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Micro/nano-wrinkled elastomeric electrodes enabling high energy storage performance and various form factors

Carbon Energy 2023年第12期5卷 137-152页

作者： Changeun Yoo Seokmin Lee Yongkwon Song Woojae Chang Moon Kyu Park Younji Ko Jinhan Cho Department of Chemical and Biological Engineering Korea UniversitySeoulSeongbuk-guRepublic of Korea KU-KIST Graduate School of Converging Science and Technology Korea UniversitySeoulSeongbuk-guRepublic of Korea Soft Hybrid Materials Research Center Advanced Materials Research DivisionKorea Institute of Science and Technology(KIST)Seongbuk-guSeoulRepublic of Korea

Stretchable elastomer-based electrodes are considered promising energy storage electrodes for next-generation wearable/flexible electronics requiring various shape ***,these elastomeric electrodes suffer from the limited electrical conductivity of current collectors,low charge storage capacities,poor interfacial interactions between elastomers and conductive/active materials,and lack of shape *** this study,we report hierarchically micro/nano-wrinkle-structured elastomeric electrodes with notably high energy storage performance and good mechanical/electrochemical stabilities,simultaneously allowing various form *** this study,a swelling/deswelling-involved metal nanoparticle(NP)assembly is first performed on thiol-functionalized polydimethylsiloxane(PDMS)elastomers,generating a micro-wrinkled structure and a conductive seed layer for subsequent *** the assembly of metal NPs,the conformal electrodeposition of Ni and NiCo layered double hydroxides layers with a homogeneous nanostructure on the micro-wrinkled PDMS induces the formation of a micro/nano-wrinkled surface morphology with a large active surface area and high electrical *** on this unique approach,the formed elastomeric electrodes show higher areal capacity and superior rate capability than conventional elastomeric electrodes while maintaining their electrical/electrochemical properties under external mechanical *** notable mechanical/electrochemical performance can be further enhanced by using spiral-structured PDMS(stretchability of~500%)and porous-structured PDMS(areal capacity of~280μAh cm^(-2)).

关键词： elastomeric electrodes electrodeposition micro/nano-wrinkled structures

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Metal-organic frameworks:Synthetic methods for industrial production

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Nano research 2023年第5期16卷 7906-7925页

作者： Dou Ma Xin Huang Yu Zhang Lu Wang Bo Wang Frontiers Science Center for High Energy Material Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion MaterialsKey Laboratory of Cluster ScienceSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China Advanced Technology Research Institute(Jinan) Beijing Institute of TechnologyJi’nan 250000China Beijing Institute of Technology Library Beijing Institute of TechnologyBeijing 100081China

Metal-organic frameworks(MOFs),which are constructed by metal ions or clusters with organic ligands,have shown great potential in gas storage and separation,luminescence,catalysis,drug delivery,sensing,so *** than 20,000 MOFs have been reported by adjusting the composition and reaction conditions,most of them were synthesized by hydrothermal or solvothermal *** conventional solvothermal methods are favorable for the slow crystallization of MOFs to obtain single crystals or highly crystalline powders,which are suitable for the structure ***,their harsh synthesis conditions,long reaction time,difficulty in continuous synthesis limit their scale-up in industrial production and ***,shaping or processing is also required to bring MOF crystals and powders into the ***,this review demonstrates the crystallization mechanisms of MOFs to understand how the synthetic parameters affect the final ***,a variety of promising synthetic routes which can be used for large scale synthesis were reviewed in ***,the prospects of MOF shaping and processing are provided to promote their industrial application.

关键词： metal-organic frameworks synthetic methods crystallization mechanisms scale-up

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Boosting Supercapacitor Energy Storage Using Microporous Carbon Derived from an Octavinylsilsesquioxane and Fluorenone-Linked Porous Hybrid Polymer

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ACS applied Energy Materials 2024年第17期7卷 7505-7516页

作者： Basit, Abdul Mohamed, Mohamed Gamal Ejaz, Mohsin Xuan Su, Bo Manzoor, Hina Kuo, Shiao-Wei Department of Materials and Optoelectronic Science College of Semiconductor and Advanced Technology Research Center for Functional Polymers and Supramolecular Materials National Sun Yat-Sen University Kaohsiung804 Taiwan Department of Chemistry Faculty of Science Assiut University Assiut71516 Egypt Department of Medicinal and Applied Chemistry Kaohsiung Medical University Kaohsiung807 Taiwan

