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Fast-charging dual-electrode-less battery enabled by a solution-to-solid conversion chemistry in molten salts

Nano Energy 2025年 141卷

作者： Zhang, Meng Han, Kang Wang, Yu Zhang, Hao Tong, Xin Huang, Junling Wu, Xiaolin Guo, Changyuan Wang, Xuanpeng Meng, Jiashen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Department of Physical Science & Technology School of Physics and Mechanics Wuhan University of Technology Wuhan430070 China Hubei Xiangyang441000 China Co. Ltd High Technology Industrial Development Zone No. 60 Xuelan Road Henan Zhengzhou450001 China

Rechargeable aluminum batteries (RABs) have gained significant interest because of the low cost, abundant availability, and high capacity of aluminum metal (Al). To overcome excessive aluminum usage and slow solid-to-solid reaction rates in conversion-type cathodes, we present a fast-charging dual-electrode-less battery that utilizes solution-to-solid conversion chemistry at both electrodes within molten salt electrolytes. The activated carbon cloth (ACC) scaffolds, characterized by a high surface area, ample voids, and a strong structural framework, serve as current collectors on both the cathode and anode sides to facilitate their solution-deposition reactions. In symmetric cells, the ACC-based aluminum composite anode demonstrates lower overpotential, minimal dendrite formation, improved rate capability, and a longer cycling lifespan compared to a pure aluminum anode. Experimental results indicate a highly reversible solution-to-solid conversion reaction between soluble InCl and solid InCl3 on the cathode side, ensuring rapid solution-to-solid conversion kinetics and a self-healing structural property. The designed dual-electrode-less battery shows a low overpotential of 170 mV and a high discharge capacity of around 2 mAh cm−2 at 1 mA cm−2, fast-charging capability and good cycling stability with a capacity retention rate of 80 % after 350 cycles at a high charging rate of 10 mA cm−2. © 2025 Elsevier Ltd

关键词： Salts

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Defect recognition of circumferential welds of pipelines in TOFD images based on YOLOv5

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Hanjie Xuebao/Transactions of the China Welding Institution 2025年第4期46卷 22-31页

作者： Xu, Cheng Dong, Shihao Ou, Zhengyu Han, Zandong State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment Department of Mechanical Engineering Tsinghua University Beijing100084 China Key Laboratory for Advanced Materials Processing Technology Ministry of Education Department of Mechanical Engineering Tsinghua University Beijing100084 China Training Base of Army Engineering University Xuzhou221004 China

In order to enhance defect recognition in time-of-flight diffraction (TOFD) scan images for circumferential welds of pipelines under conditions such as background signal interference and uneven sample distribution, an improved YOLOv5s network model was proposed. In view of the defects with irregular shapes in TOFD images for circumferential welds of pipelines, deformable convolutions were introduced, enabling the network to adapt to the shape characteristics of defects and improving the feature extraction capability for irregular defects in TOFD images. To study the influence of interference waveforms such as direct wave and bottom wave on defect recognition in TOFD images, self-attention mechanisms were incorporated at different depths of the network, guiding the network to focus on subtle defect features while effectively suppressing the impact of interface waves on defect recognition. Furthermore, to tackle the issue of class imbalance in real-world defect samples, the SlideLoss loss function was employed to replace the original loss function, thereby enhancing the recognition accuracy for crack-type defects with limited sample sizes. Comparative experiments demonstrate that the improved network effectively suppresses complex background interference in TOFD images and improves defect recognition efficiency under imbalanced sample conditions. Compared to those of the original network, the overall mean average precision (mAP) and the average precision (AP) for crack-type defects have increased by 8.2% and 7.3%, respectively. © 2025 Harbin Research Institute of Welding. All rights reserved.

关键词： Image enhancement

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Effect of Y2O3-Al2O3 sintering additive content on the properties of porous Si3N4 ceramics prepared by digital light processing using Polymethyl methacrylate as pore-forming agent

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Ceramics International 2025年

作者： Wu, Ya-Ru Huang, Hai-Lu Tian, Chong Wu, Jia-Min Liu, Chun-Lei Guo, Lin Cai, Wei-Hao Yang, Ling-Hao Liu, Zhi-Wei Zhang, Yang-Ze Luo, Zhi-Cong Su, Sen Shi, Yu-Sheng State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China Engineering Research Center of Ceramic Materials for Additive Manufacturing Ministry of Education Wuhan430074 China Wenzhou Key Laboratory of Microwave Communication Materials and Devices Wenzhou Advanced Manufacturing Institute of HUST Wenzhou325035 China

