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High-Entropy Driven Self-Assembled Dual-phase Composite Air Electrodes with Enhanced Performance and Stability for Reversible Protonic Ceramic Cells

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Advanced Energy materials 2025年第0期

作者： Hu, Ao Yang, Chenghao Li, Yitong Xia, Kaisheng Tian, Yunfeng Pu, Jian Chi, Bo State Key Laboratory of Material Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China Faculty of Materials Science and Chemistry China University of Geosciences Wuhan430078 China School of Materials Science and Physics China University of Mining and Technology Xuzhou221116 China

Reversible proton ceramic cells (R-PCCs) offer a transformative solution for dual functionality in power generation and energy storage. However, their potential is currently obstacles by the lack of high-performance air electrodes combining high electrocatalytic activity with durability. Here, an innovative air electrode composed of high-entropy driven self-assembled xNiO-Pr0.2La0.2Ba0.2Sr0.2Ca0.2Fe0.8Ni0.2−xO3−δ (N-XFN) composites is presented, which result from the unique lattice distortion effects inherent in high-entropy perovskites. The experimental results coupled with density functional theory (DFT) calculations verify that the lattice distortion at the high-entropy A-site significantly induces NiO nanoparticles exsolved from the B-site, promoting the formation of a biphasic composite structure that dramatically increases the electrochemical active sites. Remarkably, R-PCCs using the N-XFN composite air electrode achieve an impressive peak power density of 1.30 W cm−2 in fuel cell mode and a current density of -2.52 A cm−2 at 1.3 V in electrolysis mode at 650 °C. In addition, the cells show excellent stability with reversibility over 830 h, including 500 h in electrolysis mode and 330 h in reversible operation at 650 °C. This research provides important insights into the design of high-entropy perovskites, paving the way for advanced R-PCCs technology. © 2025 Wiley-VCH GmbH.

关键词： Perovskite

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Development of high-performance functional electrode using Cr stabilized La0.6Sr0.4FeO3-based perovskite oxide for revisable solid oxide cells

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Ceramics International 2025年

作者： Geng, Jiaqi Guo, Qunwei Pan, Jiawen Liu, Xucong Xue, Yuan Chi, Bo Pu, Jian School of Materials Science and Engineering State Key Laboratory of Material Processing and Die & Mould Technology Huazhong University of Science & Technology Hubei Wuhan430074 China School of Energy and Power Jiangsu University of Science and Technology Zhenjiang212100 China Department of Chemistry and Biochemistry The University of Mississippi University MS38655 United States

A Cr doped La0.6Sr0.4Fe0.8Cr0.2O3 (LSFCr) perovskite is developed as fuel electrode for solid oxide cell. Comprehensive characterizations have proved Cr can help retain Fe atoms within the lattice and enhance the durability of the material during reduction. LSFCr demonstrates remarkable electrochemical performance. In fuel cell mode, the LSFCr half-cell demonstrates a polarization resistance of 0.03 Ω cm2 at 850 °C in wet H2. And the electrolyte supported full-cell achieves peak power densities of 1.37 W/cm2 in wet H2 and 1.10 W/cm2 in wet CH4 at 850 °C. The cell provides a steady performance over 300 h at 0.4 A/cm2 in wet CH4 at 750 °C with no carbon deposition detected. In electrolysis mode, the cell achieves a high current density of −2.31 A/cm2 and -2.45 A/cm2 at 1.5 V and 850 °C during CO2 and steam electrolysis, respectively. And it maintains reliable performance for 296 h at 1.4 V and 750 °C under dry CO2 atmosphere. Along with the systematic tests, a reasonable mechanism is proposed to illustrate the promoting effect of the reduced LSFCr multiphase on electrochemical processes. © 2025

关键词： Electrolysis

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Emergency Response Mobile 3d Printing System: A Case Study in Rapid Manufacturing of Polyurethane Foam Bridges

SSRN

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SSRN 2025年

作者： Zhou, Yan Liang, Jingwen Zeng, Zhuo Wang, Penglin Wang, Zhongxu Wen, Shifeng Zhou, Cheng National Center of Technology Innovation for Digital Construction School of Civil and Hydraulic Engineering Huazhong University of Science and Technology Wuhan430074 China State Key Laboratory of Material Processing and Die and Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China

This case study describes a PF3DP mobile construction system that can be used for emergency response. The PF3DP system integrates a drone-based 3D reconstruction workflow, a lightweight mobile robotic platform (MCP), and a fast-curing polyurethane foam for on-site fabrication in less than 20 minutes. A functional demonstration bridge structure model was printed and validated through finite element simulation (FEA) and field testing. FEA simulations confirmed the bridge's theoretical load-bearing capacity of 42,552 Newtons (equivalent to 40 adults), while field tests verified that the bridge could safely carry four adults (2,600 Newtons) without deformation, meeting the requirements for immediate pedestrian evacuation in the event of a disaster. This work provides a replicable template for the deployment of temporary infrastructure in disaster-affected areas, with the potential to be extended to shelters, flood barriers, and medical facilities. © 2025, The Authors. All rights reserved.

