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Unraveling the catalytic redox mechanism of lithium–sulfur batteries through advanced in-situ/operando characterizations

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Science China Chemistry 2024年

作者： pan Zeng Cheng Yuan Bin Su Genlin Liu Jiechang Gao Kun Yang Qingyuan Wang Liang Zhang institute for Advanced Study School of Mechanical Engineering Chengdu University institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Dyson School of Design Engineering Imperial College London

Accelerating the redox conversion of lithium polysulfides(LiPSs) with electrocatalysts has been regarded as an effective avenue to surmount the shuttle effect and realize high-performance lithium–sulfur(Li–S) batteries. However, the complicated reaction process, especially the real-time evolution of sulfur-containing species and electrocatalysts under working conditions, has brought great difficulties in the explicit understanding of reaction mechanism of Li–S batteries, thereby severely hampering the design of highly efficient electrocatalysts. Therefore, a crucial prerequisite for correctly identifying the reaction mechanism is an in-depth analysis of the dynamic evolution of reaction intermediates and their structure-performance relationships. In this review,we comprehensively summarized the most recent progress in the dynamic behaviors of LiPSs and electrocatalysts of Li–S batteries under working conditions in conjunction with closely related in-situ/operando characterizations to recognize the realtime evolution of phase, composition, and atomic/electronic structure, thereby unraveling the corresponding catalytic mechanism. In addition, the major challenges and unexplored issues of catalytic conversion of LiPSs were summarized and discussed, aiming to provide perspectives into the development of highly efficient electrocatalysts in Li–S chemistry. Based on this review, we believe that reasonable regulation of reconstruction behaviors can achieve satisfactory electrocatalysts with high catalytic activity, accelerating the development of green energy.

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超音速绕流Mach-Zehnder干涉图分析的Abel变换

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光学学报 1981年第5期 423-432页

作者：丁培柱潘守甫吉林大学原子与分子物理研究所

本文处理了含激波的柱对称或球对称抛射体超音速统流Mach-Zehnder干涉图分析的Abel变换问题。我们对一般的Abel积分方程研究了具有有限个间断点的解的某些性质;将其应用到Mach-Zehnder干涉图的干涉条纹移动δ（x）和密度ρ（x）间的Abe... 详细信息

本文处理了含激波的柱对称或球对称抛射体超音速统流Mach-Zehnder干涉图分析的Abel变换问题。我们对一般的Abel积分方程研究了具有有限个间断点的解的某些性质;将其应用到Mach-Zehnder干涉图的干涉条纹移动δ（x）和密度ρ（x）间的Abel变换上,得到了三个有明显物理意义的结论,（1）干涉图上的任一直线上的干涉条纹移动δ（x）是x的连续函数;（2.若在截面1-1上的圆环r=c处有激波,则当x→c时,δ’（x）～L/（c-x）1/2.（3.若除尖点c外,干涉条纹移动δ（x）是光滑的,limδ’（x）存在,且当x→c时,δ’（x）～L/（c-x）1/2.则流场中于圆环r=c处出现激波,在激波两侧密度跳跃值为Δρ=λ*L/K（2.）1/2.且对r≥c和r

关键词：干涉图超音速绕流 Mach-Zehnder 干涉条纹 Abel

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Benchmark experiment on slab^(2.8)U with D-T neutrons for validation of evaluated nuclear data

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Nuclear Science and Techniques 2024年第2期35卷 145-159页

作者： Yan-Yan Ding Yang-Bo Nie Yue Zhang Zhi-Jie Hu Qi Zhao Huan-Yu Zhang Kuo-Zhi Xu Shi-Yu Zhang Xin-Yi pan Chang-Lin Lan Jie Ren Xi-Chao Ruan Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000China institute of Fluid Physics China Academy of Engineering PhysicsMianyang 62100China