Porous Si3N4 ceramics have been widely used in aerospace and military industry due to their excellent mechanical properties. Digital light processing (DLP) technology offers an effective route to prepare porous Si3N4 ceramics. In this paper, porous Si3N4 ceramics were successfully fabricated by DLP technology using Polymethyl methacrylate (PMMA) as pore-forming agent, and the effects of the sintering additive (Y2O3-Al2O3) content on the properties of Si3N4 ceramic slurry, green bodies and sintered parts were systematically studied. With the increase of sintering additive content from 2 wt% to 14 wt%, the viscosity of the Si3N4 slurry decreased and the cure depth of that increased. It was found that Y2O3 in sintering additives could induce the growth of β-Si3N4 grain and the fracture mode of Si3N4 ceramics changed from transgranular fracture to intergranular fracture gradually. Additionally, the porosity of porous Si3N4 ceramics first decreased and then increased, while the bulk density, flexural strength of the sintered samples first increased and then decreased with the increase of the sintering additive content. When the content of Y2O3-Al2O3 sintering additives was 10 wt%, the flexural strength of the Si3N4 ceramics reached the maximum value of 459.38 MPa. This research is of great significance for the mechanical property improvement of porous Si3N4 ceramics prepared by DLP. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Machinability

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Interaction of the Initial β-Mg17Al12 Phase with α-Matrix Grains in the AZ91 Magnesium Alloy During Hot Extrusion

SSRN

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SSRN 2025年

作者： Zhao, Dijia Shao, Yuman Lü, Shulin Yan, Zhaoxiang Guo, Wenbo Li, Shilong Li, Jianyu Xu, Shiwei Wu, Shusen Nie, Jianfeng State Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan430074 China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University Changsha410082 China Department of Materials Science and Engineering Monash University VIC3800 Australia

Secondary phase particles in magnesium alloys can facilitate particle-stimulated nucleation and pinning the grain boundary migration during the dynamic recrystallization (DRX) process. But a conflict exists between these two effects. By optimizing the hot extrusion process and preserving the irregular island-shaped β-Mg17Al12 phase (β-phase) derived from the eutectic reaction in the AZ91 magnesium alloy billet, we revealed the interaction of the initial β-phase with the α-matrix during extrusion. In the early stages of extrusion, the irregular, island-shaped, coarse β-phase causes significant dislocation accumulation in the adjacent α-matrix due to the hardness difference. As dislocations accumulate, the β-phase fragments and transforms into spindly fibrous bands, effectively illustrating a pinning effect. The morphological change of the β-phase not only promotes the DRX process but also inhibits the growth of DRXed grains, thereby refining the grain size. This research helps to expand the design strategies for extruded magnesium alloys. © 2025, The Authors. All rights reserved.

关键词： Magnesium alloys

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Long lifespan Li-Se battery: Advances, challenges and prospects

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Journal of Energy Chemistry 2025年 102卷 712-733页

作者： Hongyan Li Thomas L. Madanu Tarek Barakat Wen-Da Dong Alexandru Vlad Xikun Zhang Cheng-Bin Jin Yu Li Bao-Lian Su College of Materials and Chemistry China Jiliang University Hangzhou 310018 Zhejiang China Laboratory of Inorganic Materials Chemistry (CMI) Namur Institute of Structured Matter (NISM) University of Namur 61 rue de Bruxelles B-5000 Namur Belgium State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430074 Hubei China Institute of Condensed Matter and Nanosciences Molecular Chemistry Materials and Catalysis Université catholique de Louvain Louvain-la-Neuve Belgium

Lithium-selenium (Li-Se) batteries have attracted increasing attention as one of the next-generation battery systems due to much higher electronic conductivity and comparable volumetric capacity of Se compared to the popular sulfur cathode. However, its practical application still faces great challenges, especially the rapid capacity decay triggered by the loss of active Se species. A comprehensive review to uncover the in-depth failure mechanism and provide targeted solutions to promote the stable operation of Li-Se batteries is urgently needed. This review systematically summarizes the strategies in the new perspective, focusing on the optimization of Se utilization in Li-Se batteries by keeping a high Se maintenance in the cathode and accelerating the electrochemical kinetics of lithium polyselenides (LiPSe) conversion. On the basis of structural design and Li 2 Se active material introduction to accommodate volume expansion, blocking shuttle transport of LiPSe by physical/chemical adsorption, bonding Se with polymers or cathode electrolyte interphase (CEI) construction, and catalytic design to accelerate the conversion of LiPSe, different strategies for improving the utilization of Se have been evaluated and discussed. To address the inevitable loss of Se, prospects on inactive Se reactivation and Li protection are detailedly proposed and analyzed referring to the chemistry and corrosion science. Additionally, the perspectives on the future design and comprehensive parameter evaluations for the optimization of Li-Se batteries are recommended. This review comprehensively explains the causes and solutions of capacity fading and provides potential efforts for lifespan expansion of batteries, shedding light on the future development of Li-Se batteries.

