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Pressureless all-solid-state Na/S batteries with self-supporting Na_(5)YSi_(4)O_(12) scaffolds

Carbon Energy 2023年第12期5卷 97-110页

作者： Aikai Yang Ruijie Ye Huimin Song Qiongqiong Lu Xingchao Wang Enkhtsetseg Dashjav Kai Yao Daniel Grüner Qianli Ma Frank Tietz Olivier Guillon Forschungszentrum Jülich GmbH Institute of Energy and Climate Research(IEK-1)JülichGermany Institute of Mineral Engineering(GHI) RWTH Aachen UniversityAachenGermany Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials School of Materials Science and EngineeringPeking UniversityBeijingChina Institute of Materials Henan Academy of SciencesZhengzhouHenanChina Henan Key Laboratory of Advanced Conductor Materials ZhengzhouHenanChina State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources Key Laboratory of Advanced Functional MaterialsAutonomous RegionInstitute of Applied ChemistryCollege of ChemistryXinjiang UniversityUrumqiXinjiangChina Forschungszentrum Jülich GmbH Institute of Energy and Climate Research(IEK-2)JülichGermany Jülich Aachen Research Alliance JARA-EnergyJülichGermany

The development of reliable and affordable all-solid-state sodium metal batteries(ASS-SMBs)requires suitable solid-state electrolytes with cost-efficient processing and stabilized electrode/electrolyte ***,an integrated porous/dense/porous Na_(5)YSi_(4)O_(12)(NYS)trilayered scaffold is designed and fabricated by tape casting using aqueous *** this template-based NYS scaffold,the dense layer in the middle serves as a separator and the porous layers on both sides accommodate the active materials with their volume changes during the charge/discharge processes,increasing the contact area and thus enhancing the utilization rate and homogenizing the current *** Na/NYS/Na symmetric cells with the Pb-coated NYS scaffold exhibit significantly reduced interfacial impedance and superior critical current density of up to 3.0 mA cm^(-2)against Na metal owing to enhanced ***,the assembled Na/NYS/S full cells operated without external pressure at room temperature showed a high initial discharge capacity of 970 mAh g^(-1)and good cycling stability with a capacity of 600 mAh g^(-1)after 150 cycles(based on the mass of sulfur).This approach paves the way for the realization of economical and practical ASS-SMBs from the perspective of ceramic manufacturing.

关键词： Na/S batteries Na_(5)YSi_(4)O_(12) scaffold solid-state electrolytes tape casting

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Enhancing thermal conductivity of silicone rubber composites by insitu constructing SiC networks:A finite-element study based on first principles calculation

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Nano Research 2023年第1期16卷 1430-1440页

作者： Dongliang Ding Shiyu Zhang Haoyu Liang Xu Wang Ya Wu Yuanming Ye Zhenguo Liu Qiuyu Zhang Guangzhao Qin Yanhui Chen School of Chemistry and Chemical Engineering Shaanxi Key Laboratory of Macromolecular Science and TechnologyKey Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information TechnologyNorthwestern Polytechnical UniversityXi’an 710072China Shenzhen Research Institute of Northwestern Polytechnical University Shenzhen 518057China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082China Queen Mary University of London Engineering School Northwestern Polytechnical UniversityXi’an 710072China Institute of Flexible Electronics Northwestern Polytechnical UniversityXi’an 710072China Ningbo Institute of Northwestern Polytechnical University Ningbo 315103China