A benchmark experiment on^(2.8)U slab samples was conducted using a deuterium-tritium neutron source at the China institute of atomic *** leakage neutron spectra within energy levels of 0.8-16 MeV at 60°and 12.°were measured using the time-of-flight *** samples were prepared as rectangular slabs with a 3. cm square base and thicknesses of 3.6,and 9 *** leakage neutron spectra were also calculated using the MCNP-4C program based on the latest evaluated files of^(2.8)U evaluated neutron data from CENDL-3.2.ENDF/B-Ⅷ.0,JENDL-5.0,and *** on the comparison,the deficiencies and improvements in^(2.8)U evaluated nuclear data were *** results showed the following.(1)The calculated results for CENDL-3.2.significantly overestimated the measurements in the energy interval of elastic scattering at 60°and 12.°.(2.The calculated results of CENDL-3.2.overestimated the measurements in the energy interval of inelastic scattering at 12.°.(3.The calculated results for CENDL-3.2.significantly overestimated the measurements in the 3.8.5 MeV energy interval at 60°and 12.°.(4)The calculated results with JENDL-5.0 were generally consistent with the measurement results.

关键词： Leakage neutron spectra Uranium D-T neutron source Evaluated nuclear data

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Generating a nanoscale blade-like optical field in a coupled nanofiber pair

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Photonics Research 2024年第1期12卷 154-162页

作者： YUXIN YANG JIAXIN GAO HAO WU ZHANKE ZHOU LIU YANG XIN GUO pan WANG LIMIN TONG Interdisciplinary Center for Quantum Information New Cornerstone Science LaboratoryState Key Laboratory of Extreme Photonics and InstrumentationCollege of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China Jiaxing Key Laboratory of Photonic Sensing&Intelligent Imaging Intelligent Optics&Photonics Research CenterJiaxing Research Institute Zhejiang UniversityJiaxing 314000China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

An optical field with sub-nm confinement is essential for exploring atomic-or molecular-level light-matter *** such fields demonstrated so far have typically point-like cross-sections,an optical field having a higher-dimensional cross-section may offer higher flexibility and/or efficiency in ***,we propose generating a nanoscale blade-like optical field in a coupled nanofiber pair(CNP)with a 1-nm-width central *** on a strong mode coupling-enabled slit waveguide mode,a sub-nm-thickness blade-like optical field can be generated with a cross-section down to~0.2. nm×3. nm at 1550 nm wavelength(i.e.,a thickness of~λ_(0)∕5000)and a peak-to-background intensity ratio(PBR)higher than 2. d *** slit waveguide mode of the CNP can be launched from one of the two nanofibers that are connected to a standard optical fiber via an adiabatical fiber taper,in which a fundamental waveguide mode of the fiber can be converted into a high-purity slit mode with high efficiency(>98%)within a CNP length of less than 10μm at 1550 nm *** wavelengthdependent behaviors and group velocity dispersion in mode converting processes are also investigated,showing that such a CNP-based design is also suitable for broadband and ultrafast pulsed *** results may open up new opportunities for studying light-matter interaction down to the sub-nm scale,as well as for exploring ultra-high-resolution optical technology ranging from super-resolution nanoscopy to chemical bond manipulation.

关键词： fiber waveguide optical

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CALCULATION OF TOTAL CROSS SECTIONS FOR THE SCATTERING OF SLOW ELECTRONS BY NITROGEN,OXYGEN AND NEON ATOMS

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Science in China,Ser.A 1981年第8期 1075-1084页

作者：苟清泉潘守甫赵永芳徐洪山丁培柱 institute of atomic and {2. Physics jilin University

Using the following analytic wave functions for atomic electrons 1s electron:φ1（r）=N1eμar,2. electron:φ2.r）=N2.（μr）eμr-Neμar],2. electrons:φ3.r）=N3.μr）cosθe-μr, φ4（r）=N4（μr）sinθeiφ-μr, φ5（r）=N5（μr）sinθe-2.-μr,we have derived the analytic potential functions for the interction of the incident electronswith the atomic electrons and nuclei of nitrogen, oxygen and neon, including the exchange andpolarization effects. With the partial wave method, we have further calculated the distortedwave functions, phase shifts and scattering cross-sections for the slow electrons moving in theatomic fields represented by the derived potential functions. The numerical results for thescattering cross sections are in good agreement with exprimentals.

