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Polymer-/Ceramic-based Dielectric composites for Energy Storage and Conversion

Energy & Environmental Materials 2022年第2期5卷 486-514页

作者： Honghui Wu Fangping Zhuo Huimin Qiao Lalitha Kodumudi Venkataraman Mupeng Zheng Shuize Wang He Huang Bo Li Xinping Mao Qiaobao Zhang Beijing Advanced Innovation Center for Materials Genome Engineering Collaborative Innovation Center of Steel TechnologyUniversity of Science and Technology BeijingBeijing 100083China Department of Materials and Earth Sciences Technical University of DarmstadtDarmstadt 64287Germany School of Advanced Materials and Engineering Sungkyunkwan University(SKKU)Suwon 16419Korea Key Laboratory of Advanced Functional Materials Ministry of EducationFaculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Department of Materials Science and Engineering College of MaterialsXiamen UniversityXiamen 361005China

Dielectric composites boost the family of energy storage and conversion materials as they can take full advantage of both the matrix and *** review aims at summarizing the recent progress in developing highperformance polymer-and ceramic-based dielectric composites,and emphases are placed on capacitive energy storage and harvesting,solid-state cooling,temperature stability,electromechanical energy interconversion,and high-power *** fabrication techniques of dielectric composites such as 3D printing,electrospinning,and cold sintering are addressed,following by highlighted challenges and future research *** advantages and limitations of the typical theoretical calculation methods,such as finite-element,phase-field model,and machine learning methods,for designing high-performance dielectric composites are *** review is concluded by providing a brief perspective on the future development of composite dielectrics toward energy and electronic devices.

关键词： composite dielectric energy storage and conversion ferroelectric

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FRET endows rare earth Eu(Ⅲ) complex with stable ultra-dissymmetry and narrowband circularly polarized luminescence

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science China Materials 2025年第3期68卷 879-887页

作者： Yiran Ren Zhi Chen Honglong Hu Zixuan Zhang Bo Yang Zhigang Zheng Zhen-Qiang Yu Xiaopeng Li Wei-Hong Zhu Yue Wu College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518071China Shanghai Key Laboratory of Functional Materials Chemistry Key Laboratory for Advanced Materials and Institute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China School of Physics East China University of Science and TechnologyShanghai 200237China

Narrowband circularly polarized luminescence(CPL)is a crucial parameter for high color purity display but rarely ***,it is rather challenging and significant to provide a route towards high-dissymmetry CPL with both persistent chiroptical stability and narrowband *** possessing a very narrowband emission and excitation from the unique f-f transition of electrons,the chiral rare earth complexes often racemize with the low inversion barrier,resulting in an undesirable decrease of CPL ***,we report a circularly polarized Foster resonance energy transfer(C-FRET)in a liquid crystal(LC)coassembly that contains axially chiral alkoxy binaphthyl(R/S-BN)as donor and narrowband emission-featured rare earth Eu(Ⅲ)complex(EuOL)as *** highly ordered helical superstructures enable achiral EuOL to emit ultra-dissymmetric CPL,accompanying with a high dissymmetry factor up to 1.44 from LC microcavity *** EuOL@R/S-BN exhibits extremely CPL narrowband with full width at half maximum of 10.8 *** with the direct excitation,the specific C-FRET strategy in LC coassembly can indirectly emit the highly dissymmetric and narrowband CPL,and completely overcome the CPL weakness from the essential chiral racemization of rare earth Eu(Ⅲ)*** LC C-FRET strategy can guarantee the chiroptical stability,high dissymmetry and narrowband emission,which is anticipated to put forward a new route toward the further utilization of rare earth and advanced display technology.

