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Ordering-induced Elinvar effect over a wide temperature range in a spinodal decomposition titanium alloy

Journal of materials science & technology 2023年第19期150卷 245-255页

作者： D.L.Gong H.L.Wang S.H.Hao P.Liu X.Yang Y.N.Jiang W.J.Wang K.Lin B.Li K.Du Y.D.Wang R.Yang Y.L.Hao Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China School of Mechanical Engineering Dongguan University of TechnologyDongguan 523808China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Analysis and Testing Center Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Beijing Advanced Innovation Center for Materials Genome Engineering Institute of Solid State ChemistryDepartment of Physical ChemistryUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

Temperature-independent elastic modulus is termed as Elinvar effect,which is available by tuning the continuous spin transition of ferromagnetic alloys via composition optimization and the first-order martensitic transformation of shape memory alloys via plastic ***,these reversible mechanisms are restricted generally in a narrow temperature range of less than 300 *** reports,by tuning a spinodal decomposition in a Ti-Nb-based titanium alloy via aging treatment,both the Elinvar effect in a wide temperature range of about 500 K and a high strength-to-modulus ratio of about 1.5%can be obtained by a continuous and reversible crystal ordering *** results demonstrate that the alloy aged at 723 K for 4 h has a nanoscale plate-like modulatedβ+α"two-phase microstructure and its elastic modulus keeps almost constant from 100 to 600 *** and in-situ X-ray diffraction measurements reveal that the crystal ordering parameter of theα"phase increases linearly with temper-ature from 0.88 at 133 K to 0.97 at 523 K but its volume fraction keeps a constant of about 33.8%.This suggests that the continuous ordering of theα"phase toward the high modulusαphase induces a posi-tive modulus-temperature relation to balance the negative relation of the elastically stableβ*** aged alloy exhibits a high yield strength of 1200 MPa,good ductility of 16%and a high elastic admissible strain of 1.5%.Our results provide a novel strategy to extend the Elinvar temperature range and enhance the strength by tuning the crystal ordering of decomposition alloys.

关键词： Titanium alloy Spinodal decomposition Crystal ordering Elinvar effect Mechanical properties

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Twin-twin geometric structure effect on the twinning behavior of an Mg-4Y-3Nd-2Sm-0.5Zr alloy traced by quasi-in-situ EBSD

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Journal of Magnesium and Alloys 2023年第4期11卷 1381-1392页

作者： Yunwei Gui Quanan Li Yibei Xue Lingxiao Ouyang School of Materials Science and Engineering Henan University of Science and TechnologyLuoyang 471023China Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology Luoyang 471023China Department of Materials Processing Graduate School of EngineeringTohoku University6-6-11 AobaAramakiAoba-kuSendai 980-8579Japan School of Materials Science and Engineering Northwestern Polytechnical UniversityXi’an 710072China

We studied the microstructure evolution of Mg-4Y-3Nd-2Sm-0.5Zr alloy by quasi-in-situ electron backscatter diffraction(EBSD)along with several strains under compression tests,which provided direct evidence for the influence of different twin-twin geometric structure on the twinning *** results showed that the mechanical properties of the alloy were higher than traditional magnesium alloys(the maximum compressive strength reaches 402.5 MPa)due to the strengthening effect of Sm and Nd elements addition on solution strengthening,precipitation strengthening,and grain *** with the quasi-in-situ EBSD technique,two different twin-twin geometric structures,‘parallel structure’and‘cross structure’,were observed directly in the *** the later stage of deformation,for‘parallel structure’,residual stress and a large number of dislocations mainly existed in the twin boundary and tip *** the‘cross structure’,there was a lot of dislocation density in the interior of twins after *** twin growth rate of‘parallel structure’was much faster than that of‘cross structure’because the stress of twins was mainly concentrated on the tip of *** the movement for the tip of twin was blocked,the growth rate of twin would be obviously ***,the‘cross structure’was easy to produce closed *** to the constraints of surrounding twins,the confined space was easy to stress concentration,thus inhibiting the growth of *** the same time,the‘cross structure’of twins needed a more external force to continue to deform,which also served as a strengthening structure.

