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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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Improving the electrochemical performance of Prussian-Blue-analogue cathode by the co-doping of cobalt and nickel and its application in aqueous hybrid ions battery

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Electrochimica Acta 2025年 528卷

作者： Lin, Dian Hua, Ruiqing Yang, Hongwei Xu, Caiyun Yang, Sheng Chen, Jiajun Qu, Deyu Li, Xi Liu, Dan Department of Chemistry School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology 122 Luoshi Road Hubei Wuhan430070 China State Key Laboratory of Advanced Technology for Material Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology 122 Luoshi Road Hubei Wuhan430070 China

Prussian blue and its analogues are promising electrode materials for the potassium ion batteries due to their large interstitial sites and three-dimensional porous framework. In this work, a series of Ni-co-doped Prussian blue analogues, Ni-Co hexacyanoferrate (NixCoyHCF), with various Ni/Co ratios are synthesized. Through the electrochemical investigation, the Prussian blue analogue with optimized ratio of Co and Ni coordinated with the CN, the NixCoyHCF materials exhibit enhanced performance as compared with that of the corresponding undoped counterparts. Specifically, the Ni1Co1HCF material delivers a high initial capacity of 101.6 mAh g-1 with a capacity retention of close to 100 % after 250 cycles, which reflects excellent cycle stability. Moreover, the Ni1Co1HCF material has excellent rate capability compared to NiHCF material. The capacity of the Ni1Co1HCF material under high current 2000 mA g-1 is >86.5 % of that under 50 mA g-1. After pairing with zeolite template carbon (ZTC) anode, the full cell provides an operational voltage of 1.60 V, a capacity of 54 mAh g-1 at 100 mA g-1, and 75.7 % capacity retention at 2000 mA g-1 along with the low self-discharge rate. © 2025

关键词： Semiconductor doping

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Tris-based protic ionic liquids with multiple adsorption effects enabling excellent anti-wear and anti-corrosion performances

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Journal of Molecular Liquids 2025年 425卷

作者： Ge, Shanqin Chen, Long Li, Wei Cai, Qingzhao Gong, Genxiang Wu, Junhao Yu, Jinhong Nishimura, Kazuhito Jiang, Nan Cai, Tao School of Materials Science and Chemical Engineering Ningbo University Zhejiang Ningbo315211 China State Key Laboratory of Advanced Marine Materials Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo315201 China Advanced Nano-processing Engineering Lab Mechanical Engineering Kogakuin University Tokyo192-0015 Japan

Molecular additives have garnered widespread attention in the fields of lubrication and corrosion protection due to their designable interfacial film-forming efficiency. Herein, three protic ionic liquids (PILs) with the same cation but different anions have been designed and synthesized. Their physicochemical properties, tribological properties and anti-corrosion properties were systematically investigated. Results demonstrated that under dynamic steel-on-steel friction conditions, the PILs can maximally reduce the running-in period, friction coefficient, and wear rate by 90 %, 40 %, and 97 %, respectively, compared to the commercial ionic liquid, BMIMPF6. Under static copper corrosion conditions, the PILs efficiently adsorb onto the copper surface and formed a dense oxide layer on its surface, thus achieving excellent corrosion protection for the copper substrates. Molecular dynamics (MD) simulation results indicate that the exceptional lubricity of PILs is due to its ability to rapidly adsorb onto the metal surface through multiple interaction sites on both its anionic and cationic components, thereby reducing the running-in period and swiftly establishing a lubricating film. This study provides insights into the development of molecular additives featuring multiple adsorption sites, with potential applications in the fields of tribology and corrosion engineering. © 2025

关键词： Tribology

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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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Facet Engineering of Metal-Organic Frameworks for Triboelectric Nanogenerators-Based Self-Powered Water Splitting

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advanced materials 2025年第0期 e2415616页

作者： Kuang, Tairong Deng, Linbing Liu, Mingjin Ding, Yutong Guo, Wei Cai, Zhao Liu, Wenxian Huang, Zhao-Xia Lab State Key Laboratory of Advanced Separation Membrane Materials College of Materials Science and Engineering Zhejiang University of Technology Hangzhou310014 China National Engineering Research Center of Novel Equipment for Polymer Processing Key Laboratory of Polymer Processing Engineering Ministry of Education Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing Department of Mechanical and Automotive Engineering South China University of Technology Guangzhou510641 China Faculty of Materials Science and Chemistry China University of Geoscience Wuhan430074 China