关键词： circularly polarized luminescence FRET liquid crystal narrowband rare earth luminescence

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Strong correlation between ionic bonding strength and superconductivity in compressed hydrides

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Physical Review Materials 2024年第8期8卷 084805-084805页

作者： Xing Li Zixuan Guo Yansun Yao Xiaohua Zhang Shicong Ding Guochun Yang State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province School of Science Department of Physics and Engineering Physics Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of

Understanding the superconductivity in relation to chemical bonding is essential for the development of superconductors. We propose that pressure-reduced ionic bonding strength is beneficial for improving superconductivity in hydrides (negative correlation between bonding strength and critical temperature). We model ionic hydrides using a prototypical ionic lattice (CsCl-type) with simple-valence metal Li/Rb and hydrogen and control the bonding strength via external pressure. First-principles calculations reveal that the ionic bonding strength in LiH increases with pressure while its critical temperature (Tc) simultaneously decreases. A higher Tc at lower pressures is attributed to stronger electron-phonon coupling (EPC) induced by weaker ionic bonds and significant EPC contributions from mid-frequency phonons. RbH's pressure dependences of bonding strength and Tc are the reverse of those of LiH, and the EPC primarily results from high-frequency phonons. The distinct interorbital electron transition mechanism and amounts of charge transfer are responsible for the opposite trend of changes in bonding strength and superconductivity in LiH and RbH. The proposed correlation is further validated by the other six ionic hydrides. Substantial Tc change (e.g., 126.2 K at 100 GPa and 5.7 K at 300 GPa in LiH) in response to bonding strength variation reveals a key factor for designing new superconductors.

关键词： Electronic structure First-principles calculations High-pressure studies Superconductivity

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Electromagnetic Functions Modulation of Recycled By-Products by Heterodimensional Structure

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Nano-Micro Letters 2025年第6期17卷 264-278页

作者： Ze Nan Wei Wei Zhenhua Lin Ruimei Yuan Miao Zhang Jincheng Zhang Jianyong Ouyang Jingjing Chang Hejun Li Yue Hao State Key Laboratory of Wide-Bandgap Semiconductor Devices and Integrated Technology School of MicroelectronicsXidian UniversityXi’an 710071People’s Republic of China State Key Laboratory of Solidification Processing Shaanxi Province Key Laboratory of Fiber Reinforced Light Composite MaterialsCarbon/Carbon Composites Research CenterNorthwestern Polytechnical UniversityXi’an 710072People’s Republic of China Advanced Interdisciplinary Research Center for Flexible Electronics Xidian UniversityXi’an 710071People’s Republic of China Department of Materials Science and Engineering National University of Singapore7 Engineering Drive 1Singapore 117574Singapore

One of the significant technological challenges in safeguarding electronic devices pertains to the modulation of electromagnetic(EM)wave jamming and the recycling of defensive *** synergistic effect of heterodimensional materials can effectively enable the manipulation of EM waves by altering the *** we propose a novel approach for upcycling by-products of silver nanowires that can fabricate shape-tunable aerogels which enable the modulation of its interaction with microwaves by heterodimensional structure of ***-product heterodimensionality was used to design EM-wave-jamming-dissipation structures and therefore two typical tunable aerogel forms were *** first tunable form was aerogel film,which shielded EM interference(EMI shielding effectiveness(EMI SE)>89 dB)and the second tunable form was foam,which performed dual EM functions(SE>30 dB&reflective loss(RL)<-35 dB,effective absorption bandwidth(EAB)>6.7 GHz).We show that secondary recycled aerogels retain nearly all of their EM protection properties,making this type of closed-loop cycle an appealing *** findings pave the way for the development of adaptive EM functions with nanoscale regulation in a green and closed-loop cycle,and they shed light on the fundamental understanding of microwave interactions with heterodimensional structures.