Supercapacitors (SCs), with their exceptional properties, offer a promising solution to the ongoing energy crisis, addressing the growing demand for high-energy storage devices. Polymeric organic porous materials (POIPs) exhibit various sizes, precisely controlled porosities, lightweight nature, extensive surface areas, impressive intrinsic porosity, attractive surface chemistry, outstanding stability, and customizable structures and functionalities. These features collectively render POIPs as a cost-effective material for applications in energy storage. This study successfully synthesized an octavinylsilsesquioxane (OVS)-FO-POIP through a Heck coupling reaction between OVS and 2,7-dibromo-9H-fluoren-9-one (DBFO). Confirmation of the OVS-FO-POIP’s chemical structure was achieved using solid-state 13C and 29Si NMR and Fourier transform infrared analyses. Subsequently, carbonization and KOH activation at 900 °C yielded a porous carbon material, denoted as OVS-FO-POIP-900. Microporous characteristics were evidenced by specific surface area (SBET) values of 264 m2 g-1 for the OVS-FO-POIP and 387 m2 g-1 for OVS-FO-POIP-900 and their corresponding pore diameters of 1.90 and 1.59 nm, respectively. Notably, OVS-FO-POIP-900 demonstrated an improved particular specific capacitance of 776 F g-1 compared to that of the OVS-FO-POIP (271 F g-1) at a current density of 1 A g-1, in addition to an exceptional capacitance retention of up to 79% after 6000 cycles. The heightened surface area enhances the probability of electrochemical reactions, thereby elevating capacitance levels. To delve deeper into electrochemical performance, symmetric devices were constructed for both the OVS-FO-POIP and the OVS-FO-POIP-900, exhibiting specific capacitances of 167 and 268 F g-1, respectively. Remarkably, OVS-FO-POIP-900 demonstrated outstanding performance in these electrochemical assessments, suggesting its potential suitability for SC applications. © 2024 The Authors. Published by American Ch

关键词： Potassium hydroxide

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NiMo-MMO catalyst derived from LDHs precursors toward the deep hydrogenation of pyrene

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Chinese Journal of Chemical Engineering 2024年第12期76卷 201-210页

作者： Yongliang Jia Boyang Bai Jing Wang Yueyi Wang Zheng Wang Xiaoxun Ma School of Chemical Engineering Northwest UniversityXi'an 710069China International Scientific and Technological Cooperation Base of the Ministry of Science and Technology(MOST)for Clean Utilization of Hydrocarbon Resources Xi'an 710069China Chemical Engineering Research Center of the Ministry of Education(MOE)for Advanced Use Technology of Shanbei Energy Xi'an 710069China Shaanxi Research Center of Engineering Technology for Clean Coal Conversion Xi'an 710069China Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi Xi'an 710069China College of Chemistry and Materials Science Weinan Normal UniversityWeinan 714000China

A series of Ni-based catalysts were prepared via structural topological transformation from the Ni@Al_(2)O_(3)layered double hydroxides(LDHs)precursors,and applied for the deep catalytic hydrogenation saturation of pyrene in a high-pressure *** pore structures,active species dispersion,surface morphology,amount and type of acid of the prepared catalysts were characterized by BET,XRD,SEM,TEM,XPS,SEM,NH_(3)-TPD and *** studied the influence of physicochemical properties of Ni-based catalysts on the regularity and mechanism of deep hydrogenation of ***,the synergy between Ni and Mo,and the interaction between active metals and support were discussed to further reveal the constitutive relationship during the hydrogenation reaction of *** results of the evaluation of the catalytic hydrogenation of pyrene show that the as-prepared NiMo mixed metal oxide(MMO)catalyst showed excellent catalytic activity:~95%pyrene conversion,90.12%for the selectivity of deep hydrogenation products(hexahydropyrene,decahydropyrene and hexadecahydropyrene).It was expected that the successfully preparation and utilization of NiMo-MMO catalyst could provide a theoretical basis for the design of this kind of catalysts for deep catalytic hydrogenation of polycyclic aromatic hydrocarbons(PAHs).

关键词： Ni@Al_(2)O_(3)LDHs Structural topological transformation method NiMo-MMO catalyst Pyrene deep hydrogenation

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Electron-irradiation-facilitated production of chemically homogenized nanotwins in nanolaminated carbides

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Journal of advanced Ceramics 2023年第6期12卷 1288-1297页

作者： Hui Zhang Qianqian Jin Tao Hu Xiaochun Liu Zezhong Zhang Chunfeng Hu Yanchun Zhou Yu Han Xiaohui Wang Electron Microscopy Center South China University of TechnologyGuangzhou 510640China School of Emergent Sof Mater South China University of TechnologyGuangzhou 510640China Center for the Structure of Advanced Matter School of Electronic EngineeringGuangxi University of Science and TechnologyLiuzhou 545006China Institute of Materials Science and Devices School of Materials Science and EngineeringSuzhou University of Science and TechnologySuzhou 215009China Institute of Metals Changsha University of Science&TechnologyChangsha 410004China Electron Microscopy for Materials Research(EMAT) University of AntwerpAntwerp 2020Belgium Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China School of Materials Science&Engineering Zhengzhou UniversityZhengzhou 4501China Advanced Membranes and Porous Materials Center Physical Sciences and Engineering DivisionKing Abdullah University of Science and TechnologyThuwal 23955-6900Saudi Arabia Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

