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Failure Behavior and Mechanism of Vat Photopolymerization Additively Manufactured Al_(2)O_(3) Ceramic Lattice Structures

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Additive Manufacturing Frontiers 2024年第4期3卷 166-177页

作者： Keqiang Zhang Xueqin Zhang Qiaoyu Meng Bin Zhang Zhaoliang Qu Rujie He State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing100081China School of Naval Architecture Ocean and Energy Power EngineeringWuhan University of TechnologyWuhan430070China

Vat photopolymerization additive manufacturing produces lightweight load-bearing ceramic lattice structures that have flexibility,time-efficiency,and high precision,compared to conventional ***,understanding the compression behavior and failure mechanism of such structures under loading remains a *** this study,considering the correlation between the strut angle and bearing capacity,body-centered tetragonal(BCT)lattice structures with varying angles are designed based on a body-centered cubic(BCC)*** Al_(2)O_(3) ceramic lattice structures with varying angles are fabricated by vat *** mechanical properties,deformation process,and failure mechanism of the Al_(2)O_(3) ceramic lattice structures are characterized through a combination of ex-and in-situ X-ray computed tomography(X-CT)compression testing and analyzed using a finite element method(FEM)at macro-and *** results demonstrate that as the angle increases,the stress concentration gradually expands from the node to the strut,resulting in an increased loadbearing ***,the failure mode of the Al_(2)O_(3) ceramic lattice structures is identified as diagonal slip shear *** findings provide a greater understanding of ceramic lattice structure failures and design optimization approaches.

关键词： Ceramic lattice structure Vat photopolymerization additive manufacturing Ex-and in-situ X-ray computed tomography(X-CT) Compression behavior Failure mechanism

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Confined cobalt single-atom catalysts with strong electronic metal-support interactions based on a biomimetic self-assembly strategy

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Carbon Energy 2024年第9期6卷 156-171页

作者： Bowen Guo Zekun Wang Lei Zheng Guang Mo Hongjun Zhou Dan Luo State Key Laboratory of Heavy Oil Processing Beijing Key Laboratory of Biogas Upgrading UtilizationCollege of New Energy and MaterialsChina University of Petroleum(Beijing)BeijingChina Beijing Key Laboratory of Micro-Nano Energy and Sensor CAS Center for Excellence in NanoscienceBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijingChina School of Chemical Engineering Shandong Institute of Petroleum and Chemical TechnologyDongyingShandongChina School of Chemistry Beijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijingChina Institute of High Energy Physics Chinese Academy of SciencesBeijingChina

Designing high-performance and low-cost electrocatalysts for oxygen evolu-tion reaction(OER)is critical for the conversion and storage of sustainable energy *** by the biomineralization process,we utilized the phosphorylation sites of collagen molecules to combine with cobalt-based mononuclear precursors at the molecular level and built a three-dimensional(3D)porous hierarchical material through a bottom-up biomimetic self-assembly strategy to obtain single-atom catalysts confined on carbonized biomimetic self-assembled carriers(Co SACs/cBSC)after subsequent high-temperature *** this strategy,the biomolecule improved the anchoring efficiency of the metal precursor through precise functional groups;meanwhile,the binding-then-assembling strategy also effectively suppressed the nonspecific adsorption of metal ions,ultimately preventing atomic agglomeration and achieving strong electronic metal-support interactions(EMSIs).Experimental characterizations confirm that binding forms between cobalt metal and carbonized self-assembled substrate(Co–O_(4)–P).Theoretical calculations disclose that the local environment changes significantly tailored the Co d-band center,and optimized the binding energy of oxygenated intermediates and the energy barrier of oxygen *** a result,the obtained Co SACs/cBSC catalyst can achieve remarkable OER activity and 24 h durability in 1 M KOH(η_(10) at 288 mV;Tafel slope of 44 mV dec^(-1)),better than other transition metal-based catalysts and commercial IrO_(2).Overall,we presented a self-assembly strategy to prepare transition metal SACs with strong EMSIs,providing a new avenue for the preparation of efficient catalysts with fine atomic structures.