关键词： Silver nanowires Electromagnetic shielding Microwave absorption Recycled aerogels

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Low Trap Density Para-F Substituted 2D PEA_(2)PbI_(4)(X=Cl,Br,I)Single Crystals with Tunable Optoelectrical Properties and High Sensitive X-Ray Detector Performance

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Research 2023年第1期2022卷 273-283页

作者： Jiayu Di Haojin Li Li Chen Siyu Zhang Yinhui Hu Kai Sun Bo Peng Jie Su Xue Zhao Yuqi Fan Zhenhua Lin Yue Hao Peng Gao Kui Zhao Jingjing Chang State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology School of MicroelectronicsXidian University710071 XianChina Advanced Interdisciplinary Research Center for Flexible Electronics Academy of Advanced Interdisciplinary ResearchXidian University710071 Xi'anChina Key Laboratory of Applied Surface and Collid Chemistry National Ministry of EducationSchool of Materials Science and EngineeringShaanxi Normal University710119 Xi'anChina CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

Exploring halogen engineering is of great significance for reducing the density of defect states in crystals of organic-inorganic hybrid perovskites and hence improving the crystal ***,high-quality single crystals of PEA_(2)PbI_(4)(X=CI,Br,I)and their para-F(p-F)substitution analogs are prepared using the facile solution method to study the effects of both p-F substitution and halogen anion *** p-F substitution,the triclinic PEA_(2)PbX_(4)(X=Cl,Br)and cubic PEA_(2)PbX_(4)(X=I)crystals unifies to monoclinic crystal structure for p-F-PEA_(2)PbX_(4)(X=Cl,Br,I)*** p-F substitution and halogen engineering,together with crystal structure variation,enable the tunability of optoelectrical ***,after the p-F substitution,the energy levels are lowered with increased Fermi levels,and the bandgaps of p-F-PEA_(2)PbX_(4)(X=Cl,Br,I)are slightly *** from the enhancement of the charge transfer and the reduced trap density by p-F substitution and halogen anion engineering,the average carrier lifetime of the p-F-PEA_(2)PbI_(4)is obviously *** with PEA_(2)PbI_(4)the X-ray detector based on p-F-PEA_(2)PbI_(4)single crystals exhibits higher radiation stability under high-dose X-ray irradiation,implying long-term operando stability.

关键词： properties stability substitution

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Ordered Mesoporous Magnetic Ceramics from Single-Source Self-Assembled Ferrocene-functionalized Giant Molecules

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CCS Chemistry 2025年第2期7卷 460-469页

作者： Qing-Yun Guo Xing-Han Li Yuean Wu Xiao-Yun Yan Yuchu Liu Di Han Bo-xing Zhang Xian-You Liu Huanyu Lei Zebin Su Jiahao Huang Wei Zhang GengXin Liu Hao Liu Xueyan Feng Stephen Z.D.Cheng South China Advanced Institute of Soft Matter Science and Technology School of Emergent Soft MatterSouth China University of TechnologyGuangzhou 510640 Department of Polymer Science School of Polymer Science and Polymer EngineeringThe University of AkronAkronOhio 44325-3909 Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices Guangdong Basic Research Center of Excellence for Energy and Information Polymer MaterialsSouth China University of TechnologyGuangzhou 510640 College of Polymer Science and Engineering State Key Laboratory of Polymer Materials and EngineeringSichuan UniversityChengdu 610065 Department of Pharmaceutical Science School of PharmacyUniversity of PittsburghPittsburghPennsyl-vania 15261 State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Center for Advanced Low-dimensional MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620 State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200438

Ordered mesoporous materials have demonstrated con-siderable potential in various fields,such as catalysis,separation,and biomedical *** such materials has garnered extensive ***-ever,current investigations of mesoporous materials predominantly focus on high porosity and related appli-cations,often neglecting the development of mesopor-ous materials possessing additional ***,we report the fabrication of ordered mesoporous magnetic ceramics by pyrolyzing single-source self-assembled giant molecules,constructed by dihydroxyl-functiona-lized polyhedral oligomeric silsequioxane,polystyrene,and *** ordered magnetic ceramics with high surface areas and uniform pore sizes were obtained after the *** measure-ments revealed the ferromagnetic nature of the ceramic *** magnetic ceramic monoliths and magnetic ceramic thin films can be fabricated by pro-cessing the precursor giant ***,the mesoporous magnetic ceramics exhibit exceptional adsorption capacity and facile separability,making them suitable for water pollutant removal applications.