Polymer composites as thermal interface materials have been widely used in modern electronic *** this work,we report a novel method to prepare highly through-plane thermally conductive silicone rubber(SR)composites with vertically aligned silicon carbide fibers(VA-SiCFs)entangled by SiC nanowires(SiCNWs)***,a series of carbon fibers(CFs)skeletons were fabricated in sequence of coating poor thermally conductive polyacrylonitrile-based CFs with polydopamine,icetemplated assembly,and freeze-drying ***,VA-SiCFs networks,i.e.,long-range continuous SiCFs-SiCNWs networks,based on the prepared CFs skeletons,were in-situ obtained via template-assisted chemical vapor deposition *** thermal conductivity enhancement mechanism of VA-SiCFs networks on its SR composites was also intensively studied by finite element simulation,based on the first principles investigation of SiC,and Foygel’s *** in-situ grown VA-SiCFs networks possess high intrinsic thermal conductivity without the thermal interface between fillers,acting as the high-efficiency through-plane long-range continuous thermal conduction path,in which the SiCNWs were the in-plane“thermal spreader”.The VA-SiCFs/SR composites reached a high through-plane thermal conductivity,2.13 W/(m·K),at the filler loading of 15 vol.%,which is 868.2%,and 249.2%higher than that of pure SR sample,and random-CFs@polydopamine(PDA)/SR composites at the same content,*** VA-SiCFs/SR composites also exhibited good electrical insulation performance and excellent dimensional stability,which guaranteed the stable interfacial heat transfer of high-power density electronic devices.

关键词： silicon carbide fibers silicon carbide nanowires silicone rubber composites through-plane thermal conductivity first principles

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Enhancing tensile strength and oxidation resistance simultaneously for W-Cu composite by versatile Cr

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Journal of Materials science & technology 2026年 243卷 15-27页

作者： Xianneng Wei Chao Hou Tielong Han Yurong Li Hao Lu Keli Liu Xiaoyan Song State Key Laboratory of Materials Low-Carbon Recycling Key Laboratory of Advanced Functional Materials MOE College of Materials Science and Engineering Beijing University of Technology Beijing 100124 China Beijing Feihang Jiexun Technology Co. Ltd Beijing 100074 China

High mechanical properties and oxidation resistance are simultaneously demanded in high-temperature applications of W-Cu composites. In this study, both tensile strength and oxidation resistance were remarkably enhanced for the W-Cu composite by introducing the versatile Cr element. It was found that after liquid-state sintering, Cr had a multiscale distribution ranging from atomic to submicron scales. A high tensile strength of the Cr-containing W-Cu composite was attributed to multiple reinforcement, including submicron-scale dispersive Cr oxide particles, ultrafine-grained structure of W, coherent interfaces between Cr-rich nanoparticles and matrix, and enhanced bonding at W grain boundaries. The segregation of Cr atoms facilitates electronic coupling with the W atoms, thereby strengthening the W grain boundaries and reducing intergranular fracture in the W phase. Furthermore, the Cr-containing W-Cu composite exhibited much stronger oxidation resistance in a high temperature range of 700–1000 °C than the W-Cu counterpart. In the W-Cu-Cr composite, self-passivation occurs at high temperatures, where a continuous and compact Cr 2 WO 6 layer effectively inhibits oxygen diffusion into the interior region, while simultaneously hindering Cu diffusion into the oxide layer, thus preventing the formation of pores at Cu/oxide layer interfaces. This study provides insight for further development of W-Cu based composites with superior integrated performance.

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Interfacial engineering by multifunctional ruthenium complex for CsPbI_(2)Br perovskite solar cells with a fill factor over 0.82

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science China Materials 2024年第10期67卷 3245-3252页

作者： Shuai Chen Binxia Jia Depeng Chu Hua Li Jian Cui Wangen Zhao Zicheng Ding Kui Zhao Shengzhong(Frank)Liu Yaohong Zhang Guohua Wu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Laboratory for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119China School of Physics Northwest UniversityXi’an 710127China Qingdao Innovation and Development Base of Harbin Engineering University Harbin Engineering UniversityHarbin 150001China The Key Laboratory of Functional Molecular Solids Ministry of EducationWuhu 241002China

The interface is of paramount importance in heterostructures,as it can be considered as a device in accordance with Kroemer’s *** perovskite solar cells(PSCs),optimizing the interface between the perovskite layer and the hole transport layer is known to be an effective method for enhancing PSC device ***,a metal ruthenium complex coded as C101 is introduced to the perovskite(CsPbI_(2)Br)/hole transport layer(PTAA)interface as a“charge driven motor”to selectively extract holes from CsPbI_(2)Br and then transfer them to PTAA,minimizing the voltage loss in *** significantly,the introduction of C101 layer effectively passivates the surface of CsPbI_(2)Br film and reduces the defect density of CsPbI_(2)Br film due to the covalent bond between the CsPbI_(2)Br and the–C=O group in *** photovoltaic performance of CsPbI_(2)Br PSCs is enhanced by 23.60%upon the introduction of C101 interfacial layer,with the champion CsPbI_(2)Br PSC exhibiting a power conversion efficiency of 14.96%in a reverse scan,a short-circuit current of 15.84 mA·cm^(−2),an open-circuit voltage of 1.15 V,and a fill factor of 82.03%.Additionally,the introduction of C101 simultaneously enhances the humidity tolerance of CsPbI_(2)Br PSCs.

