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Fabrication and application of binder-free cathodes in high-performance lithium-chalcogen (S, Se, Te) batteries: A review

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Chinese Chemical Letters 2024年

作者： Jing Liu Fei Wang Huijie Wei Yong Liu Xiaoliang Zhai Sifan Wen Qiaobao Zhang School of Materials Science and Engineering Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal new Materials and Advanced Processing Technology Henan University of Science and Technology Luoyang 471023 China Faculty of Engineering Huanghe Science & Technology University Zhengzhou 450063 China State Key Laboratory of Physical Chemistry of Solid Surfaces College of Materials Xiamen University Xiamen 361005 China Longmen Laboratory Luoyang 471023 China

advanced lithium-chalcogen (S, Se, Te) batteries (LCBs) are among the most promising candidates for next generation energy storage systems because of their high energy density and theoretical capacities. However, they are still facing many challenges, such as expansion of the volume problems of chalcogen elements, the shuttle effect of intermediate products, low Coulombic efficiency and inferior cycling stability, which seriously hinder their commercial applications. The presence of a binder in the cathode causes an uneven distribution of the active substances, and also occupies a part of the electrode's volume, resulting in the unsatisfactory energy density of LCBs. In this regard, binder-free electrodes which do not need binders, conductive materials and even collectors, can be used as electrodes for flexible batteries, effectively solving the above-mentioned problems. In this review, the main methods of fabricating binder-free cathodes and their advantages and disadvantages are discussed. Furthermore, a review of representative works on binder-free cathodes for high-performance LCBs over the last decade is presented. The main binder-free electrode materials include paper cloth (PC), graphene oxide (GO), carbon nanotubes (CNTs), carbon nanofibers (CNFs), carbon cloth (CC), polymers, metallic compounds, and their composites. In addition, we discuss these works from four aspects: advanced structures, methods of fabrication, electrochemical performance and the potential mechanism of binder-free cathode materials, providing important guidance for further researches. Finally, we propose the current challenges of binder-free LCBs and look forward to breakthroughs in this field through the use of binder-free electrodes.

关键词： Binder-free cathode Flexible Lithium-chalcogen batteries Li-S batteries Electrochemical performance

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PVDF/carbon directional microchannels-enhanced ion diode-like hydrogel-based pressure sensors

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Chemical Engineering Journal 2025年 516卷

作者： Xuezhong Wen Hongjian Zhang Taeuk Eom Chang Kyu Jeong Yong Zhang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 PR China Center for Smart Materials and Device Integration Wuhan University of Technology Wuhan 430070 PR China Division of Advanced Materials Engineering Jeonbuk National University Jeonju Jeonbuk 54896 Republic of Korea Department of JBNU-KIST Industry-Academia Convergence Research Jeonbuk National University Jeonju Jeonbuk 54896 Republic of Korea Department of Energy Storage/Conversion Engineering of Graduate School & Hydrogen and Fuel Cell Research Center Jeonbuk National University Jeonju Jeonbuk 54896 Republic of Korea

Hydrogels are promising candidates for flexible electronics but are often constrained by narrow pressure-sensing ranges and unstable ion migration. To overcome these limitations, we developed an ionic hydrogel sensor incorporating diode-inspired bipolar architectures (PSSNa/PDACl) and poly(vinylidene fluoride)/carbon directional microchannels (PCDMC). The optimized 5-PCNPC hydrogel exhibits a broad pressure-sensing range (2.3–100 kPa) with a sensitivity of 0.360 mV·kPa −1 (a 34.8 % enhancement) and a rectification ratio of 12.9, enabled by PCDMC-guided anisotropic ion transport and rapid stress dissipation (337 ms recovery). With excellent durability over 500 cycles and a power density of 1.17 mW·m −2 , the hydrogel sensor demonstrates its potential in practical applications, including a 5 × 5 touchpad for spatial pressure mapping and real-time monitoring of respiration, swallowing, grasping and locomotion. This study underscores the potential of hydrogel-based sensors with wide-range operability for next-generation wearables and interactive systems.

