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Simultaneous achievement of large electrocaloric effect and ultrawide operating temperature range in BaTiO_(3)-based lead-free ceramic

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Journal of advanced Ceramics 2024年第8期13卷 1234-1241页

作者： Zhaojie Wang Yingzhi Meng Silin Tang Xiang Niu Hongfang Zhang Dingyuan Wang Yisong Bai Bialin Peng Xue Chen Qingqing Ke Sheng-Guo Lu Laijun Liu Guangxi Key Lab of Optical and Electronic Functional Materials and Devices Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of ResourcesCollege of Materials Science and EngineeringGuilin University of TechnologyGuilin 541004China School of Microelectronics Science and Technology Sun Yat-sen UniversityZhuhai 519082China Guangdong Provincial Research Center on Smart Materials and Energy Conversion Devices School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China School of Physical Science and Technology&Key Laboratory of Advanced Electrode Materials for Novel Solar Cells for Petroleum and Chemical Industry of China Suzhou University of Science and TechnologySuzhou 215009China Qingdao Haier Smart Technology R&D Co. Ltd.Qingdao 266100China School of Advanced Materials and Nanotechnology Xidian UniversityXi'an 710071China Guangxi Key Laboratory of Manufacturing System&Advanced Manufacturing Technology Guilin University of Electronic TechnologyGuilin 541004China

The electrocaloric effect(ECE),known for its environmentally friendly characteristics,holds significant promise for advancing next-generation solid-state refrigeration *** a large ECE along with a wide working temperature range near room temperature remains a key developmental *** this study,we successfully obtained a substantial ECE of 1.78 K and an extensive working temperature range of 103 K(AT>1.52 K)near room temperature in CaZrO_(3)-modified BaTiO_(3) lead-free ferroelectric ***,this achievement was verified using direct *** piezoresponse force microscopy(PFM)results suggest that the broad temperature range is attributed to the formation of ferroelectric microdomains and polar nanoregions(PNRs).Furthermore,X-ray photoelectron spectroscopy(XPS)and ultraviolet-visible(UV-Vis)spectroscopy reveal a decrease in the oxygen vacancy concentration and an increase in the bandgap for higher CaZrO_(3) doping *** changes synergistically enhance the maximum applied electric field,helping to achieve a high-performance EcE near room *** research presents a straightforward and effective approach for achieving high-performance ECEs in BaTiOg lead-free ceramics,offering promising prospects for application in next-generation solid-state refrigeration technologies.

关键词： BaTiO_(3) electrocaloric effect oxygen vacancy band-gap

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Modulation of the octahedral structure and potential superconductivity of La_(3)Ni_(2)O_(7)through strain engineering

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science China(Physics,Mechanics & Astronomy) 2025年第3期68卷 145-152页

作者： Zihao Huo Zhihui Luo Peng Zhang Aiqin Yang Zhengtao Liu Xiangru Tao Zihan Zhang Shumin Guo Qiwen Jiang Wenxuan Chen Dao-Xin Yao Defang Duan Tian Cui Key Laboratory of Material Simulation Methods&Software of Ministry of Education State Key Laboratory of Superhard MaterialsCollege of PhysicsJilin UniversityChangchun130012China Center for Neutron Science and Technology Guangdong Provincial Key Laboratory of Magnetoelectric Physics and DevicesState Key Laboratory of Optoelectronic Materials and TechnologiesSchool of PhysicsSun Yat-sen UniversityGuangzhou510275China MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Advanced Functional Materials and Mesoscopic PhysicsSchool of PhysicsXi’an Jiaotong UniversityXi’an710049China Institute of High Pressure Physics School of Physical Science and TechnologyNingbo UniversityNingbo315211China

The recent transport measurements of La_(3)Ni_(2)O_(7)uncovered a“right-triangle”shape of the superconducting dome in the pressure-temperature(P-T)phase *** by this,we perform theoretical first-principles studies of La_(3)Ni_(2)O_(7)with the pressure ranging from 0 to 100 ***,we reveal a pressure dependence of the Ni-d_(z^(2))electron density at the Fermi energy(n_(z)^(E_(F)))that highly coincides with such *** this basis,we further explore the electronic structure under uniaxial *** tracking the stress response of n_(z)^(E_(F)),we propose that superconductivity can be achieved by applying only ~2GPa of compression along the c *** idea is further exemplified from the perspectives of lattice distortion,band structure,Fermi surface and superconducting phase *** also discuss the possible charge modulation under the stress and provide an insight into the relation between nz E Fand the superconducting T_(c)in La_(3)Ni_(2)O_(7)*** study provides new routes to the search of high-T_(c)superconductors in future experiments.

