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Triple-phase interfaces of graphene-like carbon clusters on antimony trisulfide nanowires enable high-loading and long-lasting liquid Li_(2)S_(6)-based lithium-sulfur batteries

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Journal of Energy Chemistry 2021年第8期30卷 599-607,I0013页

作者： Chenyang Zha Donghai Wu Xiuquan Gu Houyang Chen Key Laboratory of Flexible Electronics(KLOFE) Institute of Advanced Materials(IAM)Nanjing Tech UniversityNanjing 211816China Henan Key Laboratory of Nanocomposites and Applications Institute of Nanostructured Functional MaterialsHuanghe Science and Technology CollegeZhengzhou 450006China School of Materials and Physics China University of Mining and TechnologyXuzhou 221116JiangsuChina Department of Chemical and Biological Engineering State University of New York at Buffalo14260-4200 BuffaloUSA

High performance of lithium-sulfur batteries have been dragged down by their shuttling behavior which is complicated multiphase transition-based 16-electron redox reactions of the S8/Li2 *** this article,the triple-phase interfaces of graphene-like carbon clusters on antimony trisulfide(C-Sb_(2)S_(3))nanowires are tailored to design a multifunctional polysulfide host which can inhibit migration of polysulfides and accelerate conversion kinetics of redox electrochemical *** from the triple-interface design of polysulfides/Sb_(2)S_(3)/carbon clusters,the C-Sb_(2)S_(3) electrode not only anchors polysulfide migration by the synergistic effect of Sb,S,and C atoms as interfacial active sites,but also the graphene-like carbon clusters shorten the diffusion paths to further favor redox electron/ion transport through the liquid(electrolyte/polysulfide)and solid(Li2 S/S8,carbon clusters,and Sb_(2)S_(3))-based ***,these Li_(2)S_(6)-based C-Sb_(2)S_(3) cells possess high sulfur loading,excellent cycling stability,impressive specific capacity,and great rate *** work of interfacial engineering reveals insight for powering reaction kinetics in the complicated multistep catalysis reaction with multiphase evolution-based chargetransfer/non-transfer processes.

关键词： Triple-phase interfaces Graphene-like carbon Antimony trisulfide High preformance Lithium-sulfur batteries

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Ultra-High Steep Ion Beam Etching by Employing Highly Dynamic Holder

Ultra-High Steep Ion Beam Etching by Employing Highly Dynami...

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China Semiconductor technology International Conference (CSTIC)

作者： Baosheng Du Zeli Wang Simian Zhang Pengcheng Qu Guoxing Liang Weidong Sun Xiaoming Yang Chen Wang Suzhou Youlun Vacuum Equipment Technology Co. Ltd. Suzhou China State Key Laboratory of New Ceramics and Fine Processing Key Laboratory of Advanced Materials of Ministry of Education School of Materials Science and Engineering Tsinghua University Beijing China Great Wall Navigation Technology Co. Ltd. Beijing China Beijing Zhongkehangxing Technology Co. Ltd. Beijing China Beijing Advanced Innovation Center for Integrated Circuits Beijing China

ISBN: (数字)9798331513351

ISBN: (纸本)9798331513368

For high-quality etching of incredibly small dimensions and complicated structures, it is essential to provide great control over sidewall morphology during the IBE process. This study presents a two-dimensional high precision adjustable motion sample holder and corresponded dynamic etching process for ion beam etching system designed to improve control over sidewall morphology and improve etching uniformity during the etching process. Structural enhancements increase the control accuracy to 0.1°, highly improving incident angle precision. It minimizes surface roughness in nanopatterning and ensures high-quality etching, meeting the strict requirements of sidewall contour control, improving the sidewall angle from 67.8° to 84.7°. The proposed solution significantly enhances etching uniformity for small, complex structures.