关键词： Mg-RE alloy Mechanical testing Twinning Quasi-in-situ EBSD

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Dense carbon nanofiber self-supporting electrode fabricated by orientation/compaction strategy for high volumetric lithium storage capacity

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Progress in Natural science:materials International 2025年第1期35卷 229-237页

作者： Haihui Liu Chaoqun Chen Qiang Xu Yan Song Xiangwu Zhang Chang Ma Tianjin Municipal Key Lab of Advanced Fiber and Energy Storage Technology Tiangong University CAS Key Laboratory of Carbon Materials Institute of Coal Chemistry Chinese Academy of Sciences Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science Wilson College of Textiles North Carolina State University

Low bulk density greatly restricts the large-scale application of electrospun carbon-based fiber membrane as electrode in energy storage devices. To solve the above challenges, herein an orientation-compaction densification strategy is proposed to enhance the bulk density and volumetric capacity of PAN-based carbon nanofiber membranes as self-supporting electrode used in lithium-ion batteries（LIBs）. Specifically, highly-oriented fibers are achieved by high-speed roller collecting during electrospinning, and compaction densification is conducted by hot-pressing treatment. The effects of collecting speed and hot-pressing pressure on the morphology, conductivity,bulk density, tensile strength, and flexibility of the obtained carbon nanofiber membrane are *** to conventional fiber membranes, of which fibers are disorderly stacked, the oriented fiber membrane is much easier to achieve dense stacking by compaction. The obtained dense carbon nanofiber membrane demonstrates a bulk density of 0.566 g cm-3, and shows a significantly-enhanced volumetric capacity(318.3 mA h cm-3), high-rate performance(86.6 mA h cm-3at 5 A g-1), and satisfactory cycling stability when used as selfsupporting electrode of LIBs.

关键词： Bulk density Densification Electrospinning Orientation-compaction Volumetric capacity

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Flexible,durable,and anti-fouling nanocellulose-based membrane functionalized by block copolymer with ultra-high flux and efficiency for oil-in-water emulsions separation

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Nano Research 2023年第4期16卷 5665-5675页

作者： Jianfei Wu Yuxuan Su Ziwei Cui Yang Yu Jiafu Qu Jundie Hu Yahui Cai Jianzhang Li Dan Tian Qichun Zhang Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037China School of Materials Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China Department of Materials Science and Engineering&Center of Super-Diamond and Advanced Films(COSDAF) City University of Hong KongHong Kong 999077China

The clearwater obtained from stabilized oily wastewater has become a worldwide ***,the area of oil/water emulsion separation materials have accomplished great progress,but still faces the enormous problems of low flux,poor stability,and pollution ***(cellulose nanocrystals(CNC))with the advantages of hydrophilicity,ecofriendliness,and regeneration are ideal materials for the construction of separation *** this paper,a flexible,antifouling,and durable nanocellulose-based membrane functionalized by block copolymer(poly(N-isopropylacrylamide)-b-poly(N,Ndimethylaminoethyl methacrylate))is prepared via chemical modification and self-assembly,showing high separation efficiency(above 99.6%)for stabilized oil-in-water emulsions,excellent anti-fouling and cycling stability,high-temperature resistance,and acid and alkali *** importantly,the composite membrane has ultra-high flux in separating oil-in-water emulsions(29,003 L·m^(−2)·h^(−1)·bar^(−1))and oil/water mixture(51,444 L·m^(−2)·h^(−1)·bar^(−1)),which ensures high separation *** its durability,easy scale-up,and green regeneration,we envision this biomass-derived membrane will be an alternative to the existing commercial filter membrane in environmental remediation.

