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SSRN 2023年

作者： Cheng, Zhikang Tu, Bingtian Wu, Ye Huang, Haijun School of Science Wuhan University of Technology Hubei Wuhan430070 China Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Hubei Xiangyang441000 China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Wuhan430070 China

Phosphorus-based materials with a high theoretical specific capacity and a fast charge-discharge rate are considered as promising anode materials for high energy density lithium-ion batteries (LIBs). Red phosphorus (RP) and black phosphorus (BP) are two main allotropes to be used as anode materials. However, huge volume expansion during charge-discharge processes hinders the application of RP and BP in LIBs. Composites of phosphorus and carbon-based materials have been extensively fabricated to withstand volume expansion of phosphorus and improve cycle performance. Here, composites of BP and graphite (BP-G) with three P-G mass ratios (8 : 2, 7 : 3, and 6 : 4) have been synthesized by a facile and scalab.e high-pressure and high-temperature (HPHT) method using RP and graphite composites (RP-G) prepared by ball milling as precursors. Their microstructure and bonding configurations have been analyzed by various characterization techniques. Among three RP-G composites, 7RP-3G exhibits the most excellent cycling stability, a high reversible capacity of 1331 mAh/g after 200 cycles at a current density of 0.78 A/g. However, RP-G composites show poor stability at high current densities. Among three BP-G composites, 6BP-4G shows the best cycle stability at high current densities, a reversible capacity of 634.6 mAh/g after 500 cycles at a current density of 2.6 A/g. Although, the reversible specific capacities of BP-G composites after long cycles are lower than those of RP-G, BP-G composites show more stable cycle performance than RP-G, especially at high current densities. The present work illustrates a direct and facile method to synthesize BP-G composites, and sheds light to explore new synthetic route of BP-based composites. © 2023, The Authors. All rights reserved.

关键词： Lithium-ion batteries

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Strengthening Soft 45# Steel Through a Crn/W-Dlc/Dlc Multilayer Coating

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SSRN 2024年

作者： Luo, Guoqiang Xu, Xinyu Dong, Haoran Wei, Qinqin Tian, Feng Qin, Jianglin Shen, Qiang Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Guangdong Chaozhou521000 China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Wuhan430070 China School of Materials Science and Engineering Wuhan University of Technology Hubei Wuhan430070 China Hubei Technology Innovation Center for Advanced Composites Wuhan University of Technology Hubei Wuhan430070 China State Owned Wuhan Xinyu Machine Factory Hubei Wuhan430060 China

Special equipment vehicles typically operate in complex environments, resulting in wear and failure of the chassis’s rotary seal shaft predominantly made of soft 45# steel. An effective strategy to extend the service life is to apply a hard coating on the working surface. However, previous research have primarily concentrated on the coating for hard high-speed steel, while the significant difference of physical characteristics between soft 45# steel and hard coating leads to a weak interface adhesion. This study produces a CrN/W-DLC/DLC multilayer coating on the soft 45# steel with strong interfacial adhesion and superior friction and wear property by tailoring the CrN transition layer thickness. The multilayer coating consists of five layers, a CrN transition layer, a Cr layer, a Cr/WC alternating layer, a W-DLC/DLC alternating layer, and the topmost DLC layer. Increasing the thickness of the transition layer improves the coating's hardness and adhesive strength. The 3CrN/W-DLC/DLC multilayer coating achieves the highest adhesive strength of 75N. The optimized CrN/W-DLC/DLC coating reduces the internal stress of the DLC coating and enhances its adhesion. Importantly, the average friction coefficient and wear cross-sectional area of the CrN/W-DLC/DLC multilayer coatings decrease accordingly. The 3CrN/W-DLC/DLC coating exhibits superior outstanding wear resistance evidenced by an average friction coefficient of 0.119 and a wear cross-sectional area of 100.55 μm2. A High proportion of sp2 bonds in the coating that are susceptible to graphitization and thicker transition layer that enhances the coating's support results in narrower wear traces. The oxidation wear and three-body abrasive wear as the main wear mechanisms. The work provides a significant promise for application in vehicle rotary seal components and a theoretical reference for improving the wear resistance of the seal surface. © 2024, The Authors. All rights reserved.