关键词： Carbon carbon composites

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Bridged Carbolong Modulating Interfacial Charge Transfer Enhancement for High-Performance Inverted Perovskite Solar Cells

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Angewandte Chemie 2024年第8期137卷

作者： Yang Yang Shiyan Chen Zhiyuan Dai Hang Wei Shuyuan Wan Yan Chen Jinhan Sun Prof. Zhe Liu Prof. Liming Ding Prof. Haiping Xia Prof. Ruihao Chen Prof. Hongqiang Wang Department State Key Laboratory of Solidification Processing Center for Nano Energy Materials School of Materials Science and Engineering Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU) Xi'an 710071 China Department of Chemistry Southern University of Science and Technology Shenzhen 518055 China Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology Beijing 100190 China

Efficient regulation of perovskite/C 60 interface is crucial to improving the long-term stability of the inverted perovskite solar cells (PSCs). However, precise methods for controlling the perovskite/C 60 interface have yet to be thoroughly explored. Herein, we develop a carbolong chemical manipulation strategy to improve the interface contact of perovskite/C 60 due to versatile functional groups and excellent optoelectronic properties of carbolong metallaaromatics. And constructing an electron-transfer bridge enhances the interfacial interaction and accelerates interfacial electron transfer. The carbolong manipulation results in optimized energy level alignment, suppressed nonradiative recombination, and improved electronic contact. An impressive efficiency of 25.80% is demonstrated, with open-circuit voltage and fill factor of 1.19 V and 84.53 %, respectively. The unsealed devices retain more than 98 % of their original efficiency after 1400 h of maximum power point tracking under illumination and demonstrate remarkable thermal stability, maintaining 93 % of their initial efficiency after 2500 h at 85 °C in a nitrogen atmosphere. And the encapsulated carbolong-modified module achieved a high efficiency of 20.72 % (active area of 25.25 cm 2 ) with robust operation stability.

关键词： Bridged carbolong modulation Dicarbolong-phenanthroline Interface charge transfer Inverted perovskite solar cells and modules

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In-situ precipitation enabled Bi/BiFeO 3 Schottky junction with an electronic tunnel for promoting photocatalytic ammonia synthesis

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Applied Catalysis B: Environment and Energy 2025年 378卷

作者： Zhaowu Zeng Yongchao Wang Xiaoyi Liu Bing He Jian Ding Zhen Li Panxing Zhu Huan Wang Yanli Zhao Yang Wang Faculty of Materials Science and Chemistry China University of Geosciences Wuhan 430074 PR China School of Chemistry Chemical Engineering and Biotechnology Nanyang Technological University Singapore 637371 Singapore State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan 430200 PR China

Metallic bismuth (Bi) has garnered significant attention in the field of photocatalytic nitrogen reduction owing to its remarkable nitrogen activation and hydrogen evolution inhibition. However, the effectiveness of Bi is still hindered by the electron transport obstruction caused by the Schottky junction between the semiconducting scaffolds. In this work, Bi metal nanoparticles were constructed on the surface of BiFeO 3 photocatalyst (Bi/BFO) by a simple in-situ precipitation method. The Bi nanoparticles prepared by this process not only provides sites for nitrogen adsorption/activation, but also facilitates the formation of a gradient doping of Fe 2 + produced by BFO during the precipitation process, effectively establishing an electronic tunnel at the interface of Bi and BFO. The improved Schottky junction with unidirectional electron transport provides sufficient electrons for nitrogen reduction at the Bi sites, and collaboratively enhances photocatalytic efficiency for nitrogen reduction. Consequently, the NH 3 yield of the optimized Bi/BFO reaches 202.5 μmol g − 1 h − 1 . This study presents an optimized approach for efficient implementation of Schottky junction in photocatalytic nitrogen reduction.

