imply a potential possibility for non-destructive optical readout. © 2022, The Authors. All rights reserved.

关键词： Ferroelectricity

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Single-Atom Catalysts for Electrochemical Hydrogen Evolution Reaction: Recent Advances and Future Perspectives

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Nano-Micro Letters 2020年第2期12卷 73-101页

作者： Zonghua Pu Ibrahim Saana Amiinu Ruilin Cheng Pengyan Wang Chengtian Zhang Shichun Mu Weiyue Zhao Fengmei Su Gaixia Zhang Shijun Liao Shuhui Sun Institut National de la Recherche Scientifique-Énergie Matériaux et Télécommunications VarennesQC J3X 1S2Canada State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China The Key Laboratory of Fuel Cell Technology of Guangdong Province The Key Laboratory of New Energy Technology of Guangdong UniversitiesSchool of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510641People’s Republic of China Key Laboratory of Materials Processing and Mold Ministry of EducationZhengzhou UniversityZhengzhou 450002People’s Republic of China

Hydrogen,a renewable and outstanding energy carrier with zero carbon dioxide emission,is regarded as the best alternative to fossil *** most preferred route to large-scale production of hydrogen is by water electrolysis from the intermittent sources(e.g.,wind,solar,hydro,and tidal energy).However,the efficiency of water electrolysis is very much dependent on the activity of ***,designing high-effective,stable,and cheap materials for hydrogen evolution reaction(HER)could have a substantial impact on renewable energy ***,single-atom catalysts(SACs)have emerged as a new frontier in catalysis science,because SACs have maximum atom-utilization efficiency and excellent catalytic reaction *** synthesis methods and analytical techniques have been adopted to prepare and characterize these *** this review,we discuss recent progress on SACs synthesis,characterization methods,and their catalytic ***,we highlight their unique electrochemical characteristics toward ***,the current key challenges in SACs for HER are pointed out and some potential directions are proposed as well.

关键词： Single-atom catalysts Nanomaterials Electrocatalyst Hydrogen evolution reaction Electrochemical energy conversion

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Superelastic Carbonaceous Nanofibrous Aerogel Enables High Pressure-Sensitivity, Thermal Insulation and Photothermal Properties

SSRN

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SSRN 2022年

作者： Wan, Fuqiang Wei, Jingjiang Zhu, Chenglong Liu, Yin Ping, Hang Xie, Hao Wang, Hao Wang, Weimin Fu, Zhengyi State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Luoshi Road No. 122 Wuhan430070 China School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology Luoshi Road No. 122 Wuhan430070 China

Carbonaceous aerogels attract extensive research interest due to their impressive physical properties such as high porosity, high electrical conductivity, low thermal conductivity, and low density. However, the low durability of the aerogels under compression is a concern due to the intrinsically weakness. In this work, superelastic, multimodal porous, carbonaceous nanofibrous aerogel (CAs) were prepared by carbonizing chitin aerogels (ChAs). The ChAs were prepared and structurally optimized by combining progressive typical dissolution–regeneration, solvent exchange with 50 wt% tert -butanol and lyophilization. The CAs exhibited remarkable elasticity and stability under compression, even under extreme temperatures. After the CAs had been subjected to loading-and-unloading cycle under the compressive strain ( ɛ ) of 50%, the CAs exhibited a very low energy-loss coefficient (0.15) at the first cycle. Moreover, the CAs maintained structural integrity with little deterioration of mechanical properties after 1000 cycles. The structural stability and the superelasticity conferred the CAs a fast and accurate piezoresistive response, which renders it potential for the fabrication of pressure sensor with a high gauge factor (GF, 14.24) under low ɛ (less than 2%). Furthermore, the biomass derived cost-efficient CAs demonstrated excellent thermal insulation and high photothermal-conversion efficiency of solar energy (96.4%). © 2022, The Authors. All rights reserved.