关键词： Hard coatings

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Berlin Green Framework‑Based Gas Sensor for Room‑Temperature and High‑Selectivity Detection of Ammonia

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Nano-Micro Letters 2021年第4期13卷 146-158页

作者： Tingqiang Yang Lingfeng Gao Wenxuan Wang Jianlong Kang Guanghui Zhao Delong Li Wen Chen Han Zhang Institute of Microscale Optoelectronics Collaborative Innovation Centre for Optoelectronic Science and TechnologyKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro‑Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy(SZ)Shenzhen UniversityShenzhen 518060People’s Republic of China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070People’s Republic of China Research Center for Materials Genome Engineering Wuhan University of TechnologyWuhan 430070People’s Republic of China

Ammonia detection possesses great potential in atmosphere environmental protection,agriculture,industry,and rapid medical ***,it still remains a great challenge to balance the sensitivity,selectivity,working temperature,and response/recovery *** this work,Berlin green(BG)framework is demonstrated as a highly promising sensing material for ammonia detection by both density functional theory simulation and experimental gas sensing *** in BG framework offers abundant active sites for ammonia absorption,and the absorbed ammonia transfers sufficient electron to BG,arousing remarkable enhancement of *** BG framework shows remarkable response to ammonia at 50–110°C with the highest response at 80°C,which is jointly influenced by ammonia’s absorption onto BG surface and insertion into BG *** sensing performance of BG can hardly be achieved at room temperature due to its high *** of conductive Ti3CN MXene overcomes the high resistance of pure BG framework,and the simply prepared BG/Ti3CN mixture shows high selectivity to ammonia at room temperature with satisfying response/recovery speed.

关键词： Berlin green framework Gas sensor Ammonia Room temperature High selectivity

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Microstructural Evolution of Defects Under Proton Irradiation in Porous Cu

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SSRN 2023年

作者： Li, Honglin Wang, Hao Wen, Pin Huang, Zhifeng Yin, Guanchao Chen, Fei Hubei Longzhong Laboratory Xiangyang441106 China 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 Key Laboratory of Theory and Application of Advanced Materials Mechanics School of Science Wuhan University of Technology Wuhan430070 China Wuhan University of Technology China

The high specific strength and exceptional thermal insulating properties of porous metals make them an ideal choice for aerospace structural components and thermal insulation materials. However, in the space environment, proton irradiation leads to the formation of voids, bubbles, and dislocation loops, significantly compromising their physical and mechanical properties. To date, there has been limited attention to the radiation resistance properties in research related to porous metals. This study conducted proton irradiation experiments with a total dose of 1×1017 ions/cm2 on porous Cu. This study discusses and explains the irradiation-induced damage characteristics on the surface of porous Cu before and after proton irradiation. This provides insights into the radiation damage mechanisms within the porous Cu ligaments and the hydrogen release behavior on the ligament surface. Cascade recoil and collision-induced thermal spike effects modify material defect characteristics and crystal structure. This study elucidates the defect evolution mechanism of porous materials under proton irradiation, offering new insights for the design of other radiation-resistant porous materials as protective materials for future advanced space probes. © 2023, The Authors. All rights reserved.

关键词： Radiation damage

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Binary solvent engineering and CFPy/perovskite interface modification strategy in spray-coating for fabricating large-area high-quality hole transport layer

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materials Today Chemistry 2025年 46卷

作者： Zhao, Xin Ruan, Danlin Zhu, Mingwei Song, Jiawei Cheng, Jiahao Shen, Wenjian Li, Wangnan Liang, Guijie Liang, Ying Peng, Yong Li, Bin Cheng, Yi-Bing Hubei Longzhong Laboratory Wuhan University of Technology (Xiangyang Demonstration Zone) Hubei Xiangyang 441000 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Machine X Technology Co. Ltd. Zhejiang 314211 China Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hubei University of Arts and Science Xiangyang 441053 China State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals Lanzhou University of Technology Lanzhou 730050 China

