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Heterostructure:application of absorption-catalytic center in lithium-sulfur batteries

Rare Metals 2024年第4期43卷 1461-1487页

作者： Fei Wang Chun-Man Yang Yong-Qi Wang Dan You Wen-Hao Yang Rong-Wei Huang Ji-Yue Hou Qian Wang ying-jie zhang ying Wang Yue-Jing Zeng Yi-Yong zhang Xue Li National Local Joint Engineering Research Center for Lithium-Ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Batteries Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming650093China College of Electrical Information Engineering Panzhihua UniversityPanzhihua617000China State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Centre of Chemistry for Energy MaterialsState-Province Joint Engineering Laboratory of Power Source Technology for New Energy VehicleEngineering Research Center of Electrochemical TechnologyMinistry of EducationCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China

Due to the high theoretical specific capacity(1675 mAh·g^(-1)),low cost,and high safety of the sulfur cathodes,they are expected to be one of the most promising rivals for a new generation of energy storage ***,the shuttle effect,low conductivity of sulfur and its discharge products,volume expansion,and other factors hinder the commercialization of lithium-sulfur batteries(LSBs).The development of sulfur-fixing materials and the design of multifunctional materials to enhance the electrochemical performance of LSBs have been the main research priorities in recent *** of the advantages of high conductivity,built-in electric field,and good synergism,more and more researchers have employed heterostructure into sulfur-fixing materials to enhance the catalytic and absorption ability for *** this review,the principle of heterostructure and the mechanism of enhancing the performance of lithium-sulfur batteries are *** applications of heterostructure in cathode and interlayer of LSBs in the latest years are ***,the cutting-edge troubles and possibilities of heterostructures in LSBs are briefly presented.

关键词： Lithium-sulfur batteries(LSBs) Heterostructure Built-in electric field Catalytic Absorption

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ZnO/ZnS heterostructure in N-doped porous carbon for anchoring-diffusion-conversion of polysulfides for high-performance lithium-sulfur batteries

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Rare Metals 2024年第8期43卷 3661-3676页

作者： Fei Wang Rong-Wei Huang Wen-Chang Han Chun-Man Yang Wen-Hao Yang Peng Dong Chao-Ling Wu Yi-Yong zhang Xue Li ying-jie zhang National Local Joint Engineering Research Center for LithiumIon Batteries and Materials Preparation Technology Key Laboratory of Advanced Batteries Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093China Engineering Research Center of Alternative Energy Materials and Devices Sichuan UniversityMinistry of EducationChengdu 610065China

The shuttle effect of polysulfides is one of the key factors hindering the commercialization of lithiumsulfur batteries(LSBs).Owing to their high conductivity and advantageous structure,heterostructures can be used in sulfur fixation and catalysis of *** this study,a flower-shaped ZnO/ZnS heterostructure on a nitrogendoped porous carbon(NPC) sulfur host was *** ZnO/ZnS heterostructure regulates the electronic structure of the material and exhibits higher metal-like ***,the ZnO/ZnS heterostructure combines the strong adsorption property of ZnO and the high catalytic ability of ZnS to realize the anchoring-diffusionconversion of lithium poly sulfides(LiPSs).Results reveal that the developed ZnO/ZnS@NPC/S cathode has excellent electrochemical performance in LSBs,achieving a high discharge specific capacity of 1365.3 mAh·g^(-1) at 0.1C and excellent rate capability(719 mAh·g^(-1) at 2C;the capacity decay rate is only 0.042% per cycle after 1000 cycles).Even under a high sulfur loading-E/S(electrolyte/sulfur)ratio of 5.1 mg·cm^(-2)-6 μl·mg^(-1),a high specific capacity of 723.7 mAh·g^(-1) is maintained after 60 *** study provides a new strategy for a multifunctional sulfur host that can effectively alleviate the shuttle effect of LiPSs and improve the utilization of sulfur active substances.

关键词： ZnO/ZnS heterostructure Lithium-sulfur batteries Density functional theory Anchor Conversion

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Mucosa color and size may indicate malignant transformation of chicken skin mucosa-positive colorectal neoplastic polyps

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World Journal of Gastrointestinal Oncology 2024年第3期16卷 750-760页

作者： ying-jie zhang Meng-Xia Yuan Wu Wen Fan Li Yi Jian Chuan-Ming zhang Ye Yang Feng-Lin Chen Department of Digestive Diseases Chengdu Second People’s HospitalChengdu 610000Sichuan ProvinceChina Graduate School Chengdu Medical CollegeChengdu 610000Sichuan ProvinceChina