关键词： Thermal insulation

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Operando Selenium Treatment Towards Enhanced Cyclic Stability for Single-Crystal Ni-Rich Cathode at Ultra-High Voltage of 4.7 V

SSRN

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SSRN 2023年

作者： Zhang, Zhi Ding, Xiang He, Xinyou Gong, Yang Xiao, Biaobiao Shen, Jixue Ou, Xing Hunan Provincial Key Laboratory of Water Treatment Functional Materials Hunan Provincial Key Laboratory for Control Technology of Distributed Electric Propulsion Aircraf College of Chemistry and Materials Engineering Hunan University of Arts and Science Changde415000 China Engineering Research Center of the Ministry of Education for Advanced Battery Materials School of Metallurgy and Environment Central South University Changsha410083 China Institute of Advanced Battery Materials and Devices Faculty of Materials and Manufacturing Beijing University of Technology Beijing100124 China Tianmu Lake Institute of Advanced Energy Storage Technologies Co. Ltd Liyang213300 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Developing high-voltage (≥4.3 V vs Li/Li+) single-crystal Ni-rich LiNixCoyMn1-x-yO2 offers an enticing strategy to achieve high energy density for lithium-ion batteries. However, at high-voltage operation, the cathode will be vulnerable to induce the intrinsic Oα- (α 0.6Co0.1Mn0.3O2 (SC-NCM) cathode materials by introducing the surface Se element, exhibiting an "anti-aging" effect of inhibiting the escape of oxygen on SC-NCM particles during the ultra-high voltage (4.7 V) cycling. Both theoretical calculation and experimental results confirm that the outside-in nanostructure would substitute some mobile Oα- at the surface of highly charged SC-NCM particle, stabilizing the oxygen lattice and suppressing O2 release during long-term cycling. Meanwhile, the surface modification of thin Se layer will alleviate the parasitic reactions and improve the electronic conductivity. Under the synergistic strategy of surface modification and interface doping, the obtained SC-NCM exhibits boosted cyclic stability in coin half-cell and pouch full-cell simultaneously. Therefore, the reversible capacity of LiNi0.6Co0.1Mn0.3O2 at high voltage is competitive with comercial LiNixCoyMn1-x-yO2 (x ≥ 0.8), demonstrating more superior safety ability and cyclic property. It provides an effective approach for improving the long-term performance of Ni-rich cathode materials for practical application under ultra-high working voltage. © 2023, The Authors. All rights reserved.

关键词： Single crystals

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Recent development of implantable and flexible nerve electrodes

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Smart materials in Medicine 2020年 1卷 131-147页

作者： Shi, Yue Liu, Ruping He, Liang Feng, Hongqing Li, Ye Li, Zhou Beijing Institute of Graphic Communication Beijing102600 China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and Sensor Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing100083 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Implantable electrical devices offer a variety of potential diagnostic options and treatments in different medical fields. Especially in the absence of specific drugs, the implantable nerve electrodes (INEs) are one of the main treatments for neurological diseases such as epilepsy, Parkinson's disease, Alzheimer's disease, etc. INEs are helpful in studying and regulating nervous system via recording nerve electrical signals or stimulating nerve tissue, but the mechanical mismatch between rigid electrode and soft biological tissue is a critical challenge for long-term implantation. The advances in micromachining technologies and materials have greatly promoted the development of INEs, such as enhanced biocompatibility, reduced foreign body reactions, and structural innovation. In particular, the mechanical performances of flexible implantable electrode and soft biological tissue matched better with less tissue damage. In this review, the implantable flexible nerve electrodes (IFNEs) based on functionalized substrates, intelligent electrodes, and innovative structures are elaborated and discussed. We summarized their various applications in neural prosthesis and neural signal recording. We also discussed the questions and possible methods for developing future IFNEs in the perspective. © 2020 The Authors

关键词： Electrodes

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Operando Selenium Treatment Towards Enhanced Cyclic Stability for Single-Crystal Ni-Rich Cathode at Ultra-High Voltage of 4.7 V

SSRN

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SSRN 2023年

作者： Zhang, Zhi Ding, Xiang He, Xinyou Gong, Yang Xiao, Biaobiao Shen, Jixue Ou, Xing Engineering Research Center The Ministry of Education for Advanced Battery Materials School of Metallurgy and Environment Central South University Changsha410083 China Hunan Provincial Key Laboratory of Water Treatment Functional Materials Hunan Provincial Key Laboratory for Control Technology of Distributed Electric Propulsion Aircraf College of Chemistry and Materials Engineering Hunan University of Arts and Science Changde415000 China Institute of Advanced Battery Materials and Devices Faculty of Materials and Manufacturing Beijing University of Technology Beijing100124 China Tianmu Lake Institute of Advanced Energy Storage Technologies Co. Ltd Liyang213300 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

关键词： Single crystals

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