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Direct Regeneration of Degraded High-Nickel Layered Cathode with a Grain-Growth Inhibitor by Epitaxial Boundaries

advanced Functional materials 2025年

作者： Chen, Xingye Su, Jun Liu, Weizheng Wang, Juan Liu, Yuxin Li, Dongqi Zhang, Yixin Zeng, Weihao Zhang, Shaojie Li, Zhongpeng Wang, Xuanpeng Mu, Shichun State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China National-Provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology Wuhan University of Science and Technology Wuhan430081 China Co. Ltd Zhengzhou45000 China

The direct regeneration of degraded cathode materials for lithium-ion batteries holds significant promise for closed-loop recycling. However, fully recovering the structure and performance of degraded LiNixCoyMnzO2 (NCM) cathodes remains a significant challenge, limiting its practical applications. Here, this study uncovers that the regrowth of primary grains is a critical factor leading to microstructural rearrangement and grain boundary reformation, which compromises the performance of regenerated polycrystalline NCM materials. Therefore, to inhibit excessive grain growth, an epitaxial Li3Ni2NbO6 grain boundary is successfully incorporated into the regenerated NCM (Nb-R-NCM) through a niobium (Nb)-assisted eutectic method, which preserves structural integrity and minimizes cationic disorder. Additionally, the Li3Ni2NbO6 epitaxial layer relieves internal strains of NCM, thereby mitigating the lattice expansion and contraction during charging and discharging processes. All these are conducive to the high-voltage stability of Nb-R-NCM. As expected, it demonstrates a high capacity of 183.13 mAh g⁻¹ at 0.1 C comparable to commercial NCM materials, and even maintains stable cycling with 83.4% retention over 300 cycles at 1C in the voltage range of 3.0–4.5 V. This work presents a constructive approach for the direct regeneration of ternary cathode materials, paving the way for enhanced practicality and performance in sustainable energy applications. © 2025 Wiley-VCH GmbH.

关键词： Lithium-ion batteries

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Compatible matching and synergy operation optimization of hydrogen-electric hybrid energy storage system in DC microgrid

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Energy Conversion and Management: X 2025年 26卷

作者： Du, Banghua Peng, Yanyu Li, Yang Xie, Changjun Zhu, Shihao Zhu, Wenchao Yang, Yang You, Li Zhang, Leiqi Zhao, Bo Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China School of Automation Wuhan University of Technology Wuhan430070 China Department of Electrical Engineering Chalmers University of Technology Gothenburg41258 Sweden State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan430070 China State Grid Hubei Electric Power Research Institute Wuhan430077 China State Grid Zhejiang Electric Power Research Institute Hangzhou310014 China

Hydrogen energy storage (HES) systems could balanced source-load mismatches in DC microgrids. By combining HES with electrical energy storage (EES), the start-up delay and rapid degradation of HES under fluctuating inputs can be mitigated, enhancing system adaptability. However, without proper power allocation and operational optimization, system efficiency and the lifespan of HES and EES decrease. Accordingly, this paper proposes a compatible matching and synergy operation optimization for hydrogen-electric hybrid energy storage systems (H-E HESS). Firstly, Complete Ensemble Empirical Mode Decomposition with Adaptive Noise (CEEMDAN) is developed to decompose power fluctuation signals into frequency components, and the Hilbert transform calculates the energy value to determine high- and low-frequency dividing points. Next, a system power allocation strategy is formulated through the fast response of the EES to compensate for the delay in the start-up of the HES. A multi-objective optimization model is then developed to balance efficiency and lifespan, which is solved by the NSGA-III algorithm. Finally, case studies show that the proposed strategy improves efficiency by 17.95 % and 8.34 %, reduces degradation rates by 1 % and 0.71 %, and shortens system response time in 1 s, compared to Schemes I and II. The strategy's effectiveness is also validated through an experimental platform in a hydrogen-electric coupled DC microgrid demonstration project. © 2025 The Author(s)

关键词： Hydrogen storage

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Transmittance improvement and photocatalyst performance of complex environment tolerant SiO2-TiO2 thin film on photovoltaic glass

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Ceramics International 2025年