关键词： perovskite solar cells CsPbI_(2)Br interfacial engineering ruthenium complex multifunctional

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3D Lamellar-Structured Graphene Aerogels for Thermal Interface composites with High Through-Plane Thermal Conductivity and Fracture Toughness

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Nano-Micro Letters 2021年第2期13卷 13-27页

作者： Pengfei Liu Xiaofeng Li Peng Min Xiyuan Chang Chao Shu Yun Ding Zhong-Zhen Yu Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China

Although thermally conductive graphene sheets are efficient in enhancing in-plane thermal conductivities of polymers,the resulting nanocomposites usually exhibit low through-plane thermal conductivities,limiting their application as thermal interface ***,lamellarstructured polyamic acid salt/graphene oxide(PAAS/GO)hybrid aerogels are constructed by bidirectional freezing of PAAS/GO suspension followed by ***,PAAS monomers are polymerized to polyimide(PI),while GO is converted to thermally reduced graphene oxide(RGO)during thermal annealing at 300℃.Final graphitization at 2800℃ converts PI to graphitized carbon with the inductive effect of RGO,and simultaneously,RGO is thermally reduced and healed to high-quality ***,lamellar-structured graphene aerogels with superior through-plane thermal conduction capacity are fabricated for the first time,and its superior through-plane thermal conduction capacity results from its vertically aligned and closely stacked high-quality graphene *** vacuum-assisted impregnation with epoxy,the resultant epoxy composite with 2.30 vol% of graphene exhibits an outstanding through-plane thermal conductivity of as high as 20.0 W m^−1 K^−1,100 times of that of epoxy,with a record-high specific thermal conductivity enhancement of 4310%.Furthermore,the lamellar-structured graphene aerogel endows epoxy with a high fracture toughness,~1.71 times of that of epoxy.

关键词： Anisotropic aerogels Graphene Thermal conductivity Epoxy composites Fracture toughness

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Pressure-induced cation and vacancy disorder-order transition and near-zero τ_f in deficient hexagonal perovskite Ba8ZnTa6O24 dielectrics

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science China Chemistry 2025年

作者： Bin Zheng Ruiwen Ji Cécile Genevois Wenda Zhang Xing Ming Qiang Zhang Mathieu Allix Congling Yin Xiaojun Kuang Xianran Xing MOE Key Laboratory of New Processing Technology for Nonferrous Metal and Materials Guangxi Key Laboratory of Optical and Electronic Materials and Devices College of Materials Science and Engineering Guilin University of Technology Centre National de la Recherche Scientifique (CNRS) CEMHTI UPR3079 Université d'Orléans College of Physics and Electronic Information Engineering Guilin University of Technology Neutron Scattering Division Oak Ridge National Laboratory Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources Guilin University of Technology Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials College of Chemistry and BioengineeringGuilin University of Technology Beijing Advanced Innovation Center for Materials Genome Engineering and Institute of Solid-State Chemistry University of Science and Technology Beijing