关键词： mesoporous materials self-assembly giant molecules polyhedral oligomeric silsequioxane ferrocene

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High strength mullite-bond SiC porous ceramics fabricated by digital light processing

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Journal of advanced Ceramics 2024年第1期13卷 53-62页

作者： Jian Sun Jingde Zhang Xu Zhang Zihe Li Jianzhang Li Sijie Wei Weibin Zhang Weili Wang Guifang Han Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061China Key Laboratory of Special Functional Aggregated Materials Ministry of EducationShandong UniversityJinan 250100China Materials and Structures Research Centre Department of Mechanical EngineeringUniversity of BathBath BA27AYUK National Engineering Research Centre of Ceramic Matrix Composite Manufacture Technology Xi’an Golden Mountain Ceramic Composites Co.Ltd.Xi’an 710118China School of Physics and Materials Science Changji UniversityChangji 831100China

Fabricating SiC ceramics via the digital light processing(DLP)technology is of great challenge due to strong light absorption and high refractive index of deep-colored SiC powders,which highly differ from those of resin,and thus significantly affect the curing performance of the photosensitive SiC *** this paper,a thin silicon oxide(SiO_(2))layer was in-situ formed on the surface of SiC powders by pre-oxidation *** method was proven to effectively improve the curing ability of SiC *** SiC photosensitive slurry was fabricated with solid content of 55 vol%and viscosity of 7.77 Pa·s(shear rate of 30 s^(−1)).The curing thickness was 50μm with exposure time of only 5 ***,a well-designed sintering additive was added to completely convert low-strength SiO_(2) into mullite reinforcement during *** mullite-bond SiC ceramics were successfully *** flexural strength of SiC ceramics sintered at 1550℃in air reached 97.6 MPa with porosity of 39.2 vol%,as high as those prepared by spark plasma sintering(SPS)techniques.

关键词： digital light processing(DLP) SiC ceramics pre-oxidation mullite-bond SiC mechanical properties

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Grain Boundary Engineering in Nickel-Rich Cathode: A Combination of High-Throughput First-Principle and Interpretable Machine Learning Study

SSRN

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SSRN 2024年

作者： Hu, Yixuan Zhang, Yumeng Wen, Bo Dai, Fu-Zhi Shanghai200240 China Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials & Processing Technology Beijing100076 China School of Materials Science and Engineering University of Science and Technology Beijing Beijing100083 China AI for Science Institute Beijing100084 China

One of the primary challenges in commercializing nickel (Ni)-rich layered cathodes for lithium-ion batteries (LIBs) is addressing the problem of crack formation during cell cycling. These cracks quickly spread along grain boundaries (GBs), causing capacity and voltage degradation. GB engineering, a classical technique for strengthening materials that has been largely unexplored in LIBs, could potentially inhibit intergranular fractures and significantly extend battery life. In this study, we employed a synergistic approach that combined high-throughput first-principles calculations and an interpretable machine learning (ML) framework to assess the feasibility of enhancing GBs through segregation-induced strengthening via doping. As a result, we generated a comprehensive database containing 256 doped GBs across 64 elements, representing the largest database for first-principles-aided GB engineering in LIBs to date. This database further enabled the implementation of an interpretable ML workflow to uncover the fundamental principles governing dopant segregation and GB strengthening. Based on the insights gained from this research, we provide practical and promising recommendations for dopant elements that can effectively anchor and reinforce GBs, such as Mg, Al, Si, Ti, Cr, Mn, Fe, Cu, Zn, Hf, and Ce, with some already demonstrating success in experiments. This work on GB engineering serves as a foundation for the development of advanced, doped cathode materials for next-generation batteries. © 2024, The Authors. All rights reserved.

