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Designing gadolinium-transition metals-based perovskite type high entropy oxides with good cryogenic magnetocaloric performances

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材料科学技术（英文版） 2025年第4期207卷 317-323页

作者： Junli Lin Xin Wang Fengying Chen Hai-Feng Li Lingwei Li Key Laboratory of Novel Materials for Sensor of Zhejiang Province College of Materials and Environmental EngineeringHangzhou Dianzi UniversityHangzhou 310012China Institute of Applied Physics and Materials Engineering University of MacauAvenida da UniversidadeMacao SARTaipa999078China

Cryogenic magnetic cooling based on the principle of the magnetocaloric effects(MCEs)of magnetic solids has been recognized as an alternative cooling technology due to its significant economic and social *** novel magnetic materials with good magnetocaloric performance is a prerequisite for practical *** this study,three gadolinium-transition metal-based high entropy oxides(HEOs)of Gd(Fe1/4Ni1/4Al1/4Cr1/4)O3,Gd(Fe1/5Ni1/5Al1/5Cr1/5Co1/5)O3,and Gd(Fe1/6Ni1/6Al1/6Cr1/6Co1/6Mn1/6)O3 were designed and systematically characterized regarding their structural and cryogenic magnetic *** HEOs were confirmed to crystallize into a single-phase perovskite-type orthorhombic structure with a homogeneous microstructure,reveal a second-order magnetic transition at low temperatures,and exhibit significant cryogenic *** magnetocaloric performances of the present HEOs,identified by magnetic entropy changes,relative cooling power,and temperature-averaged entropy changes,were com-parable with recently reported candidate *** present study indicates potential applications for cryogenic magnetic cooling of the present HEOs and provides meaningful clues for designing and explor-ing HEOs with good cryogenic magnetocaloric performances.

关键词： High entropy oxides Transition metal Magnetocaloric properties Cryogenic magnetic refrigeration

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Chemical reaction mechanisms and models of energetic materials: A perspective

Energetic Materials Frontiers

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Energetic materials Frontiers 2025年第1期6卷 129-144页

作者： Meng, Li Song, Qing-guan Yao, Chuang Zhang, Lei Pang, Si-ping School of Materials Science & Engineering Beijing Institute of Technology Beijing100081 China Institute of Applied Physics and Computational Mathematics Beijing100088 China Institute of Chemical Materials China Academy of Engineering Physics Mianyang621999 China of Chongqing School of Materials Science and Engineering Yangtze Normal University Chongqing408100 China

Energetic materials (EMs) are a kind of metastable functional materials with certain potential barriers, overcoming which can quickly release the energy stored in EMs. A thorough understanding of reaction mechanisms and accurate quantification of reaction rates are fundamental issues for optimizing energy output, ensuring hazard mitigation, and assessing the safety levels of EMs. This perspective provides an overview of research progress in chemical reaction mechanisms and models, with a particular emphasis on organic EMs and reactive metals. Organic EMs are mainly composed of carbon, hydrogen, nitrogen, and oxygen elements, enabling supersonic and self-sustaining detonation reactions capable of significant energy output. The incorporation of reactive metals like aluminum, magnesium, and boron has been recently found to augment the combustion heat and explosion temperature of EM formulations, sparking heightened research interest. This perspective first presents both EMs’ reaction mechanisms revealed via multiscale simulations and experimental methods, including thermal decomposition, shock initiation, and post combustion. Then, quantitatively characterized expressions of the physical models derived from the revealed mechanisms, including mathematical expressions like elementary and phenomenological reaction kinetic models, and emerging data-driven machine learning models, are reviewed. Finally, the view of the application, existing problems, and further development directions are outlined. © 2024 The Authors

关键词： Reaction rates

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Versatile BiFeO_(3) shining in piezocatalysis:From materials engineering to diverse applications

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Journal of Advanced Ceramics 2025年第3期14卷 1-27页

作者： Jian Dai Zhenhao Fan Hang Xie Yitao Jiao Fu Huang Ahmad Azmin Mohamad Yunfei Chang Yangke Long Dawei Wang School of Instrumentation Science and Engineering Harbin Institute of TechnologyHarbin 150080China Institute of Applied Physics and Materials Engineering University of MacaoAvenida da UniversidadeMacao 999078China Energy Materials Research Group(EMRG) School of Materials and Mineral Resources EngineeringUniversiti Sains MalaysiaNibong Tebal 14300Malaysia Zhengzhou Research Institute Harbin Institute of TechnologyZhengzhou 450046China Department of Transportation and Environment Shenzhen Institute of Information TechnologyShenzhen 518172China

