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Carbon-coated MoS_(2) nanosheets@CNTs-Ti_(3)C_(2) MXene quaternary composite with the superior rate performance for sodium-ion batteries

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Journal of Materials Science & Technology 2022年第5期100卷 101-109页

作者： Fengyi He cheng tang Yadong Liu Haitao Li Aijun Du Haijiao Zhang Institute of Nanochemistry and Nanobiology Shanghai UniversityShanghai 200444China School of Chemistry Physics and Mechanical EngineeringScience and Engineering FacultyQueensland University of TechnologyBrisbaneQLD 4001Australia

The exploration of advanced MoS_(2)-based electrode materials overcoming their inherent low conductivity and large volume changes is of importance for next-generation energy *** this work,we report a simple and high-efficient one-pot hydrothermal approach to prepare a unique and stable 1D/2D *** the architecture,ultrathin carbon layer-coated MoS_(2) nanosheets with large expanded interlayer of 1.02 nm are vertically grown onto the Ti_(3)C_(2) MXene and cross-linked carbon nanotubes(CNTs),giving rise to a highly conductive 3D *** interlayer expanded MoS_(2) nanosheets can greatly facilitate the Na ions/electrons ***,the N-doped 1D/2D CNTs-Ti_(3)C_(2) matrix can be used as a strong mechanical support to well relieve the large volume expansion upon *** a combination result of several advantages,the developed quaternary C-MoS_(2)/CNTs-Ti_(3)C_(2) composite anode shows an excellent sodium storage performance(562 mA h g^(-1) at 100 mA g^(-1) after 200 cycles)and rate capability(475 mA h g^(-1) at 2000 mA g^(-1)).The density functional theory calculations further prove that the full combination of layer-expanded MoS_(2) nanosheets and N-doped Ti_(3)C_(2) matrix can significantly enhance the adsorption energy of Na ions,further resulting in the enhancement of sodium storage capabilities.

关键词： MoS_(2)nanosheets Ti_(3)C_(2)MXene Quaternary composite Nitrogen doping Sodium-ion batteries

In-situ conversion growth of carbon-coated MoS_(2)/N-doped carbon nanotubes as anodes with superior capacity retention for sodium-ion batteries

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Journal of Materials Science & Technology 2022年第7期102卷 8-15页

作者： Yadong Liu cheng tang Weiwei Sun Guanjia Zhu Aijun Du Haijiao Zhang Institute of Nanochemistry and Nanobiology Shanghai UniversityShanghai 200444China School of Chemistry Physics and Mechanical EngineeringScience and Engineering FacultyQueensland University of TechnologyBrisbaneQLD 4001Australia School of Environmental and Chemical Engineering Shanghai UniversityShanghai 200444China

Layered structure MoS_(2) nanosheets have shown great potential for energy storage ***,the methodology for elaborately controllable growth of MoS_(2) onto carbonaceous matrix for promoting the electrochemical performance is highly ***,a high-effective,all-in-one in-situ conversion growth strategy has been proposed to construct a stable sandwich-type *** formation of the optimized C-MoS_(2)/NCNTs product undergoes a dissolution-recrystallization process,in which ultra-thin carbon layer-coated MoS_(2) nanosheets densely assembled onto the surface of polyimide(PI)derived N-doped carbon nanotubes(CNTs).Theoretical simulation reveals that MoS_(2) nanosheets possessing an expanded interlayer spacing of 0.92 nm can greatly reduce the barrier energy of Na ions ***-cordingly,the as-made C-MoS_(2)/NCNTs anode delivers superior cycling stability(82%capacity retention after 400 cycles at 1 A g^(−1))and rate performance(348 mAh g^(−1) at 2 A g^(−1)).The results demonstrate that the expanded MoS_(2) interlayer distance,ultrathin outer carbon coating,and N-doped CNTs matrix together accounts for the outstanding sodium storage capability for the C-MoS_(2)/NCNTs electrode.

