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A donor-acceptor conjugated bipolar polymer with multielectron redox sites for long-cycle-life and high-rate aqueous zinc dual-ion batteries

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Journal of Energy Chemistry 2025年第3期102卷 144-150页

作者： Lian-Wei Luo Siteng Zhu Wen Yan Ma Dan Li Chong Zhang Jia-Xing Jiang Key Laboratory of Optoelectronic Chemical Materials and Devices(Ministry of Education) School of Optoelectronic Materials&TechnologyJianghan UniversityWuhan 430056HubeiChina Key Laboratory for Macromolecular Science of Shaanxi Province Shaanxi Engineering Laboratory for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an 710062ShaanxiChina

Aqueous zinc-ion batteries(AZIBs)have hugely latent advantages in large-scale energy storage due to its innate safety,reasonable price,and ***,most AZIB cathode materials suffer from short cycling life and poor rate ***,a bipolar donor-acceptor(D-A)conjugated microporous polymer(PTZ-BDTB),consisting of electron-withdrawing benzo[1,2-b:4,5-b']dithiophene-4,8-dio ne(BDTB)units and electron-donating phenothiazine(PTZ)units,is developed as the cathode material of aqueous zinc dual-ion batteries(AZDIBs).The D-A type structure design could reduce the band gap,thus promoting electron transfer in the polymer ***,the PTZ-BDTB cathode in a30 mol/kg(m)ZnCl_(2)water-in-salt electrolyte exhibits a high reversible capacity of 202 mA h g^(-1)at0.05 A g^(-1)with excellent rate performance(109 mA h g^(-1)at 15 A g^(-1)),which is far superior to its counterpart polymers PPTZ and ***,PTZ-BDTB shows ultra-stable cycle performance with capacity retention ratios of 76.2%after 460 cycles at 0.05 A g^(-1)and 96%after 27000 cycles at 5 A g^(-1).PTZBDTB also exhibits a low self-discharge ability with capacity retention about 76.4%after resting the battery for 28 *** results demonstrate that D-A type structural design is a promising strategy for constructing high performance cathode materials for AZDIBs.

关键词： Conjugated microporous polymer Donor-acceptor structure Bipolar organic cathode material Aqueous zinc dual-ion batteries

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Low sintering shrinkage porous ceramics: Principles, progress, and perspectives

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Journal of advanced Ceramics 2025年第2期14卷 1-36页

作者： Jie Xu Yueqi Shao Xiaoying Feng Xiaoyan Zhang Hao Li Jinlong Yang Feng Gao State Key Laboratory of Solidification Processing MIIT Key Laboratory of Radiation Detection Materials and DevicesSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Porous ceramics are lightweight materials with diverse pore structures and are widely applied in areas such as thermal insulation, sound absorption, filtration, catalysis, and energy storage. However, excessive shrinkage during the sintering process of porous ceramics leads to cracking and deterioration, posing significant challenges for achieving complex shapes. Despite its importance, the field of low sintering shrinkage porous ceramics has not received sufficient attention. This review systematically discusses the principles and progress in the development of low sintering shrinkage porous ceramics. First, we introduce the characteristics of various preparation methods, including partial sintering, particle-stabilized foaming, gel-casting, foam-gelcasting, and additive manufacturing (AM). We then explain three primary principles of low sintering shrinkage from the perspectives of the volume effect and mass transfer processes. This review focuses on the properties and applications of typical low sintering shrinkage ceramics such as mullite and alumina, particularly their mechanical properties and thermal conductivity as thermal insulation and ceramic cores. Finally, we summarize the current state and present future perspectives on low sintering shrinkage porous ceramics.

关键词： porous ceramics low sintering shrinkage volume expansion mass transfer process pore structure properties

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The d-p orbital hybridization engineered RhPb bimetallene for efficient ethanol electrooxidation

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science China Chemistry 2025年第5期68卷 1897-1905页

作者： Bo-Qiang Miao Zi-Han Yuan Qing-Ling Hong Xuan Ai Fu-Min Li Pei Chen Pu-Jun Jin Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province Shaanxi Key Laboratory for Advanced Energy DevicesSchool of Materials Science and EngineeringShaanxi Normal University MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter School of PhysicsXi'an Jiaotong University