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Photo-assisted technologies for environmental remediation

Nature Reviews Clean Technology

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Nature Reviews Clean technology 2025年第3期1卷 1-15页

作者： Bo Weng Jiangquan Lv Ning Han Bao-Lian Su Maarten Roeffaers Johan Hofkens Yongfa Zhu Shaobin Wang Wonyong Choi State Key Laboratory of Advanced Environmental Technology Institute of Urban Environment Chinese Academy of Sciences Xiamen China University of Chinese Academy of Sciences Beijing China College of Electronics and Information Science Fujian Jiangxia University Fuzhou China Department of Electrical and Computer Engineering University of Toronto Toronto Canada Laboratory of Living Materials at the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China cMACS Department of Microbial and Molecular Systems KU Leuven Leuven Belgium Department of Chemistry KU Leuven Leuven Belgium Department of Chemistry Tsinghua University Beijing China School of Chemical Engineering University of Adelaide Adelaide South Australia Australia Department of Energy Engineering Korea Institute of Energy Technology (KENTECH) Naju South Korea

Industrial processes can lead to air and water pollution, particularly from organic contaminants such as toluene and antibiotics, posing threats to human health. Photo-assisted chemical oxidation technologies leverage light energy to mineralize these contaminants. In this Review, we discuss the mechanisms and efficiencies of photo-assisted advanced oxidation processes for wastewater treatment and photothermal technologies for air purification. The integration of solar energy enhances degradation efficiency and reduces energy consumption, enabling more efficient remediation methods. We evaluate the technological aspects of photo-assisted technologies, such as photo-Fenton, photo-persulfate activation, photo-ozonation and photoelectrochemical oxidation, emphasizing their potential for practical applications. Finally, we discuss the challenges in scaling up photo-assisted technologies for specific environmental remediation needs. Photo-assisted technologies have demonstrated effectiveness in environmental remediation, although large-scale applications remain constrained by high costs. Future potential applications of photo-assisted technologies will require that technology selection be tailored to specific pollution scenarios and engineering processes optimized to minimize costs.

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Identifying and suppressing Cr 3 Ni 2 σ-phase via transition layer design for reliable titanium–steel bimetal fabrication in laser directed energy deposition

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materials & Design 2025年 256卷

作者： Yuyan Wang Yayun Lu Yue Zhao Jiguo Shan Aiping Wu Yueliang Lu State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment Department of Mechanical Engineering Tsinghua University Beijing 100084 China Key Laboratory for Advanced Materials Processing Technology Ministry of Education Tsinghua University Beijing 100084 China Nanjing Engineering Institute of Aircraft Systems AVIC Nanjing 211106 China College of Engineering China Agricultural University Beijing 100091 China

Titanium–steel bimetal combines the low density of titanium and the excellent formability of steel, providing an ideal solution for applications requiring concurrent weight reduction and wear resistance. However, research on high-reliability titanium–steel bimetal fabrication via additive manufacturing remains limited. This study achieved crack-free titanium–steel bimetal via laser directed energy deposition using V/Cr/Ni transition layers. A functional bond was established between Ti6Al4V and M50 steel along the path Ti6Al4V/V/Cr/Ni/M50 steel. Crack-free fabrication requires transition layers with a total thickness of 2.5 mm, composed of at least two layers of V, one layer of Cr, and one layer of Ni. A Cr 3 Ni 2 σ-phase was identified in the Cr/Ni transition region, which appears to be the first observation in additive manufacturing and is not documented in existing phase diagrams. The high-hardness Cr 3 Ni 2 σ-phase (1043 HV) may cause stress concentration during mechanical loading. To suppress Cr 3 Ni 2 σ-phase formation, the Ni layer was replaced with Ni–30Cr. This modification eliminated brittle phase generation and induced grain refinement in transition layers, enhancing structural reliability.