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Revealing Effect of Aggregation Structure of Plant Precursors on Rate Performance of Carbon Anode for Sodium-Ion Batteries

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advanced Functional materials 2025年

作者： Zhang, Tianyun Zhang, Tian Zhao, Changhong Wang, Fujuan Zhang, Lirong Li, Yu Zhang, Liyu Ran, Fen School of Mechanical and Electronical Engineering Lanzhou University of Technology Lanzhou730050 China State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730500 China

Plant-based hard carbon is a highly promising anode material for sodium-ion batteries. Numerous studies have dedicated significant effort to the selection of precursors;however, there has been limited comprehensive research on the low-rate performance of plant-based hard carbon. Indeed, the aggregated structure of cellulose and hemicellulose in precursors has been underestimated regarding its influence on the material properties. In this study, the inherent aggregated structure of kapok fiber is optimized. It has been observed that the aggregation structure of the precursor significantly influences the content of highly disordered carbon post-carbonization, consequently impacting the rate performance of the derived anode material. To address the problems, aluminum ions innovatively are used to support the crushed cellulose-hemicellulose arrays, and the prepared carbon anode has a capacity retention rate of up to≈70% at a current density increased from 0.05 to 3.2 A g−1. This research not only clarifies the mechanism by which the structure leads to the decline of rate performance but also innovatively introduces the ion coupling method to repair the structure, thereby achieving the optimization of rate performance. © 2025 Wiley-VCH GmbH.

关键词： aggregation structure kapok fibers plant precursors rate performance sodium-ion batteries

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NiTi alloys with simultaneous equiaxed-grain strength and columnar-grain ductility manipulated by direct energy deposition

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Journal of Alloys and Compounds 2025年 1028卷

作者： Lu, Jiaqi Zhang, Chi Liu, Yang Huang, Zhifeng Hou, Huilong Huang, Aijun Chen, Fei State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China International School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Hubei Longzhong Laboratory Xiangyang441106 China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou521000 China School of Materials Science and Engineering Beihang University Beijing100191 China Hangzhou310023 China Monash University Notting HillVIC3168 Australia

NiTi alloys prepared by additive manufacturing (AM) often have coarse columnar grains showing poor tensile superelasticity, strength, and ductility, significantly impairing part qualification and targeted applications. In this work, we used laser-engineered net shaping (LENS) to fabricate NiTi alloys with lamellar structures which consist of fine nearly equiaxed grains, columnar grains, and high-density dislocations, through periodically alternating processing parameters. This strategy can partially keep the equiaxed grains produced by the transformation from columnar grains to equiaxed grains (CET) at the top of the deposited layer, and interrupt the epitaxial growth of columnar grains in AM-ed NiTi alloys. The results show that NiTi alloys with lamellar structures exhibit an excellent combination of strength and ductility with a tensile strength of 649 MPa strain of 17.5 %, a maximum recovery strain of 5.3 %, and a stable recovery strain of 3.1 % after 20 cycles. Our findings may increase the range of adjustable microstructures and combinations of properties in NiTi alloys and provide a new idea for microstructure modification and reinforcement of AM shape memory alloy. © 2025 Elsevier B.V.

关键词： Tensile strain

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ZrO2-CPS/ZrO2 graded composite ceramics with high osteoinductivity for dental implants fabricated by stereolithography

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Ceramics International 2025年

作者： Wu, Jiaxin Li, Zhi Meng, Xingliang Cheng, Bo Yang, Jing Li, Binbin Wang, Xinyu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan528200 China Hainan Institute Wuhan University of Technology Sanya572000 China Biomedical Materials and Engineering Research Center of Hubei Province Wuhan University of Technology Wuhan430070 China School of Foreign Languages Wuhan University of Technology Wuhan430070 China Department of Stomatology Zhongnan Hospital of Wuhan University Wuhan430060 China