关键词： Disasters

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Effects of fiber content on crystallization behavior and mechanical properties for fiber-reinforced microcellular injection molding combined with in-mold decoration process

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materials and Design 2025年 254卷

作者： Yu, Shengrui Hua, Haitao Xu, Lei Song, Senzhen Zhang, Tianyu He, Linan Dong, Chunfa Li, Qingzhou Chen, Fei Han, Wen Zeng, Lanyu Zhou, Huamin School of Mechanical and Electronic Engineering Jingdezhen Ceramic University Jingdezhen333403 China State Key Lab of Material Processing and Die & Mold Technology Huazhong University of Science and Technology Wuhan430074 China

Fiber-reinforced microcellular injection molding combined with in-mold decoration (FR-MIM/IMD) is an emerging technique for producing lightweight polymer components with excellent mechanical performance and surface quality. However, unlike conventional injection molding (CIM), the FR-MIM/IMD process involves complex interactions among supercritical fluid, polymer melt, and reinforcing fibers, complicating the control of crystallization and structure–property development. In particular, the effects of varying fiber contents on melt behavior, cellular structure, and crystallization dynamics remains poorly understood. This study investigates how glass fiber (GF) content influences melt flow characteristics, microstructure, crystallization behavior, mechanical performance, and apparent density in nitrogen (N2)-foamed polypropylene (PP)/GF composites, using simulations and experiments. Results show that increasing fiber content elevates melt temperature, while viscosity peaks at 20 wt% before declining. Higher fiber content promotes fiber alignment, reduces cell size, increases cell density, and improves cell uniformity. Crystallization temperature rises with fiber content, although the crystallization rate slows. Both crystal size and β-crystal content peak at 20 wt%. Tensile and flexural strengths increase significantly—by 193.4 and 157.4% from 0 to 30 wt%, respectively—while elongation at break peaks at 10 wt%. Apparent density increases by 26.3%. These findings provide insights for optimizing FR-MIM/IMD process and tailoring composite performance. © 2025 The Author(s)

关键词： Tensile strength

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Fatigue of Li metal anode in solid-state batteries

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Science (New York, N.Y.) 2025年第6744期388卷 311-316页

作者： Tengrui Wang Bo Chen Yijie Liu Zhenyou Song Zhongqiang Wang Yuwei Chen Qian Yu Jiayun Wen Yiming Dai Qi Kang Fei Pei Rong Xu Wei Luo Yunhui Huang Institute of New Energy for Vehicles School of Materials Science and Engineering Tongji University Shanghai China. School of Electrical Engineering Southwest Jiaotong University Chengdu China. State Key Laboratory of Material Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan Hubei China. State Key Laboratory for Strength and Vibration of Mechanical Structures Department of Engineering Mechanics Xi'an Jiaotong University Xi'an China.

Solid-state lithium metal batteries (SSBs) are promising for electric vehicles because of their potential to provide high energy density and enhanced safety. However, these batteries face short-circuit challenges caused by uncontrolled lithium dendrite growth during cycling. Using operando scanning electron microscopy and phase-field simulations, we determined that failure of SSBs is closely linked to the fatigue of the lithium metal anode, which markedly contributes to interface degradation and dendrite growth in SSBs. This fatigue follows the Coffin-Manson equation in mechanics, indicating that it is an innate characteristic. Clarifying the essential role of fatigue provides a physical basis for understanding failures of SSBs and paves the way to extending their lifespan.