The growing global demand for sustainable solutions to address energy and environmental challenges has spurred significant interest in catalytic *** has emerged as a sustainable technology for environmental remediation and energy conversion because of its unique characteristics of harvesting mechanical energy into electrochemical *** BiFeO_(3)(BFO)stands out among a range of piezocatalysts for its distinctive integration of piezoelectric,multiferroic,and optical *** review critically examines piezocatalytic mechanisms,including energy band theory,screening charge effects,and displacement current theory,revealing the intricate roles of internal charges,screening charges,and piezoelectric electrons in driving catalytic ***,the evolution of BFO-based piezocatalysis is systematically reviewed,emphasizing its structural characteristics,representative synthesis methods,performance optimization strategies,and diverse applications,such as organic pollutant degradation,H_(2) production,H_(2)O_(2)generation,CO_(2)reduction,and *** particular,the underestimated ferroelectric polarization effect of BFO on CO_(2)reduction is critically analyzed and *** review identifies critical challenges and outlines future research directions to advance high-efficiency BFO-based piezocatalytic ***,this comprehensive analysis underscores the potential of BFO in piezocatalysis,bridging materials engineering with practical applications and offering insights into future advancements.

关键词： BiFeO_(3)(BFO) piezocatalysis piezoelectric effect environmental remediation energy conversion

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Interactive issues and strategic solutions for aqueous Zn metal anodes

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Journal of Energy Chemistry 2025年第4期103卷 163-187页

作者： Huifa Shi Sa Han Zhanghao Hou Hongbo Lan Shuzhang Niu Qing Li Shandong Engineering Research Center for Additive Manufacturing Qingdao University of TechnologyQingdao 266520ShandongChina College of New Materials and New Energies Shenzhen Technology UniversityShenzhen 518118GuangdongChina Institute of Applied Physics and Materials Engineering University of MacaoMacao 999078China

Aqueous zinc(Zn)-ion batteries(ZIBs)have garnered significant attention as promising energy storage devices,primarily due to their low cost,high power density,and excellent safety ***,the commercial viability of these batteries is hindered by several issues related to the Zn metal anode,including dendritic growth,hydrogen evolution reaction(HER),surface corrosion,and *** review delves into the root causes and key factors influencing these challenges from both electrochemical thermodynamics and kinetics ***,viable strategies to mitigate these issues are systematically summarized,including Zn anode reconstruction,artificial solid-electrolyte interphase(SEI)protection,electrolyte formulation optimization,and separator *** research advancements are examined thoroughly,with a focus on the mechanisms behind these approaches and the resulting battery *** review also critically assesses the strengths and limitations of these ***,we highlight crucial research directions aimed at advancing the practical application of Zn metal anodes in future aqueous ZIBs.

关键词： Zn metal anode Dendrite growth HER Surface corrosion Protection strategies

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An electron-transfer-tuning strategy at the graphene/metal interface for improving acidic water electrolysis in proton exchange membrane electrolyzers

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Journal of Energy Chemistry 2025年第4期103卷 344-352页

作者： Yue Xu Shuaidong Li Yingjian He Fumiya Shiokawa Samuel Jeong Aimi Asilah Haji Tajuddin Zeyu Xi Yoshikazu Ito Jingzi Zhang Zeyun Cai Xi Lin Kailong Hu School of Materials Science and Engineering and Institute of Materials Genome&Big DataHarbin Institute of TechnologyShenzhen 518055GuangdongChina Institute of Special Environments Physical Sciences Harbin Institute of TechnologyShenzhen 518055GuangdongChina School of Computer Science and Technology Harbin Institute of TechnologyShenzhen 518055GuangdongChina Institute of Applied Physics Graduate School of Pure and Applied SciencesUniversity of TsukubaTsukuba 305-8573Japan

Graphene encapsulation has been shown to be an effective technique for improving the corrosion resistance of non-noble metal catalysts for the acidic water *** key challenge lies in enhancing the electrocatalytic activity of graphene-encapsulated metals while maintaining their durability in acidic ***,an electron-transfer-tuning strategy is investigated at the graphene/NiMo interface,aiming to improve the hydrogen evolution reaction(HER)performance of graphene-encapsulated NiMo *** doping of Ti,a low electronegativity element,into NiMo substrate was confirmed to increase electron transfer from the metal core toward the *** electron-rich state on graphene facilitates the adsorption of positively charged protons on graphene,thereby enabling a Pt/C-comparable performance in 0.5 M H_(2)SO_(4),with only a 3.8%degradation in performance over a 120-h continuous *** proton exchange membrane(PEM)water electrolyzer assembled by the N-doped grapheneencapsulated Ti-doped NiMo exhibits a smaller cell voltage to achieve a current density of 2.0 A cm^(-2),in comparison to the Pt/C based *** study proposes a novel electron-transfer-tuning strategy to improve the HER activity of graphene-encapsulated non-noble metal catalysts without sacrificing durability in acidic electrolytes.