Metal-organic frameworks (MOFs) are highly versatile materials with tunable chemical and structural properties, making them promising for triboelectric nanogenerators (TENGs) and electrocatalysis. However, achieving precise control over MOF coordination structures to optimize facet-dependent properties remains challenging. Here, a facile and scalable dual-solvent synthesis strategy is presented to fabricate dendrite Co-2-methylimidazole MOF (ZIF-67-D), enabling tailored preferred facet and coordination environments. Using density functional theory (DFT) calculations and synchrotron-based X-ray absorption spectroscopy, it is demonstrated that ZIF-67-D, enriched with (112) facets, features a reduced Co coordination number and enhanced electron-donating ability compared to the conventionally (011) facet-dominated rhombic dodecahedron ZIF-67 (ZIF-67-R). This facet engineering boosts TENG charge density by 2.4-fold, OER current density by 9.9-fold (@1.65 V), and HER current density by 1.9-fold (@-0.3 V). The (112)/(011) facet ratio can be also tuned to precisely alter TENG output. Moreover, the optimized ZIF-67-D shows excellent stability, maintaining electrolyzer performance for 72 h and enabling TENG devices even in high humidity. Consequently, ZIF-67-D-based TENG (D-TENG) devices exhibit robust energy generation and power ZIF-67-D||ZIF-67-D electrolyzers for continuous hydrogen (H2) production. These findings introduce a new paradigm for converting mechanical energy into sustainable chemical energy, offering insights into facet engineering for high-performance energy harvesting systems. © 2025 Wiley-VCH GmbH.

关键词： Electrocatalysis

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

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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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Local structural origin of relaxor antiferroelectric behavior in NaNbO3-based ceramics

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Chemical Engineering Journal 2025年 514卷

作者： Meng, Xiangyu Yuan, Liran Li, Dongxu Wang, Pengbin Guo, Qinghu Gan, Xiaoyan Yao, Zhonghua Liu, Hanxing Wu, Jinsong Zhang, Shujun Hao, Hua State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies Foshan Xianhu Laboratory Foshan528200 China Nanostructure Research Center Wuhan University of Technology Wuhan430070 China Institute for Superconducting and Electronic Materials Faculty of Engineering and Information Sciences University of Wollongong WollongongNSW2500 Australia

Relaxor-antiferroelectrics (relaxor-AFEs), known for their double polarization–electric field (P-E) hysteresis loops and relaxor characteristics, exhibit outstanding energy storage performance compared to other dielectric materials. However, the origins of their antiferroelectric-like behavior and relaxor features remain unclear due to their complex local structure. In this study, we designed relaxor-AFEs with a high degree of relaxor component and stable antiferroelectric behavior. The recoverable energy density (Wrec) of up to 4.6J/cm3 and energy efficiency of ∼ 79 % were achieved in a 0.76NaNbO3-0.16Na0.5Bi0.5TiO3-0.08CaTiO3 ceramic, demonstrating excellent thermal and frequency stability. The multiphase local polarization configuration was confirmed by atomic-resolution annular dark-field scanning transmission electron microscopy (ADF STEM). Additionally, integrated differential phase contrast (iDPC) images revealed an enhanced antiferrodistortion (AFD) induced by incorporating component with low tolerance factor, contributing to stable antiferroelectric behavior. The relationship between chemical heterogeneity, polarization configuration and energy storage performance was systematically established. This work provides insights into the structure origin and underlying mechanisms for relaxor-AFE performance, with potential implications to guide the development of advanced energy-storage dielectric materials. © 2025 Elsevier B.V.

关键词： Antiferroelectric materials

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Effects of Phosphorus Additions on Microwave Sintering Properties of Uitrafine WC-10Co Cemented Carbides

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Journal of Wuhan University of technology(materials Science) 2007年第4期22卷 725-727页

作者：全峰周建 State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology State Key Lab of Advanced Technology for Materials Synthesis and Processing Wohan University of Technology

Using the microwave sintering technology, the effects of phosphorus （P） additions on the microstructure and properties of the ultrafine WC-10Co alloys were investigated. The experimental results show that with only 0.3wt% P additions, full density WC-10Co cermets were obtained at temperature of 1250℃, which is 70 ℃ lower than that of the undoped counterparts. Lower sintering temperature can result in finer WC grain growth; therefore, the P-doped WC-10Co alloys exhibited higher hardness than the undoped ones. But at the same time, P doping could lead to sacrifice of fracture toughness ofWC-10Co cemented carbides.