关键词： Accuracy Nanopatterning Dynamics Process control Surface morphology Morphology Etching Surface roughness Rough surfaces Ion beams

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Activating lattice oxygen of two-dimensional MnXn-1O2 MXenes via zero-dimensional graphene quantum dots for water oxidation

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Science China materials 2022年第11期65卷 3053-3061页

作者： Yiyuan Ma Yurong An Zhuo Xu Laifei Cheng Wenyu Yuan Science and Technology on Thermostructural Composite Materials Laboratory School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China State Key Laboratory of Solidification Processing School of Material Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy TechnologyInstitute for Advanced Energy MaterialsSchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119China Key Laboratory of Macromolecular Science of Shaanxi Province Key Laboratory of Applied Surface and Colloid ChemistrySchool of Chemistry&Chemical EngineeringShaanxi Normal UniversityXi’an 710062China

The poor oxygen evolution reaction(OER)activity of two-dimensional(2 D)transition metal carbides(MXenes)is a major obstacle to their application in highperformance water splitting and fuel cells due to the high energy barriers for the absorption of ***,we demonstrate that the lattice oxygen of M_(n)X_(n-1)O_(2)MXenes can be activated by 0 D graphene quantum dots(GQDs),thereby activating the OER via the lattice-oxygen oxidation mechanism(LOM)instead of the conventional adsorbate evolving *** pH-dependent OER activity of M_(n)X_(n-1)O_(2)@GQDs and ^(18)O isotope-labelling experiments with time-of-flight secondary-ion mass spectrometry(TOF-SIMS)provide the direct evidence of ***,the activated lattice oxygen amount can be controlled by the *** as-prepared 0 D/2 D Ti_(3)C_(2)O_(2)@GQDs heterostructure delivers a highly reduced overpotential of 390 mV(bare Ti_(3)C_(2)O_(2):530 mV)at a benchmark current density of 10 mA cm^(-2).Through optimizing the thickness and the additional conductive substrate,the overpotential at 10 mA cm^(-2)decreases to 250 mV,while the Tafel slope is reduced to 39 mV dec^(-1);these values indicate the as-prepared heterostructure is superior to the state-of-the-art MXene-based OER *** work provides a new strategy to enhance the OER activity of M_(n)X_(n-1)O_(2)and extends the application of LOM from perovskite to MXenes.

关键词： graphene quantum dots lattice-oxygen activation oxygen evolution reaction water splitting heterostructure

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Microstructure and Mechanical Properties of Sic-Gnps-Sicw Composites by Oscillatory Pressure Sintering

SSRN

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SSRN 2023年

作者： Yang, Yifan Zhu, Tianbin Su, Yuqi Wang, Heng Liang, Xiong Li, Yawei Xie, Zhipeng Han, Yao The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Wuhan430081 China National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology Wuhan University of Science and Technology Wuhan430081 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China Aerospace Institute of Advanced Materials & Processing Technology Beijing100074 China

The preparation of SiC-based ceramics with high densification, high strength and exceptional toughness is still a severe challenge. A new dynamic pressure sintering technique—oscillatory pressure sintering (OPS) was used to prepare SiC ceramics with one-dimensional silicon carbide whiskers (SiCw) and two-dimensional graphene nanoplatelets (GNPs) as reinforcing phases;the microstructure analysis and mechanical properties of such composites were studied. When the contents of GNPs and SiCw were 1 wt% and 5 wt% respectively, the relative density of SiC-based composites reached 99.86%, and their Vickers hardness, flexure strength and fracture toughness were up to 31.55 GPa, 742 MPa and 7.32 MPa·m1/2, respectively. The small grain size and the enhanced interface between the matrix and the reinforcing phase could effectively improve the flexural strength of the composites. The main toughening mechanisms of SiC-based composites were crack deflection and bridging, and the bridging of GNPs and SiCw. Meanwhile, the formation of well-matched coherent interfaces of SiC/GNPS and SiC/SiCw contributed to a synergistic improvement in strength and toughness of SiC-based composites. © 2023, The Authors. All rights reserved.

关键词： Silicon carbide

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Ultrathin zinc selenide nanosheet-based intercalation hybrid coupled with CdSe quantum dots showing enhanced photocatalytic CO_(2) reduction

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Chinese Chemical Letters 2021年第8期32卷 2474-2478页

作者： Zejun Zhao Zailun Liu Zhixiao Zhu Fang Wang Fei Teng Wenjun Jiang Yong Yang State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal MaterialsNorthwestern Polytechnical UniversityXi’an 710072China Qian Xuesen Laboratory of Space Technology China Academy of Space TechnologyBeijing 100094China School of Environmental Science and Engineering Nanjing University of Information Science&TechnologyNanjing 210044China

