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Tuning the dual-active sites of ZIF-67 derived porous nanomaterials for boosting oxygen catalysis and rechargeable Zn-air batteries

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Nano Research 2021年第7期14卷 2353-2362页

作者： Zeyi Zhang Yangyang Tan Tang Zeng Liyue Yu Runzhe Chen Niancai Cheng Shichun Mu Xueliang Sun College of Materials Science and Engineering Fuzhou UniversityFuzhou 350108China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Mechanical and Materials Engineering University of Western OntarioLondonON N6A 5B9Canada

The rational control of the active site of metal-organic frameworks(MOFs)derived nanomaterials is essential to build efficient bifunctional oxygen reduction/evolution reaction(ORR/OER)***,through designing and constructing a Co_(3)O_(4)-Co heterostructure embedded in Co,N co-doped carbon polyhedra derived(Co_(3)O_(4)-Co@NC)from the in-situ compositions of ZIF-67 and cobalt nanocrystals synthesized by the strategy of in-situ NaBH4 reduction,the dual-active site(Co_(3)O_(4)-Co and Co-N_(x))is synchronously realized in a MOFs derived *** formed Co_(3)O_(4)-Co@NC shows excellent bifunctional electrocatalytic activity with ultra-small potential gap(ΔE=E_(j=10)(OER)–E_(1/2)(ORR))of 0.72 V,which surpasses the commercial Pt/C and RuO_(2) *** theory calculation results reveal that the excellent bifunctional electrocatalytic activity can be attributed to the charge redistribution of Co of Co-N_(x) induced by the synergistic effects of well-tuned active sites of Co_(3)O_(4)-Co nanoparticle and Co-N_(x),thus optimizing the rate-determining step of the desorption of O_(2)^(*)intermediate in ORR and OH^(*)intermediate in *** rechargeable Zn-air batteries with our bifunctional catalysts exhibit superior performance as well as high cycling *** simple-effective optimization strategy offers prospects for tuning the active site of MOF derived bifunctional catalyst in electrochemical energy devices.

关键词： dual-active sites bifunctional oxygen electrocatalysts metal−organic frameworks Zn-air batteries density functional theory(DFT)

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Sulfur-linked carbonyl polymer as a robust organic cathode for rapid and durable aluminum batteries

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Journal of Energy Chemistry 2021年第12期30卷 320-327,I0007页

作者： Liang Fang Limin Zhou Lianmeng Cui Peixin Jiao Qinyou An Kai Zhang Department of Energy and Materials Engineering Dongguk University-SeoulSeoul 04620Republic of Korea Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Engineering Research Center of High-efficiency Energy Storage(Ministry of Education)Renewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin 300071China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528200GuangdongChina

Rechargeable aluminum batteries are believed as a promising next-generation energy-storage system due to abundant low-cost Al sources and high volumetric specific *** Al-storage cathodes,however,are plagued by strong electrostatic interaction between host materials and carrier ions,leading to large overpotential and undesired cycling stability as well as sluggish ion diffusion ***,sulfur-linked carbonyl polymer based on perylene-3,4,9,10-tetracarboxylic dianhydride(PTCDA) as the cathode materials for ABs is proposed,which demonstrates a small voltage polarization(135 mV),a reversible capacity of 110 mAh g^(-1) at 100 mA g^(-1) even after 1200 cycles,and rapid Al-storage *** with PTCDA,the sulfide polymer possesses higher working voltage because of its lower LUMO energy level according to theoretical *** ordered carbonyl active sites in sulfide polymer contribute to the maximized material utilization and rapid ion coordination and dissociation,resulting in superior rate ***,the bridged thioether bonds endow the polysulfide with robust and flexible structure,which inhibits the dissolution of active materials and improves cycling *** work implies the importance of ordered arrangement of redox active moieties for organic electrode,which provides the theoretical direction for the structural design of organic materials applied in multivalent-ion batteries.

关键词： Aluminum batteries Organic materials Carbonyl polymer Electrochemical active sites Ordered arrangement

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Scalable Assembly of Layered Dielectric Nanocomposites Filled with Perovskite Nanosheets for Flexible Electronics

SSRN

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SSRN 2024年

作者： Fu, Si Ren, Lele Wang, Jian Liu, Hexing Zhang, Pengchao Shen, Zhonghui Zhang, Xin Tu, Rong Zhang, Song Nan, Ce-Wen Li, Bao-Wen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China State Key Lab of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China

Polymer-based dielectrics have attracted much attention in the field of flexible electronics due to their excellent flexibility, dielectric and mechanical properties. However, the rational design of nanofiller-polymer nanocomposite for improving dielectric and mechanical properties remains challenging. Herein, layered nanocomposites filled with high-κ Ca2Nb3O10 perovskite nanosheets were fabricated via shear-flow induced alignment of nanosheets. The hierarchical structure and good dispersion of nanosheets endowed the layered nanocomposites with an outstanding modulus of 12.7 GPa and toughness of 1.8 MJ/m3. Meanwhile, the layered nanocomposites exhibited a high dielectric constant of 14.7, a low dielectric loss of 4.2%, and low leakage current density -7 A/cm2. The layered high-κ nanocomposites designed in this work will have broad application prospects in th flexible electronics. © 2024, The Authors. All rights reserved.