The construction of bimetallic sites with strong interaction can effectively regulate the electronic structure and modulate the adsorption behavior of adsorbate species on bimetallic catalysts, thereby overcoming catalytic bottlenecks. Herein, an RhPb bimetallene(RhPb b-ML) with the strong d-p orbital hybridization is proposed for efficiently catalyzing ethanol oxidation reaction(EOR). Notably, the specific EOR activity of RhPb b-ML is 32 and 6.8 times higher than those of Rh metallene and commercial Pt/C, respectively. Theoretical calculation analysis reveals that the introduction of Pb atoms into the Rh lattice leads to an upward shift of the d-band center of Rh on RhPb(111). The shift in the d-band center is primarily attributed to the different degrees of hybridization between the d sub-orbitals of Rh and the p-orbitals of Pb, which enhance the adsorption of key species and improve EOR activity and selectivity. In-situ infrared tests and high-performance liquid chromatography tests together confirm that RhPb b-ML not only exhibits enhanced ability for the breakage of C–C bonds but also effectively suppresses the generation of absorbed CO. Furthermore, the strategy of enhancing catalyst performance through the strong d-p orbital hybridization has been demonstrated to be scalable to other bimetallic catalysts, providing valuable insights for the design of advanced catalysts.

关键词： RhPb bimetallene d-p orbital hybridization electronic structure ethanol oxidation reaction selectivity

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Incommensurate modulated structure and its influence on the martensitic transformation temperature span of single phase multielement Ni-Cu-Co-Mn-Ga two-way shape memory single crystals

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材料科学技术（英文版） 2025年第5期208卷 230-240页

作者： Qijjia Yu Yang Liu Chen Si Wenjia Wang Jiaxi Meng Jingmin Wang Jinghua Liu Chengbao Jiang Key Laboratory of Advanced Aerospace Materials and Performance(Ministry of Education) School of Materials Science and EngineeringBeihang UniversityBeijing 100191PR China Center of Microstructure Science Frontier Institute of Science and TechnologyState Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong UniversityXi'an 710049PR China

Significant two-way shape memory effect(TWSME)was achieved in single crystals of single-phase mul-tielement Ni42-xCu8CoxMn37Ga13(8 ≤ x ≤ 12)alloys by performing thermomechanical ***,anomalous dependence of the martensitic transformation temperature span on Co content was *** training,quite a narrow temperature span of the martensitic transformation,nearly independent of the Co content,was observed in all single *** training the temperature span was still narrow for 8 ≤ x ≤ 10.9 but was obviously expanded for 10.9＜x ≤ ***-resolution transmission electron microscopy revealed that at the atomic scale,there exists incommensurate modulated structure in the single phase single crystals,as evidenced by nonperiodic satellite spots in the selected area electronic diffraction ***,the modulated wave vector of the satellite spots was increased by higher Co *** first principal calculations it was considered that the incommensurate modulated structure originates from the formation of Co-Co *** training arrays of ordered dislocations with the same Burgers vector were introduced for 8 ≤ x ≤ 10.9 but the network of dislocations was formed for 10.9＜x ≤ *** on analysis of transmission electron microscopy,geometric phase,thermody-namics,and Landau theory,it was considered that the austenite/martensite phase interface was pinned by the network of dislocations,expanding the temperature span of the martensitic *** work supplies new insights for understanding the microstructure and martensitic transformation of Ni-Mn-Ga-based alloys.

关键词： Martensitic transformation Incommensurate modulated structure Temperature span Dislocation Two-way shape memory effect

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Significantly reduced thermal conductivity through dual-site high-entropy strategy in rare-earth hexaaluminates

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Ceramics International 2025年第13期51卷 17473-17483页

作者： Zhou, Lin Liu, Ji-Xuan Peng, Pai Zhang, Qinghong Zhang, Guo-Jun State Key Laboratory of Advanced Fiber Materials Institute of Functional Materials College of Materials Science and Engineering Donghua University Shanghai201620 China

LaMgAl11O19 (LMA) is an important thermal barrier coating (TBC) material due to its remarkable fracture toughness, excellent sintering resistance and better thermal stability, but the relatively high thermal conductivity limits its application. In this work, single-site high-entropy rare-earth hexaaluminates (La0.2Nd0.2Sm0.2Eu0.2Gd0.2)MgAl11O19 (HE-L), La(Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)Al11O19 (HE-M) and dual-site high-entropy rare-earth hexaaluminates (La0.2Nd0.2Sm0.2Eu0.2Gd0.2)(Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)Al11O19 (HE-LM) ceramics were successfully fabricated by solid-state reaction sintering, and their phase evolution process, mechanical and thermal properties were analyzed. The phase evolution process for the high-entropy rare-earth hexaaluminate is similar to that of the single-component LMA. The dual-site HE-LM ceramic exhibits a significant increase in Vickers hardness (13.63 GPa), fracture toughness (4.18 MPa‧m1/2) and a decrease in thermal conductivity (2.02–2.55 W·m−1·K−1, 25–1100 °C) as compared to the LMA ceramics. This work demonstrates the excellent mechanical and thermophysical properties of the HE-LM ceramics. It is expected that the high-entropy rare-earth hexaaluminates will be a promising candidate for TBC. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Thermal barrier coatings