关键词： biomimetic self-assembly support electronic metal-support interactions oxygen evolution reaction single atoms catalysts

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Enhancing energy density of poly(vinylidene fluoride) composite film via addition of N-doped carbon modified boron nitride and sandwich-structural engineering

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Applied Surface Science 2023年第1期640卷

作者： Huang, Huabo Mei, Wentao Wang, Yucong Huang, Juan Li, Liang Ji, Jiayou Xiong, Chuanxi Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Key Laboratory for Green Chemical Process of Ministry of Education School of Materials Science and Engineering Wuhan Institute of Technology Wuhan430205 China Key Laboratory of Green Processing and Functional New Textile Materials of Ministry of Education School of Textile Science and Engineering Wuhan Textile University Wuhan430200 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China

It is a challenge to simultaneously enhance dielectric constant and breakdown strength of dielectrics and achieve a greatly elevated energy density. Herein, polyaniline was first coated onto the surface of boron nitride nanosheets (BN), and then nitrogen-doped carbon (NC) was formed through a carburization process, resulting in BN@NC composite, which was subsequently added to poly(vinylidene fluoride) (PVDF) to prepare a composite film with high dielectric performance. The characterization showed that BN@NC effectively preserved the nanosheet structure of BN and formed strong hydrogen bonding interactions with the PVDF matrix, promoting the β-PVDF formation. This not only improved the compatibility but also enhanced the interfacial polarization between conductive NC and the polymer, leading to a high dielectric constant. Moreover, the electrically insulating BN prevented the formation of leakage current, resulting in a high breakdown strength. Finally, a sandwich-structured film was constructed, and exhibited a dielectric constant of 10.2 (at 1 kHz), a breakdown strength of 380 MV m−1, and an energy density of 6.1 J cm−3, which were 20%, 36%, and 74% higher, respectively, than those of pure PVDF film (8.5, 280 MV m−1, and 3.5 J cm−3). This work highlights significant potential for applications in low-cost and high-energy density dielectric composites. © 2023 Elsevier B.V.

关键词： Boron nitride

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Hierarchical Structured Fabrics with Enhanced Pressure Sensing Performance Based on Orientated Growth of Functional Bacterial Cellulose

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advanced Fiber materials 2024年第5期6卷 1554-1568页

作者： Chong Gao Yingcun Liu Zongxue Gu Juan Li Yue Sun Wei Li Keshuai Liu Duo Xu Bin Yu Weilin Xu College of Textile Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200People’s Republic of China College of Textile and Clothing Engineering Soochow UniversitySuzhou 215123People’s Republic of China

Wearable electronics based on natural biomaterials,such as bacterial cellulose(BC),have shown promise for a variety of healthcare and human-computer interaction ***,current BC-based pressure sensors have an inherent limi-tation,which is the two-dimensional rigid structures and limited compressibility of BC restrict the sensitivity and working range for pressure ***,we propose a strategy for fabricating BC/polypyrrole/spacer fabric(BPSF)pressure sensors with a hierarchical structure constructed by integrating conductive BC nanonetwork into a compressible fabric frame via the in situ biofermentation *** hierarchical structure design includes a cross-scale network from the nanoscale BC sensor networks to the macroscopic three-dimensional compressible fabric sensor network,which significantly improves the working range(0-300 kPa)and sensitivity(40.62 kPa-1)of *** this unique structural design,the sensor also achieves a high fatigue life(~5000 cycles),wearability,and reproducibility even after several washing and abrasion ***,a flexible and wearable electronic textile featuring an n×n sensing matrix was developed by constructing BPSF arrays,allowing for the precise control of machines and weight distribution *** empirical insights are valuable for the biofabrication and textile structure design of wearable devices toward the realization of highly intuitive human-machine interfaces.