关键词： Grain boundaries

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Integrating molybdenum sulfide selenide-based cathode with C-O-Mo heterointerface design and atomic engineering for superior aqueous Zn-ion batteries

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Nano Research 2023年第4期16卷 4933-4940页

作者： Hong Li Biao Chen Runhua Gao Fugui Xu Xinzhu Wen Xiongwei Zhong Chuang Li Zhihong Piao Nantao Hu Xiao Xiao Feng Shao Guangmin Zhou Jinlong Yang Guangdong Research Center for Interfacial Engineering of Functional Materials College of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China Tsinghua-Berkeley Shenzhen Institute&Tsinghua Shenzhen International Graduate School Tsinghua UniversityShenzhen 518055China Key Laboratory for Thin Film and Microfabrication Technology of the Ministry of Education School of ElectronicsInformation and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials Tianjin UniversityTianjin 300350China School of Chemistry and Chemical Engineering Shanghai Key Laboratory of Electrical Insulation and Thermal AgeingShanghai Jiao Tong UniversityShanghai 200240China School of Engineering and Technology College Yang-en UniversityQuanzhou 362014China

Transition metal dichalcogenides(TMDs)have been regarded as promising cathodes for aqueous zinc-ion batteries(AZIBs)but suffer from sluggish reaction kinetics due to their poor conductivity and the strong electrostatic interaction between Zn-ion and cathode ***,a well-defined structure with MoSSe nanosheets vertically anchored on graphene is used as the cathode for *** dissolution of Se into MoS2 lattice together with heterointerface design via developing C-O-Mo bonds improves the inherent conductivity,enlarges interlayer spacing,and generates abundant anionic *** a result,the Zn2+intercalation/deintercalation process is greatly improved,which is confirmed by theoretical modeling and ex-situ experimental ***,the assembled AZIBs exhibit high-rate capability(124.2 mAh·g^(−1)at 5 A·g^(−1))and long cycling life(83%capacity retention after 1,200 cycles at 2 A·g^(−1)).Moreover,the assembled quasi-solid-state Zn-ion batteries demonstrate a stable cycling performance over 100 cycles and high capacity retention over 94%after 2,500 bending *** study provides a new strategy to unlock the electrochemical activity of TMDs via interface design and atomic engineering,which can also be applied to other TMDs for multivalent batteries.

关键词： Zn2+kinetics heterointerface design atomic engineering anion vacancy

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A clustering adaptive Gaussian process regression method: response patterns based real-time prediction for nonlinear solid mechanics problems

arXiv

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arXiv 2024年

作者： Li, Ming-Jian Lian, Yanping Cheng, Zhanshan Li, Lehui Wang, Zhidong Gao, Ruxin Fang, Daining Institute of Advanced Structure Technology Beijing Institute of Technology Beijing100081 China Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures Beijing100081 China

Numerical simulation is a powerful approach to study nonlinear solid mechanics problems. However, mesh-based or particle-based numerical methods suffer from the common shortcoming of being time-consuming, particularly for complex problems with real-time analysis requirements. This study presents a clustering adaptive Gaussian process regression (CAG) method aiming for real-time prediction for nonlinear structural responses in solid mechanics. It is a data-driven machine learning method featuring a small sample size, high accuracy, and high efficiency, leveraging nonlinear structural response patterns. Similar to the traditional Gaussian process regression (GPR) method, it operates in offline and online stages. In the offline stage, an adaptive sample generation technique is introduced to cluster datasets into distinct patterns for demand-driven sample allocation. This ensures comprehensive coverage of the critical samples for the solution space of interest. In the online stage, following the divide-and-conquer strategy, a pre-prediction classification categorizes problems into predefined patterns sequentially predicted by the trained multi-pattern Gaussian process regressor. In addition, dimension reduction and restoration techniques are employed in the proposed method to enhance its efficiency. A set of problems involving material, geometric, and boundary condition nonlinearities is presented to demonstrate the CAG method’s predictive abilities. The proposed method can offer predictions within a second and attain high precision with only about 20 samples within the context of this study, outperforming the traditional GPR using uniformly distributed samples for error reductions ranging from 1 to 3 orders of magnitude. The CAG method is expected to offer a powerful tool for real-time prediction of nonlinear solid mechanical problems and shed light on the complex nonlinear structural response pattern. Copyright © 2024, The Authors. All rights reserved.

关键词： Gaussian distribution

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