关键词： Perovskite

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Hardness-thermal stability synergy in nanograined Ni and Ni alloys:Superposition of nanotwin and low-energy columnar boundary

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Journal of materials Science & technology 2023年第6期137卷 123-131页

作者： F.H.Duan Y.Lin Q.Li J.H.Luan J.Lu J.Pan Y.Li Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Laboratory of Nanomaterials&Nanomechanics Department of Mechanical EngineeringCity University of Hong KongHong KongChina State Key Laboratory of Material Processing and Die&Mould Technology and School of Materials Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Department of Materials Science and Engineering City University of Hong KongHong KongChina Centre for Advanced Structural Materials Greater Bay Joint DivisionShenyang National Laboratory for Materials ScienceCity University of Hong Kong Shenzhen Research InstituteShenzhen 518057China City U-Shenzhen Futian Research Institute Shenzhen 518045China

Refining grains into nanoscale can significantly strengthen and harden metallic materials;however,nanograined metals generally exhibit low thermal stability,hindering their practical *** this work,we exploit the superposition of the contribution of nanotwins,low-angle grain boundaries,and microalloying to tailor superior combinations of high hardness and good thermal stability in Ni and Ni *** the nanotwinned Ni having a twin thickness of∼2.9 nm and grain size of 28 nm,it exhibits a hardness over 8.0 GPa and an onset coarsening temperature of 623 K,both of which are well above those of nanograined ***/Mo microalloying can further improve the onset coarsening temperature to 773 K without comprising *** analyses reveal that high hardness is achieved via strengthen-ing offered by extremely fine ***,the superior thermal stability is mainly ascribed to the low driving force for grain growth induced by the low-angle columnar boundary architecture and to the additional pinning effect on the migration of twin/columnar boundaries provided by minor Re/Mo *** present work not only reveals a family of nanotwinned metals possessing the combination of ultra-high hardness and high thermal stability but also provides a strategy for tailoring properties of metallic materials by pairing low-angle grain boundaries and twin boundaries.

关键词： Nanotwin Thermal stability Hardness Low-angle grain boundary Microalloying

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Articular cartilage and osteochondral tissue engineering techniques:Recent advances and challenges

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Bioactive materials 2021年第12期6卷 4830-4855页

作者： Wenying Wei Honglian Dai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Biomedical Materials and Engineering Research Center of Hubei ProvinceWuhan University of TechnologyWuhan430070China International School of Materials Science and Engineering Wuhan University of TechnologyWuhan430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan528200China

In spite of the considerable achievements in the field of regenerative medicine in the past several decades,osteochondral defect regeneration remains a challenging issue among diseases in the musculoskeletal system because of the spatial complexity of osteochondral units in composition,structure and *** order to repair the hierarchical tissue involving different layers of articular cartilage,cartilage-bone interface and subchondral bone,traditional clinical treatments including palliative and reparative methods have showed certain improvement in pain relief and defect *** is the development of tissue engineering that has provided more promising results in regenerating neo-tissues with comparable compositional,structural and functional characteristics to the native osteochondral *** in this review,some basic knowledge of the osteochondral units including the anatomical structure and composition,the defect classification and clinical treatments will be first *** we will highlight the recent progress in osteochondral tissue engineering from perspectives of scaffold design,cell encapsulation and signaling factor incorporation including bioreactor *** products for osteochondral defect repair will be analyzed and summarized ***,we will discuss the current obstacles and future directions to regenerate the damaged osteochondral tissues.