关键词： Bacterial cellulose textile In situ biofermentation Hierarchical structure Pressure sensing

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Boosting Ion Conduction and Moisture Stability Through Zn2+ Substitution of Chloride Electrolytes for All-Solid-state Lithium Batteries

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advanced Energy materials 2025年第0期

作者： Lei, Peng Wu, Gang Liu, Hong Qi, Xiang Wu, Meng Li, Dabing Li, Yang Gao, Lei Nan, Ce-Wen Fan, Li-Zhen Beijing Key Laboratory for Advanced Energy Materials and Technologies Institute of Advanced Materials and Technology University of Science and Technology Beijing Beijing100083 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China

The recently emerged chloride solid electrolytes have garnered significant attention due to their superior ionic conductivity, wide electrochemical stability window, and exceptional compatibility with high-voltage oxide cathodes. Nevertheless, the currently cost-effective Zr-based chloride solid electrolytes face significant challenges, including low ionic conductivity and poor moisture stability. Herein, a versatile Zn2+-doped Zr-based chloride electrolyte is presented, designed to meet the aforementioned requirements. The optimized Li2.4Zr0.8Zn0.2Cl6 exhibits an improved ionic conductivity of 1.13 mS cm−1 at 30 °C. Simultaneously, the Li2.4Zr0.8Zn0.2Cl6 also demonstrates impressive moisture stability, maintaining its structural integrity after exposure to humid air. The mechanism underlying the enhanced moisture stability of Li2.4Zr0.8Zn0.2Cl6 is further elucidated by density functional theory calculations. Most notably, whether coupled with LiCoO2 or LiNi0.8Mn0.1Co0.1O2 cathodes, Li2.4Zr0.8Zn0.2Cl6-based all-solid-state batteries demonstrate exceptional cycling stability and rate performance. This high ionic conduction and moisture-resistant chloride electrolyte holds great promise for significantly advancing the commercialization of all-solid-state lithium batteries. © 2025 Wiley-VCH GmbH.

关键词： Solid-state Batteries

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Fabrication and Characterization of Pressure Sensors Based on Xanthan Gum and Pullulan

Fabrication and Characterization of Pressure Sensors Based o...

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作者： Ya-Qi Zhang Shi-Yao Liu Yong-Zhen Tao State Key Laboratory for Textile Materials and Advanced Processing Technology Wuhan Textile University College of Material Science and Engineering Wuhan Textile University

Conductive hydrogels based on biopolymers have potential applications in the field of wearable devices,implantable devices, and human-machine interfaces due to their biocompatibility as well as ***, hydrogels are prone to water loss under dry atmospheres. In this paper, a biopolymer-based pressure sensor with water retention was designed. Xanthan gum(XG) and pullulan(P) were cross-linked with sodium trimetaphosphate(STMP) to prepare XG5-P-STMP, and polyethylene glycol with a molecular weight of 200(PEG200) was added into hydrogels to improve moisture retention. The mechanical properties of the hydrogels were investigated by rheologic measurements such as time sweep, frequency sweep, and strain sweep. The results showed that the addition of PEG200 enhanced strength and moisture retention of the hydrogels, and high PEG200 content hindered the recovery property of the hydrogels. Furthermore, the XG5-P-PEG-STMP hydrogel with ionic conductivity and recoverability was explored as a pressure sensor, and the resistance change ratio exhibited repeatable profile. This work provides some valuable information for further applications of natural polysaccharides as intelligent flexible elections.