关键词： MoS_(2)nanosheets In-situ conversion Carbon coating Expanded interlayer spacing Sodium-ion batteries

Effect of bariatric surgery on metabolism in diabetes and obesity comorbidity:Insight from recent research

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World Journal of Diabetes 2024年第4期15卷 586-590页

作者： Hui-Hong tang Dong Wang cheng-Chun tang Department of Cardiology Zhongda HospitalSoutheast UniversityNanjing 210009Jiangsu ProvinceChina School of Medicine Southeast UniversityNanjing 210009Jiangsu ProvinceChina

Obesity is a prevalent cause of diabetes mellitus(DM)and is a serious danger to human *** 2 DM(T2DM)mostly occurs along with *** obesity-induced DM is caused by an excessive long-term diet and surplus *** surgery can improve the symptoms of T2DM in some obese *** different types of bariatric surgery may have different *** are some models built by researchers to discuss the surgical procedures’effects on me-tabolism in diabetes animal models and diabetes *** is high time to conclude all this effects and recommend procedures that can better improve metabolism.

关键词： Bariatric surgery Obesity Diabetes Animal models Diabetes patients

Flame-retardant ammonium polyphosphate/MXene decorated carbon foam materials as polysulfide traps for fire-safe and stable lithium-sulfur batteries

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Journal of Energy Chemistry 2024年第2期89卷 313-323,I0008页

作者： Yang Li Yong-cheng Zhu Sowjanya Vallem Man Li Seunghyun Song Tao Chen Long-cheng tang Joonho Bae Department of Physics Gachon UniversitySeongnam-siGyeonggi-do 13120South Korea Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education College of MaterialChemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou 311121ZhejiangChina Key laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China School of Materials Engineering Changzhou Vocational Institute of Industry TechnologyChangzhou 213164JiangsuChina

Lithium-sulfur(Li-S)batteries are one of the most promising modern-day energy supply systems because of their high theoretical energy density and low ***,the development of high-energy density Li-S batteries with high loading of flammable sulfur faces the challenges of electrochemical performance degradation owing to the shuttle effect and safety issues related to fire or explosion *** this work,we report a three-dimensional(3D)conductive nitrogen-doped carbon foam supported electrostatic self-assembled MXene-ammonium polyphosphate(NCF-MXene-APP)layer as a heat-resistant,thermally-insulated,flame-retardant,and freestanding host for Li-S batteries with a facile and costeffective synthesis ***,through the use of NCF-MXene-APP hosts that strongly anchor polysulfides,the Li-S batteries demonstrate outstanding electrochemical properties,including a high initial discharge capacity of 1191.6 mA h g^(-1),excellent rate capacity of 755.0 mA h g^(-1)at 1 C,and long-term cycling stability with an extremely low-capacity decay rate of 0.12%per cycle at 2 *** importantly,these batteries can continue to operate reliably under high temperature or flame attack ***,this study provides valuable insights into the design of safe high-performance Li-S batteries.

关键词： Flame-retardant MXene Ammonium polyphosphate Safety Lithium-sulfur battery

Effective exposure of nitrogen heteroatoms in 3D porous graphene framework for oxygen reduction reaction and lithium–sulfur batteries

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Journal of Energy Chemistry 2018年第1期27卷 167-175页

作者： Jia-Le Shi cheng tang Jia-Qi Huang Wancheng Zhu Qiang Zhang Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Advanced Research Institute for Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China Department of Chemical Engineering Qufu Normal UniversityQufu 273165ShandongChina Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China CAS Key Laboratory of Carbon Materials.Institute of Coal Chemistry Chinese Academy of SciencesTaiyuan 030001ShanxiChina