关键词： nickelate superconductors density functional theory strong correlated systems strain engineering

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Application of high-throughput first-principles calculations in ceramic innovation

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Journal of Materials science & technology 2021年第29期88卷 143-157页

作者： Bin Liu Juanli Zhao Yuchen Liu Jianqi Xi Qian Li Huimin Xiang Yanchun Zhou School of Materials Science and Engineering Shanghai UniversityShanghai200444China Department of Materials Science and Engineering University of WisconsinMadisonWI53706USA Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Material&Processing TechnologyBeijing100076China

Recent technical progress in the industry has led to an urgent requirement on new materials with enhanced *** meet this multi-property requirement,the materials consisting of three and more elements have attracted increasing ***,facing to the nearly unknown huge multi-component materials system,the traditional trial and error method cannot provide sufficient data ***,an efficient material innovation strategy is *** first-principles calculation based on the density functional theory is a powerful tool for both the accurate prediction of material properties and the identification of its underlying thermodynamics and *** the same time,the advances of computational methods and computer calculation abilities that are orders of magnitude faster than before make the high throughput first-principles calculations *** present,the simulation-assisted material design has become a main branch in the material research field and a great many successes have been *** this article,the advances of the high throughput first-principles calculations are reviewed to show the achievements of the first-principles calculations and guide the future directions of its applications in ceramics.

关键词： First-principles calculations Ceramics Defect Dynamics Structure-property relationship

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Cs-Induced Phase Transformation of Vanadium Oxide for High-Performance Zinc-Ion Batteries

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Energy & Environmental Materials 2023年第4期6卷 265-272页

作者： Gan Qu Kai Guo Weijie Chen Yu Du Ye Wang Bingbing Tian Jianan Zhang Key Laboratory of Advanced Energy Catalytic and Functional Materials Preparation of Zhengzhou City College of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China

Rechargeable aqueous zinc-ion batteries are promising candidate for gridscale energy ***,the development of zinc-ion batteries has been plagued by the lack of cathode materials with high specific capacity and superior ***,hexagonal Cs_(0.3)V_(2)O_(5)cathode is fabricated and investigated in zinc-ion *** with the traditional vanadium oxides,the introduction of Cs changes the periodic atomic arrangements,which not only stabilizes the open framework structure but also facilitates the Zn^(2+)diffusion with a lower migration energy ***,high specific capacity of 543.8 mA h g^(-1)at 0.1 A g^(-1)is achieved,which surpasses most of reported cathode materials in zinc-ion *** excellent cycle life is achieved over 1000 cycles with about 87.8%capacity retention at 2 A g^(-1).Furthermore,the morphological evolution and energy storage mechanisms are also revealed via a series of *** work opens up a phase engineering strategy to fabricate the hexagonal vanadium oxide and elucidate the application of phase-dependent cathodes in zinc-ion batteries.

关键词： cathode materials phase engineering vanadium oxide zinc-ion batteries

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Chitosan Nanoparticles Encapsulate Antimicrobial Peptides for the Prevention and Control of Citrus reticulata Huanglongbing and Their Distribution in Plants

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Journal of Agricultural and Food Chemistry 2025年第22期73卷 13295-13312页

作者： Zhou, Yue Li, Xue Guo, Zetian Wang, Xizi Tai, Yanlong Chen, Wenli MOE Key Laboratory of Laser Life Science Institute of Laser Life Science Guangdong Provincial Key Laboratory of Laser Life Science Guangzhou Key Laboratory of Spectral Analysis and Functional Probes College of Biophotonics School of Optoelectronic Science and Engineering South China Normal University Guangzhou 510631 China Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China

Huanglongbing (HLB), caused by Candidatus Liberibacter asiaticus (CLas), is a serious bacterial disease affecting citrus. This study found that the expression of long stable antimicrobial peptide (LSAMP) increases with citrus immune genes CsPR1, CsPR2, and CsNPR1, indicating a link to citrus immunity. Additionally, cut antimicrobial peptide (CAMP) functions similarly to stable antimicrobial peptide (SAMP) in inhibiting CLas proliferation and boosting immunity in periwinkle (Catharanthus roseus). Chitosan nanoparticles (CS-NPs) were synthesized to encapsulate CAMP (CAMP-NPs) and SAMP (SAMP-NPs), which improved their stability and bioavailability. Both CAMP-NPs and SAMP-NPs outperformed their unencapsulated forms in inhibiting CLas proliferation and enhancing immunity in HLB-infected periwinkle and citrus;they also enhance citrus photosynthesis. Confocal microscopy revealed that CS-NPs mainly localized in the leaf apoplast but also penetrated chloroplasts. This study offers a novel biological control strategy for HLB and provides a practical framework for utilizing CS-NPs loaded with antimicrobial peptides (AMPs) for plant disease resistance. © 2025 American Chemical Society.