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Transverse Impact Performance and Finite Element Analysis of Three Dimensional Woven Tubular Composite with Different Structures

SSRN

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SSRN 2024年

作者： Gong, Xiaozhou Song, Yao Chai, Ying Wang, Jiaxuan Liu, Yang Ouyang, Yiwei School of Textile Science and Engineering Wuhan Textile University Wuhan430200 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China

In this study, experiments combined with finite element analysis (FEA) were used to investigate the damage mechanism of transverse low-velocity impacts on three-dimensional woven tubular composites (3DWTC) with different structures. The damage morphology after impact was observed using three-dimensional microscopy and scanning electron microscopy (SEM). Three meso-scale models were constructed based on the authentic structure of the 3DWTC. Additionally, the effects of the structure type on the impact resistance, stress distribution, and damage morphology of 3DWTC were studied. The findings of the study indicate that the shallow cross-linked (SCL) structure exhibits the greatest impact resistance. The through orthogonal (TO) structure exhibits the lowest impact resistance. The greater the straightness of the warp yarns in the structure, the density of the weft, the volume fraction, the greater the cooperative load-bearing capacity of the warp and weft yarns, and the greater the speed of stress propagation. The weft and inner warp yarns are subjected to tensile forces at the point of impact. The outer warp is subjected to compression. The stresses are distributed in a cross-shaped pattern. The straightened warp and weft parts of the TO play an important structural role in load-bearing. The warp yarns of the SCL and the shallow-crossed curved joint (SCCJ) structure play a significant role in the load-bearing capacity of the structure. © 2024, The Authors. All rights reserved.

关键词： Finite element method

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Interfacial coordination bonds accelerate charge separation for unprecedented hydrogen evolution over S-scheme heterojunction

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Chinese Journal of Catalysis 2024年第10期65卷 174-184页

作者： Chunxue Li Hao Lu Guixiang Ding Tianyi Ma Shiyong Liu Li Zhang Guangfu Liao College of Ecological Environment and Urban Construction Fujian University of TechnologyFuzhou 350118FujianChina School of Materials Science and Engineering Suzhou University of Science and TechnologySuzhou 215009JiangsuChina College of Materials Engineering Fujian Agriculture and Forestry UniversityFuzhou 350002FujianChina School of Science RMIT UniversityMelbourneVIC 3000Australia Jiangxi Province Key Laboratory of Functional Crystalline Materials Chemistry Jiangxi University of Science and TechnologyGanzhou 341000JiangxiChina State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200HubeiChina

Inspired by natural photosynthesis,fabricating high-performance S-scheme heterojunction is regarded as a successful tactic to address energy and environmental ***,NH_(2)-MIL-125(Ti)/Zn_(0.5)Cd_(0.5)S/NiS(NMT/ZCS/NiS)S-scheme heterojunction with interfacial coordination bonds is successfully synthesized through in-situ solvothermal ***,the optimal NMT/ZCS/NiS S-scheme heterojunction exhibits comparable photocatalytic H_(2)evolution(PHE)rate of about 14876.7μmol h^(−1)g^(−1)with apparent quantum yield of 24.2%at 420 nm,which is significantly higher than that of recently reported MOFs-based *** interfacial coordination bonds(Zn–N,Cd–N,and Ni–N bonds)accelerate the separation and transfer of photogenerated charges,and the NiS as cocatalyst can provide more catalytically active sites,which synergistically improve the photocatalytic ***,theoretical calculation results display that the construction of NMT/ZCS/NiS S-scheme heterojunction also optimize the binding energy of active site-adsorbed hydrogen atoms to enable fast adsorption and *** Kelvin probe force microscopy,in-situ irradiation X-ray photoelectron spectroscopy,femtosecond transient absorption spectroscopy,and theoretical calculations provide sufficient evidence of the S-scheme charge migration *** work offers unique viewpoints for simultaneously accelerating the charge dynamics and optimizing the binding strength between the active sites and hydrogen adsorbates over S-scheme heterojunction.

