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Construction and Regulation of a Perovskite-Type Sulfur Reduction Catalyst Based on Oxygen Vacancy engineering for Advanced Lithium-Sulfur Batteries

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SSRN 2024年

作者： Huang, Xuelin Zeng, Peng Lu, Yunfeng Yang, Juan Chen, Manfang Liu, Hong Wang, Xianyou National Base for International Science & Technology Cooperation National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery Hunan Province Key Laboratory of Electrochemical Energy Storage & Conversion School of Chemistry Xiangtan University Xiangtan411105 China Key Laboratory for Theoretical Organic Chemistry and Functional Molecules Ministry of Education Hunan University of Science and Technology Xiangtan411201 China

Lithium-sulfur batteries are considered as a promising energy storage solution due to their considerably high theoretical capacity of 1675 mAh g-1 and high energy density of 2600 Wh kg-1. Nevertheless, the lithium-sulfur batteries in commercial application is facing some challenges such as the shuttle effect. In this paper, the perovskite-type La2Ti2O7-x with oxygen defect is developed and applied as an advanced catalyst in lithium-sulfur batteries. It is found that La2Ti2O7-x with oxygen defects can not only strengthen the chemical binding between the metal sites and LiPSs, but also provide additional adsorption and catalytic sites. The as-prepared La2Ti2O7-x/S cathodes exhibit a high initial discharge specific capacity of 1047 mAh g-1 at 1 C (1 C=1675 mA g-1), and a capacity decay rate of merely 0.089% per cycle after 500 cycles. Therefore, this study demonstrates a significant approach to producing high-performance lithium-sulfur batteries using perovskite transition metal oxides as high efficiency electrocatalyst. © 2024, The Authors. All rights reserved.

关键词： Transition metals

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Self-cleaning and Oil/Water Separation of 3D Network Super-hydrophobic Bead-like Fluorinated Silica Pellets/Poly(aryl ether ketone)Composite Membrane Fabricated via a Facile One-step Electrospinning

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Chemical Research in Chinese Universities 2020年第6期36卷 1320-1325页

作者： CUI Zengduo WANG Yongpeng LIU Mengzhu ZHANG Haibo JIANG Zhenhua National&Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer College of ChemistryJilin UniversityChangchun 130012P.R.China College of Materials Science and Engineering Jilin Institute of Chemical TechnologyJilin 132022P.R.China

Novel super-hydrophobic fluorinated silica pellets/poly(aryl ether ketone)composite membranes with controllable structure have been prepared through incorporating poly(aryl ether ketonc)s with(3-triluoromethyl)-phenyl side groups and fluorinated silica pellets(F-SiO2)by a facile one-step *** the condition of adding 50%(mass fraction)F-SiO2 in the composite membrane,the water contact angle(WCA)reached its maximum(157°±4.3°).The controllable micro/nano-structures grown on the electrospun fibers could be regulated by the F-SiO2 loading,which was illustrated by scanning clectron microscopy(SEM).Moreover,these super-hydrophobic mem-branes also demonstrated excellent durability,anti-fouling property and oil-water separation ability after 200 h of water *** promising PAEK composite membranes with controllable structure have the potential values in large-scale application of filtration,oil-water separation and antifouling.

关键词： Poly(aryl ecther ketonc) Electrospinning Super-hydrophobic membrane Self-cleaning

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An efficient visible-light photocatalyst for CO2 reduction fabricated by cobalt porphyrin and graphitic carbon nitride via covalent bonding

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Nano Research 2020年第10期13卷 2665-2672页

作者： Shufang Tian Sudi Chen Xitong Ren Yaoqing Hu Haiyan Hu Jiajie Sun Feng Bai Key Laboratory for Special Functional Materials of Ministry of Education National&Local Joint Enginering Research Center for High-efficiency Display and Lighting TechnologySchool of Materials Science and Engineeringand Collaborative Innovation Center of NanoFunctional Materials and ApplicationsHenan UniversityKaifeng 475004China School of Physics and Electronics Henan UniversityKaifeng 475004China