BACKGROUND Lipid metabolism reprogramming is suspected to exist in pre-cancerous lesions,including colorectal *** colonoscopy frequently reveals chicken skin mucosa(CSM;white or yellow-white speckled mucosa)surrounding colo-rectal polyps,caused by macrophages engulfing and accumulating the lipids decomposed by colon cells or adjacent ***-positive colorectal polyps are associated with various diseases;however,their prognosis varies *** snare polypectomy is commonly used to resect lesions up to 10 to 15 mm in diameter without signs of submucosal invasion but is controversial for CSM-positive colorectal *** imaging is required to diagnose and treat CSM-positive colorectal *** This retrospective cohort study included 177 patients with CSM-positive colorectal polyps diagnosed using *** patient-related information was extracted from the Goldisc soft-clinic DICOM system or electronic medical record *** on the pathological results,patients were classified as non-neoplastic polyps(five juvenile polyps),neoplastic polyps,non-invasive high-grade neoplasia(NHGN),or submucosal invasive carcinoma(SM stage cancer).We analyzed and compared the clinical features,suspected risk factors for malignant transformation of neoplastic polyps,and early infiltration of sub-mucosal *** The diameters of NHGN and SM polyps were much smaller than those of neoplastic *** NHGN polyps had a deeper red mucosal *** logistic regression analyses,diameter and deeper red mucosal color were independent risk factors for malignant transformation of neoplastic *** 1 CSM was more common in high-grade intraepithelial neoplasia and SM;type 2 CSM was more common in neoplastic *** regression analyses revealed no significant differences in the malignant transformation of neoplastic polyps or early submucosal invasion of CSM-positive colorectal *** in the CSM mucosa surrounding neoplastic

关键词： Chicken skin mucosa Colorectal cancer Colorectal polyps Endoscopic resection Malignant transformation White light endoscopy

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Expression and significance of pigment epithelium-derived factor and vascular endothelial growth factor in colorectal adenoma and cancer

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World Journal of Gastrointestinal Oncology 2024年第3期16卷 670-686页

作者： Ye Yang Wu Wen Feng-Lin Chen ying-jie zhang Xiao-Cong Liu Xiao-Yan Yang Shan-Shan Hu Ye Jiang Jing Yuan Digestive Diseases Chengdu Qingbaijiang District People's HospitalChengdu 610300Sichuan ProvinceChina Digestive Diseases Chengdu Second People’s HospitalChengdu 610000Sichuan ProvinceChina Graduate School Chengdu Medical CollegeChengdu 610000Sichuan ProvinceChina

BACKGROUND The incidence and mortality of colorectal cancer(CRC)are among the highest in the world,and its occurrence and development are closely related to tumor *** the balance between pigment epithelium-derived factors(PEDF)that inhibit angiogenesis and vascular endothelial growth factors(VEGF)that stimulate angiogenesis is broken,angiogenesis is out of control,resulting in tumor ***,it is very necessary to find more therapeutic targets for CRC for early intervention and later *** To investigate the expression and significance of PEDF,VEGF,and CD31-stained microvessel density values(CD31-MVD)in normal colorectal mucosa,adenoma,and *** In this case-control study,we collected archived wax blocks of specimens from the Digestive Endoscopy Center and the General Surgery Department of Chengdu Second People's Hospital from April 2022 to October *** cases of specimen wax blocks were selected as normal intestinal mucosa confirmed by electronic colonoscopy and concurrent biopsy(normal control group),50 cases of specimen wax blocks were selected as colorectal adenoma confirmed by electronic colonoscopy and pathological biopsy(adenoma group),and 50 cases of specimen wax blocks were selected as CRC confirmed by postoperative pathological biopsy after inpatient operation of general surgery(CRC group).An immunohistochemical staining experiment was carried out to detect PEDF and VEGF expression in three groups of specimens,analyze their differences,study the relationship between the two and clinicopathological factors in CRC group,record CD31-MVD in the three groups,and analyze the correlation of PEDF,VEGF,and CD31-MVD in the colorectal adenoma group and the CRC *** F test or adjusted F test is used to analyze measurement data ***-Wallis rank sum test was used between groups for ranked *** chi-square test,adjusted chi-square test,or Fisher's exact test were used to compare the rates betwe

关键词： Pigment epithelium-derived factors Vascular endothelial growth factor Microvessel density Colorectal adenoma Colorectal cancer Targeted therapy

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Signature of Superconductivity in Pressurized La_(4)Ni_(3)O_(10)

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Chinese Physics Letters 2024年第1期41卷 77-84页

作者：李庆张英杰项浙宁张宇航祝熙宇闻海虎 National Laboratory of Solid State Microstructures and Department of Physics Center for Superconducting Physics and MaterialsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China