关键词： microwave sintering cemented carbides ultrafine hardmetals phosphorus grain growth inhibitor

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Synergistic p-doping and interface passivation of P3HT by oxidized organic small molecules toward efficient and stable perovskite solar modules

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Journal of Energy Chemistry 2025年 108卷 477-484页

作者： Pin Lv Yuxi Zhang Wen Liang Tan Junye Pan Yanqing Zhu Jiahui Chen Bingxin Duan Peiran Hou Min Hu Christopher R. McNeill Jianfeng Lu Yi-Bing Cheng State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 Hubei China Department of Materials Science and Engineering Monash University Clayton Victoria 3800 Australia Australian Synchrotron Australian Nuclear Science and Technology Organization (ANSTO) Clayton Victoria 3168 Australia School of Electronic and Electrical Engineering Hubei Province Engineering Research Center for Intelligent Micro-Nano Medical Equipment and Key Technologies Wuhan Textile University Wuhan 430200 Hubei China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 Hubei China

Poly(3-hexylthiophene) (P3HT) is one of the most promising hole-transporting materials in the pursuit of efficient and stable perovskite solar cells due to its outstanding stability and low cost. However, the intrinsic low carrier density of P3HT and poor contact between the P3HT/perovskite interface always lead to a low performance of the solar cell, while conventional chemical doping always makes the films unstable and limits the scalability. In this work, for the first time, we simultaneously enhanced the hole transporting properties of P3HT film and the interface of perovskite by doping it with a judiciously designed oxidized small molecule organic semiconductor. The organic salt not only can promote the lamellar crystallinity of P3HT to obtain better charge transport properties, but also reduce the defects of perovskite. As a result, we achieved champion efficiencies of 23.0% for small-area solar cells and 18.8% for larger-area modules (48.0 cm 2 ). This efficiency is the highest value for P3HT-based perovskite modules. Moreover, the solar cells show excellent operational stability, retaining over 95% of their initial efficiencies after 1200 h of continuous operation.

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Side-chain sterically induced directional units construct stable and continuous ion transport channels for anion exchange membranes

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Journal of Membrane Science 2025年 729卷

作者： Zhang, Zhe Zhao, Shengqiu Liao, Yucong Li, Yao Liu, Bingxuan Xiao, Zhengrui You, Zeqi Tian, Tian Zhang, Lan Chan, Siew Hwa Tang, Haolin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China National Energy Key Laboratory for New Hydrogen-ammonia Energy Technologies Foshan Xianhu Laboratory Foshan528200 China Hubei Key Laboratory of Fuel Cells Wuhan University of Technology Wuhan430070 China School of Mechanical and Aerospace Engineering Nanyang Technological University Singapore 639798 Singapore

Improving the hydroxide conductivity and dimensional stability of anion exchange membranes (AEMs), while retaining their high alkaline stability, is essential for AEM water electrolysis (AEMWE). Herein, a novel design strategy is proposed for perfluorinated ionomer by introducing sterically induced directional units (SIDUs) at the termini of pendant side chains to achieve superior performance in both conductivity and stability. The design is centered on introducing an appropriate amount of rigid bulk benzyl groups based on fluorinated ionomer segments to driven the directional aggregation of cationic groups, thus enabling the construction of continuous and stable ion transport channels. The resulting Perfluorinated-tribenzyls AEM (PFTQ), by forming continuous and stable ionic channels that significantly enhance OH− and H2O mobility, exhibit an over 46 % and 65 % increase in self-diffusion coefficient compared to Perfluorinated-propyl AEM (PFPQ), achieving an exceptional conductivity of 167 mS cm−1 at 80 °C with a swelling ratio as low as 19 %. Moreover, the robust C–F bond backbone, coupled with the protective effects of SIDUs through electron-donating and steric hindrance on the cationic groups, allows the PFTQ with negligible degradation at 80 °C in 6 M KOH over 400 h. Based on this rational design, we achieved a high alkaline water electrolysis performance of 3.6 A cm−2 at 2.0 V and demonstrated durability of over 500 h at 1 A cm−2 at 80 °C. This study demonstrates that the AEM design strategy based on the introduction of SIDUs has significant potential in achieving excellent energy efficiency and extended stability for electrolyzers. © 2025 Elsevier B.V.

关键词： Potassium hydroxide

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