关键词： CALCULATION OF TOTAL CROSS SECTIONS FOR THE SCATTERING OF SLOW ELECTRONS BY NITROGEN,OXYGEN AND NEON ATOMS

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Estimation of Soot and Airborne Radionuclide Emission Factors from Coal-Fired Power Plants in China

Estimation of Soot and Airborne Radionuclide Emission Factor...

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The Second Asian and Oceanic Congress for Radiation Protection

作者： JIANG Ziying1 3. pan Ziqiang2. LIU Senlin1, CHENG Jianping3. WANG Jue3. WANG Chunhong1 1. Division of Health Physics, China institute of {2. Energy, Beijing, China 2. Science & Technology Committee, CNNC, Beijing, China 3. Department of Engineering Physics, Tsinghua University, Beijing, China

As main energy resource in China, coal-fired power is one of the major causes of atmosphere pollution. Comparison of environment impacts for coal, nuclear and other energy provides important information for energy sustainable development decision-making. Study on soot and airborne radionuclide emission factors for coal-fired power plants is important part as atmosphere environment impacts of coal energy. Based on the data that effect soot emission, such as installed capacity, dust removal technique, boiler and combustion conditions of coal-fired power plant at present in China, three type emission levels （high, middle and low） of coal-fired plants are analyzed and the general soot emission factor is estimated with the result: 4.4g/kWh. It is much higher in China than foreign advanced countries’ level and the main reasons are: high energy consumption of electricity production, various levels of dust precipitation and low efficiency in whole, and some high pollution, low parameters and small capacity coal-fired plants still taking certain proportion. With soot some natural radionuclide and their descendant （U series, Th series and 40K） in coal emit to atmosphere. Based on collection and analysis of survey data and experiment results on radionuclide content in coal and coal-fired ashes, the airborne radionuclide emission factors are estimated with the results: 2.6Ra is 0.68Bq/kWh, 2.2.h is 0.56Bq/kWh, 2.8U is 0.74Bq/kWh, 2.0Pb is 3.54Bq/kWh, 2.0Po is 2.79Bq/kWh and 40K is 1.3.Bq/kWh, which perform the practical emission level for coal-fired power plant in China.

关键词： soot radionuclide emission factor coal-fired power plant

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K,Cu,Rb,Ag和Cs原子第一离化势的相对论HFS计算

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吉林大学自然科学学报 1987年第3期 59-62页

作者：赵永芳潘守甫原子与分子物理研究所

本文在相对论的Hartree-Fock-Slater(RHFS)近似中,考虑了原子中价电子和核实电子之间的极化效应,使用类似于“冻结核实”和“弛豫核实”近似的方法,对K,Cu,Rb,Ag和Cs原子的第一离化势分别进行了计算。计算结果与实验数据比较,偏差较小。

关键词：极化效应冻结核实弛豫核实第一离化势

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稀土元素Ac,Th,Pa和U原子的单电子能量本征值以及X射线能量的相对论计算

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光学学报 1986年第8期6卷 753-758页

作者：赵永芳王振潘守甫吉林大学原子与分子物理研究所

本文采用相对论的Hartree-Fock-Slater(HFSD)近似方法,对稀土族的Ac,Th,Pa和U原子的单电子能量本征值和K_α,K_β和H_β等八条X射线的能量进行了数值计算.同时还使用了交换势的相对论修正重复了上述计算.计算结果同实验数据的比较表明,... 详细信息

本文采用相对论的Hartree-Fock-Slater(HFSD)近似方法,对稀土族的Ac,Th,Pa和U原子的单电子能量本征值和K_α,K_β和H_β等八条X射线的能量进行了数值计算.同时还使用了交换势的相对论修正重复了上述计算.计算结果同实验数据的比较表明,X射线能量的HFSD值与实验值的相对偏差达到低于0.3.的符合程度.