关键词： Hydrogen evolution Acidic media Graphene encapsulation Interface Proton exchange membrane

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Tuning surface reactivity towards high-performance hard carbon in Li/Na/K-ion batteries

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Journal of Energy Chemistry 2025年第4期103卷 27-36页

作者： Wang Zhou Dan Wang Ying Mo Rui Tang Peng Gao Miaomiao Han Shi Chen Keigo Wakabayashi Takeharu Yoshii Hirotomo Nishihara Jilei Liu College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology of Clean EnergyHunan Province Key Laboratory for Advanced Carbon Materials and Applied TechnologyHunan UniversityChangsha 410082HunanChina The Key Laboratory of Micro-nano Energy Materials and Application Technologies University of Hunan Province&College of Physics and Electronic EngineeringHengyang Normal UniversityHengyang 421002HunanChina Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoMacao 999078China Institute of Multidisciplinary Research for Advanced Materials Tohoku University2-1-1 KatahiraAoba-kuSendaiMiyagi 980-8577Japan Advanced Institute for Materials Research(WPI-AIMR) Tohoku University2-1-1 KatahiraAoba-kuSendaiMiyagi 980-8577Japan

Controlling surface chemistry is critically important for improving the initial Coulombic efficiency(ICE)and adsorption capacity of hard carbon anode used in Li/Na/K-ion ***,accurately identifying the types and concentrations of hydrogen/oxygen terminated functional groups(HTFG/OTFGs)and distinguishing their functionalities remain ***,we quantitatively investigated the surface chemistry on hard carbon via ultra-high temperature programed desorption measurements,and uncovered the role of HTFG/OTFGs in influencing ICE and adsorption capacity in Li/Na/K-ions *** C-H group is found to be dominant species on the surface of hard carbon,and presents a positive correlation with ICE values and adsorption *** low reactivity of C-H group with both electrolyte salt and solvent results in the formation of thinner and highly conducive solid electrolyte interphase(SEI)layer,which benefit for the enhanced ICE and improved Li/Na/K-ions diffusion across SEI ***,the pimping trapping effect of C-H groups allows the adsorbed Li/Na/K-ions to migrate into graphitic interlayer quickly,enhancing the slope *** fabricating a C-H group-rich surface chemistry on hard carbon,a high ICE value and satisfactory specific capacity have been *** findings enrich our understanding of the surface chemistry-induced interfacial reaction,which effectively guides the rational design of high-performance hard carbon.

关键词： Hard carbon Surface chemistry C–H bond Initial coulombic efficiency Adsorption capacity

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Boron nitride welded and encapsulated single-wall carbon nanotube films with enhanced thermal conductivity

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Journal of materials Science and Technology 2025年 238卷 146-154页

作者： Yu, Changping Zhang, Feng Zhao, Haibo Zou, Mengke Zhang, Zichu Zhang, Lili Sun, Pengzhan Wu, Anping Liu, Chang Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang110016 China School of Materials Science and Engineering University of Science and Technology of China Hefei230026 China Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering University of Macau Macau999078 China

Single-wall carbon nanotubes (SWCNTs) have attracted significant attention as a thermal management material because of their high thermal conductivity and excellent thermal stability. However, decreasing the great thermal contact resistance at the tube-tube junctions of SWCNT assemblies is a prerequisite for its practical applications. We report a strategy to address this issue by welding the junctions of SWCNTs together and introducing hexagonal boron nitride (h-BN) encapsulating layers to the surface of the SWCNT bundles. By changing the partial pressure of the BN precursor in a two-step atmospheric-pressure chemical vapor deposition process, amorphous BN nanoparticles and crystalline h-BN were deposited to weld and encapsulate the SWCNT network in sequence. The introduction of the BN led to an in-plane thermal conductivity ∼ 3.8 times higher than that of the SWCNT film, as measured by optothermal Raman method. Molecular dynamics simulations demonstrate that the BN welding and encapsulating facilitate thermal transport by reducing thermal resistance at the tube-tube junctions. Our work brings new insights into facilitating the heat transport in low-dimensional nanomaterial assemblies through structural design. © 2025

关键词： Single-walled carbon nanotubes (SWCN)

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Nanoscale Electron Beam Patterning of PEDOT:PSS Free-Standing Films for Enhanced Thermoelectric Performance

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Energy & Environmental materials 2025年第2期8卷 316-323页

作者： Hyejeong Lee Sunho Lee Sohyang Cha Gopinathan Anoop Hosun Shin Division of Chemical and Materials Metrology Korea Research Institute of Standards and Science KRISS Department of Aerospace Engineering University of Illinois at Urbana-Champaign Department of Applied Measurement Science University of Science and Technology UST Department of Physics Amrita Vishwa Vidyapeetham

