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Nanopore design of sulfur doped hollow carbon nanospheres for superior potassium-ion battery anodes

Rare Metals 2024年第5期43卷 2103-2114页

作者： Zhen-Dong Liu Hui-Yan Feng Yu-Chen Wang Fei Wang Yue Liu Jian-Xiao Yang Yue Gu Jun Tan Chong Ye cheng-zhi zhang Ji Hua Laboratory Foshan 528000China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology College of Materials Science and EngineeringHunan UniversityChangsha 410082China

Sulfur doped carbonaceous materials are promising anodes for potassium-ion batteries because of their ability to bridge active sites and induce C/S electron coupling,resulting in increased ion storage capacitance However,the large potassium ions could cause significant volume expansion and structure collapse during operation in sulfur doped carbonaceous anodes,which lead to rapidly capacity sacrifice during long-term *** design for anchoring sulfur atom in carbon skeleton is a novel way to alleviate the structure collapse and maintain the cycling ***,this study developed a controlled nanopore and sulfur doped carbon sphere structure(S-NPHCSs).In potassium-ion batteries S-NPHCSs anode demonstrated exceptional performance with a high reversible capacity of 247 mAh·g^(–1)after 50 cycles at 0.2 A·g^(–1)and delivered a long cycle stability of 600 cycles at a high current density of 1.0 A·g^(–1).Interconnected nanopores and doped sulfur structure not only expand the accumulation space and offer ample active sites for diffusion and adsorption of potassium ions,but also build stable channels through nanopore structure to ensure the cyclic *** finding provides a fundamental theory for designing nanopore structures and introducing sulfur doped carbonaceous materials to enhance capacitive potassium storage and long cycle stability.

关键词： Nanopore Carbon materials Sulfur doping Anode Potassium-ionbatteries

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Direct measurement of the break-out ^(19)F(p,γ)^(20)Ne reaction in the China Jinping underground laboratory(CJPL)

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Nuclear Science and Techniques 2024年第8期35卷 142-152页

作者： Yin‑Ji Chen Hao zhang Li‑Yong zhang Jian‑Jun He Richard James deBoer Michael Wiescher Alexander Heger David Kahl Jun Su Daniel Odell Xin‑Yue Li Jian‑Guo Wang Long zhang Fu‑Qiang Cao zhi‑cheng zhang Xin‑zhi Jiang Luo‑Huan Wang Zi‑Ming Li Lu‑Yang Song Liang‑Ting Sun Qi Wu Jia‑Qing Li Bao‑Qun Cui Li‑Hua Chen Rui‑Gang Ma Er‑Tao Li Gang Lian Yao‑De Sheng zhi‑Hong Li Bing Guo Wei‑Ping Liu Key Laboratory of Beam Technology of the Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Department of Physics and Astronomy The Joint Institute for Nuclear AstrophysicsUniversity of Notre DameNotre DameIN 46556USA School of Physics and Astronomy Monash UniversityClaytonVIC 3800Australia Facility for Rare Isotope Beams Michigan State UniversityEast LansingMI 48824USA Institute of Nuclear and Particle Physics and Department of Physics and Astronomy Ohio UniversityAthensOH 45701USA Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China China Institute of Atomic Energy Beijing 102413China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China College of Science Southern University of Science and TechnologyShenzhen 518055China Institute of Radiation Technology Beijing Academy of Science and TechnologyBeijing 100875China Key Laboratory of Nuclear Physics and Ion‑Beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Mathematics and Physics Handan UniversityHandan 056005China

Calcium production and the stellar evolution of first-generation stars remain fascinating mysteries in *** one possible nucleosynthesis scenario,break-out from the hot carbon–nitrogen–oxygen(HCNO)cycle was thought to be the source of the calcium observed in these oldest ***,according to the stellar modeling,a nearly tenfold increase in the thermonuclear rate ratio of the break-out ^(19)F(p,γ)^(20) Ne reaction with respect to the competing ^(19)F(p,α)^(16) O back-processing reaction is required to reproduce the observed calcium *** performed a direct measurement of this break-out reaction at the China Jinping underground *** measurement was performed down to the low-energy limit of E_(c.m.)=186 keV in the center-of-mass *** key resonance was observed at 225.2 keV for the first *** a temperature of approximately 0.1 GK,this new resonance enhanced the thermonuclear ^(19)F(p,γ)^(20) Ne rate by up to a factor of≈7.4,compared with the previously recommended NACRE *** is of particular interest to the study of the evolution of the first stars and implies a stronger breakdown in their“warm”CNO cycle through the ^(19)F(p,γ)^(20) Ne reaction than previously *** break-out resulted in the production of the calcium observed in the oldest stars,enhancing our understanding of the evolution of the first stars.