关键词： chitosan nanoparticles citrus huanglongbing cut antimicrobial peptides

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Cobalt-Free BaFe_(0.6)Zr_(0.1)Y_(0.3)O_(3−δ)Oxygen Electrode for Reversible Protonic Ceramic Electrochemical Cells

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Transactions of Tianjin University 2023年第6期29卷 444-452页

作者： Chenghao Yang Jin Li Ao Hu Jian Pu Bo Chi State Key Laboratory of Materials Processing and Die and Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials MOE Key Laboratory for the Green Preparation and Application of Functional MaterialsFaculty of Materials Science and EngineeringHubei UniversityWuhan 430062China MOE Key Laboratory of Material Chemistry for Energy Conversion and Storage Huazhong University of Science and TechnologyWuhan 430074China

Reversible protonic ceramic electrochemical cells(R-PCECs)are ideal,high-effi ciency devices that are environmentally friendly and have a modular *** paper studies BaFe_(0.6)Zr_(0.1)Y_(0.3)O_(3−δ)(BFZY3)as a cobalt-free perovskite oxygen electrode for high-performance R-PCECs where Y ions doping can increase the concentration of oxygen vacancies with a remarkable increase in catalytic *** cell with confi guration of Ni-BZCYYb/BZCYYb/BFZY3 demonstrated promising performance in dual modes of fuel cells(FCs)and electrolysis cells(ECs)at 650℃with low polarization resistance of 0.13Ωcm^(2),peak power density of 546.59 mW/cm^(2)in FC mode,and current density of−1.03 A/cm^(2)at 1.3 V in EC *** alternative operation between FC and EC modes for up to eight cycles with a total of 80 h suggests that the cell with BFZY3 is exceptionally stable and reversible over the long *** results indicated that BFZY3 has considerable potential as an air electrode material for R-PCECs,permitting effi cient oxygen reduction and water splitting.

关键词： Protonic ceramic cells Oxygen electrode Perovskite oxides Cobalt-free Oxygen vacancies

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Intrinsic persistent room temperature phosphorescence derived from 1H-benzo[f]indole itself as a guest

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Chinese Chemical Letters 2023年第7期34卷 449-453页

作者： Danman Guo Yuyuan Wang Jinzheng Chen Yifeng Cao Yiling Miao Huahua Huang Zhenguo Chi Zhiyong Yang Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education Guangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional FilmsSchool of ChemistrySun Yat-sen UniversityGuangzhou 510275China School of Materials Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China Guangdong Provincial Key Laboratory of Optical Chemicals XinHuaYue GroupMaoming 525000China

The influence of 1H-benzo[f]indole(Bd) and its derivatives on room temperature phosphorescence(RTP)has raised great concern since they were found to significantly affect RTP of the extensively studied carbazole(Cz) derivatives. However, the role of Bd itself existing in Cz-based or other doping systems was still unclear. In order to clarify its intrinsic phosphorescent property, Bd was introduced as a guest into different organic matrixes including substituted Cz derivatives and polymers. The phosphorescence located in 560–620 nm was confirmed to be derived from Bd itself, which can be detected whatever Bd was doped in the crystal or amorphous state of Cz derivatives. The suitable energy gap between Cz derivatives and Bd is the key to achieve ultralong RTP of Bd. Additionally, when doped in polymers with plenty of hydrogen bonds, RTP of Bd with lifetime over 280 ms was easily obtained. Among them, Bd@PHEMA(poly(hydroxyethyl methacrylate) exhibited superior phosphorescence, with yellow afterglow lasting for over 2.5 s. Therefore, this work demonstrated that a new organic RTP phosphor, Bd, is discovered, and ultralong RTP of Bd can be achieved not only doped in Cz derivatives but also in polymers as the hosts.

关键词： Room temperature phosphorescence Host-guest 1H-benzo[f]indole Amorphous Hydrogen bonding

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3D vertically aligned microchannel structure to enhance piezoelectric energy harvesting performance of PZT/PVDF&CNTs piezoelectric composites

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Journal of Materiomics 2024年第5期10卷 1063-1070页

作者： Limin Hou Yu Huan Mupeng Zheng Yilong Liu Chuilei Wang Xinjian Wang Changxiao Li Zhenxing Wang Tao Wei School of Materials Science and Engineering University of JinanJinan250022China Key Laboratory of Advanced Functional Materials Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing100124China Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education and International Center for Dielectric ResearchXi'an Jiaotong UniversityXi'an710049China SICC Co. LtdJinan250000China