The high-quality and coverage of sprayed Spiro-OMeTAD layer on perovskite (PVSK) films is a significant challenge for the state-of-the-art perovskite solar cells (PSCs). In this work, the green mixed solvent system consisting of ethyl acetate (EA) and n-propyl acetate (NPA) was introduced to regulate the Spiro-OMeTAD solution properties. It was found that the rapid evaporation nature of EA/NPA mixed solvents significantly improves the coverage rate of sprayed Spiro-OMeTAD under ambient conditions. Besides, the introduction of 2-chloro-6-trifluoromethyl-3-aminopyridine (CFPy) further enhances the PVSK/Spiro-OMeTAD interface by improving the wettability of Spiro-OMeTAD solution on PVSK films, leading to a notable increase in Spiro-OMeTAD coverage by 39.5 %. With the increased coverage, the charge transport efficiency at PVSK/Spiro-OMeTAD interface was enhanced from 2.07 × 10⁻³ cm² V⁻¹ s⁻¹ to 7.32 × 10⁻³ cm² V⁻¹ s⁻¹. The CFPy was proved to reduce the migration rates of halide ions from the PVSK films to Spiro-OMeTAD layer, which can be attributed to the formation of hydrogen bonds between the –NH₂ group in CFPy and free iodide (I⁻) and bromide (Br⁻) ions. Ultimately, it was confirmed that high-quality Spiro-OMeTAD films can be sprayed onto PVSK film under ambient conditions with this interface modification strategy. The PSCs fabricated using the evaporation-spraying technique achieved a power conversion efficiency (PCE) of 19.67 %. Under 1 sun AM 1.5G illumination at 26 °C and 30 %–40 % relative humidity (RH), the devices maintained 80 % of their initial efficiency after 500 h of continuous light exposure. Furthermore, a 10 × 10 cm² sub-module (with an active area of 63 cm²) fabricated using this technique achieved a PCE of 15.54 %. © 2025 Elsevier Ltd

关键词： CFPy Hole transport layer Interface modification Perovskite solar cells Spray-coating

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Room Temperature synthesis of Vertically Aligned Amorphous Ultrathin NiCo-LDH Nanosheets Bifunctional Flexible Supercapacitor Electrodes

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Energy & Environmental materials 2024年第2期7卷 277-286页

作者： Kwadwo Asare Owusu Zhaoyang Wang Ali Saad Felix Ofori Boakye Muhammad Asim Mushtaq Muhammad Tahir Ghulam Yasin Dongqing Liu Zhengchun Peng Xingke Cai Institute for Advanced Study Shenzhen UniversityShenzhen 518060China College of Physics and Optoelectronics Shenzhen University3688 Nanhai BoulevardNanshan DistrictShenzhen 518060China School of Chemistry and Materials Science Hubei Engineering UniversityNo.272 Traffic AvenueXiaogan 432000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyNo.122 Luoshi RoadWuhan 430070China Key Laboratory of Green Printing CAS Research Centre for Excellence in Molecular ScienceInstitute of Chemistry Chinese Academy of Sciences(ICCAS)Beijing 100190China College of Mechatronics and Control Engineering Shenzhen University3688 Nanhai BoulevardNanshan DistrictShenzhen 518050China

Developing a simple scalab.e method to fabricate electrodes with high capacity and wide voltage range is desired for the real use of electrochemical ***,we synthesized amorphous NiCo-LDH nanosheets vertically aligned on activated carbon cloth substrate,which was in situ transformed from Co-metal-organic framework materials nano-columns by a simple ion exchange process at room *** to the amorphous and vertically aligned ultrathin structure of NiCo-LDH,the NiCo-LDH/activated carbon cloth composites present high areal capacities of 3770 and 1480 mF cm^(-2)as cathode and anode at 2 mA cm^(-2),and 79.5%and 80%capacity have been preserved at 50 mA cm^(-2).In the meantime,they all showed excellent cycling performance with negligible change after>10000 *** fabricating them into an asymmetric supercapacitor,the device achieves high energy densities(5.61 mWh cm^(-2)and 0.352 mW cm^(-3)).This work provides an innovative strategy for simplifying the design of supercapacitors as well as providing a new understanding of improving the rate capabilities/cycling stability of NiCo-LDH materials.