The discovery of high-temperature superconductivity near 80K in bilayer nickelate La_(3)Ni_(2)O_(7)under high pressures has renewed the exploration of superconducting nickelate in bulk *** extension of superconductivity in other nickelates in a broader family is also ***,we report the experimental observation of superconducting signature in trilayer nickelate La_(4)Ni_(3)O_(10)under high *** using a modified solgel method and post-annealing treatment under high oxygen pressure,we successfully obtained polycrystalline La_(4)Ni_(3)O_(10)samples with different transport behaviors at ambient *** we performed high-pressure electrical resistance measurements on these samples in a diamond-anvil-cell ***,the signature of possible superconducting transition with a maximum transition temperature(T_(c))of about 20K under high pressures is observed,as evidenced by a clear drop of resistance and the suppression of resistance drops under magnetic *** the resistance drop is sample-dependent and relatively small,it appears in all of our measured *** argue that the observed superconducting signal is most likely to originate from the main phase of La_(4)Ni_(3)O_(10).Our findings will motivate the exploration of superconductivity in a broader family of nickelates and shed light on the understanding of the underlying mechanisms of high-T_(c) superconductivity in nickelates.

关键词： materials superconductivity signature

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PARAMETRIC STUDY ON THE THRUST OF BUBBLY WATER RAMJET WITH A CONVERGING-DIVERGING NOZZLE

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Journal of Hydrodynamics 2009年第5期21卷 591-599页

作者： FU ying-jie WEI ying-jie zhang Jia-zhong School of Astronautics Harbin Institute of Technology Harbin 150001 China

To predict the thrust of bubbly water ramjet with a converging-diverging nozzle, the physical processes occurring in the diffuser, mixing chamber and nozzle were analyzed. The mathematical models were constructed separately under the restrictions of certain assumptions. The bubbly nozzle flow was examined using a two-fluid model and accomplished by specifying the water velocity distribution in the nozzle. The numerical analysis of flow field in the nozzle shows that the Mach number at the throat is 1.009, near unity, and supersonic bubble flow appears behind the throat. There is greater thrust produced by bubbly water ramjet, compared with single-phase air ramjets. Subsequently, the influences of vessel velocity, air mass flow rate, inlet area Ai, area ratio （i.e., mixing chamber to inlet area Am/Ai）, and initial bubble radius on the thrust were emphatically investigated. Results indicate that the thrust increases with the increase of air mass flow rate, inlet area and the area ratio, and the decrease of initial bubble radius. However, the thrust weakly depends on the vessel velocity. These analytical and numerical results are useful for further investigation of bubbly water ramjet engine.

关键词： bubbly water ramjet converging-diverging nozzle bubbly flow ramjet thrust numerical simulation

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Coherent-driving-assisted quantum speedup in Markovian channels

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Chinese Physics B 2021年第2期30卷 176-184页

作者： Xiang Lu ying-jie zhang Yun-jie Xia Shandong Provincial Key Laboratory of Laser Polarization and Information Technology Department of PhysicsQufu Normal UniversityQufu 273165China

As is well known,the quantum evolution speed of quantum state can never be accelerated in the Markovian regime without any operators on the *** Hamiltonian corrections induced by the action of coherent driving forces are often used to fight dissipative and decoherence mechanisms in *** this reason,considering three noisy channels(the phase-flip channel,the amplitude damping channel and the depolarizing channel),we propose a scheme of speedup evolution of an open system by controlling an external unitary coherent driving operator on the *** is shown that,in the presence of the coherent driving,no-speedup evolution can be transformed into quantum speedup evolution in the Markovian dynamics ***,under the fixed coherent driving strength in the above three noisy channels,the best way to achieve the most degree of quantum speedup for the system has been acquired by rotating the system with appropriate driving direction angles,***,we conclude that the reason for this acceleration is not the nonMarkovian dynamical behavior of the system but due to the oscillation of geometric distance between the initial state and the target final state.

关键词： quantum dynamics control quantum speed limit Markovian dynamics

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EXPERIMENTAL RESEARCH ON THE SHAPE CHARACTERS OF NATURAL AND VENTILATED SUPERCAVITATION

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Journal of Hydrodynamics 2007年第5期19卷 564-571页

作者： zhang Xue-wei WEI ying-jie zhang Jia-zhong WANG Cong YU Kai-ping School of Astronautics Harbin Institute of Technology Harbin 150001 China

A series of projectile and water-tunnel experiments were conducted to investigate the shape characters of natural and ventilated supercavitation. It was found that the shape and dimensions of both the natural supercavitation and the ventilated supercavitation are similar through the comparison of them when the cavitation number is small and equal, and the contour of both the natural supercavitation and the ventilated supercavitation can be calculated effectively with the Savchenko formula. The gravity effect can induce the asymmetry of ventilated supercavitation, and the asymmetry is more apparent as the Froude number is smaller. The empirical formula for calculating the axial deformation of ventilated supercavitation was corrected and expanded based on experiment data. The evolution rules of both the natural supercavitation and the ventilated supercavitation were described, and the vortex frequency of natural cavitation was obtained. In addition, the hysteretic aspect was observed between the development and the fall process of ventilated cavitation.