Fabrication of well-designed heterojunctions is an extraordinarily attractive pathway for boosting the photocatalytic activity toward CO_(2) ***,a novel kind of na nosheet-based intercalation hybrid coupled with CdSe quantum dots(QDs) was successfully fabricated by a facile solvothermal method and served as photocatalyst for full-spectrum-light-driven CO_(2) ***-small CdSe QDs were rationally in-situ introduced and coupled with lamellar ZnSe-intercalation hybrid nanosheet,resulting in the formation of CdSe ***/ZnSe hybrid ***,the concentration of Cd^(2+) could change directly the crystallinity and micromorphology of ZnSe intercalation hybrid,which in turn would impact on the photocatalysis *** optimized CdSe QDs/ZnSe hybrid-5 composite demonstrated a considerable CO yield rate of the 25.6 μmol g^(-1) h^(-1) without any additional cocatalysts or sacrificial agents assisting,making it one of the best reported performance toward CO_(2) photoreduction under full-spectrum *** elevated CO_(2) photoreduction activity could be attributed to the special surface heterojunction,leading to improving the ability of light absorption and promoting the separation/transfer of photogenerated *** present study developed a new strategy for designing inorganic-organic heterojunctions with enhanced photocatalyst for CO_(2) photoreduction and provided an available way to simultaneously mitigate the greenhouse effect and alleviate energy shortage pressure.

关键词： Inorganic-organic hybrid ZnSe intercalation hybrid CdSe quantum dots Light absorption Photocatalytic CO_(2)reduction

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Local microenvironment reactive zone engineering promotes water activation

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materials Reports(Energy) 2025年第2期5卷 1-4,I0001页

作者： Jian Luo Junjie Zheng Mingjie Wu Fang Dong Yuyu Liu Jinli Qiao Yingkui Yang State Key Laboratory of New Textile Materials and Advanced Processing Wuhan Textile UniversityWuhan430200China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Environmental Science and EngineeringDonghua UniversityShanghai201620China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092China Institute for Sustainable Energy College of SciencesShanghai UniversityShanghai200444China Institut National de la Recherche Scientifique(INRS) Centre Energie Materiaux TelecommunicationsVarennesQCJ3X 1P7Canada

Beyond conventional electrocatalyst engineering,recent studies have demonstrated the effectiveness of manipulating the local reaction environment to enhance the performance of electrocatalytic *** general principles and strategies of local environmental engineering for different electrocatalytic processes have been extensively *** perspective critically appraises the recent advancements in local reaction environment engineering for water activation,aiming to provide a comprehensive assessment of this emerging field.

关键词： Local microenvironment Water activation Oxygen evolution reaction(OER) Hydrogen evolution reaction(HER)

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Major strategies for improving the performance of perovskite solar cells

iEnergy

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iEnergy 2023年第3期2卷 172-199页

作者： Lixiu Zhang Hang Li Kai Zhang Wenzhe Li Chuantian Zuo George Omololu Odunmbaku Jingde Chen Cong Chen Luozheng Zhang Ru Li Yuping Gao Baomin Xu Jiangzhao Chen Yongsheng Liu Yang Wang Yanlin Song Jianxin Tang Feng Gao Qing Zhao Yong Peng Mingzhen Liu Lei Tao Yuelong Li Zhimin Fang Ming Cheng Kuan Sun Dewei Zhao Yixin Zhao Shihe Yang Chenyi Yi Liming Ding Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China State Key Laboratory of Power System Department of Electrical EngineeringTsinghua UniversityBeijing 100084China Shenzhen Graduate School Peking UniversityShenzhen 518055China School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China College of Materials Science and Engineering&Engineering Research Center of Alternative Energy Materials&Devices Sichuan UniversityChengdu 610065China School of Energy&Power Engineer-ing Chongqing UniversityChongqing 400044China Institute for Energy Research Jiangsu UniversityZhenjiang 212013China Institute of New Energy Technology Department of Electronic EngineeringCollege of Information Science and TechnologyJinan UniversityGuangzhou 510631China Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China College of Optoelectronic Engineering Chongqing UniversityChongqing 400044China College of Chemistry Nankai UniversityTianjin 300071China Institute of Chemistry Chinese Academy of SciencesBeijing 100190China State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelec-tronics School of PhysicsPeking UniversityBeijing 100871China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China Institute of Photoelectronic Thin Film Devices and Technology Nankai UniversityTianjin 300350China School of Materials Science and Engineering Shaanxi Normal UniversityXi’an 710119China