关键词： nanocellulose-based membrane oil/water emulsions separation ultra-high flux good durability anti-fouling property

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Dual‑Donor‑Induced Crystallinity Modulation Enables 19.23% Efficiency Organic Solar Cells

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Nano-Micro Letters 2025年第3期17卷 376-388页

作者： Anhai Liang Yuqing Sun Sein Chung Jiyeong Shin Kangbo Sun Chaofeng Zhu Jingjing Zhao Zhenmin Zhao Yufei Zhong Guangye Zhang Kilwon Cho Zhipeng Kan Center On Nanoenergy Research Institute of Science and Technology for Carbon Peak&NeutralitySchool of Physical Science&TechnologyGuangxi UniversityNanning 530004People’s Republic of China Department of Chemical Engineering Pohang University of Science and TechnologyPohang 37673South Korea College of New Materials and New Energies Shenzhen Technology UniversityShenzhen 518118People’s Republic of China Zhejiang Engineering Research Center for Fabrication and Application of Advanced Photovoltaic Materials School of Materials Science and EngineeringNingboTech UniversityNingbo 315100People’s Republic of China State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures Nanning 530004People’s Republic of China

Trap-assisted charge recombination is one of the primary limitationsof restricting the performance of organic solar cells. However, effectivelyreducing the presence of traps in the photoactive layer remains ***, wide bandgap polymer donor PTzBI-dF is demonstrated as an effectivemodulator for enhancing the crystallinity of the bulk heterojunction active layerscomposed of D18 derivatives blended with Y6, leading to dense and orderedmolecular packings, and thus, improves photoluminescence quenching *** a result, the photovoltaic devices exhibit reduced trap-assisted charge recombinationlosses, achieving an optimized power conversion efficiency of over 19%.Besides the efficiency enhancement, the devices comprised of PTzBI-dF as athird component simultaneously attain decreased current leakage, improved chargecarrier mobilities, and suppressed bimolecular charge recombination, leading toreduced energy losses. The advanced crystalline structures induced by PTzBI-dFand its characteristics, such as well-aligned energy level, and complementaryabsorption spectra, are ascribed to the promising performance *** findings suggest that donor phase engineering is a feasible approach to tuning the molecular packings in the active layer, providingguidelines for designing effective morphology modulators for high-performance organic solar cells.

关键词： Trap-assisted charge recombination Photoluminescence Miscibility Current leakage Power conversion efficiency

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Comprehensive review of advances in machine-learning-driven optimization and characterization of perovskite materials for photovoltaic devices

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Journal of Energy Chemistry 2025年第2期101卷 298-323,I0007页

作者： Bonghyun Jo Wenning Chen Hyun Suk Jung School of Advanced Materials Science and Engineering Sungkyunkwan UniversitySuwon 16419Republic of Korea SKKU Institute of Energy Science and Technology(SIEST) Sungkyunkwan UniversitySuwon 16419Republic of Korea Department of Future Energy Engineering Sungkyunkwan UniversitySuwon 16419Republic of Korea

Perovskite solar cells(PSCs)have developed rapidly,positioning them as potential candidates for nextgeneration renewable energy ***,conventional trial-and-error approaches and the vast compositional parameter space continue to pose challenges in the pursuit of exceptional performance and high stability of perovskite-based *** increasing demand for novel materials in optoelectronic devices and establishment of substantial databases has enabled data-driven machinelearning(ML)approaches to swiftly advance in the materials *** review succinctly outlines the fundamental ML procedures,techniques,and recent breakthroughs,particularly in predicting the physical characteristics of perovskite ***,it highlights research endeavors aimed at optimizing and screening materials to enhance the efficiency and stability of ***,this review highlights recent efforts in using characterization data for ML,exploring their correlations with material properties and device performance,which are actively being researched,but they have yet to receive significant ***,we provide future perspectives,such as leveraging Large Language Models(LLMs)and text-mining,to expedite the discovery of novel perovskite materials and expand their utilization across various optoelectronic fields.