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Structural Difference in the Core-forming Block Reshapes RAFT-mediated Polymerization-induced Self-assembly

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Chinese Journal of Polymer science 2025年第3期43卷 429-438页

作者： Yue-Xi Zhan Li Zhang Chun Feng Jian-Bo Tan Department of Polymeric Materials and Engineering School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter Guangzhou 510006China Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China

Polymerization-induced self-assembly(PISA)has become one of the most versatile approaches for scalable preparation of linear block copolymer nanoparticles with various ***,the controlled introduction of branching into the core-forming block and the effect on the morphologies of block copolymer nanoparticles under PISA conditions have rarely been ***,a series of multifunctional macromolecular chain transfer agents(macro-CTAs)were first synthesized by a two-step green light-activated photoiniferter polymerization using two types of chain transfer monomers(CTMs).These macro-CTAs were then used to mediate reversible addition-fragmentation chain transfer(RAFT)dispersion polymerization of styrene(St)to prepare block copolymers with different core-forming block structures and the *** effect of the core-forming block structure on the morphology of block copolymer nanoparticles was investigated in *** electron microscopy(TEM)analysis indicated that the brush-like core-forming block structure facilitated the formation of higher-order morphologies,while the branched core-forming block structure favored the formation of lower-order ***,it was found that using macroCTAs with a shorter length also promoted the formation of higher-order ***,structures of block copolymers and the assemblies were further controlled by changing the structure of macro-CTA or using a binary mixture of two different *** expect that this work not only sheds light on the synthesis of block copolymer nanoparticles but also provide important mechanistic insights into PISA of nonlinear block copolymers.

关键词： Polymerization-induced self-assembly RAFT polymerization Block copolymer nanoparticles Branched structure

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Phase formation mechanism of Cr2AlC MAX phase coating:In-situ TEM characterization and atomic-scale calculations

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材料科学技术（英文版） 2025年第3期206卷 176-184页

作者： Guanshui Ma Haichen Wu Zhi Fang Xiaohui Zhou Rende Chen Wei Yang Jiayue Zhang Zhenyu Wang Aiying Wang Key Laboratory of Advanced Marine Materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Analytical Center Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Beijing Innovation Centre for Engineering Science and Advanced Technology School of Materials Science and EngineeringPeking UniversityBeijing 100871China

Cr2AlC,a representative MAX phase,gains increasing attention for the excellent oxidation tolerance and corrosion resistance used in harsh high temperature and strong radiation ***,the lack of the phase formation mechanism has become the key bottleneck to the practical applications for Cr2AlC synthesis with high purity at low *** this work,we fabricated the amorphous Cr-Al-C coating by a hybrid magnetron sputtering/cathodic arc deposition technique,in which the in-situ heating transmission electron microscopy(TEM)was conducted in a temperature range of 25-650 ℃ to address the real-time phase transformation for Cr2AlC *** results demonstrated that increas-ing the temperature from 25 to 370 ℃ led to the structural transformation from amorphous Cr-Al-C to the crystalline Cr2Al ***,the high-purity Cr2AlC MAX phase was distinctly formed at 500 ℃,accompanied by the diminished amorphous *** the further increase of temperature to 650 ℃,the decomposition of Cr2AlC to Cr7C3 impurities was *** phase evolution was also evidenced by the Ab-initio molecular dynamics calculations,where the bond energy of Cr-Cr,Cr-Al,and Cr-C played the key role in the formed crystalline stability during the heating *** observa-tions not only provide fundamental insight into the phase formation mechanism for high-purity Cr2AlC coatings but also offer a promising strategy to manipulate the advanced MAX phase materials with high tolerance to high-temperature oxidation and heavy ion radiations.

关键词： Cr2AlC MAX phases In-situ heating transmission electron microscopy Phase formation Bond energy

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Constructing in-situ polymerized electrolyte for room-temperature solid-state chloride ion battery with enhanced electrochemical performance

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材料科学技术（英文版） 2025年第3期206卷 185-192页

作者： Yuling Xu Tiantian Zhu Haiyang Xu Xiangyu Zhao State Key Laboratory of Materials-Oriented Chemical Engineering Jiangsu Collaborative Innovation Center for Advanced Inorganic Functional CompositesCollege of Materials Science and EngineeringNanjing Tech UniversityNanjing211816China

Considering large volume variation and dissolution issues of some promising electrode materials for chloride ion batteries(CIB),the construction of solid polymer electrolytes(SPE)for efficient chloride ion transport is ***,this is hindered by low ionic conductivity of chloride SPEs and poor cycling performance of ***,an in-situ polymerized and cross-linked poly(ethylene gly-col)diacrylate-based chloride SPE with a low plasticizer content of succinonitrile is designed,yielding a room-temperature ionic conductivity of 7.6 × 10-5 S cm-1,which is higher than that of previously re-ported SPEs for ***,the use of the as-prepared SPE achieves an integrated organic cathode with significantly enhanced rate performance and capacity retention of 96.1％after 100 cycles at room temperature,which is much higher than 49.9％(80 cycles)of the cathode in the CIB with a sandwiched *** improved properties are also superior to that of other reported cathodes coupled with different chloride *** chloride ion transfer mechanism of the cathode is revealed by X-ray photo-electron spectroscopy and energy dispersive spectroscopy.