关键词： Nuclear astrophysics First stars Abundance of calcium Reaction cross section Reaction rate China Jinping underground laboratory(CJPL) JUNA

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Stepped-up development of accelerator mass spectrometry method for the detection of ^(60)Fe with the HI-13 tandem accelerator

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Nuclear Science and Techniques 2024年第4期35卷 136-143页

作者： Yang zhang Sheng-Quan Yan Ming He Qing-zhang Zhao Wen-Hui zhang Chao-Xin Kan Jian-Ming Zhou Kang-Ning Li Xiao-Fei Wang Jian-cheng Liu Zhao-Hua Peng Zhuo Liang Ai-Ling Li Jian Zheng Qi-Wen Fan Yun-Ju Li You-Bao Wang zhi-Hong Li Yang-Ping Shen Ding Nan Wei Nan Yu-Qiang zhang Jia-Ying-Hao Li Jun-Wen Tian Jiang-Lin Hou Chang-Xin Guo zhi-cheng zhang Ming-Hao Zhu Yu-Wen Chen Yu-Chen Jiang Tao Tian Jin-Long Ma Yi-Hui Liu Jing-Yu Dong Run-Long Liu Mei-Yue-Nan Ma Yong-Shou Chen Wei-Ping Liu Bing Guo China Institute of Atomic Energy P.O.Box 275(10)Beijing 102413China College of Science Southern University of Science and TechnologyShenzhen 518055China School of Physics Xi’an Jiaotong UniversityXi’an 710049China

The Moon provides a unique environment for investigating nearby astrophysical events such as *** samples retain valuable information from these events,via detectable long-lived“fingerprint”radionuclides such as^(60)*** this work,we stepped up the development of an accelerator mass spectrometry(AMS)method for detecting^(60)Fe using the HI-13tandem accelerator at the China Institute of Atomic Energy(CIAE).Since interferences could not be sufficiently removed solely with the existing magnetic systems of the tandem accelerator and the following Q3D magnetic spectrograph,a Wien filter with a maximum voltage of±60 kV and a maximum magnetic field of 0.3 T was installed after the accelerator magnetic systems to lower the detection background for the low abundance nuclide^(60)Fe.A 1μm thick Si_(3)N_(4) foil was installed in front of the Q3D as an energy *** particle detection,a multi-anode gas ionization chamber was mounted at the center of the focal plane of the ***,an^(60)Fe sample with an abundance of 1.125×10^(-10)was used to test the new AMS *** results indicate that^(60)Fe can be clearly distinguished from the isobar^(60)*** sensitivity was assessed to be better than 4.3×10^(-14)based on blank sample measurements lasting 5.8 h,and the sensitivity could,in principle,be expected to be approximately 2.5×10^(-15)when the data were accumulated for 100 h,which is feasible for future lunar sample measurements because the main contaminants were sufficiently separated.

关键词： Accelerator mass spectrometry Wien filter Isobar separation Supernovae Chang'e-5 lunar samples

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Nonlinear dynamic response of stay cables under axial harmonic excitation

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第9期9卷 1193-1200页

作者： Xu XIE He zhang zhi-cheng zhang Department of Civil Engineering Zhejiang University Hangzhou 310027 China

This paper proposes a new numerical simulation method for analyzing the parametric vibration of stay cables based on the theory of nonlinear dynamic response of structures under the asynchronous support excitation. The effects of important pa- rameters related to parametric vibration of cables, i.e., characteristics of structure, excitation frequency, excitation amplitude, damping effect of the air and the viscous damping coefficient of the cables, were investigated by using the proposed method for the cables with significant length difference as examples. The analysis results show that nonlinear finite element method is a powerful technique in analyzing the parametric vibration of cables, the behavior of parametric vibration of the two cables with different Irvine parameters has similar properties, the amplitudes of parametric vibration of cables are related to the frequency and amplitude of harmonic support excitations and the effect of distributed viscous damping on parametric vibration of the cables is very small.

关键词： Stay cables Parametric vibration Nonlinear vibration Viscous damping

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K+-enhanced electrocatalytic CO_(2) reduction to multicarbon products in strong acid

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Rare Metals 2022年第3期41卷 723-725页

作者： Jun-Jun Li zhi-cheng zhang Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University&Collaborative Innovation Center of Chemical Science and EngineeringTianjin 300072China

Electrocatalytic CO_(2) reduction reaction(CO_(2) RR)has been regarded as a highly effective strategy to produce valuable fuels and feedstocks,contributing to achieving a carbon–neutral cycle and dramatically mitigating CO_(2) emission[1–6].Generally,alkaline or near-neutral solution,such as KOH or KHCO3aqueous solution,is employed as elec-trolytes for CO_(2) RR owing to higher solubility of CO_(2) in electrolytes[1,7–10].