关键词： Perovskite solar cell Data-driven machine learning Characterization Perovskite materials

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Indolocarbazole-Based Small Molecule Cathode-Active Material Exhibiting Double Redox for High-Voltage Li-Organic Batteries

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Energy & Environmental materials 2024年第5期7卷 86-94页

作者： Hyunji Park Hyojin Kye Jong-Sung Lee Young-Chang Joo Dong Joo Min Bong-Gi Kim Soo Young Park Ji Eon Kwon Laboratory for Supramolecular Optoelectronic Materials(LSOM) Department of Materials Science and EngineeringResearch Institute of Advanced Materials(RIAM)Seoul National University1 Gwanak-roGwanak-guSeoul 08826Korea Functional Composite Materials Research Center Jeonbuk Institute of Advanced Composite MaterialsKorea Institute of Science and Technology(KIST)92 Chudong-roBongdong-eupWanju-gunJeonbuk 55324Korea Department of Organic and Nano System Engineering Konkuk University120 Neungdong-roGwangjin-guSeoul 05029Korea Department of Materials Science and Engineering Seoul National University1 Gwanak-roGwanak-guSeoul 08826Korea Department of JBNU-KIST Industry Academia Convergence Research Jeonbuk National University567 Baekje-daeroDeokjin-guJeonjuJeonbuk 54896Korea

Most organic electrode materials(OEMs)for rechargeable batteries employ n-type redox centers,whose redox potentials are intrinsically limited<3.0 V versus Li^(+)/***,p-type materials possessing high redox potentials experience low specific capacities because they are capable of only a single redox reaction within the stable electrochemical window of typical ***,we report 5,11-diethyl-5,11-dihydroindolo[3,2-b]carbazole(DEICZ)as a novel p-type OEM,exhibiting stable plateaus at high discharge potentials of 3.44 and 4.09 V versus Li^(+)/***,the second redox potential of DEICZ is within the stable electrochemical *** mechanism of the double redox reaction is investigated using both theoretical calculations and experimental measurements,including density functional theory calculations,ex situ electron spin resonance,and X-ray photoelectron ***,hybridization with single-walled carbon nanotubes(SWCNT)improves the cycle stability and rate performance of DEICZ owing to theπ-πinteractions between the SWCNT and co-planar molecular structure of DEICZ,preventing the dissolution of active materials into the *** DEICZ/SWCNT composite electrode maintains 70.4%of its initial specific capacity at 1-C rate and also exhibits high-rate capability,even performing well at 100-C ***,we demonstrate its potential for flexible batteries after applying 1000 bending stresses to the composite electrode.

关键词： composite electrodes flexible batteries indolocarbazoles organic rechargeable batteries p-type

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Enhancement of–OH content on mechanical properties of antiperovskite solid electrolytes

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Nano Research 2024年第7期17卷 6139-6146页

作者： Zunqiu Xiao Huaying Wang Ningyuan Cai Yutong Li Kejia Xiang Wei Wei Tao Ye Zhongtai Zhang Shitong Wang Zilong Tang State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China College of New Energy Advanced Chemical Engineering and Energy Materials Research CenterChina University of Petroleum(East China)Qingdao 266580China Department of Nuclear Science and Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA

All-solid-state batteries,renowned for their enhanced safety and high energy density,have garnered broad *** solid electrolytes are highly anticipated for their balanced ***,their high Young’s modulus and inadaptability to volume change during cycling lead to poor contact and eventual battery *** this work,Young’s modulus of Li_(1+x)(OH)_(x)Cl samples is lowered to a level comparable to that of sulfide by regulating the–OH *** the–OH content increases,Young’s modulus of Li_(1+x)(OH)_(x)Cl samples decreases *** may be due to the local aggregation of–OH groups,forming cavities similar to LiOH structure,which reduces the bonding of the *** the premise of high Li-ion conductivity and electrochemical stability,the lowered Young’s modulus improves the contact between the solid electrolyte and the electrodes,forming a strong and stable interfacial layer,thereby improving interfacial and cycling *** symmetrical lithium metal cell shows excellent cycle performance of 600 h,and the assembled LiFePO_(4)|Li_(2.4)(OH)1.4Cl|Li cell shows significantly enhanced cycling endurance with 80%capacity retention after 150 *** work not only emphasizes the crucial importance of Young’s modulus in improving interface issues but also offers innovative approaches to advance the mechanical properties of solid electrolytes.