作者： Liu, Jiacheng Zhang, Mengya Zhang, Jihong Zhang, Qinghuang Han, Jianjun Xie, Jun Cao, Shaowen State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology 122 Luoshi Road Hongshan Hubei Wuhan430070 China Hepu Research Center for Silicate Materials Industry Technology 27 Huanzhu Avenue Hepu County Beihai536100 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Hongshan Hubei Wuhan430070 China

The transmittance and surface condition of photovoltaic cover glass determine the energy conversion efficiency of specific solar cells modulus. In this study, TiO2-SiO2 based complex thin film were fabricated on PV glass and the transmittance, self-cleaning, and environmental tolerance performances were investigated. TiO2-SiO2 based precursors with different SiO2 contents and additives were prepared using sol-gel method, and coated on photovoltaic glass substrates by spin-coating technique with optimized parameters for thin film fabrication. The microstructure analysis reveals the decreasing rutile TiO2 crystalline with higher SiO2 content in thin film probably due to lower TiO2 content and the formation of Ti-O-Si bond, which impedes TiO2 crystal growth. The morphologies and elements distribution of thin film proves the formation of SiO2/TiO2 core-shell like structure in thin film. The transmittance of coated photovoltaic glass in visible range is improved from 91.60 % to 93.94 %, with optimized TiO2/SiO2 ratio. Accordingly, the monocrystalline silicon solar cell conversion efficiency increases from 16.35 % to 16.68 %, about 0.33 % efficiency increase due to TiO2-SiO2 thin film coating. In addition, the thin film shows excellent photocatalyst behavior from 95.40 % methylene blue dye degradation rate under Xeon lamp irradiation, and super hydrophilic property from 0° contact angle, which confirms the excellent self-cleaning performance. The transmittance of coated photovoltaic glass recovers from less than 80 % with MB simulated pollutant contamination, to 92.97 % after degradation under Xeon lamp irradiation, and the solar cell conversion efficiency changes from 13.15 % to 16.55 %. In addition, the transmittance and solar cell conversion remain almost unchanged after low temperature freezing, and slightly decrease from first time sand scrubbing then keep stable with more cycles. The results indicate the excellent anti-pollution, low temperature tolerance, and wear

关键词： Energy conversion efficiency

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Sym- and Asym-Expanded Heterohelicene Isomers Featuring Extended Multi-Resonance Skeleton for Narrowband Deep-Blue Fluorescence

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Angewandte Chemie - International Edition 2025年第13期64卷

作者： Zeng, Xuan Luo, Xiaofeng Meng, Guoyun Wang, Xuewen Zhang, Dongdong Duan, Lian School of Chemistry Chemical Engineering and Life Science State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education Department of Chemistry Tsinghua University Beijing100084 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu hydrogen Valley Foshan528200 China Center for Flexible Electronics Technology Tsinghua University Beijing100084 China

Expanded heterohelicenes composed of alternating linearly and angularly fused multi-resonance (MR) skeletons have gained wide interest owing to their promising narrowband emissions. Herein, a pair of sym- and asym-expanded heterohelicene isomers was obtained by merging boron/oxygen (B/O)-embedded MR triangulene and indolo[3,2,1-jk]carbazole units via one-pot synthesis. Owing to their fully resonating extended helical skeleton, the target heterohelicenes exhibit a significantly narrowed spectra bandwidth while emission red-shifting, thus affording deep-blue narrowband emission with a peak at approximately 460 nm, full-width-at-half-maximum (FWHM) of only 18 nm, and near-unity photoluminescence quantum yields. In comparison to the symmetrical structure, the asym-expanded heterohelicene displays suppressed aggregation within doped films, thereby showing superior narrowband electroluminescence in devices with CIE coordinates of (0.12, 0.18) and a high external quantum efficiency of up to 25 %, which retains 18.1 % even at a high luminance of 10,000 cd m−1. Overall, this work provides a novel paradigm for the development of narrowband expanded heterohelicenes. © 2025 Wiley-VCH GmbH.