关键词： Chloride ion batteries Polymer electrolytes Poly(ethylene glycol)diacrylate Ionic conductivity Integrated cathode Cycling stability

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Modulation of oxygen vacancies and hot electrons promotes highly efficient CO_(2) photoreduction towards C_(2)H_(6)

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Nano Research 2025年第4期18卷 90-97页

作者： Chengyang Zhu Hengming Huang Huiling Hu Jiaojiao Fang Junjie Mao Key Laboratory of Functional Molecular Solids Ministry of EducationCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241002China College of Materials Science and Engineering State Key Laboratory of Materials-Orient Chemical EngineeringJiangsu Collaborative Innovation Center for Advanced Inorganic Function CompositesJiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing Tech UniversityNanjing 210009China

Efficient CO_(2) photoreduction towards C_(2+)solar fuels has emerged as one of the most promising strategies for alleviating the current energy and environment ***,the C-C coupling barriers and complex multi-electron transfer steps still limit the activity and selectivity of CO_(2)-to-C_(2) ***,Au nanoparticles(NPs)modified CeO_(2) with oxygen vacancies(Au/CeO_(2)-VO)were reported for enhancing the CO_(2)-to-C_(2)H_(6) photoreduction ***/CeO_(2)-VO achieved the high C_(2)H_(6) activity of 51.7μmol·g^(-1)·h^(-1),accompanied with C_(2)H_(6) selectivity up to 80% in the absence of sacrificial *** results combined with theoretical simulation indicated that VO strengthened CO_(2) adsorption and activated*CO production,and plasmon-induced hot electrons from Au NPs to CeO_(2)-VO facilitated the*CO-*CO *** synergistic modulation of VO and hot electrons further decreased the energy barriers of C-C coupling and subsequent hydrogenation,resulting in the superior photoreduction *** work opens an avenue of developing plasmonic photocatalysts for multi-carbon products from CO_(2) photoreduction.

关键词： synergistic modulation oxygen vacancy hot electrons CO_(2)photoreduction C_(2)H_(6)

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Effect of alternative magnetic fields with different intensities on microstructure and mechanical properties of M50 steel during vacuum arc remelting

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Journal of Iron and Steel Research International 2025年第3期32卷 629-645页

作者： Guo-dong Deng Zhi-bin Xia Cheng-kuan Ma Yi-feng Guo Zhong-hao Sun Ming-liang Zhang Qi-zheng Chen Qiang Li Zhe Shen Biao Ding Tian-xiang Zheng Chun-mei Liu Yun-bo Zhong School of Materials Science and Engineering Shanghai UniversityShanghai200444China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai200444China Shanghai Key Laboratory of Advanced Ferrometallurgy Shanghai UniversityShanghai200444China

The use of an alternative magnetic field during vacuum arc remelting(VAR)can have significant effects on the primary carbide and mechanical properties of M50-bearing *** solidification structure and the primary carbide morphology of the VAR ingot were analyzed by optical microscopy and scanning electron *** and analysis of the growth direction of primary carbides were conducted using high-resolution rapid electron backscatter *** elements segregation was analyzed using an electron probe *** was utilized to conduct numerical simulations to validate the experimental findings and elucidate the underlying *** to traditional VAR,magnetic-controlled VAR generates a horizontal circulation,which makes a shallower and flatter molten pool and a more even temperature *** the time dimension,the local solidification time is shortened,and the concentration of solute elements will be *** the spatial dimension,the secondary dendrite arm spacing decreases,alleviating the degree of inter-dendritic ***,the possibility of forming a segregation *** aspects promote the even distribution of solute atoms,resulting in less segregation and hindering the development of primary *** leads to the refinement of primary carbide size and its uniform *** magnetic-controlled vacuum arc melting not only refines the dendritic structure in the M50 ingot,causing it to expand more axially along the ingot,but also refines primary carbides and improves tensile and wear-resistant mechanical properties.

关键词： Primary carbide Microstructure Magnetic-controlled vacuum arc remelting M50-bearing steel Alternative magnetic field

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