The introduction of nitrogen heteroatoms into carbon materials is a facile and efficient strategy to regulate their reactivities and facilitate their potential applications in energy conversion and storage. However,most of nitrogen heteroatoms are doped into the bulk phase of carbon without site selectivity, which significantly reduces the contacts of feedstocks with the active dopants in a conductive scaffold. Herein we proposed the chemical vapor deposition of a nitrogen-doped graphene skin on the 3D porous graphene framework and donated the carbon/carbon composite as surface N-doped grapheme（SNG）. In contrast with routine N-doped graphene framework（NGF） with bulk distribution of N heteroatoms, the SNG renders a high surface N content of 1.81 at%, enhanced electrical conductivity of 31 S cm^（-1）, a large surface area of 1531 m^2 g^（-1）, a low defect density with a low I_D/I_G ratio of 1.55 calculated from Raman spectrum, and a high oxidation peak of 532.7 ℃ in oxygen atmosphere. The selective distribution of N heteroatoms on the surface of SNG affords the effective exposure of active sites at the interfaces of the electrode/electrolyte, so that more N heteroatoms are able to contact with oxygen feedstocks in oxygen reduction reaction or serve as polysulfide anchoring sites to retard the shuttle of polysulfides in a lithium–sulfur battery. This work opens a fresh viewpoint on the manipulation of active site distribution in a conductive scaffolds for multi-electron redox reaction based energy conversion and storage.

关键词： Nitrogen-doped graphene Chemical vapor deposition Oxygen reduction reaction Lithium-sulfur battery Porous carbon materials Exposure of active sites

Potential for Constraining Propagation Parameters of Galactic Cosmic Rays with the High Energy Cosmic-radiation Detection Facility on Board China's Space Station

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Research in Astronomy and Astrophysics 2023年第8期23卷 290-296页

作者： Zhi-Hui Xu Qiang Yuan Zhi-cheng tang Xiao-Jun Bi Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Precise measurements of the spectra of secondary and primary cosmic rays are crucial for understanding the origin and propagation of those energetic *** High Energy Cosmic-radiation Detection(HERD)facility on board China's Space Station,which is expected to operate in 2027,will push the direct and precise measurements of cosmic-ray fluxes up to PeV *** this work,we investigate the potential of HERD for studying the propagation of cosmic rays using measurements of boron,carbon,and oxygen *** find that,compared with the current results,the new HERD measurements can improve the accuracy of the propagation parameters by 8%–40%.The constraints on the injection spectra at high energies will also be improved.

关键词： (ISM:)cosmic rays-instrumentation detectors-The Galaxy

Vanadium-based compounds and heterostructures as functional sulfur catalysts for lithium-sulfur battery cathodes

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Journal of Energy Chemistry 2023年第11期86卷 118-134,I0003页

作者： Xinji Dong Qiao Deng Fengxing Liang Pei Kang Shen Jinliang Zhu cheng tang School of Resources Environment and MaterialsState Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite StructuresGuangxi UniversityNanning 530004GuangxiChina Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

Lithium-sulfur(Li-S)batteries have attracted wide attention for their high theoretical energy density,low cost,and environmental ***,the shuttle effect of polysulfides and the insulation of active materials severely restrict the development of Li-S *** conductive sulfur scaffolds with catalytic conversion capability for cathodes is an efficient approach to solving above ***-based compounds and their heterostructures have recently emerged as functional sulfur catalysts supported on conductive *** compounds interact with polysulfides via different mechanisms to alleviate the shuttle effect and accelerate the redox kinetics,leading to higher Coulombic efficiency and enhanced sulfur *** on vanadium-based nanomaterials in Li-S batteries have been steadily increasing over the past several *** this review,first,we provide an overview of the synthesis of vanadium-based compounds and ***,we discuss the interactions and constitutive relationships between vanadium-based catalysts and polysulfides formed at sulfur *** summarize the mechanisms that contribute to the enhancement of electrochemical performance for various types of vanadium-based catalysts,thus providing insights for the rational design of sulfur ***,we offer a perspective on the future directions for the research and development of vanadium-based sulfur catalysts.