Nanoparticle photosensitizers possess technical advantages for photocatalytic reactions due to enhanced light harvesting and efficient charge *** we report synthesis of semiconductor nanoparticles through covalent coupling and assembly of metalloporphyrin with condensed carbon *** resultant nanoparticles consist of light harvesting component from the condensed carbon nitride and photocatalytic sites from the *** synergetic particle system effectively initiates efficient charge separation and transport and exhibits excellent photocatalytic activity for CO2 *** CO production rate can reach up to 57μmol/(g·h)with a selectivity of 79%over competing H2 *** experiments demonstrate that the combination of light harvesting with photocatalytic activity via covalent assembly is crucial for the high photocatalytic *** to effective charge separation and transfer,the resultant nanoparticle photocatalysts show exceptional photo stability against photo-corrosion under light irradiation,enabling for long-term *** research opens a new way for the development of stable,effective nanoparticle photocatalysts using naturally abundant porphyrin pigments.

关键词： photocatalysis CO2 reduction carbon nitride porphyrin two-dimensional nanosheets function integrated covalent bonding

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Enhanced Energy Storage Performance of Nico-Ldh Nanosheets Decorated on Biomass-Derived Carbon Microtubes from Natural Poplar Catkins for Advanced Hybrid Supercapacitors

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SSRN 2024年

作者： Li, Wei Qian, Guo Guanjie, Ren Zhuokun, Li Jiachang, Li Hongwei, Yue Tingting, Li Li, Pinjiang Lou, Xiaojie Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province Institute of Surface Micro and Nano Materials College of Chemical and Materials Engineering Xuchang University Henan461000 China Key Laboratory for Special Functional Materials of Ministry of Education National & Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology School of Nanoscience and Materials Engineering Collaborative Innovation Center of Nano Functional Materials and Applications Henan University Kaifeng475004 China Henan Joint International Research Laboratory of Nanomaterials for Energy China Frontier Institute of Science and Technology State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi’an710049 China Shaanxi Normal University China

Nickel-cobalt layered double hydroxides (NiCo-LDHs) are promising electrode materials for hybrid supercapacitors (HSCs) due to their high theoretical charge storage capacity and excellent reversibility. However, their practical application is limited by low electrical conductivity and a tendency to agglomerate, which suppress their electrochemical performance. To address these challenges, NiCo-LDH NSs/CMT-PC composite electrode material is synthesized via a hydrothermal method. This composite integrates NiCo-LDH nanosheets (NiCo-LDH NSs) as a coating and carbon micro-tubes derived from poplar catkins (CMT-PC) with a high specific surface area as the framework. In a three-electrode system, the NiCo-LDH NSs/CMT-PC electrode demonstrated a specific capacity of 228.4 mAh g-1 (1644.5 F g-1, 822.2 C g-1) at a current density of 1 A g-1, and maintained a specific capacity of 101.7 mAh g-1 (732.2 F g-1, 366.1 C g-1) even at 30 A g-1. After 5000 cycles, the material exhibited excellent stability, retaining 96.5% of its capacity, with a decrease from 193.6 mAh g-1 to 186.9 mAh g-1. To explore its practical application in HSCs, we assembled NiCo-LDH NSs/CMT-PC//AC HSCs, using the NiCo-LDH NSs/CMT-PC as the positive electrode and activated carbon (AC) as the negative electrode. The assembled device exhibited a specific capacity of 88.3 mAh g-1 at 1 A g-1 and an energy density of 72.2 Wh kg-1 at a power density of 508.6 W kg-1. Impressively, after 9000 cycles at 3 A g-1, the specific capacity increased from 64.2 mAh g-1 to 66.5 mAh g-1, demonstrating exceptional cycling stability and suitability for practical applications. © 2024, The Authors. All rights reserved.