Promoting mechanical strength and osteoinductivity properties is crucial for dental implants materials. Herein, we synthesized silicocarnotite (CPS) powder via a hydrothermal method, and mixed it with zirconia to create a composite material for preparing four slurries: xCPS-(1−x)ZrO2 (x = 0, 1/6, 1/3, and 1/2 vol%). The optimal printing parameters for each slurry were investigated. Following the printing of the slurries, debinding was performed on them in the temperature range of 25 °C–600 °C in nitrogen atmosphere and 600 °C–1000 °C in air atmosphere, respectively, followed by sintering at 1350 °C for 2 h. The graded zirconia-based composite ceramics prepared using stereolithography (SLA) exhibited excellent mechanical properties, including a flexural strength of 742.37 ± 22.52 MPa, Vickers hardness of 7.29 ± 0.15 GPa, fracture toughness of 5.34 ± 0.29 MPa m1/2, and a relative density of 96.3 %. Compared with zirconia ceramics, the graded composite ceramics displayed higher surface roughness. The graded composite ceramics degraded and released Ca, Si, and P ions, promoting MC3T3-E1 cells proliferation, adhesion, and osteogenic differentiation. These findings suggest that ZrO2-CPS/ZrO2 graded composite ceramics synthesized via SLA holds great potential as dental implants with high osteoinductivity. © 2025

关键词： Fracture toughness

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Full-Scaling Friction and Wear Laws of Nanotwinned Metals

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Physical Review Letters 2025年第16期134卷 166201-166201页

作者： Yan Lin Ziyue Zhang Fenghui Duan Fangming Wang Fei Liang Qicheng Zhang Yong Li Jie Pan Keke Chang Yonghao Zhao Yuntian Zhu Xiang Chen Nano and Heterogeneous Materials Center School of Materials Science and Engineering Nanjing University of Science and Technology Nanjing China Department of Materials Science and Engineering City University of Hong Kong Hong Kong China State Key Laboratory of Advanced Marine Materials Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo China State Key Laboratory of Material Processing and Die and Mould Technology and School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan China School of Materials Science and Engineering Hohai University Changzhou China

Ultrastrong nanotwinned (NT) metals hold promise for mitigating friction and wear—essential for enhancing the energy efficiency and longevity of all moving systems. However, optimizing their tribological performance has long suffered from the absence of friction and wear laws across varying tribological loading scales. Here, we have discovered full-scaling twin lamella spacing (λ)-dependent friction and wear laws in NT pure nickel and identified critical deformation mechanisms for reducing friction and wear. Nanoscale friction initially increases with decreasing λ, peaking at 20 nm, and then decreases due to a transition from dislocation-twin boundary interactions to detwinning. Under microscale loading, friction and wear reduce linearly with decreasing λ, attributed to an unforeseen phase transition from face-centered cubic to hexagonal close-packed structures. Furthermore, under macroscale loading, the formation of a durable oxide layer and a stable gradient nanostructure in nanotwinned nickel with λ exceeding 20 nm aids in mitigating wear loss.

关键词： Nickel

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Ionic Liquid-Grafted Mxene Composite Polymer Electrolytes for High-Performance Solid-state Batteries

SSRN

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SSRN 2025年

作者： Li, Yu Qian, Zhi Qiu, Zhao-Dong Wang, Rui-Qing Wei, Mei-Tong Fei, An-Min Hu, Zhi-Yi Mohamed, Hemdan S.H. Chen, Li-Hua Su, Bao-Lian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Wuhan University of Technology Wuhan430070 China Physics Department Faculty of Science Fayoum University El Gomhoria Street Fayoum63514 Egypt University of Namur NamurB-5000 Belgium

All-solid-state batteries (ASSBs) have obtained much attention due to the high energy density and security. At present, PEO-based solid-state batteries are considered to be one of the most promising candidates for high-performance ASSBs due to the excellent processability and good interfacial stability. However, low ionic conductivity and Li+ transference number seriously hinder their progress in practical applications. Here, a novel filler is developed by embedding ionic liquid (IL) grafted onto the surface of MXene to improve the electrochemical performance of PEO-based solid composite polymer electrolyte (MXene-IL-SPE) for ASSBs. The 2D MXene can significantly reduce the crystallinity of PEO, and the presence of IL not only enhances the dispersion of MXene in the polymer matrix, but also promotes the dissociation of lithium salts and anchors anions. As a result, the MXene-IL-SPE possesses high ionic conductivity (7.19 × 10-4 S cm-1) and Li+ transference number (0.51), together with wide electrochemical window (5.2 V) at 60 °C. The assembled LiFePO4|MXene-IL-SPE|Li full cell exhibits remarkable rate capability and exceptional capacity of 154.8 mAh g-1 over 120 cycles with an impressive 95.3% capacity retention at 0.5 C. This design opens up a new way to prepare high performance CPEs for ASSBs. © 2025, The Authors. All rights reserved.

关键词： Solid-state Batteries

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