关键词： Electroluminescence

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Boosting oxygen evolution of LiCoO2 electrocatalysts via lithium defect

Materials Today Catalysis

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materials Today Catalysis 2025年 8卷

作者： Li, Huamei Li, Mengyuan Liao, Lingling Yang, Han Xiang, Kun Luo, Guoqiang Xie, Mingjiang School of Chemistry and Environmental Engineering Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Wuhan Institute of Technology Wuhan430205 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Hubei Key Lab for Processing and Application of Catalytic Materials College of Chemical Engineering Huanggang Normal University Huanggang438000 China

The challenge of the complex oxygen evolution reaction (OER) currently impedes the efficient production of hydrogen via electrolytic water splitting. To address this issue, the development and improvement of effective electrocatalysts are required. LiCoO2, a key material in lithium-ion batteries, has shown promising potential as an electrocatalyst for electrochemical energy conversion. However, OER catalysts derived from LiCoO2 have faced obstacles such as high overpotential and a complicated preparation process. In this study, the preparation method is adjusted to optimize the synthesis of Li1-xCoO2 with a defective structure, resulting in an impressive overpotential of only 290 mV at a current density of 100 mA cm−2 and a remarkable Tafel slope of 15.2 mV dec−1. The exceptional catalytic activity of Li1-xCoO2 can be attributed to the absence of Li, which triggers oxidative alterations in the electronic structure of Co. Density functional theory (DFT) calculations reveal that Li defects can influence the d-band center of active Co sites, enhancing the adsorption capabilities of Co sites towards *OOH intermediates and increasing the conductivity of the electrocatalyst during the OER process. These alterations improve the velocity of the crucial step in the reaction, ultimately boosting the catalyst's overall performance and efficiency. © 2024 The Authors

关键词： Lithium-ion batteries

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A numerical method for predicting bursting strength of composite rocket motor case considering filament winding process-induced stress

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Chinese Journal of Aeronautics 2025年第2期 509-522页

作者： Jiqiu LIANG Fei ZHAO Dan WU Anxin DING Hubei Key Laboratory of Advanced Aerospace Propulsion Technology System Design Institute of Hubei Aerospace Technology Academy School of Materials Science and Engineering Wuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

A numerical method to predict the bursting strength of filament wound composite rocket motor case is proposed here. This method can evaluate the longitudinal stress evolution of each composite layer as impregnated filaments with fiber tension are wound layer by layer, and consider the effects of accumulated stress and deformation during filament winding on the bursting strength of composite case. Taking ?520 mm composite cases as a case study, the filament-winding-processinduced stress and deformation as well as progressive damage behavior are numerically predicted,followed by a comparison with experimental results. The numerical results show that the predicted bursting pressures for composite cases manufactured on the mandrels with and without a flexible component are 14.20 MPa and 21.40 MPa, respectively. These values exhibit slight deviation from the measured pressures of 13.50 MPa and 21.57 MPa. Moreover, the predicted damage locations,situated respectively in the dome and cylinder, agree well with the experimental observation. These observations indicate that use of flexible component reduces the load-bearing capacity of the ***, it validates the reliability and accuracy of the proposed numerical method in predicting the bursting strength of composite cases.

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Interfacial Charge Transfer in ZnO/COF S-Scheme Photocatalyst via Zn─N Bond

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advanced materials 2025年 e2505088页

作者： Meng, Kai Zhang, Jianjun Zhu, Bicheng Jiang, Chuanjia García, Hermenegildo Yu, Jiaguo State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China Laboratory of Solar Fuel Faculty of Materials Science and Chemistry China University of Geosciences Wuhan430078 China College of Environmental Science and Engineering Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Remediation and Pollution Control Nankai University Tianjin300350 China Universitat Politècnica de València Valencia46022 Spain

Photocatalysis is a promising solution to global energy shortage and environmental problems. Inspired by photosynthesis, multicomponent heterostructured photocatalysts are extensively investigated, and step-scheme (S-scheme) heterojunction has emerged as the theoretical basis for delineating charge transfer processes in predominant heterostructured photocatalysts. However, the specific charge transfer pathway across an S-scheme heterojunction remains elusive from an atomic/molecular perspective. Herein, it is demonstrated that in S-scheme heterojunction photocatalysts composed of imine-based covalent organic frameworks and nanostructured zinc oxide, interfacial Zn─N bonds are formed between the two components and play critical roles as a charge transfer gateway in the S-scheme heterojunction, based on theoretical calculations, X-ray absorption spectroscopy, and X-ray photoelectron spectroscopy. Moreover, mechanisms for enhanced charge transfer across the S-scheme heterojunction are elucidated using femtosecond transient absorption spectroscopy. This work provides new insights into molecular-level understanding of charge transfer mechanisms in S-scheme heterojunction photocatalysts for promoting energy and environmental applications of artificial photosynthesis. © 2025 Wiley-VCH GmbH.