关键词： Osteochondral tissue engineering Cartilage tissue engineering Gradient scaffold Bioreactors

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Non‑Enzyme,Temperature Calibrating,and Bioactive Fiber‑based Flexible Sensors for Dopamine and Lactic Acid Detection

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advanced Fiber materials 2024年第2期6卷 501-511页

作者： Maowen Xie Guang Yao Xingyi Gan Chunhong Zhang Tianyao Zhang Qian Wang Xinqin Li Chenzheng Zhou Kangning Zhao Min Gao Taisong Pan Yuan Lin School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 610054SichuanChina State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054SichuanChina Medico‑Engineering Cooperation on Applied Medicine Research Center University of Electronic Science and Technology of ChinaChengdu 610054SichuanChina Shenzhen Institute for Advanced Study University of Electronic Science and Technology of ChinaShenzhen 518110China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070HubeiChina

Flexible electrochemical biosensors enable the in-situ monitoring and quantification of human biochemical constituents in molecular scale,spearheading and thriving the field toward precision ***,specific biorecognition elements for multiplexed biomarkers detection,temperature stability and versatility need to be improved for higher ***,we propose a bioactive sensor patch comprising a non-enzyme Co_(3)O_(4)/carbon fiber-based biorecognition element and a temperature calibration *** optimized serpentine configuration renders the sensor intimate and seamless attachment with skin,operating robustly even subjected to 40%tensile *** fiber-based sensor could selectively monitor dopa-mine and lactic acid contents based on cyclic voltammetry and amperometry,*** bioanalytical results at room temperature indicate that the electrochemical biosensor has a wide detection range(0.001–1.100 mM for dopamine and 2–35 mM for lactic acid),excellent selectivity and reproducibility(maximum error 3.2%for dopamine and 5.6%for lactic acid).In addition,temperature calibration contour maps of these two biomarkers are established in an ambient temperature range from 25 to 45℃.The continuously collected data could be aggregated and wirelessly transmitted to portable devices using an electrochemical signal transducer and an acquisition module,promising personalized and preventative health care in various scenarios.

关键词： Bioactive fiber Electrochemical selectivity Dopamine Lactic acid Temperature calibration Sensor

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Rationally Designing Anti-Poisoning Polymer Electrolyte by Electronegativity Modulation: Towards Efficient Ammonia-Cracked Hydrogen Fuel Cells

SSRN

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SSRN 2023年

作者： Shuai, Jiaqi Zhao, Shengqiu Liao, Yucong Wu, Fanglin Wang, Rui Wang, Letian Shen, Chunhui Tang, Haolin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Department of Polymer Materials & Engineering School of Material Science & Engineering Wuhan University of Technology Wuhan430070 China Hubei Key Laboratory of Fuel Cells Wuhan University of Technology Wuhan430070 China

Ammonia as a hydrogen enrichment medium has tremendous advantages over pure hydrogen in terms of transportation and utilization. The high-efficiency anti-ammonia-poisoning membrane electrode assembly (MEA) is pivotal for the practical implementation of ammonia-resistant proton exchange membrane fuel cells (PEMFCs). As for the polymer electrolyte, which is an integral part of the proton exchange membrane (PEM) and catalytic layer (CL) binder in the MEA, structural design is an effective way to improve its resistance to ammonia poisoning. Herein, an in-depth study of sulfonimides with superacidic structures reveals that the proton dissociation energies can be altered by tuning the terminal groups with different electronegativity and enhancing the competitive adsorption of protons on Pt. Four perfluorinated backbone sulfonimides (PFSI-x (x= TSM, MSA, ESA, and iPSA)) with distinct charge delocalization were fabricated by grafting different electronegative monomers onto the perfluorosulfonyl fluoride (PFSF). The results show that PFSI-TSM possesses a higher electrostatic potential (2.69 eV) and the lowest activation energy (12.07 KJ/mol). Meanwhile, the performance of the PFSI-TSM PEM fuel cell is 40.6% higher than the PFSA at 80°C, 100% relative humidity (RH) under 100 ppm NH3, with a maximum power density of 635.2 mW/cm2. The underlying reason for enhanced performance is in virtue of the more electronegative end groups render the superacid electrolyte with higher acidity and pKa values, which change the direction of the acid dissociation equilibrium reaction on the Pt surface, enhance the competitive adsorption of protons in the MEA and reduces the probability of ammonia adsorption poisoning. The insights in charge delocalization and proton ionization construct the structure-property relationship which would provide the guidance for a rational design of PEM for ammonia-resistant fuel cells. © 2023, The Authors. All rights reserved.