Piezoelectric energy harvesters(PEHs)have attracted significant attention with the ability of converting mechanical energy into electrical energy and power the self-powered microelectronic ***,material's superior energy harvesting performance is closely related to its high transduction coefficient(d_(33)×g_(33)),which is dependent on higher piezoelectric coefficient d33 and lower dielectric constantεr of ***,the high d33 and lowεr are difficult to be simultaneously achieved in piezoelectric ***,lead zirconate titanate(PZT)based piezoelectric composites with vertically aligned microchannel structure are constructed by phase-inversion *** polyvinylidene fluoride(PVDF)and carbon nanotubes(CNTs)are mixed as fillers to fabricate PZT/PVDF&CNTs *** unique structure and uniformly distributed CNTs network enhance the polarization and thus improve the *** PVDF filler effectively reduce theε*** a consequence,the excellent piezoelectric coefficient(d_(33)=595 pC/N)and relatively low dielectric constant(ε_(r)=1,603)were obtained in PZT/PVDF&CNTs composites,which generated an ultra-high d_(33)×g_(33) of 24,942×10^(−15) m^(2)/***,the PZT/PVDF&CNTs piezoelectric composites achieve excellent energy harvesting performance(output voltage:66 V,short current:39.22μA,and power density:1.25μW/mm^(2)).Our strategy effectively boosts the performance of piezoelectric-polymer composites,which has certain guiding significance for design of energy harvesters.

关键词： Piezoelectric-polymer composites Phase-inversion method 3D vertically aligned microchannel structure Piezoelectric energy harvester Carbon nanotubes

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Bimetal nanoparticles hybridized with carbon nanotube boosting bifunctional oxygen electrocatalytic performance

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Rare Metals 2022年第8期41卷 2616-2623页

作者： Chen Sun Yong-Jie Zhao Xuan-Yi Yuan Jing-Bo Li Hai-Bo Jin Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing100081China Beijing Key Laboratory of Opto-Electronic Functional Materials&Micro-Nano Devices Department of PhysicsRenmin University of ChinaBeijing100872China

Developing bifunctional oxygen catalysts with high efficiency and low cost to replace platinum-group metal catalysts commonly utilized in metal-air batteries is critically *** this article,a convenient method to synthesis NiFe nanoparticles hybridized with N-doped carbon nanotube(NiFe@N-CNTs)is *** performance analysis indicates that Ni_(x)Fc_(1-x)@N-CNTs offers favorable oxygen reduction reaction(ORR)kinetics(onset potential(E_(onset))is 0.87 V and half-wave potential(E_(1/2))is0.84 V),together with excellent oxygen evolution reaction(OER)performance(an overpotential of 270 mV to drive10 mA·cm^(-2)).Contributed by the synergetic effect between NiFe alloy and N-CNTs,when being utilized as air cathode,rechargeable Zn-air batteries present superior cycling stability for over 150 *** research provides a universal strategy to synthesize the hybrids of intertwined carbon nanotube matrix loaded with alloy nanoparticles.

关键词： NiFe alloy Oxygen evolution reaction(OER) Oxygen reduction reaction(ORR) Zn-air batteries

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Interaction of multicomponent disilicate(Yb_(0.2)Y_(0.2)Lu_(0.2)Sc_(0.2)Gd_(0.2))_(2)Si_(2)O_(7)with molten calcia-magnesia-aluminosilicate

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Journal of advanced Ceramics 2022年第1期11卷 66-74页

作者： Yu DONG Ke REN Qiankun WANG Gang SHAO Yiguang WANG Science and Technology on Thermostructural Composite Materials Laboratory Northwestern Polytechnical UniversityXi’an 710072China Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China Henan Province Industrial Technology Research Institute of Resources and Materials Zhengzhou UniversityZhengzhou 450001China

Environmental barrier coating(EBC)materials that are resistant against molten calcia-magnesia-aluminosilicate(CMAS)corrosion are urgently ***,multicomponent rare-earth(RE)disilicate((Yb_(0.2)Y_(0.2)Lu_(0.2)Sc_(0.2)Gd_(0.2))_(2)Si_(2)O_(7),(5RE)_(2)Si_(2)O_(7))was investigated with regard to its CMAS interaction behavior at 1400°*** with the individual RE disilicates,the(5RE)2Si2C>7 material exhibited improved resistance against CMAS *** dominant process involved in the interaction of(5RE)_(2)Si_(2)O_(7)with CMAS was reaction-recrystallization.A dense and continuous reaction layer protected the substrate from rapid corrosion at high *** results demonstrated that multicomponent strategy of RE species in disilicate can provide a new perspective in the development of promising EBC materials with improved corrosion resistance.

关键词： environmental barrier coating(EBC)materials rare-earth(RE)disilicates multicomponent ceramics calcia-magnesia-aluminosilicate(CMAS)interaction

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