The growing demand for flexible,lightweight,and highly processable electronic devices makes high-functionality conducting polymers such as poly(3,4-ethylene dioxythiophene):polystyrene sulfonate(PEDOT:PSS) an attractive alternative to conventional inorganic materials for various applications including ***,considerable improvements are necessary to make conducting polymers a commercially viable choice for thermoelectric *** study explores nanopatterning as an effective and unique strategy for enhancing polymer functionality to optimize thermoelectric parameters,such as electrical conductivity,Seebeck coefficient,and thermal *** nanopatterning into thermoelectric polymers is challenging due to intricate technical hurdles and the necessity for individually manipulating the interdependent thermoelectric ***,array nanopatterns with different pattern spacings are imposed on free-standing PEDOT:PSS films using direct electron beam irradiation,thereby achieving selective control of electrical and thermal transport in PEDOT:*** beam irradiation transformed PEDOT:PSS from a highly ordered quinoid to an amorphous benzoid *** pattern spacing resulted in a remarkable 70% reduction in thermal conductivity and a 60% increase in thermoelectric figure of merit compared to non-patterned PEDOT:*** proposed nanopatterning methodology demonstrates a skillful approach to precisely manipulate the thermoelectric parameters,thereby improving the thermoelectric performance of conducting polymers,and promising utilization in cutting-edge electronic applications.

关键词： nanotechnology polymers semiconductors thermoelectrics

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Thin and Flexible Breeze-Sense Generators for Non-Contact Haptic Feedback in Virtual Reality

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Nano-Micro Letters 2025年第6期17卷 397-410页

作者： Kaijun Zhang Zhe Liu Yexi Zhou Zhaoyang Li Dazhe Zhao Xiao Guan Tianjun Lan Yanting Gong Bingpu Zhou Junwen Zhong Department of Electromechanical Engineering and Centre for Artificial Intelligence and Robotics University of MacaoMacao SAR 999078People’s Republic of China Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoMacao SAR 999078People’s Republic of China

In the realm of virtual reality(VR),haptic feedback is integral to enhance the immersive experience;yet,existing wearable devices predominantly rely on skin contact feedback,lacking options for compact and non-contact breeze-sense ***,we propose a compact and non-contact working model piezoelectret actuator for providing a gentle and safe breeze *** easy-fabricated and flexible breeze-sense generator with thickness around 1 mm generates air flow pressure up to~163 Pa,which is significantly sensed by human *** a typical demonstration,the breeze-sense generators array showcases its versatility by employing multiple coded modes for non-contact information *** thin thinness and good flexibility facilitate seamless integration with wearable VR setups,and the wearable arrays empower volunteers to precisely perceive the continuous and sudden breeze senses in the virtual *** work is expected to inspire developing new haptic feedback devices that play pivotal roles in human-machine interfaces for VR applications.

关键词： Virtual reality Wearable electronics Non-contact haptic feedback Breeze-sense Piezoelectret actuator

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Quantum dots enhanced stability of in-situ fabricated perovskite nanocrystals based light-emitting diodes:Electrical field distribution effects

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Fundamental Research 2025年第1期5卷 347-353页

作者： Xulan Xue Menglin Li Zhenjie Liu Chenhui Wang Jincheng Xu Shuangpeng Wang Hanzhuang Zhang Haizheng Zhong Wenyu Ji Key Lab of Physics and Technology for Advanced Batteries(Ministry of Education) College of PhysicsJilin UniversityChangchun 130012China MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices School of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081China Institute of Applied Physics and Materials Engineering University of MacaoTaipa 999078China

With the development in fabricating efficient perovskite light emitting diodes(PeLEDs),improving the operating stability becomes an urgent *** we report quantum dot(QD)enhanced stability of PeLEDs by introducing CdSe/ZnS core-shell QDs in toluene anti-solvent during in-situ fabrication of FAPbBr3 perovskite nanocrystals(PNCs)*** comparison with PNC films with pristine toluene as the anti-solvent,the as-prepared FAPbBr3 PNC films with a QD monolayer on the surface exhibit improved photoluminescence quantum yield,enhanced photostability and better *** from these advantages,the peak luminance and the maximum external quantum efficiency of the PeLED containing QD monolayer are increased from 6807 cd/m^(2)to 86,670 cd/m^(2)and 2.4%to 7.1%,*** T50 lifetime under the initial luminance of 1021 cd/m^(2)approaches 83 *** on electrical field simulation and transient electroluminescence measurements,the enhanced stability can be mainly attributed to the electrical field redistribution induced by the QD *** work demonstrates that the combination of QDs and perovskites provides an effective strategy to address the operational stability of *** insights into electrical field distribution effect will make great impact on stability improvement of other perovskite based devices.

关键词： Perovskite nanocrystals Quantum dots Electrical field distribution Light-emitting diodes Operational stability

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