关键词： Electronegativity

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Biomimetic brain-like nanostructures for solid polymer electrolytes with fast ion transport

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Science China materials 2022年第6期65卷 1476-1484页

作者： Ahmed Eissa Abdelmaoula Lulu Du Lin Xu Yu Cheng Amir AMahdy Muhammad Tahir Ziang Liu Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200China Mining and Metallurgical Department Faculty of EngineeringAl-Azhar UniversityCairo 11884Egypt

The intrinsic drawbacks of electrolytes and the growth of lithium dendrites limit the development of commercial lithium *** address the aforementioned challenges,a novel biomimetic brain-like nanostructure(BBLN)solid polymer electrolyte was created by manipulating the shape of the incorporated *** designed BBLN solid polymer electrolyte was created by incorporating spherical core-shell(UIO-66@67)fillers into polymer electrolyte,which is significantly different from traditional polymer-based composite ***-66@67 spherical nanoparticles are highly favorable to eliminating polymer electrolyte stress and deformation during solidification,indicating a great potential for fabricating highly uniform BBLN solid polymer electrolytes with a substantial number of continuous ***,spherical nanoparticles can significantly reduce the crystalline structure of polymer electrolytes,improving polymer chain segmental movement and providing continuous pathways for rapid ion *** a result,BBLN solid polymer electrolyte shows excellent ionic conductivity(9.2×10^(−4)S cm^(−1)),a high lithium transference number(0.74),and outstanding cycle stability against lithium electrodes over 6500 h at room *** concept of biomimetic brain-like nanostructures in this work demonstrates a novel strategy to enhance ion transport in polymerbased electrolytes for solid-state batteries.

关键词： brain structure spherical nanoparticles continuous interphase nanophase separation MOF-in-MOF

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Nitrogen‐doped tin oxide electron transport layer for stable perovskite solar cells with efficiency over 23%

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Interdisciplinary materials 2022年第2期1卷 309-315页

作者： Yanping Mo Chao Wang Xuntian Zheng Peng Zhou Jing Li Xinxin Yu Kaizhong Yang Xinyu Deng Hyesung Park Fuzhi Huang Yi‐Bing Cheng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanP.R.China Solar Hydrogen Production Lab Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong LaboratoryFoshanP.R.China International School of Materials Science and Engineering Wuhan University of TechnologyWuhanP.R.China Department of Materials Science and Engineering Graduate School of Semiconductor Materials and Devices EngineeringPerovtronics Research CenterLow Dimensional Carbon Materials CenterUlsan National Institute of Science and TechnologyUlsanRepublic of Korea

Tin oxide has made a major breakthrough in high-efficiency perovskite solar cells(PSCs)as an efficient electron transport layer by the low-temperature chemical bath deposition ***,tin oxide often contains pernicious defects,resulting in unsatisfactory ***,we develop high-quality tin oxide films via a nitrogen-doping strategy for high-efficiency and stable planar *** aligned energy level at the interface of doped SnO_(2)/perovskite,more excellent charge extraction and reduced nonradiative recombination contribute to the enhanced efficiency and ***,the power conversion efficiency of the devices based on N‐SnO_(2) film increases to 23.41% from 20.55% of the devices based on the pristine SnO_(2).The N-SnO_(2) devices show an outstanding stability retaining 97.8% of the initial efficiency after steady-state output at a maximum power point for 600s under standard AM1.5G continuous illumination without encapsulation,while less than 50% efficiency remains for the devices based on pristine SnO_(2).This simple scalable strategy has shown great promise toward highly efficient and stable PSCs.

关键词： electron transport layer N doping perovskite solar cell SnO_(2)

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Tailoring Microstructure and Mechanical Property of Pure Tungsten Via Laser Powder Bed Fusion

SSRN

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SSRN 2023年

作者： Xiong, Zhengang Ma, Wenyou Deng, Zhaoyang Yu, Chunfeng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Institute of New Materials Guangdong Academy of Sciences Guangzhou510650 China

Microstructure tailoring is a fascinating project for material scientists that enables the mechanical properties of metallic parts to be customized. In this study, a series of laser parameter settings were implemented to manufacture dense tungsten parts and three laser travelling strategies were developed to tailor the microstructure via laser powder bed fusion (LPBF). A novel brick-stacking structure and interlocked S-shaped grains were observed in these dense samples. Among different strategy tungsten builds, typical indentation size effect (ISE) was found based on the indentation responses. As-measured indentation hardness could be thought of the sum of contribution from surface and volume. Although their ISE was similar, the contribution from plastically volume work varied, which could be primarily interpreted by rotation strategy. The rotation strategy significantly reduced the grain size and thermal stress during laser manufacturing, resulting in higher true hardness (~ 3.5 GPa). Additionally, the compression properties and associated fracture behavior of tungsten specimens manufactured by the different strategies were also compared. Therefore, these findings show that controlling laser travelling strategy during the LPBF process could be a powerful avenue to tailor the microstructure and performance of the customized components. © 2023, The Authors. All rights reserved.

关键词： Hardness

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