关键词： AM additive manufacturing L-DED laser directed energy deposition CTE coefficients of thermal expansion SS stainless steel SEM scanning electron microscopy OM optical microscopy EDS energy dispersive spectroscopy XRD X-ray diffraction EBSD electron backscatter diffraction TEM transmission electron microscopy BCC body-centered cubic FCC face-centered cubic HCP hexagonal close-packed IQ image quality, HRTEM, High-Resolution TEM FFT Fast Fourier Transform IPF Z inverse pole figure map along the Z-axis Additive manufacturing Laser directed energy deposition Bimetal Titanium Steel

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Cryogenic minimum quantity lubrication machining: from mechanism to application

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Frontiers of Mechanical Engineering 2021年第4期16卷 649-697页

作者： Mingzheng LIU Changhe LI Yanbin ZHANG Qinglong AN Min YANG Teng GAO Cong MAO Bo LIU Huajun CAO Xuefeng XU Zafar SAID Sujan DEBNATH Muhammad JAMIL Hafz Muhammad ALI Shubham SHARMA School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China College of Automotive and Mechanical Engineering Changsha University of Science and TechnologyChangsha 410114China Sichuan Future Aerospace Industry LLC Shifang 618400China State Key Laboratory Mechanical Transmissions Chongqing UniversityChongqing 400044China Key Laboratory of Special Purpose Equipment and Advanced Processing Technology(Ministry of Education and Zhejiang Province) Zhejiang University of TechnologyHangzhou 310032China Department of Sustainable and Renewable Energy Engineering University of ShaijahShaijah 27272the United Arab Emirates Mechanical Engineering Department Curtin UniversityMiri 98009Malaysia College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Mechanical Engineering Department King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Department of Mechanical Engineering I.K.Gujral Punjab Technical UniversityJalandhar 144603India

Cutting fluid plays a cooling-lubrication role in the cutting of metal ***,the substantial usage of cutting fluid in traditional flood machining seriously pollutes the environment and threatens the health of *** machining technologies,such as dry cutting,minimum quantity lubrication(MQL),and cryogenic cooling technology,have been used as substitute for flood ***,the insufficient cooling capacity of MQL with normal-temperature compressed gas and the lack of lubricating performance of cryogenic cooling technology limit their industrial *** technical bottleneck of mechanical-thermal damage of difficult-to-cut materials in aerospace and other fields can be solved by combining cryogenic medium and *** latest progress of cryogenic minimum quantity lubrication(CMQL)technology is reviewed in this paper,and the key scientific issues in the research achievements of CMQL are ***,the application forms and process characteristics of CMQL devices in turning,milling,and grinding are systematically summarized from traditional settings to innovative ***,the cooling-lubrication mechanism of CMQL and its influence mechanism on material hardness,cutting force,tool wear,and workpiece surface quality in cutting are extensively *** effects of CMQL are systematically analyzed based on its mechanism and application *** show that the application effect of CMQL is better than that of cryogenic technology or MQL ***,the prospect,which provides basis and support for engineering application and development of CMQL technology,is introduced considering the limitations of CMQL.

关键词： cryogenic minimum quantity lubrication(CMQL) cryogenic medium processing mode device application mechanism application effect

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Controllable self-assembly and photothermal conversion of metallacatenanes induced by synergistic effect of free radicals and stacking interactions

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Chinese Chemical Letters 2025年

作者： Ying Zhao Yao He Jian-Xin Yang Wen-Jie Liu Dan Tian Francisco Aznarez Le-Le Gong Li-Long Dang Lu-Fang Ma Luoyang Key Laboratory of Green Synthesis and Photofunctional Materials Luoyang Normal University Luoyang 471934 China School of Chemistry and Chemical Engineering Henan Normal University Xinxiang 453007 China Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and Engineering Nanjing Forestry University Nanjing 210037 China State Key Laboratory of NBC Protection for Civilian Beijing 100191 China