Twin boundaries have been exploited to stabilize ultrafine grains and improve mechanical properties of *** production of the twin boundaries and nanotwins is however prohibitively challenging in carbide *** a scanning transmission electron microscope as a unique platform for atomic-scale structure engineering,we demonstrate that twin platelets could be produced in carbides by engineering antisite *** antisite defects at metal sites in various layered ternary carbides are collectively and controllably generated,and the metal elements are homogenized by electron irradiation,which transforms a twin-like lamellae into nanotwin *** chemical homogenization,α-Ti_(3)AlC_(2) transforms to unconventionalβ-Ti_(3)AiC_(2).The chemical homogeneity and the width of the twin platelets can be tuned by dose and energy of bombarding *** homogenized nanotwins can boost hardness by~45%.Our results provide a new way to produce ultrathin(<5 nm)nanotwin platelets in scientifically and technologically important carbide materials and showcase feasibility of defect engineering by an angstrom-sized electron probe.

关键词： electron-irradiation MAX phases carbides antisite defects crystal-structure engineering

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A Comprehensive Systematic Review: Advancements in Skin Cancer Classification and Segmentation Using the ISIC Dataset

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Computer Modeling in Engineering & sciences 2024年第9期140卷 2131-2164页

作者： Madiha Hameed Aneela Zameer Muhammad Asif Zahoor Raja Department of Computer Sciences Pakistan Institute of Engineering and Applied SciencesNilore50700Islamabad Future Technology Research Center National Yunlin University of Science and TechnologyDouliou64002TaiwanChina Directorate of IT Services University of GujratGujrat50700Pakistan

The International Skin Imaging Collaboration(ISIC)datasets are pivotal resources for researchers in machine learning for medical image analysis,especially in skin cancer *** datasets contain tens of thousands of dermoscopic photographs,each accompanied by gold-standard lesion diagnosis *** challenges associated with ISIC datasets have spurred significant advancements,with research papers reporting metrics surpassing those of human *** cancers are categorized into melanoma and non-melanoma types,with melanoma posing a greater threat due to its rapid potential for metastasis if left *** paper aims to address challenges in skin cancer detection via visual inspection and manual examination of skin lesion images,processes historically known for their *** notable advancements in machine learning and deep learning models,persistent challenges remain,largely due to the intricate nature of skin lesion *** review research on convolutional neural networks(CNNs)in skin cancer classification and segmentation,identifying issues like data duplication and augmentation *** explore the efficacy of Vision Transformers(ViTs)in overcoming these challenges within ISIC dataset *** leverage their capabilities to capture both global and local relationships within images,reducing data duplication and enhancing model ***,ViTs alleviate augmentation issues by effectively leveraging original *** a thorough examination of ViT-based methodologies,we illustrate their pivotal role in enhancing ISIC image classification and *** study offers valuable insights for researchers and practitioners looking to utilize ViTs for improved analysis of dermatological ***,this paper emphasizes the crucial role of mathematical and computational modeling processes in advancing skin cancer detection methodologies,highlighting their significance in improving algorithmic

关键词： Medical image skin cancer classification skin cancer segmentation international skin imaging collaboration convolutional neural network deep learning

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Stretchable wireless optoelectronic synergistic patches for effective wound healing

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npj Flexible Electronics 2024年第1期8卷 233-242页

作者： Qian Wang Siyuan Cai Guang Yao Liyuan Zhang Wenhao Lou Youxin Chen Qingqing Li Maowen Xie Xingyi Gan Chenzheng Zhou Taisong Pan Min Gao Kangning Zhao Zhen Cai Yuan Lin School of Materials and Energy University of Electronic Science and Technology of ChinaChengduSichuanChina Department of Plastic Surgery Sichuan Provincial People’s HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuanChina Department of Plastic and Cosmetic Surgery Xinqiao HospitalArmy Medical UniversityChongqingChina State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengduSichuanChina Shenzhen Institute for Advanced Study University of Electronic Science and Technology of ChinaShenzhenGuangdongChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhanHubeiChina Medico-Engineering Cooperation on Applied Medicine Research Center University of Electronic Science and Technology of ChinaChengduSichuanChina

Physiotherapies play a crucial role in noninvasive tissue engineering for wound ***,challenges such as the implementation of complex interventions and unsatisfactory treatment outcomes impede widespread ***,we proposed a stretchable and wirelessly-powered optoelectronic synergistic patch with a dual-layer serpentine wireless receiver circuit to drive the optoelectronic modulation *** structure and impedance matching enable the patch to seamlessly attach to irregular skin surfaces and operate robustly over a 30%tensile strain *** on Sprague-Dawley rat wound *** wound closure rate of the optoelectronic synergistic group significantly outperformed both monointervention and blank control ***,optoelectronic synergistic intervention enhances the secretion of vascular endothelial marker proteins and growth factors,and stabilizes mitochondrial function during oxidative ***,the scalable amalgamation of flexible electronics,wireless transmission,and synergistic interventions promise to improve wound care.