关键词： amorphous nanosheets aqueous supercapacitor high volumetric/areal energy density NiCo-LDH room temperature synthesis

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A Rate-Dependent Peridynamic Model for the Dynamic Behavior of Ceramic materials

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Computer Modeling in Engineering & Sciences 2020年第7期124卷 151-178页

作者： Bufan Chu Qiwen Liu Lisheng Liu Xin Lai Hai Mei Department of Engineering Structure and Mechanics Wuhan University of TechnologyWuhan430070China Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics Wuhan430070China State Key Laboratory of Materials Synthesis and Processing Wuhan430070China

In this study,a new bond-based peridynamic model is proposed to describe the dynamic properties of ceramics under impact *** materials show pseudo-plastic behavior under certain compressive loadings with high strain-rate,while the characteristic brittleness of the material dominates when it is subjected to tensile *** this model,brittle response under tension,softening plasticity under compression and strain-rate effect of ceramics are considered,which makes it possible to accurately capture the overall dynamic process of *** enables the investigation of the fracture mechanism for ceramic materials,during ballistic impact,in more ***,a bond-force updating algorithm is introduced to perform the numerical simulation and solve the derived *** proposed model is then used to analyze the dynamic response of ceramics tiles under impact loading to assess its *** results of damage development in ceramic materials are calculated and compared with the experimental *** simulation results are consistent with the experiments,which indicates that the proposed rate-dependent peridynamic model has the capability to describe damage propagation in ceramics with good ***,based on a comparison between simulation and experimental results,it can be concluded that the damage results are in better agreement with experimental results than non-ordinary state-based peridynamic method.

关键词： Penetration ceramic peridynamics rate-dependency crack

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Polyoxometalated metal-organic framework superstructure for stable water oxidation

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Science (New York, N.Y.) 2025年第6745期388卷 430-436页

作者： Yue, Kaihang Lu, Ruihu Gao, Mingbin Song, Fei Dai, Yao Xia, Chenfeng Mei, Bingbao Dong, Hongliang Qi, Ruijuan Zhang, Daliang Zhang, Jiangwei Wang, Ziyun Huang, Fuqiang Xia, Bao Yu Yan, Ya State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai China School of Chemistry and Chemical Engineering State Key Laboratory of Materials Processing and Die & Mould Technology Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education) Hubei Key Laboratory of Material Chemistry and Service Failure Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology (HUST) Wuhan China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing China School of Chemical Sciences University of Auckland Auckland New Zealand National Engineering Laboratory for Methanol to Olefins Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian China Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai Synchrotron Radiation Facility Shanghai China Center for High Pressure Science and Technology Advanced Research Shanghai China Key Laboratory of Polar Materials and Devices (MOE) Department of Electronics East China Normal University Shanghai China Multiscale Porous Materials Center Institute of Advanced Interdisciplinary Studies and School of Chemistry and Chemical Engineering Chongqing University Chongqing China College of Energy Material and Chemistry Inner Mongolia Key Laboratory of Low Carbon Catalysis Inner Mongolia University Hohhot China State Key Lab of Metal Matrix Composites School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai China Center for Next-Generation Energy Materials and School of Chemical Engineering Sungkyunkwan University (SKKU) Seobu-ro Jangan-guGyeonggi-do Suwon South Korea