关键词：相对论内壳层交换势场论 Ac,Th,Pa 电子能量本征值原子分子稀土元素 ⅢB族元素 Th

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Guided bone regeneration in long-bone defect with a bilayer mineralized collagen membrane

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Collagen and Leather 2024年第1期5卷 85-100页

作者： Fuli Peng Xuelei Zhang Yilei Wang Rui Zhao Zhiwei Cao Siyu Chen Yunxuan Ruan Jingjing Wu Tianxi Song Zhiye Qiu Xiao Yang Yi Zeng Xiangdong Zhu Jian pan Xingdong Zhang Department of Orthopedics West China HospitalOrthopedic Research InstituteSichuan University National Engineering Research Center for Biomaterials Sichuan University Chengdu Integrated TCM and Western Medicine Hospital Chengdu First People's Hospital Department of Inspection School of MedicineJiangsu University State Key Laboratory of Oral Diseases and National Center for Stomatology and National Clinical Research Center for Oral Diseases Department of Oral and Maxillofacial SurgeryWest China Hospital of StomatologySichuan University State Key Laboratory of New Ceramics and Fine Processing Key Laboratory of Advanced Materials of Ministry of EducationSchool of Materials Science and EngineeringTsinghua University

Bone regeneration for large,critical-sized bone defects remains a clinical challenge *** bone regeneration(GBR) is a promising technique for the repair of multiple bone defects,which is widely used in oral and maxillofacial bone defects but is still unsatisfied in the treatment of long bone ***,we successfully fabricated a bilayer mineralized collagen/collagen(MC/Col)-GBR membrane with excellent osteoinductive and barrier function by coating the MC particles prepared via in situ biomimetic mineralization process on one side of a sheet-like pure collagen *** aim of the present study was to investigate the physicochemical properties and biological functions of the MC/Col film,and to further evaluate its bone regeneration efficiency in large bone defect *** infrared spectra and X-ray diffraction patterns confirmed the presence of both hydroxyapatite and collagen phase in the MC/Col film,as well as the chemical interaction between *** microscope,scanning electron microscopy and atomic force microscope showed the uniform distribution of MC particles in the MC/Col film,resulting in a rougher surface compared to the pure Col *** quantitative analysis of surface contact angle,light transmittance and tensile strength demonstrated that the MC/Col film have better hydrophilicity,mechanical properties,light-barrier properties,*** vitro macrophage co-culture experiments showed that the MC/Col film can effectively inhibit macrophage proliferation and fusion, reducing fibrous capsule *** vivo bone repair assessment of a rabbit critical segmental radial defect proved that the MC/Col film performed better than other groups in promoting bone repair and regeneration due to their unique dual osteoinductive/barrier *** findings provided evidence that MC/Col film has a great clinical potential for effective bone defect repair.

关键词： Mineralized collagen Collagen Guided bone regeneration Artificial periosteum Bone defect repair

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Multiparty quantum secret sharing of classical and quantum messages

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Progress in Natural Science:Materials International 2007年第1期17卷 26-31页

作者： CHEN pan, DENG Fuguo and LONG Guilu ( Key Laboratory for Quantum Information and Measurements, and Department of Physics, Tsinghua University, Beijing 100084, China Key Laboratory of Beam Technology and Material Modification, MOE, institute of Low Energy Nuclear Physics, and Department of Material Science and Engineering, Beijing Normal University, Beijing 100875, China Beijing Radiation Center, Beijing 100875, China Key Laboratory for {2. and {3. Nano-Sciences, Tsinghua University, Beijing 100084, China) Key Laboratory for Quantum Information and Measurements Department of Physics Tsinghua University Beijing 100084 China Key Laboratory of Beam Technology and Material Modification Beijing Normal University Beijing 100875 China institute of Low Energy Nuclear Physics Department of Material Science and Engineering Beijing Normal University Beijing 100875 China Beijing Radiation Center Beijing 100875 China Key Laboratory for atomic and molecular Nano-Sciences Tsinghua University Beijing 100084 China

A scheme for multiparty quantum secret sharing of classical and quantum messages is proposed by using entanglement swapping. This scheme can distribute not only the classical information but also the quantum informati... 详细信息

关键词： quantum secret sharing classical message quantum message EPR pair.

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