关键词： Interfacial coordination bond S-schemeheterojunction Photocatalytic H_(2)evolution Charge dynamics Free energy barrier

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Revolutionizing Wearable:Multicolored Photochromic Fiber Opens new Frontiers in Human–Machine Interaction

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advanced Fiber materials 2024年第3期6卷 619-621页

作者： Jing Zhang Zhigang Xia Perry Ping Shum School of Mechanical Engineering and Electronic Information China University of Geosciences(Wuhan)Wuhan 430074China State Key Laboratory of New Textile Materials and Advanced Processing Technologies School of Textile Science and EngineeringTextile Industry Key Laboratory of Yarn and Its FunctionalizationWuhan Textile UniversityWuhan 430200China Department of Electronic and Electrical Engineering Southern University of Science and TechnologyShenzhen 518055China

Substantial challenges remain in developing fiber devices to achieve uniform and customizable photochromic lighting effects using lightweight hardware.A recent publication in Light Science&Application,spearheaded by ***-Qing Lu and *** Tao presents a methodical approach to surmount the limitations in photochromic *** integrated controllable photochromic fibers into various wearable devices,providing a promising path for future exploration and advancement in the field of human–machine interaction.

关键词： Multicolored photochromic fiber Wearable device Fiber thermal drawing process Human–machine interaction

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A Novel NASICON‑Type Na_(3.5)MnCr_(0.5)Ti_(0.5)(PO_(4))_(3)Nanofiber with Multi‑electron Reaction for High‑Performance Sodium‑Ion Batteries

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advanced Fiber materials 2024年第2期6卷 561-569页

作者： Ting Zhu Wei Liu Xiaobin Liao Mengyao Wang Hao Fan Zihe Wei Congcong Cai Liyan Yang Mufang Li Dong Wang Ping Hu Xuanpeng Wang Key Laboratory of Textile Fiber and Products Ministry of EducationHubei International Scientific and Technological Cooperation Base of Intelligent TextileMaterials&ApplicationWuhan Textile UniversityWuhan 430200China Hubei Key Laboratory of Micro‑Nanoelectronic Materials and Devices School of MicroelectronicsHubei UniversityWuhan 430062China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Physical Science&Technology School of ScienceWuhan University of TechnologyWuhan 430070China Hubei Longzhong Laboratory Wuhan University of Technology(Xiangyang Demonstration Zone)Xiangyang 441000China

Sodium superionic conductors(NASICONs)show significant promise for application in the development of cathodes for sodium-ion batteries(SIBs).However,it remains a major challenge to develop the desired multi-electron reaction cathode with a high specific capacity and energy ***,we report a novel NASICON-type Na_(3.5)MnCr_(0.5)Ti_(0.5)(PO_(4))_(3)cathode obtained by combining electrospinning and stepwise sintering *** cathode exhibits a high discharge capacity of 160.4 mAh g^(−1)and operates at a considerable medium voltage of 3.2 *** Na_(3.5)MnCr_(0.5)Ti_(0.5)(PO_(4))_(3)cathode undergoes a multi-electron redox reaction involving the Cr^(3+/4+)(4.40/4.31 V ***/Na^(+)),Mn^(3+/4+)(4.18/4.03 V),Mn^(2+/3+)(3.74/3.41 V),and Ti^(3+/4+)(2.04/2.14 V)redox *** redox reaction enables a three-electron transfer during the Na+intercalation/de-intercalation *** a result,the Na_(3.5)MnCr_(0.5)Ti_(0.5)(PO_(4))_(3)demonstrates a significant enhancement in energy density,surpassing other recently reported SIB *** highly reversible structure evolution and small volume changes during cycling were demonstrated with in-situ X-ray diffraction,ensuring outstanding cyclability with 77%capacity retention after 500 ***,a NMCTP@C//Sb@C full battery was fabricated,which delivered a high energy density of 421 Wh kg−1 and exhibited good cyclability with 75.7%capacity retention after 100 *** rational design of composition regulation with multi-metal ion substitution holds the potential to unlock new possibilities in achieving high-performance SIBs.

关键词： Sodium-ion battery NASICON structure Na_(3.5)MnCr_(0.5)Ti_(0.5)(PO_(4))_(3)nanofiber Ex/in-situ characterization Multi-electron reaction

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