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Modulating Electric Double Layers via Polymer Electric Dipole Effects to Enhance Stability in Quasi-Solid-state Sodium Metal Batteries

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Angewandte Chemie - International Edition 2025年 e202505509页

作者： Li, Zhiyong Chen, Jianxiong Fang, Qiu Fu, Jialong Ren, Yi Wang, Xuefeng Guo, Xin School of Materials Science and Engineering State Key Laboratory of Material Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan 430074 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China

The interfacial instability of Na metal anodes poses a significant barrier to the practical applications of sodium metal batteries. According to electric double layer (EDL) theory, the potential difference in the Helmholtz layer critically affects electrochemical reactions at the electrode/electrolyte interfaces, which governs the solid electrolyte interphase (SEI) composition and the Na deposition process. Herein, we leverage the electric dipole effect of polymers, formed via in situ polymerization of butyl acrylate (BA), which preferentially adsorbs on the Na metal surface, to modulate the conformation of the EDL. Molecular dynamics simulations reveal that poly-BA facilitates the formation of a more compressed diffuse layer and reduces the potential difference in the Helmholtz layer. This compressed EDL with the change of species derives homogeneous SEI, enabling reversible Na plating/stripping. As a result, the poly-BA quasi-solid electrolyte extends the lifespan of the Na||Na cell to 3500 h at 0.1 mA cm⁻². Quasi-solid-state Na||Na₃V₂(PO₄)₃ cells maintain stable cycling over 1500 cycles, with a capacity retention of 87.6% at 5 C. Our findings indicate that modulating the EDL structure via the electric dipole effect of polymers enables uniform Na deposition, offering a promising strategy for designing electrolytes for practical quasi-solid-state sodium metal batteries. © 2025 Wiley-VCH GmbH.

关键词： Electric double layer Na deposition Na metal anode Quasi-solid polymer electrolyte Solid-state battery

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Microstructure and high-temperature wear properties of in situ TiC composite coatings by plasma transferred arc surface alloying on gray cast iron

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International Journal of Minerals,Metallurgy and materials 2015年第12期22卷 1273-1282页

作者： Hang Zhao Jian-jun Li Zhi-zhen Zheng Ai-hua Wang Qi-wen Huang Da-wen Zeng State Key Laboratory of Material Processing and Die & Mould Technology Huazhong University of Science & Technology

In this work, an in situ synthesized TiC-reinforced metal matrix composite （MMC） coating of approximately 350-400μm thickness was fabricated on a gray cast iron （GCI） substrate by plasma transferred arc （PTA） surface alloying of Ti-Fe alloy powder. Microhard- ness tests showed that the surface hardness increased approximately four-fold after the alloying treatment. The microstructure of the MMC coating was mainly composed of residual austenite, acicular martensite, and eutectic ledeburite. Scanning electron microscopy （SEM） and X-ray diffraction analyzes revealed that the in situ TiC particles, which were formed by direct reaction of Ti with carbon originally contained in the GCI, was uniformly distributed at the boundary of residual anstenite in the alloying zone. Pin-on-disc high-temperature wear tests were performed on samples both with and without the MMC coating at room temperature and at elevated temperatures （473 K and 623 K）, and the wear behavior and mechanism were investigated. The results showed that, after the PTA alloying treatment, the wear resistance of the sam- ples improved significantly. On the basis of our analysis of the composite coatings by optical microscopy, SEM with energy-dispersive X-ray spectroscopy, and microhardness measurements, we attributed this improvement of wear resistance to the transformation of the microstruc- ture and to the presence of TiC particles.

关键词： gray cast iron composite coatings particle-reinforced composites titanium carbide surface alloying microstructure wear

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Microstructural evolution of Mg9AlZnY alloy with vibration in lost foam casting during semi-solid isothermal heat treatment

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中国有色金属学会会刊：英文版 2010年第S3期20卷 768-773页

作者：赵忠樊自田蒋文明董选普 State Key Laboratory of Material Processing and Die & Mould Technology Huazhong University of Science and Technology

The nearly equiaxed grains of Mg9AlZnY alloy were obtained by vibrating solidification in lost foam casting(LFC) and the microstructure of Mg9AlZnY alloy was *** this basis,the morphology and size of α-Mg grains fabricated by semi-solid isothermal heat treatment(SSIT) at 530 ℃ and 570 ℃ holding different time were *** results show that the main constituent phases of Mg9AlZnY alloy are α-Mg,β-Mg17Al12 and Al2Y,and the Y can greatly refine α-Mg *** distribution of α-Mg grains equivalent diameters between 20 and 100 μm is up to 87%,and the average roundness of α-Mg grains reaches 1.37 in the specimen obtained at 570 ℃ and holding time 60 *** to the analysis of solidification kinetics and thermodynamic,binary eutectic with low melting point melts firstly on SSIT *** the liquid fraction increases with the solute diffusibility,both of the shape and size of α-Mg grains change *** the liquid fraction reaches equilibrium,the α-Mg grains are gradually spheroidized under the interfacial tension,and then the α-Mg grains begin to combine and *** of α-Mg dendritic grains on SSIT process is obviously different from that of equiaxed grains.