关键词： mechanical properties -OH content anti-perovskite solid electrolytes Li-ion batteries

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Non-destructive buffer enabling near-infrared-transparent inverted inorganic perovskite solar cells toward 1400 h light-soaking stable perovskite/Cu(In,Ga)Se_(2) tandem solar cells

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Journal of Energy Chemistry 2024年第10期97卷 622-629,I0013页

作者： Yu Zhang Zhaoheng Tang Zhongyang Zhang Jiahong Tang Minghua Li Siyuan Zhu Wenyan Tan Xi Jin Tongsheng Chen Jinsong Hu Chao Zhou Chunlei Yang Qijie Liang Xugang Guo Weimin Li Weiqiang Chen Yan Jiang MOE Key Laboratory of Laser Life Science&Guangdong Provincial Key Laboratory of Laser Life Science Guangzhou Key Laboratory of Spectral Analysis and Functional ProbesCollege of BiophotonicsSouth China Normal UniversityGuangzhou 510631GuangdongChina school of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Songshan Lake Materials Laboratory Dongguan 523429GuangdongChina Department of Materials Science and Engineering Guangdong Provincial Key Laboratory of Functional Oxide Materials and DevicesSouthern University of Science and TechnologyShenzhen 518055GuangdongChina Beijing Advanced Innovation Center for Soft Matter Science and Engineering College of Chemical EngineeringCollege of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Department of Physics Liaoning UniversityShenyang 110036LiaoningChina Beijing National Laboratory for Molecular Sciences(BNLMS) Institute of ChemistryChinese Academy of SciencesBeijing 100190China School of Physics and Materials Science Guangzhou UniversityGuangzhou 510006GuangdongChina Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 18055GuangdongChina

Near-infrared(NIR)transparent inverted all-inorganic perovskite solar cells(PSCs)are excellent top cell candidates in tandem *** essential challenge is the replacement of metal contacts with transparent conductive oxide(TCO)electrodes,which requires the introduction of a buffer layer to prevent sputtering *** this study,we show that the conventional buffers(i.e.,small organic molecules and atomic layer deposited metal oxides)used for organic-inorganic hybrid perovskites are not applicable to all-inorganic perovskites,due to non-uniform coverage of the vulnerable layers underneath,deterioration upon ion bombardment and moisture induced perovskite phase transition,A thin film of metal oxide nanoparticles by the spin-coating method serves as a non-destructive buffer layer for inorganic ***-inorganic inverted near-infrared-transparent PSCs deliver a PCE of 17.46%and an average transmittance of 73.7%between 780 and 1200 *** combination with an 18.56%Cu(In,Ga)Se_(2) bottom cell,we further demonstrate the first all-inorganic perovskite/CIGS 4-T tandem solar cell with a PCE of 24.75%,which exhibits excellent illumination stability by maintaining 86.7%of its initial efficiency after 1400 *** non-destructive buffer lays the foundation for efficient and stable NIR-transparent inverted inorganic perovskite solar cells and perovskite-based tandems.

关键词： CsPbI_(3)perovskite Inverted perovskite solar cells Tandem solar cells Buffer layer Stability

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Revealing the miscibility chemistry of ionic liquids in water-in-salt electrolytes toward high-voltage and high-temperature aqueous potassium-ion supercapacitors

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science Bulletin 2025年第10期70卷 1576-1580页

作者： Chen, Jianchao Zhang, Guanghao Zhang, Hong Zhang, Shuxian Li, Qingyu Zhu, Chunyan Man, Xiaoge Zhang, Zhiwei Shi, Yuanchang Li, Tao Han, Ye Zhang, Mengqi Yin, Longwei Wang, Rutao Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education School of Materials Science and Engineering Shandong University Jinan250061 China Department of Materials Engineering Xuzhou College of Industrial Technology Xuzhou221140 China College of Materials Science and Engineering Shandong University of Science and Technology Qingdao266590 China The 18th Research Institute of China Electronics Technology Group Corporation Tianjin300384 China Key Laboratory of Advanced Energy Materials Chemistry Ministry of Education Nankai University Tianjin300071 China Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai Yantai264003 China

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