关键词： Vanadium-based compound Vanadium-based heterostructure Lithium-sulfur battery Sulfur catalyst Polysulfide regulation

Core-branch Co Ni hydroxysulfides with versatilely regulated electronic and surface structures for superior oxygen evolution electrocatalysis

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Journal of Energy Chemistry 2019年第11期28卷 8-14页

作者： Bin Wang cheng tang Hao-Fan Wang Xiao Chen Rui Cao Qiang Zhang Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China School of Chemistry and Chemical Engineering Shaanxi Normal UniversityXi’an 710119ShaanxiChina School of Chemical Engineering The University of AdelaideAdelaideAustralia AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory(ChEM-OIL) National Institute of Advanced Industrial Science and Technology(AIST)YoshidaSakyo-kuKyoto 606-8501Japan

To satisfy the rapid development of gas-involving electrocatalysis(O2, CO2, N2, etc.), nanostructured electrocatalysts with favorably regulated electronic structure and surface nanostructures are urgently required. Herein, we highlighted a core-branch hydroxysulfide as a significantly enhanced oxygen evolution reaction electrocatalyst. This hydroxysulfide was facilely fabricated via a versatile interfacial reaction in S2- inorganic solution at room temperature for a designed period. The moderative growth kinetics contributed to the growth of interconnected hydroxysulfide nanosheets with high-sulfur contents on the hydroxide precursor substrates, resulting in a hierarchical nanostructure with multifunctional modifications, including regulated electronic structure, rapid electron highway, excellent accessibility, and facilitated mass transfer. Such synthetic methodology can be generalized and facilely governed by regulating the temperature, concentration, duration, and solvent for targeted nanostructures. Contributed to the favorably regulated electronic structure and surface nanostructure, the as-obtained core-branch Co2NiS2.4(OH)1.2 sample exhibits superior OER performance, with a remarkably low overpotential(279 m V required for 10.0 m A c^m-2), a low Tafel slope(52 m V dec^-1), and a favorable long-term stability. This work not only presents a promising nanostructured hydroxysulfide for excellent OER electrocatalysis, but also shed fresh lights on the further rational development of efficient electrocatalysts.

关键词： Oxygen evolution reaction Hydroxysulfides Anion regulation Interfacial reaction Hierarchical structure

Safety and effectiveness of butorphanol in epidural labor analgesia:A protocol for a systematic review and meta-analysis

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World Journal of Clinical Cases 2024年第8期12卷 1416-1421页

作者： Guan-cheng tang Man He Zhen-Zhao Huang Yan cheng Department of Anesthesiology Yongkang Hospital of Traditional Chinese MedicineJinhua 321301Zhejiang ProvinceChina Department of Gynecology and Obstetrics Yongkang Hospital of Traditional Chinese MedicineJinhua 321301Zhejiang ProvinceChina Department of Anesthesiology Hangzhou United Liger Sixth Medical Beauty HospitalHangzhou 311215Zhejiang ProvinceChina Department of Ultrasound Hangzhou Women’s HospitalHangzhou 310008Zhejiang ProvinceChina

BACKGROUND Epidural analgesia is the most effective analgesic method during *** administered epidurally has been shown to be a successful analgesic method during ***,no comprehensive study has examined the safety and efficacy of using butorphanol as an epidural analgesic during *** To assess butorphanol's safety and efficacy for epidural labor *** The PubMed,Cochrane Library,EMBASE,Web of Science,China National Knowledge Infrastructure,and Google Scholar databases will be searched from *** types of literature,such as conference abstracts and references to pertinent reviews,will also be *** will include randomized controlled trials comparing butorphanol with other opioids combined with local anesthetics for epidural analgesia during *** will be no language *** primary outcomes will include the visual analog scale score for the first stage of labor,fetal effects,and Apgar *** independent reviewers will evaluate the full texts,extract data,and assess the risk of *** bias will be evaluated using Egger's or Begg's tests as well as visual analysis of a funnel plot,and heterogeneity will be evaluated using the Cochran Q test,P values,and I2 ***-analysis,subgroup analysis,and sensitivity analysis will be performed using RevMan software version *** protocol was developed in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses(PRISMA)Protocols statement,and the PRISMA statement will be used for the systematic *** This study provides reliable information regarding the safety and efficacy of using butorphanol as an epidural analgesic during *** To support clinical practice and development,this study provides evidence-based findings regarding the safety and efficacy of using butorphanol as an epidural analgesic during labor.

关键词： Epidural analgesia during labor Butorphanol Safety Protocol Meta-analysis