Metal halide perovskite solar cell(PSC)has successfully distinguished itself in optoelectronic field by virtue of the sharp rise in power conversion efficiency over the past *** remarkable efficiency breakthrough at such a fast speed can be mainly attributed to the comprehensive study on film deposition techniques,especially the effective management of surface and interfacial defects in recent ***,we summarized the current trends in performance enhancement for PSCs,with a focus on the generally applicable strategies in high-performance works,involving deposition methods,compositional engineering,additive engineering,crystallization manipulation,charge transport material selection,interfacial passivation,optical coupling effect and constructing tandem solar *** directions and perspectives are also provided.

关键词： Perovskite solar cells efficiency improvement strategies milestones

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Fast Deposition of Ni Doped Ysz Coatings by Cathode Plasma Electrolysis for Solid Oxide Fuel Cell Applications

SSRN

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SSRN 2024年

作者： Liu, Chenxu Du, Ke Song, Chen Zhou, Chenchen Zhang, Jin Liu, Min Tian, Yu Meng, Yonggang State Key Laboratory of Tribology in Advanced Equipment Tsinghua University Beijing100084 China Institute of New Materials Guangdong Academy of Science National Engineering Laboratory for Modern Materials Surface Engineering Technology The Key Lab of Guangdong for Modern Surface Engineering Technology Guangzhou510650 China School of Materials Science and Engineering Nanyang Technological University Singapore639798 Singapore Beijing Key Laboratory for Corrosion Erosion and Surface Technology Institute of Advanced Materials and Technology University of Science and Technology Beijing Beijing100083 China

The fast fabrication of high-quality anode layers of solid oxide fuel cells (SOFCs) is a key factor for their efficient applications. In this work, a one-step method of cathode plasma electrolytic deposition (CPED) was developed to prepare Ni doped YSZ coatings with a thickness of 35-55 μm on porous stainless steel. Compared to the several hours required by traditional methods, a faster coating deposition that only took 60 s was achieved owing to the effect of enormous energy of plasma arc at the solid-liquid interface in the CPED method. The preparation process was analyzed by recording the variation of current with voltage. The unique micro-structure of the coatings was observed, and the formation mechanism of the Ni doped YSZ coating during the CPED process was proposed. The deposited coatings showed an excellent performance as the anode layers for SOFCs, with Sc2O3 stabilized ZrO2 coating prepared by atmospheric plasma spraying as electrolyte and La0.6Sr0.4Co0.2Fe0.8O3-δ as the cathode. The open circuit voltage of the cells reached 1.000 V and the maximum power density reached 817.42 mW/cm2 at 800℃. The finding opens a novel pathway for the efficient preparation of anode materials for SOFCs. © 2024, The Authors. All rights reserved.

关键词： Fabrication

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Orbital-level band gap engineering of RuO₂ for enhanced acidic water oxidation

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Nature Communications 2025年第1期16卷 1-13页

作者： Wang, Xing Pi, Wei Li, Zhaobing Hu, Sheng Bao, Haifeng Xu, Weilin Yao, Na State Key Laboratory of New Textile Materials and Advanced Processing School of Materials Science and Engineering Wuhan Textile University Wuhan 430200 China

Developing efficient and stable oxygen evolution reaction electrocatalysts under acidic conditions is crucial for advancing proton-exchange membrane water electrolysers commercialization. Here, we develop a representative strategy through p-orbital atoms (N, P, S, Se) doping in RuO₂ to precisely regulate the lattice oxygen-mediated mechanism-oxygen vacancy site mechanism pathway. In situ and ex situ measurements along with theoretical calculations demonstrate that Se doping dynamically adjusts the band gap between the Ru-e_g and O-p orbitals during the oxygen evolution reaction process. This modulation accelerates electron diffusion to the external circuit, promotes the lattice oxygen-mediated process, and enhances catalytic activity. Additionally, it facilitates electron feedback and stabilizes oxygen vacancies, thereby promoting the oxygen vacancy site mechanism process and enhancing catalytic stability. The resulting Se-RuO_x catalyst achieves efficient proton-exchange membrane water electrolysers performance under industrial conditions with a minimal charge overpotential of 1.67 V to achieve a current density of 1 A cm⁻² and maintain long-term cyclability for over 1000 h. This work presents a unique method for guiding the future development of high-performance metal oxide catalysts. © The Author(s) 2025.