关键词： Nanosheets

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On the accurate characterization of quantum-dot light-emitting diodes for display applications

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npj Flexible Electronics 2022年第1期6卷 351-362页

作者： Wangxiao Jin Yunzhou Deng Bingbing Guo Yaxiao Lian Baodan Zhao Dawei Di Xiaowei Sun Kai Wang Shuming Chen Yixing Yang Weiran Cao Song Chen Wenyu Ji Xuyong Yang Yuan Gao Shuangpeng Wang Huaibin Shen Jialong Zhao Lei Qian Fushan Li Yizheng Jin Key Laboratory of Excited-State Materials of Zhejiang Province State Key Laboratory of Silicon MaterialsDepartment of ChemistryZhejiang University310027 HangzhouChina State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang University310027 HangzhouChina Department of Electronic and Electrical Engineering Southern University of Science and Technology518055 ShenzhenChina TCL Research ShenzhenGuangdongChina Shenzhen China Star Optoelectronics Semiconductor Display Technology Co. LtdShenzhenGuangdongChina College of Chemistry Chemical Engineering and Materials ScienceSoochow University199 Ren’ai Rd215123 SuzhouJiangsuChina Key Lab of Physics and Technology for Advanced Batteries(Ministry of Education) College of PhysicsJilin University130023 ChangchunChina Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University149 Yanchang RoadShanghai 200072China Najing Technology Corporation Ltd Hangzhou 310052China Institute of Applied Physics and Materials Engineering University of MacaoTaipaMacaoSAR 999078China Key Laboratory for Special Functional Materials of Ministry of Education National&Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technologyand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng 475004China School of Physical Science and Technology MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and MaterialsGuangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004China Division of Functional Materials and Nanodevices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China College of Physics and Information Engineering Fuzhou UniversityFuzhou 350108China

Quantum dot light-emitting diodes(QLEDs)are a class of high-performance solution-processed electroluminescent(EL)devices highly attractive for next-generation display *** the encouraging advances in the mechanism investigation,material chemistry,and device engineering of QLEDs,the lack of standard protocols for the characterization of QLEDs may cause inaccurate measurements of device parameters and invalid comparison of different ***,we report a comprehensive study on the characterizations of QLEDs using various *** show that the emission non-uniformity across the active area,nonLambertian angular distributions of EL intensity,and discrepancies in the adopted spectral luminous efficiency functions could introduce significant errors in the device *** errors in the operational-lifetime measurements may arise from the inaccurate determination of the initial luminance and inconsistent methods for analyzing the luminance-decay ***,we suggest a set of recommended practices and a checklist for device characterizations,aiming to help the researchers in the QLED field to achieve accurate and reliable measurements.

关键词： diodes characterization luminous

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Numerical Simulation of the Residual Stress of Ti600/Tc18 joint Welded by Inertial Friction Welding

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SSRN 2023年

作者： Liu, Ying-Ying Ren, Kai-Xin Zhang, Jun-Yi Li, Chun Liu, Shi-Feng Wang, Wen Wang, Kuai-She School of Metallurgical Engineering Xi’an University of Architecture and Technology Xi’an710055 China National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology Nanchang Hangkong University Nanchang330063 China National and Local Joint Engineering Research Center for Functional Materials Processing Xi'an University of Architecture and Technology Xi'An710055 China

The investigation of the residual stress distribution in the inertial friction welded joint of Ti600/TC18, both pre-and post-weld heat treatment, was carried out using Abaqus and XRD. The results show that the highest temperature during welding is up to 1200℃;it is subjected to tensile stress. As the welding goes on, the range of tensile stress is expanded gradually, and it is up to 8.92 MPa. During the welding, dynamic recrystallization is occurred in the weld zone, so the refined dynamic recrystallization grains are formed. After heat treatment, the martensitic transformation has occurred within β phase, there are αp, α', αs, and residual β phase in the weld zone. The heat treatment has an obvious effect on the distribution of longitudinal residual stress, which can promote the residual stress field to distribute more uniform and gradual. In addition, stress relief annealing can effectively reduce the peak tensile stress on the weld surface, which is related to the obvious growth of grain and the coarsening of lath-like α phase in the joint. Comparing the test values with that of the simulated values, the later exhibits better accuracy and stability. © 2023, The Authors. All rights reserved.