关键词： neutral carbon solubility

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Sn-Bi bimetallic interface induced by nano-crumples for CO_(2) electroreduction to formate

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Rare Metals 2022年第12期41卷 3943-3945页

作者： Li Li zhi-cheng zhang Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin UniversityTianjin 300072China

Electrochemical carbon dioxide(CO_(2))reduction reaction(CO_(2)RR),powered by a renewable energy source,to valueadded chemicals and fuels is a promising solution to mitigate the ever-increasing CO_(2)emission and buil... 详细信息

关键词： dioxide carbon Electrochemical

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Recent progress in structural modulation of metal nanomaterials for electrocatalytic CO_(2) reduction

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Rare Metals 2021年第6期40卷 1412-1430页

作者： Chen-Huai Yang Farhat Nosheen zhi-cheng zhang Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University&Collaborative Innovation Center of Chemical Science and EngineeringTianjin 300072China Department of Chemistry Division of Science and TechnologyUniversity of EducationLahore 54660Pakistan

The electrochemical CO_(2) reduction(ECR)into value-added products presents an appealing approach to mitigate CO_(2) emission caused by excess consumption of fossil *** obtain high catalytic activity and selectivity toward target product in ECR,designing and developing a stable and efficient electrocatalyst is of significant *** date,metal nanomaterials have been widely applied as electrocatalysts for ECR due to their unique physicochemical *** structural modulation of metal nanomaterials is an attractive strategy to improve the catalytic *** this review,the recent progress of structural modulation,including size,facet,grain boundary,composition,interface,ligand modification,and crystal phase,is systematically summarized from both theoretical and experimental ***,the opportunities and perspectives of structural modulation of metal nanomaterials for ECR are proposed.

关键词： CO_(2)reduction Structural modulation Electrocatalysis Metal nanomaterial Crystal phase

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The Application of Controlled/Living Radical Polymerization in Modification of PVDF-based Fluoropolymer

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Chinese Journal of Polymer Science 2021年第9期39卷 1110-1126页

作者： Hong-Hong Gong Ying zhang Yi-Pin cheng Ming-Xin Lei zhi-cheng zhang Xi'an Key Laboratory of Sustainable Energy Materials Chemistry Department of Applied ChemistrySchool of ChemistryXi'an Jiaotong UniversityXi'an 710049China Xi'an Jiaotong University Suzhou Academy Suzhou 215123China

Fluorinated polymers are important materials that are widely used in many areas as taking the advantage of inertness to chemical corrosion,prominent weather resista nee,low flammability,and good thermal ***(vinylidene fluoride)(PVDF)based fluoropolymers is the most commontype of commercial fluoropolymer especially used as dielectric ***,there are always some shortcomings in practical applications,so it is necessary to modify PVDF-based fluoropolymers for better ***/living radical polymerization(CRP)and related techniques have become a powerful approach to tailoring the chemical and physical properties of materials and have given rise to great advances in modification of PVDF-based fluoropolymers.

关键词： CRP PVDF-based fluoropolymers ATRP RAFT

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Unraveling molecular-level mechanisms of reactive facet of carbon nitride single crystals photocatalyzing overall water splitting

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Rare Metals 2020年第12期39卷 1353-1355页

作者： Cong-Yong Wang Chen-Huai Yang zhi-cheng zhang Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207China Department of Chemistry National University of SingaporeSingapore 117543Singapore Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University&Collaborative Innovation Center of Chemical Science and EngineeringTianjin 300072China

Despite the reactive facets play a vital role in designing highly efficient photocatalysts,it has long been a tremendous challenge to reveal the principle that reactive facets favor photocatalysis at the molecular ***... 详细信息

关键词： splitting catalysis designing

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Organoimido functionalized trinuclear gold(Ⅰ)clusters with fluorescent chromophore

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Rare Metals 2021年第6期40卷 1437-1442页

作者： Chun-Lin Lv Chen-Huai Yang Li-Ya Liu zhi-cheng zhang Key Laboratory of Ethnomedicine(Minzu University of China) Ministry of EducationBeijing 100081China School of Pharmacy and Center on Translational Neuroscience Minzu University of ChinaBeijing 100081China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University&Collaborative Innovation Center of Chemical Science and EngineeringTianjin 300072China College of Life and Environmental Sciences Minzu University of ChinaBeijing 100081China

The post-functionalization of gold nanoclusters with organic molecules into organic-inorganic hybrid functional materials is an efficient approach to develop multifunctional *** introducing 1-pyrenamine and 3-aminofluoranthene into[O(AuPPh_(3))_(3)][BF_(4)]with a covalent bond,two novel organoimido functionalized trinuclear gold nanoclusters[C_(16)H_(9)N(AuPPh_(3))_(3)][BF_(4)](Au_(3)-P)and[C_(6)H_(4)-C_(10)H_(5)N(AuPPh_(3))_(3)][BF_(4)](Au_(3)-F)have been successfully *** structures have been determined by electrospray ionization mass spectroscopy(ESI-MS)and single-crystal X-ray diffraction(SC-XRD),and the photoluminescence properties have been investigated from both experimental and theoretical *** is found that the lowest-energy electronic transitions in the ultraviolet-visible(UV-Vis)absorption spectra of Au_(3)-P(403 nm)and Au_(3)-F(425 nm)exhibit a slight bathochromic shift compared to the corresponding transitions in the spectra of 1-pyrenamine and 3-aminofluoranthene,*** addition,the dichloromethane solutions of Au_(3)-P and Au_(3)-F complexes clearly display blue and yellowish-green fluorescence,*** results will help to design and prepare organic-inorganic nanocluster hybrid luminescent materials for potential applications in(bio)sensors,bioimaging and optoelectronic devices.

关键词： Nanoclusters Gold Organoimido Photoluminescence

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