Pressure applications can enable the tuning of atomic/defect ordering and provide access to new functional materials. Here, we report that pressure-induced structural transformation featuring disorder-order transition of both cations and vacancies in the 8-layer deficient hexagonal perovskite tantalate dielectrics Ba8ZnTa6O24, which transformed the structure from twin to shift and remarkably lowered the temperature coefficient of resonant frequency τ_f down to near zero（～0.56 ppm/°C） from 38 ppm/°C for the twinned precursor. The atomic scale STEM-HAADF and EDS results confirm the ordering of Zn in the Ta host at the nanometer scale in the shifted material featuring well-ordered Ba8ZnTa6O24slabs intergrown with Ba3ZnTa2O9and Ba5Ta4O15monolayers and anti-phase grain boundaries as planar defects. The pressure-induced twin-shift structural transformation of Ba8ZnTa6O24features the rare constant concentration of the hexagonal stacked layers, which is allowed by the vacancy ordering at the central layers of face-shared octahedral（FSO） trimers avoiding the FSO B-B repulsion, and remarkably the faster cationic ordering kinetics compared with the 2:1 ordered complex perovskites. Although the inclusion of numerous planar defects and the oxidizable atomic defects led to significant p-type conduction and inhomogeneous electrical microstructures, resulting in an extraordinarily high extrinsic dielectric loss for the high-pressure shifted Ba8ZnTa6O24pellet, the intrinsically near-zero τ_fcould make the shifted Ba8ZnTa6O24perovskite an ideal microwave dielectric resonator candidate if the defects could be eliminated.

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Two-dimensional non–van der Waals niobium nitride nanosheets with high-temperature two-gap superconductivity

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Physical Review B 2025年第20期111卷 205426-205426页

作者： Si-Yi Xiong Peng Jiang Yiming Wang Yan-Ling Li Laboratory for Quantum Design of Functional Materials and School of Physics and Electronic Engineering Jiangsu Normal University Xuzhou 221116 China Center for High Pressure Science and Technology Advanced Research Shanghai 201203 China

The exploration of the superconductivity in two-dimensional materials has garnered significant attention due to their promising low-power applications and fundamental scientific interest. Here, we report some stable non–van der Waals NbxNx+1 (x=1–4) monolayers derived from the NbN bulk exfoliated along the [001] direction, as identified through first-principles calculations. Among these monolayers, Nb2N3, which crystallizes in the P6¯m2 symmetry, stands out with an exceptional superconducting transition temperature of 77.8 K, setting a new high-Tc benchmark for two-dimensional transition-metal nitrides and binary compounds. Our detailed analysis reveals that the strong superconductivity in Nb2N3 is driven by phonon modes dominated by N vibrations, with significant electron-phonon coupling contributions from N-p and Nb-d electronic states. Using the anisotropic Migdal-Eliashberg framework, we further determine the two-gap nature of the superconductivity in the Nb2N3 monolayer, characterized by pronounced electron-phonon coupling and anisotropic energy gaps. These results advance our understanding of superconductivity in two-dimensional transition-metal nitride and highlight their potential for nanoscale superconducting applications.

关键词： Nickel compounds

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Direct Ink Writing of Highly Conductive MXene Frames for Tunable Electromagnetic Interference Shielding and Electromagnetic Wave-Induced Thermochromism

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Nano-Micro Letters 2021年第10期13卷 14-28页

作者： Xinyu Wu Tingxiang Tu Yang Dai Pingping Tang Yu Zhang Zhiming Deng Lulu Li Hao-Bin Zhang Zhong-Zhen Yu State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China

The highly integrated and miniaturized next-generation electronic products call for high-performance electromagnetic interference(EMI)shielding materials to assure the normal operation of their closely assembled ***,the most current techniques are not adequate for the fabrication of shielding materials with programmable structure and controllable shielding ***,we demonstrate the direct ink writing of robust and highly conductive Ti3C2Tx MXene frames with customizable structures by using MXene/AlOOH inks for tunable EMI shielding and electromagnetic wave-induced thermochromism *** as-printed frames are reinforced by immersing in AlCl_(3)/HCl solution to remove the electrically insulating AlOOH nanoparticles,as well as cross-link the MXene sheets and fuse the filament interfaces with aluminum *** freeze-drying,the resultant robust and porous MXene frames exhibit tunable EMI shielding efficiencies in the range of 25-80 dB with the highest electrical conductivity of 5323 S m−***,an electromagnetic wave-induced thermochromic MXene pattern is assembled by coating and curing with thermochromic polydimethylsiloxane on a printed MXene pattern,and its color can be changed from blue to red under the high-intensity electromagnetic *** work demonstrates a direct ink printing of customizable EMI frames and patterns for tuning EMI shielding efficiency and visualizing electromagnetic waves.