关键词： Tensile stress

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Free-standing ternary metallic sulphides/Ni/C-nanofiber anodes for high-performance lithium-ion capacitors

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Journal of Energy Chemistry 2020年第3期29卷 108-115页

作者： Ting Xing Yinghui Ouyang Liping Zheng Xianyou Wang Hong Liu Manfang Chen Ruizhi Yu Xingyan Wang Chun Wu National Base for International Science and Technology Cooperation National Local Joint Engineering Laboratory for Key Materials of New Energy Storage BatteryHunan Province Key Laboratory of Electrochemical Energy Storage and ConversionSchool of ChemistryXiangtan UniversityXiangtan 411105HunanChina College of Material Science and Engineering Changsha University of Science&TechnologyChangsha 410114HunanChina

As a promising energy-storage device,the hybrid lithium-ion capacitor coupling with both a large energy density battery-type anode and a high power density capacitor-type cathode is attracting great *** the sake of improving the energy density of hybrid lithium-ion capacitor,the free-standing anodes with good electrochemical performance are ***,we design an effective electrospinning strategy to prepare free-standing MnS/Co4S3/Ni3S2/Ni/C-nanofibers(TMSs/Ni/C-NFs)film and firstly use it as a binder-free anode for hybrid lithium-ion *** find that the carbon nanofibers can availably prevent MnS/Co4S3/Ni3S2/Ni nanoparticles from aggregation as well as significantly improve the electrochemical ***,the binder-free TMSs/Ni/C-NFs membrane displays an ultrahigh reversible capacity of 1246.9 m Ah g-1at 100 m A g-1,excellent rate capability(398 mAh g-1 at2000 mA g-1),and long-term cyclic ***,we further assemble the hybrid lithium-ion capacitor,which exhibits a high energy density of 182.0 Wh kg-1at 121.1 W kg-1(19.0 Wh kg-1 at 3512.5 W kg-1)and remarkable cycle life.

关键词： Electrospinning Free-standing Ternary metallic sulphides Hybrid lithium-ion capacitor Energy density

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Synergistic coupling of bipolar membrane electrodialysis and Fenton process for sustainable management of landfill leachate reverse osmosis concentrate

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Chemical engineering Journal 2025年 516卷

作者： Yang, Hao-Ran Li, Changjiang Zhang, Chiqian Lan, Xiaohong Dong, Xinfei Jiang, Yi-Hong Zheng, Yu-Ming Yuan, Zhi-Hua CAS Key Laboratory of Urban Pollutant Conversion Institute of Urban Environment Chinese Academy of Sciences Xiamen361021 China College of Life Sciences Fujian Agriculture and Forestry University Fuzhou350002 China University of Chinese Academy of Sciences Beijing100049 China National and Local Joint Engineering Research Center for Lithium-ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Battery Materials of Yunnan Province Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming650093 China College of Engineering & Computer Science Arkansas State University Jonesboro72467 United States

Landfill leachate reverse osmosis concentrate (LLRC) substantially challenges wastewater treatment because of the inhibition effects of inorganic ions and refractory organic compounds. This study integrated bipolar membrane electrodialysis (BMED) and Fenton oxidation for effective LLRC management. The BMED process had high desalination efficiency of 89.9 % and chloride (Cl−) removal of 97.1 %. Furthermore, the BMED process produced 0.38 mol/L of acids and 0.37 mol/L of bases, demonstrating its ability to recover inorganic salts and create an optimal environment for Fenton oxidation. The subsequent Fenton oxidation reduced the concentration of the refractory organic compounds to 35 mg/L of COD in the effluent. Cumulatively, the BMED-Fenton process achieved a 92.5 % COD reduction from LLRC. Modeling identifies 1000–1500 mg/L as the optimal operational Cl− concentrations for the Fenton oxidation, in which range the oxidation is most effectively enhanced. Economic analysis revealed that the cost of the BMED-Fenton system treating LLRC is $4.76/m3, underscoring its financial viability. The study also elucidated the pathways for transforming complex, toxic organic compounds to simpler, less toxic forms. This research provides a theoretical framework for resource recovery and compliant discharge of LLRC, offering an economical, practical, and sustainable management solution for high-salinity organic wastewater. © 2025 Elsevier B.V.