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High entropy rare earth hexaborides/tetraborides(HE REB_(6)/HE REB_(4)) composite powders with enhanced electromagnetic wave absorption performance

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Journal of materials Science & technology 2021年第28期87卷 155-166页

作者： Weiming Zhang Biao Zhao Na Ni Huimin Xiang Fu-Zhi Dai Shijiang Wu Yanchun Zhou Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing100076China Henan Key Laboratory of Aeronautical Materials and Application Technology School of Material Science and EngineeringZhengzhou University of AeronauticsZhengzhou450046China Key Lab of Education Ministry for Power Machinery and Engineering School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai200240China Zibo Firststar New Material Incorporated Co.Ltd. Zibo255000China

The increasing electromagnetic hazards including electromagnetic interference and electromagnetic pollution,which were stemmed from massive usage of electromagnetic technology,have triggered widespread *** cope with this challenge,electromagnetic wave absorbing materials with high performance are greatly *** construction has been widely applied in electromagnetic(EM)wave absorbing materials to achieve high permittivity,high permeability and impedance ***,high-temperature stability,oxidation and corrosion resistance are still unignorable ***,high entropy hexaborides/tetraborides(HE REB_(6)/HE REB_(4))composites with synergistic dielectric and magnetic losses were designed and successfully synthesized through a one-step boron carbide reduction *** five as-prepared(Y_(0.2) Nd_(0.2) Sm_(0.2) Eu_(0.2) Er_(0.2))B_(6)/(Y_(0.2) Nd_(0.2) Sm_(0.2) Eu_(0.2) Er_(0.2))B_(4),(Y_(0.2) Nd_(0.2) Sm_(0.2) Er_(0.2) Yb_(0.2))B_(6)/(Y_(0.2) Nd_(0.2) Sm_(0.2) Er_(0.2) Yb_(0.2))B_(4),(Y_(0.2) Nd_(0.2) Eu_(0.2) Er_(0.2) Yb_(0.2))B_(6)/(Y_(0.2) Nd_(0.2) Eu_(0.2) Er_(0.2) Yb_(0.2))B_(4),(Nd_(0.2) Sm_(0.2) Eu_(0.2) Er_(0.2) Yb_(0.2))B_(6)/(Nd_(0.2) Sm_(0.2) Eu_(0.2) Er_(0.2) Yb_(0.2))B_(4) and(Y_(0.2) Sm_(0.2) Eu_(0.2) Er_(0.2) Yb_(0.2))B_(6)/(Y_(0.2) Sm_(0.2) Eu_(0.2) Er_(0.2) Yb_(0.2))B_(4) contain two phases of HE REB_(6) and HE REB_(4).Among them(Y_(0.2) Nd_(0.2) Sm_(0.2) Eu_(0.2) Er_(0.2))B_(6)/(Y_(0.2) Nd_(0.2) Sm_(0.2) Eu_(0.2) Er_(0.2))B_(4)(HE REB_(6)/HE REB_(4)-1)and(Y_(0.2) Nd_(0.2) Sm_(0.2) Er_(0.2) Yb_(0.2))B_(6)/(Y_(0.2) Nd_(0.2) Sm_(0.2) Er_(0.2) Yb_(0.2))B_(4)(HE REB_(6)/HE REB_(4)-2)exhibit excellent EM wave absorption *** optimal minimum reflection loss(RL_(m in))and effective absorption bandwidth(E_(AB))of HE REB_(6)/HE REB_(4)-1 and HE REB_(6)/HE REB_(4)-2 are–53.3 dB(at 1.7 mm),4.2 GHz(at 1.5 mm)and–43.5 dB(1.3 mm),4.2 GHz(1.5 mm),*** combination of conducting HE REB_(4) with magnetism into HE REB_

关键词： High entropy ceramics Hexaborides/tetraborides composites One-step synthesis Electromagnetic wave absorption Synergistic dielectric and magnetic losses

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