关键词： MXene Electromagnetic interference shielding Direct ink writing Electrical conductivity Thermochromism

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High-entropy ceramics:Present status,challenges,and a look forward

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Journal of advanced Ceramics 2021年第3期10卷 385-441页

作者： Huimin XIANG Yan XING Fu-zhi DAI Hongjie WANG Lei SU Lei MIAO Guojun ZHANG Yiguang WANG Xiwei QI Lei YAO Hailong WANG Biao ZHAO Jianqiang LI Yanchun ZHOU Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing 100076China New Energy Technology Engineering Laboratory of Jiangsu Province Nanjing University of Posts and TelecommunicationsNanjing 210023China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China Guangxi Key Laboratory of Information Materials Guangxi Collaborative Innovation Center of Structure and Property for New Energy and MaterialSchool of Material Science and EngineeringGuilin University of Electronic TechnologyGuilin 541004China Institute of Functional Material College of Material Science and EngineeringDonghua UniversityShanghai 201620China Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China College of Metallurgy and Energy North China University of Science and TechnologyTangshan 063210China College of Material Science and Engineering Shenzhen UniversityShenzhen 518060China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Henan Key Laboratory of Aeronautical Materials and Application Technology School of Material Science and EngineeringZhengzhou University of AeronauticsZhengzhou 450046China National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology CAS Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China

High-entropy ceramics (HECs) are solid solutions of inorganic compounds with one or more Wyckoff sites shared by equal or near-equal atomic ratios of multi-principal *** in the infant stage,the emerging of this new family of materials has brought new opportunities for material design and property *** from metals,the diversity in crystal structure and electronic structure of ceramics provides huge space for properties tuning through band structure engineering and phonon *** from strengthening,hardening,and low thermal conductivity that have already been found in high-entropy alloys,new properties like colossal dielectric constant,super ionic conductivity,severe anisotropic thermal expansion coefficient,strong electromagnetic wave absorption,etc.,have been discovered in *** a response to the rapid development in this nascent field,this article gives a comprehensive review on the structure features,theoretical methods for stability and property prediction,processing routes,novel properties,and prospective applications of *** challenges on processing,characterization,and property predictions are also ***,future directions for new material exploration,novel processing,fundamental understanding,in-depth characterization,and database assessments are given.

关键词： high-entropy ceramics(HECs) processing structure properties applications

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CMAS hot corrosion behavior of rare-earth silicates for environmental barrier coatings applications: a comprehensive review

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Heat Treatment and Surface Engineering 2021年第1期3卷 9-28页

作者： Cao, Gui Wang, Yu-Hao Ding, Zhao-Ying Liu, Zhan-Guo Ouyang, Jia-Hu Wang, Ya-Ming Wang, Yu-Jin Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology School of Materials Science and Engineering Harbin Institute of Technology Harbin China

As one of the most promising materials for environmental barrier coatings (EBCs) applications, rare-earth (RE) silicates possess good high-temperature stability, coefficients of thermal expansion (CTEs) close to those of Si-based ceramics, low thermal conductivities, and excellent hot-corrosion resistances to water vapor and calcia-magnesia-aluminosilicate (CMAS) molten salts. With the gradual understanding on thermophysical properties of rare-earth silicates, more and more researches focus on their CMAS hot-corrosion behavior, which is strongly related to the formation of corrosion products, infiltration of CMAS glass, and the final failure caused by stress-induced microcracks. In this review, the dependences of CMAS properties and sticking behavior on the composition of CMAS are introduced. Then the CMAS hot-corrosion processes of different rare-earth silicates containing rare-earth disilicates, rare-earth monosilicates, and rare-earth oxyapatites are evaluated, as well as different corrosion reactions and potential failure mechanisms during these processes. Wherein, the formation of corrosion products and the infiltration of CMAS depend on the RE: Si ratio, species of rare-earth cations, or other additives, which lead to the research prospects to modification strategies of rare-earth silicates, including the entropy-stabilized solid-solution, the composite technology and microstructure-tailored coatings. The outlook for further investigation is also highlighted. © 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

关键词： calcia-magnesia-aluminosilicate (CMAS) corrosion Environmental barrier coatings (EBCs) rare-earth silicates stress-induced failure modes

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