关键词： Desalination

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Realization of blue-red dual-emission via energy transfer in Na 3 KMg 7 (PO 4 ) 6 : Eu 2+ , Mn 2+ phosphor for plant growth application

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Journal of Rare Earths 2024年

作者： Ruijie Ji Takatoshi Seto Yuhua Wang National and Local Joint Engineering Laboratory for Optical Conversion Materials and Technology School of Materials and Energy Lanzhou University Lanzhou 730000 China

A blue-red dual-emitting phosphor, Na 3 KMg 7 (PO 4 ) 6 : Eu 2+ , Mn 2+ was developed in this study. Eu 2+ acts as a sensitizer ion in Na 3 KMg 7 (PO 4 ) 6 : Mn 2+ , which significantly improves the undesirable luminous efficiency of Mn 2+ . The energy transfer between Eu 2+ and Mn 2+ significantly boosts both internal quantum efficiency (IQE) and external quantum efficiency (EQE) of the phosphor, achieving values of 72.5% and 42.6%, respectively. Additionally, the phosphor demonstrates exceptional thermal stability, at 150 °C, maintaining 71.49% of its initial emission intensity. The emission spectrum of the phosphor closely matches the chlorophyll’s absorption spectra, with similarities of 75.06% and 94.52%, respectively. This was further confirmed through a fabricated LED with a n-UV chip (395 nm). To further assess the potential for agritech applications, a light-conversion film incorporating the developed phosphor in PDMS glue was prepared. An outdoor cultivation trial with Chlorella showed that the algae's growth rate improves by 27.3% relative to a control group. These results reveal the significant potential of the Na 3 KMg 7 (PO 4 ) 6 : Eu 2+ , Mn 2+ phosphor for enhancing plant growth in practical applications.

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Enhanced Quantum Efficiency via Co-Substitution in Red-Emitting Phosphor Sr2[MgAl5N7] : Eu2+for Advanced Spectroscopic Applications Including Laser Displays with Ultra-High Luminescence Saturation Threshold

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Angewandte Chemie 2024年第7期137卷

作者： Zebin Li Haoyang Wang Zhezhe Su Runtian Kang Takatoshi Seto Yuhua Wang National & local Joint Engineering Laboratory for Optical Conversion Materials and Technology School of Materials and Energy Lanzhou University 730000 Lanzhou China

In order to obtain novel and more efficient red light-emitting materials, a series of Sr 2 [Mg 1−x Li x Al 5−x Si x N 7 ] : 0.01Eu 2+ (SMAN-xLS, 0≤x≤0.5) red phosphors were devised and successfully synthesized via the high temperature solid state reaction and the effects of the co-substitution of [Mg−Al] 5+ by [Li−Si] 5+ on structural and luminescence properties is investigated in detail. A series of powder XRD data and Rietveld refinement indicate that [Li−Si] 5+ co-substitution can successfully enter the Sr 2 [MgAl 5 N 7 ] : 0.01Eu 2+ (SMAN) lattice. With the entry of [Li−Si] 5+ into the lattice, the substitution of Al 3+ by Si 4+ leads to the weakening of the nephelauxetic effect of the 5d level of Eu 2+ , which shifts the emission peak from 657 nm to 647 nm and reduces the excitation in the green region, i.e., lowers the absorption of green light. When the amount of [Li−Si] 5+ co-substitution is x =0.1, the luminescence intensity and thermal stability of the sample are enhanced, in which the external quantum efficiency (EQE), reflecting the luminescence intensity, is elevated by 49.6 %. The increase in lattice rigidity gives rise to higher luminescence intensity, and the introduced trap levels for the compensation of luminescence enhances the thermal stability. Under blue laser excitation, the SMAN-0.1LS can achieve an ultra-high luminescence saturation threshold of 52.22 W/mm 2 , which is remarkably superior to other existing red phosphors, a breakthrough performance that has enormous potential for application in high-power laser display light sources. Cathodoluminescence (CL) characterization and measurements attest to the favorable CL properties of SMAN-0.1LS. By measuring the pressure-dependent luminescence of SMAN-0.1LS, the emission peak can be shifted from 650 nm to 702 nm with the increase of pressure, and the sensitivity dλ/dP is 5.07 nm/GPa, which is indicative of the potential application of this system as an optical pressure sensor.

关键词： nitride phosphor substitution photoluminescence thermal stability laser cathodoluminescence high pressure

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