Stable, nonprecious catalysts are vital for large-scale alkaline water electrolysis. Here, we report a grafted superstructure, MOF@POM, formed by self-assembling a metal-organic framework (MOF) with polyoxometalate (POM). In situ electrochemical transformation converts MOF into active metal (oxy)hydroxides to produce a catalyst with a low overpotential of 178 millivolts at 10 milliamperes per square centimeter in alkaline electrolyte. An anion exchange membrane water electrolyzer incorporating this catalyst achieves 3 amperes per square centimeter at 1.78 volts at 80°C and stable operation at 2 amperes per square centimeter for 5140 hours at room temperature. In situ electrochemical spectroscopy and theoretical studies reveal that the synergistic interactions between metal atoms create a fast electron-transfer channel from catalytic iron and cobalt sites, nickel, and tungsten in the polyoxometalate to the electrode, stabilizing the metal sites and preventing dissolution.

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Ag-Pd Bimetallic Hollow Nanostructures with Tunable Compositions and Structures for the Reduction of 4-Nitrophenol

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SSRN 2022年

作者： Ma, Wenjuan Zhang, Guimin Fu, Zhengyi School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology Wuhan430070 China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Bimetallic hollow nanostructures are of interest for high-performance nanocatalysis and utilization efficiency of noble metals. The paper reported a synthesis of Ag-Pd bimetallic hollow nano-hexagon with outer sizes of about 27 nm and wall thicknesses of 3 to 5 nm by galvanic replacement reaction coupling with co-reduction method using Ag nanospheres as sacrificial templates. Cetyltrimethylammonium bromide (CTAB) had double effect on controlling morphologies. It served as the capping agent to mediate the rate of dissolution and deposition on different planes by selectively absorption, meanwhile it provided Br - ion to involve in the reaction and promote the thermodynamics of the galvanic replacement. The compositions and structures of Ag-Pd bimetals could be finely tuned by changing the amount of palladium chloride acid (H 2 PdCl 4 ) while maintaining the volume of Ag seed templates. By comparison of the rate constant k m of 4-nitrophenol reduction reaction over different samples as catalyst, hollow bimetallic nano-hexagon with composition of AgPd 0.76 exhibited the highest catalytic activity because of high surface areas and synergy effect between two metal. © 2022, The Authors. All rights reserved.

关键词： Chlorine compounds

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Na doping and CeO2 surface modification enhancing the Li-rich Li1.2Mn0.54Ni0.13Co0.13O2 cathode material for lithium-ion battery

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SSRN 2024年

作者： Li, Yu Feng, Xiang-Yu Ran, Mao-Jin Yuan, Man-Man Wei, Mei-Tong Wu, Liang Hu, Zhi-Yi 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 School of Automotive Engineering Xiangyang Polytechnic 18 Longzhong Road Hubei Xiangyang441050 China University of Namur NamurB-5000 Belgium

Li-rich Mn-based layered oxides with high specific capacity and operating voltages become one of the most promising materials for lithium-ion batteries (LIBs). However, it still faces several issues on low initial coulombic efficiency, poor electronic conductivity and voltage fading due to oxygen release and transition metals rearrangement during cycling. In this study, Li1.2Mn0.54Ni0.13Co0.13O2 (LMR) cathode material with Na ion doping (LMNaR) and CeO2 surface modification (LMNaR@CeO2) is prepared to realize the synergistic modification effect. The doping of Na ions enlarges Li layer spacing to effectively promote the insertion and extraction of lithium ions, which makes the layered structure more stable to reduce the effect of phase transition. And the CeO2 surface modification restrains the side reactions between electrode and electrolyte, and stabilizes lattice oxygen and eases oxygen release. As a result, the LMNaR@CeO2 displays a specific capacity of 196 mAh·g-1 after 100 cycles at 0.5 C with a capacity retention of 94% and a merely voltage decay of 0.16 V, which are much better than the LMR with a specific capacity of 159.6 mAh·g-1 and only a 79% capacity retention. Our strategy here provides a feasible approach for the development of Li-rich Mn-based anode materials for long life LIBs. © 2024, The Authors. All rights reserved.

关键词： Lithium-ion batteries

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