关键词： Transient absorption spectroscopy

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Ultra-rapid assembly of graphene oxide macroscopic materials enabled by low-surface-tension solvent

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Surfaces and Interfaces 2025年 67卷

作者： Zhang, Long Chen, Pengfei Wang, Zhe Feng, Hao Li, Peng Qian, Wei Fu, Huaqiang Chen, Cheng Shi, Zuhao Lv, Yong Li, Shuxin He, Daping State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Hubei Engineering Research Center of Radio Frequency Microwave Technology and Application School of Physics and Mechanics Wuhan University of Technology Wuhan 430070 China Hubei Key Laboratory of Theory and Application of Advanced Material Mechanics School of Physics and Mechanics Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 China

Two-dimensional (2D) nanomaterials assembled macroscopic materials via bottom-up approach are extensively utilized across various domains, attributable to their capacity to retain the desirable properties of individual nanosheets. However, the dense structure formed during assembly restricts solvent molecule passage, leading to prolonged preparation times. Traditional methods struggle to create larger and more solvent channels. Herein, we propose a strategy to achieve ultra-fast assembly of graphene oxide (GO) nanosheets by manipulating the solvent's surface tension to form a bouffant structure. This approach enables GO membrane assembly in only 10 s, which is 24,660 times faster than that of conventional water-based methods (over 2.85 days). Our analysis of solvents with varying surface tensions demonstrates that low surface tension, rather than solvent's relative molecular weight, significantly impacts the assembly rate. This rapid assembly process enables GO membranes to attain thicknesses of several centimeters, thereby overcoming the limitations of traditional bottom-up techniques. The resulting GO macro-materials exhibit considerable potential for diverse applications, from thin membranes for waste management to thick blocks for electromagnetic interference shielding and mechanical sensors. This work offers valuable insights into the rapid assembly of macroscopic structures from GO and potentially other 2D lamellar materials. © 2025

关键词： Graphene oxide Low surface tension Macroscopic material Solvent Ultra-rapid assembly

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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)

引用

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 laboratory 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 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, Wuhan, 430200, Hubei, People’s Republic of China'. The original article has been corrected. © Donghua University, Shanghai, China 2025.

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Industrial applicable, Be-Ni-free Y-doped Zr-based bulk metallic glasses with high glass-forming ability and superior mechanical properties

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Journal of Alloys and Compounds 2025年 1027卷

作者： Fu, X.Q. Li, C.Y. Gao, K. Zhu, X.G. Li, X.S. Pei, C.Q. Zhou, J. Kou, S.Z. Sun, B.A. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals School of Materials Science and Engineering Lanzhou University of Technology Gansu Lanzhou730050 China Songshan Lake Materials Laboratory Guangdong Dongguan523808 China Dongguan Yihao Metal Material Technology Co LTD Guangdong Dongguan523686 China

Zr-based bulk metallic glasses (BMGs) exhibit significant potential for a wide range of applications, owing to their exceptional glass-forming ability (GFA) and mechanical properties. However, while the addition of beryllium (Be) or rare-earth elements can improve the GFA of Zr-based BMGs, it often raises safety concerns or compromises their mechanical performance, limiting their industrial applicability. Therefore, the development of Be-Ni-free Zr-based BMGs with both superior GFA and mechanical properties remains a considerable challenge. In this study, we successfully prepared an industrially applicable Be-Ni-free (Zr61Ti2Cu25Al12)100-xYx BMG via Y-doping, demonstrating high GFA and excellent mechanical properties. We found that trace Y-doping significantly enhances both GFA and plasticity, with Y0.1 achieving a critical diameter of 13 mm and Y0.3 exhibiting a remarkable compressive strain of 18.91 %. Additionally, using the (Zr61Ti2Cu25Al12)100-xYx BMGs, we successfully fabricated industrial BMGs plates with thicknesses of 2 mm via high-vacuum, high-pressure die casting (HV-HPDC). The industrial BMGs plates of Y0.3 also exhibited the unexceptionable flexural strength of the 2.46 GPa. This work provides a novel approach for the exploration of BMGs for industrial applications and represents a significant step toward their commercialization and structural use. © 2025 Elsevier B.V.

关键词： Machinability

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