关键词： natural cavitation ventilated cavitation shapecharacters water tunnel experiment projectile experiment

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0.05% atropine on control of myopia progression in Chinese school children: a randomized 3-year clinical trial

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International Journal of Ophthalmology(English edition) 2023年第6期16卷 939-946页

作者： Qin Zhu Guang-Yong Tang Zhi-Juan Hua Li-Ping Xue Yuan Zhou jie-ying zhang ying-Ting Zhu Xiao-Fan zhang Department of Pediatric Ophthalmology Affiliated Hospital of Yunnan UniversityKunming 650021Yunnan ProvinceChina Department of Ophthalmology People’s Hospital of Xundian CountyKunming 655200Yunnan ProvinceChina BioTissue(Tissue Tech Inc.)Ocular Surface Centerand Ocular Surface Research&Education FoundationMiamiFL 33126USA

·AIM:To evaluate the effect of 0.05%atropine on the control of myopia for 2y(phase I)and on spherical equivalent refraction(SER)progression for 1y(phase II)after its withdrawal in Chinese myopic children.·METHODS:Totally 142 children with myopia were randomly assigned to the 0.05%atropine group or to the placebo *** phase I,children received 1 treatment for each eye *** phase II,the patients received no *** length(AL),SER,intraocular pressure(IOP)and atropine-related side effects were assessed at 6 months’intervals.·RESULTS:During phase I,the mean change of SER was-0.46±0.30 D in the atropine group,compared to-1.72±1.12 D in the placebo group(P0.05).Furthermore,the change in SER from the atropine group was 0.50±0.41 D,which was significantly lower than 0.72±0.60 D from placebo group,(P0.05).·CONCLUSION:The use of 0.05%atropine for two consecutive years may effectively control elongation of AL and thus progression of myopia,without significant SER progression 1y after atropine ***,treatment with 0.05%atropine daily for 2y is effective and safe.

关键词： atropine axial length spherical equivalent refraction children myopia

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Enhanced methanol oxidation activity of Au@Pd nanoparticles supported on MWCNTs functionalized by MB under ultraviolet irradiation

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Rare Metals 2015年第1期34卷 12-16页

作者： Ming-Li Xu Xi-Kun Yang ying-jie zhang Shu-Biao Xia Peng Dong Guo-Tao Yang Faculty of Science Kunming University of Science and Technology Research Center for Analysis and Measurement Kunming University of Science and Technology Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology

A successful approach to assemble Au core Pd shell （Au@Pd） nanoparticles on the surface of multi-walled carbon nanotubes functionalized by methylene blue （MB）（Au@Pd/fuv-MWCNTs） was reported. In this method, MWCNTs were functionalized under ultraviolet irradiation. UV-Vis analysis and high-angle annular dark-field trans- mission electron microscope （HAADF-TEM） image prove that core-shell structure of Au@Pd nanoparticles forms. TEM results indicate that Au@Pd nanoparticles （ - 5.2 nm） are well-dispersed on the surface of fuv-MWCNTs. X-ray photoelectron spectroscopy （XPS） reveals that ultraviolet irradiation can promote the interaction between Au@Pd nanoparticles and the functional groups on the surface of MWCNTs. Cyclic voltammograms （CV）, chronoampero- grams （CA）, and electrochemical impedance spectroscopy （EIS） results demonstrate that the Au@Pd/fuv-MWCNTs catalysts show excellent electrocatalytic performance for methanol oxidation in alkaline media. The catalytic activity of the Au@Pd/fuv-MWCNTs is ~ 2 times higher than that of the commercial Pd/C catalysts. This is mostly attributed to that ultraviolet irradiation can make the moieties of MB provide a uniform surface with active and anchoring sites, and improves the functional effect of MB on the surface of MWCNTs. Especially, ultraviolet irradiation modifies electronic structure of Pd and is beneficial for the enhance- ment of catalytic activity.

关键词： Au@Pd core-shell nanoparticle Multi-walledcarbon nanotube Methylene blue Electrocatalyst Methanol oxidation Ultraviolet irradiation

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