关键词： lost foam casting(LFC) semi-solid isothermal heat treatment(SSIT) microstructural evolution magnesium alloy

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Enhancement of epitaxial growth and mechanical properties of DZ125 superalloy fabricated by defocused-laser powder bed fusion via rotation angle optimization

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materials Science and Engineering: A 2025年 930卷

作者： Gao, Hairui Zhang, Zhenwu Li, Jikang Sun, Jiangtao Xiang, Honghao Wu, Boyang Li, Wei Wei, Qingsong State Key Lab of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China Beijing Engineering Research Center of Efficient and Green Aerospace Propulsion Technology Beijing Institute of Control Engineering Beijing100190 China Key Laboratory of Metallurgical Equipment and Control Technology Ministry of Education Wuhan University of Science and Technology Wuhan430081 China

Reducing grain boundaries and promoting directional grain growth is one of the effective ways to enhance the properties of nickel-based superalloys. This study utilized defocused-laser powder bed fusion (D-LPBF) to fabricate DZ125 directionally solidified nickel-based superalloy and investigated the effects of interlayer rotation angles (0°, 67°, 90°) on their microstructures and mechanical properties. Defocused laser can effectively increase the width-to-depth ratio of the melt pool, which is beneficial for the epitaxial growth of grains. The 0° rotation promotes stress accumulation, leading to a significant number of solidification cracks along the building direction in as-built samples. The 67° rotation tends to induce the formation of equiaxed grains and high angle grain boundaries (HAGBs). The samples fabricated using 90° rotation exhibited strong [001] crystal orientation with an average misorientation angle of 12.8°, which was significantly lower than those of the 0° rotation (23.7°) and 67° rotation (25.7°). Due to the fewer defects and HAGBs, they have the highest ultimate tensile strength (1216 MPa) among the three rotation angles. The elongation at break of 90° rotation samples was 10.2 %, representing increases of 62.0 % and 50.0 % compared to the samples fabricated with 0° and 67° rotation, respectively. The tensile samples exhibited a mixed fracture behavior of brittleness and ductility. The as-printed alloy consists of a γ matrix and MC carbide particles (∼50 nm) distributed at the cell boundaries. During tensile deformation, these MC particles can hinder dislocations movement and promote work-hardening effect. This study provides theoretical guidance and technical references for the preparation of high-performance nickel-based superalloys using LPBF process. © 2025 Elsevier B.V.

关键词： Tensile strength

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Correction to: Durable Fe3O4/PPy Particle Flow Spun Textile for Electromagnetic Interference Shielding and Joule Heating (Advanced Fiber materials, (2025), 7, 2, (513-527), 10.1007/s42765-024-00498-2)

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Advanced Fiber materials 2025年 1-1页

作者： Liu, Jiaxin Qi, Shuo Wang, Hongshan Fu, Chiyu Xu, Weilin Su, Bin Tang, Wenyang Xia, Zhigang State Key Laboratory of New Textile Materials and Advanced Processing Technologies School of Textile Science and Engineering Industry Research and Development Center of Functional Materials and Textile New Technology Textile Industry Key Laboratory of Yarn and Its Functionalization Wuhan Textile University Hubei Wuhan430200 China State Key Laboratory of Material Processing and Die and Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Hubei Wuhan430074 China National Local Joint Engineering Laboratory of Resin-Based Structure and Functional Material Technology Hubei Xiaogan432100 China

In this article the first affiliation details for Jiaxin Liu were incorrectly given as 'state key lab.ratory of New Textile materials and Advanced processing Technologies, School of Textile Science and Engineering, Wuhan Textile University, Wuhan, 430200, Hubei, People’s Republic of China' but should have been 'state key lab.ratory of New Textile materials and Advanced processing Technologies, School of Textile Science and Engineering, Industry Research and Development Center of Functional materials and Textile New technology, Textile Industry key lab.ratory of Yarn and Its Functionalization, Wuhan Textile University, Wuhan, 430200, Hubei, People’s Republic of China'. The original article has been corrected. © Donghua University, Shanghai, China 2025.

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