关键词： optoelectronic synergistic healing

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Microstructures and mechanical properties of a commercial Mg-Al-Zn-Mn alloy with various hot-extrusion processes

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Rare Metals 2024年第3期43卷 1329-1336页

作者： He Ma Fan-Zhi Meng Qiang Yang Ze-Feng Xie Yuan-Ding Huang Xin Qiu State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China School of Materials Science and Engineering Changchun University of Science and TechnologyChangchun130022China MagIC-Magnesium Innovation Center Helmholtz-Zentrum Geesthacht21502GeesthachtGermany Engineering Research Center of Optoelectronic Functional Materials Ministry of EducationChangchun University of Science and TechnologyChangchun130022China

Mg-Al-Zn-Mn(AZ)system alloys have become widely used due to their good castability,excellent formability and outstanding corrosion resistance[1-6].However,their strength is still much lower than that of traditional Mg... 详细信息

关键词： alloys alloy corrosion

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Worm-like ordered mesoporous carbon from liquefied wood:Morphological manipulation by varying hydrothermal temperature

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Aggregate 2024年第4期5卷 416-425页

作者： Yang Li Zhenwei Wu Yanhong Liu Kun Zhang Sha Luo Wei Li Shouxin Liu Key Laboratory of Bio-based Material Science and Technology of the Ministry of Education Northeast Forestry UniversityHarbinChina Engineering Research Center of Advanced Wooden Materials of the Ministry of Education Northeast Forestry UniversityHarbinChina

The hydrothermal/soft templating method is an effective way to synthesize ordered mesoporous carbon(OMC),yet the mechanism of this strategy is not well ***,a hydrothermal temperature-controlled approach is developed to precisely synthesize OMCs with well-defined morphologies from liquefied wood(LW).As the hydrothermal temperature increases from 130 to 210◦C,the hydrophilicity of the hydrophilic blocks decreases accompanied by the increase of the rel-ative volume of the hydrophobic block,resulting in the packing parameter p of micelles changing from p≤1/3 to 1/3

关键词： hydrothermal temperature-controlled liquefied wood ordered mesoporous carbon

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Accelerating urban street canyon wind flow predictions with deep learning method

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建筑模拟（英文版） 2025年第4期18卷 923-936页

作者： Wai-Chi Cheng Tzung-May Fu Shenzhen Key Laboratory of Precision Measurement and Early Warning Technology for Urban Environmental Health Risks School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhenGuangdong 518055China Guangdong Provincial Observation and Research Station for Coastal Atmosphere and Climate of the Greater Bay Area School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhenGuangdong 518055China Shenzhen Key Laboratory of Precision Measurement and Early Warning Technology for Urban Environmental Health Risks School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhenGuangdong 518055China Guangdong Provincial Observation and Research Station for Coastal Atmosphere and Climate of the Greater Bay Area School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhenGuangdong 518055China National Center for Applied Mathematics Shenzhen(NCAMS)ShenzhenGuangdong 518055China

Predicting wind flow statistics in urban areas is important for various environmental and engineering ***,building-resolved computational fluid dynamics(CFD)simulations are the most commonly used and reliable methods to simulate urban wind flows but they are time-consuming which limits their use in real ***,our objective is to develop a surrogate model based on deep learning(DL),which can be used as a faster alternative to CFD methods for urban *** proposed model hypothesis is that the spatial distributions of the time-averaged flow quantities within urban canopies are highly correlated to the local urban *** test this hypothesis,we developed a model to predict the flow in uniform urban street canyons by constructing a geometry reading filter to convert local urban geometry information around the targeted locations into a numerical array as DL model inputs.A standard feedforward DL model is then trained using large-eddy simulation(LES)results to predict the mean wind and turbulence within uniform street *** results show that the model can give fast and accurate predictions compared to LES *** prediction errors are found to range from 5.8%to 36%,and the normalized mean bias magnitudes range from 6.6×10-3 to 1.6×10-1 for the different flow *** DL model is also found to predict the flow patterns reasonably well,consistent with experimental data similar to the results of coarse-resolution *** model has the potential to be further developed into a robust and practical tool for fast urban flow predictions.

关键词： deep learning geometry reading filter large-eddy simulation neural network model urban wind flow prediction urban street canyons

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