The self-assembly and photothermal application studies of interlocked compounds has been attracting increasing attention during the last decades. Nevertheless, the synthesis of a series of interlocked topologies possessing similar structural characteristic and clarifying their photothermal performance law remains a challenge. Herein, we introduce a new dipyridinyl ligand L1 featuring two methoxy groups, which act as electron-donating species and provide electrons to the central benzene ring, resulting in an enhanced electron rich effect. Previous research indicates that this feature significantly contributes to forming π-stacking interactions. Furthermore, four half-sandwich rhodium-based building blocks exhibiting different metal-to-metal distances and conjugated effect were selected and used to combine with L1 for the synthesis of [2]catenanes and metallamacrocycles for studying the influence of half-sandwich building blocks on photothermal conversion performance under the same accumulation effect. Three new metalla[2]catenanes and one metallamacrocycle have been obtained in high yields and their structure has been unambiguously confirmed by single crystal X-ray diffraction analysis, NMR spectroscopy, and ESI-TOF-MS. In addition, dynamic structural transformation between [2]catenanes and the corresponding metallamacrocycles has been observed through concentration changes and polar solvent induced effect. Photothermal conversion abilities of the isolated complexes were studied and we observed that [2]catenane 3a displayed significant temperature changes (from 25.8 °C to 50.3 °C) under laser irradiation of 1.5 W/cm2, thereby reaching a photothermal conversion efficiency of 40.42%. Recorded EPR data indicates that the synergistic cooperation of the free radical effect at the building unit and the stacking effect of [2]catenanes most likely generated photothermal conversion.

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Substantial 〈 101 ] superlattice dislocations and nanotwins achieved without deformation in a casting Cr-rich TiAl-based alloy after a normalizing treatment

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materials Letters 2025年 398卷

作者： Shiqiu Liu Hongsheng Ding Ruirun Chen Jingjie Guo Hengzhi Fu Advanced Materials Additive Manufacturing Innovation Research Center School of Engineering Hangzhou City University Hangzhou 310015 China National Key Laboratory for Precision Hot Processing of Metals School of Materials Science and Engineering P. O. Box 434 Harbin Institute of Technology Harbin 150001 China

Herein, both substantial 〈 101 ] superlattice dislocations and nanotwins were achieved without deformation in a Cr-rich TiAl-based alloy prepared by continuous casting after a normalization at 1250 ℃ for 3 h, which remarkably enhanced the room-temperature (RT) compressive properties of the TiAl-based alloy. The heat-treated microstructural characteristics and the formation mechanism of these substructures were discussed emphatically. This research will provide helpful inspiration for further strengthening and plasticizing of TiAl intermetallic.

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Process optimization,microstructures and mechanical/thermal properties of Cu/Invar bi-metal matrix composites fabricated by spark plasma sintering

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Transactions of Nonferrous Metals Society of China 2021年第10期31卷 3050-3062页

作者： Qiang-qiang NIE Guo-hong CHEN Bing WANG Lei YANG Wen-ming TANG School of Materials Science and Engineering Hefei University of TechnologyHefei 230009China Electric Power Research Institute State GridAnhui Electric Power Co.Ltd.Hefei 230601China The 43 Research Institute of China Electronics Technology Group Corporation Hefei 230088China Anhui Province Key Laboratory of Microsystem Hefei 230088China Hefei Shengda Electronic Technology Industry Co. Ltd.Hefei 230088China Engineering Research Center of High-performance Copper Alloy Materials and Processing Ministry of EducationHefei 230009China

An orthogonal experiment scheme was designed to investigate the effects of the Cu content,compaction pressure,and sintering temperature on the microstructures and mechanical and thermal properties of(30−50)wt.%Cu/Invar bi-metal matrix composites fabricated via spark plasma sintering(SPS).The results indicated that as the Cu content increased from 30 to 50 wt.%,a continuous Cu network gradually appeared,and the density,thermal conductivity(TC)and coefficient of thermal expansion of the composites noticeably increased,but the tensile strength *** increase in the sintering temperature promoted the Cu/Invar interface diffusion,leading to a reduction in the TC but an enhancement in the tensile strength of the *** compaction pressure comprehensively affected the thermal properties of the *** 50wt.%Cu/Invar composite sintered at 700℃ and 60 MPa had the highest TC(90.7 W/(m·K)),which was significantly higher than the TCs obtained for most of the previously reported Cu/Invar composites.

关键词： spark plasma sintering(SPS) Cu/Invar bi-metal composite microstructure interface diffusion mechanical property thermal property

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