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Hollow cubic mns-CoS_(2)-NC@NC designed by two kinds of nitrogen-doped carbon strategy for sodium ion batteries with ultraordinary rate and cycling performance

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Nano Research 2022年第4期15卷 3273-3282页

作者： Ruipeng Wei Yutao Dong Yingying Zhang Xiyang Kang Xia Sheng Jianmin Zhang College of Science Henan Agricultural UniversityZhengzhou 450002China College of Chemistry Zhengzhou UniversityZhengzhou 450001China

In order to obtain an advanced anode material that exhibits excellent electrochemical performance in sodium ion batteries,a hollow nanocube mns-CoS_(2)-NC@NC(NC=nitrogen-doped carbon)with two kinds of nitrogen-doped carbon was synthesized by simple one-step *** of the two kinds of nitrogen-doped carbon comes from the organic ligands in the precursor being mixed in the sulfide after calcination,and the other comes from the calcination of the coated polydopamine(PDA)to form a carbon shell wrapped outside the *** characteristic nanostructure with two kinds of nitrogen-doped carbon can not only improve the overall conductivity of the electrode material,which is obviously beneficial to the rapid transmission of sodium ions and thus outstanding rate performance,but also can alleviate volume expansion to maintain battery cycle *** the half-cell,the mns-CoS_(2)-NC@NC electrode not only provides an ultra-high specific capacity of 608.5 mA·h·g^(-1)at 0.2 A·g^(-1)for 100 cycles,but also shows an outstanding rate performance of 560.5 mA·h·g^(-1)at 5.0 A·g^(-1)for 1,100 *** in a full-cell composed with Na3V2(PO4)3 as the positive material,it can still maintain a capacity of 436.7 mA·h·g^(-1)after 900 cycles at 1.0 A·g^(-1).In order to explore its sodium storage mechanism,in-situ and ex-situ X-ray diffraction(XRD)tests were carried out to prove that CoS_(2)and mns were reduced to produce metallic Co and metallic Mn during the discharging process,respectively,and reversibly returned during the charging process.

关键词： mns CoS_(2) hollow nanocube nitrogen-doped carbon sodium ion battery

High-temperature fracture behavior of mns inclusions based on GTN model

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Journal of Iron and Steel Research International 2019年第9期26卷 941-952页

作者： Xin-gang Liu Can Wang Qing-feng Deng Bao-feng Guo Key Laboratory of Advanced Forging and Stamping Technology and Science (Yanshan University) Ministry of Education of ChinaQinhuangdao 066004HebeiChina

The influence of the mns plastic inclusion on the accumulation of internal damage was considered, and the Gurson– Tvergaard–Needleman (GTN) model was calibrated based on the finite element inverse method and image analysis method using ABAQUS and GTN models. The modified GTN damage model was used to simulate the initiation and propagation of cracks in an as-cast 304 stainless steel with mns inclusions at 900 C. The simulation results agreed well with the experimental results, indicating that the model can be effectively applied to examine the high-temperature fracture behavior of mns inclusions. The simulation and high-temperature tensile test results revealed that mns inclusions increased the number of holes initiation and the probability of hole polymerization, reduced the crack propagation resistance, accelerated the occurrence of material fracture behavior, and were closely related to the stress state at high temperatures. When the stress triaxiality was low, the plastic strain in the metal matrix was high, and the mns plastic inclusions accelerated the polymerization of the pores, making metal fracture failure more likely. On the other hand, when the stress triaxiality was high, the stress state in the metal matrix was biased to the tensile state, the plastic strain in the metal matrix was low, and the influence of mns plastic inclusions on the fracture behavior was not evident.

关键词： mns inclusion GTN model Tension High-temperature fracture behavior Crack initiation Crack propagation Stress

MOF-derived Se doped mns/Ti_(3)C_(2)T_(x) as cathode and Zn-Ti_(3)C_(2)T_(x) membrane as anode for rocking-chair zinc-ion battery

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Nano Research 2024年第4期17卷 2781-2789页

作者： Kaisheng Sun Zemao Xiao Yunfei Shen Heng Lv Jianpeng Zhu Jianxiang Pang Yang Zheng Wenwen Kong Long Chen School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering Shihezi UniversityShihezi 832003China CAS Key Laboratory of Functional Materials and Devices for Special Environments Xinjiang Key Laboratory of Electronic Information Materials and DevicesCenter of Materials Science and Optoelectronics EngineeringXinjiang Technical Institute of Physics and Chemistry of CASUrumqi 830011China

Mn-based zinc ion battery has the advantages of low cost and high performance,which makes it the promising energy storage ***,the poor conductivity and the agglomeration in the synthesis process of manganese-based materials restrict the performance of ***,the Se-doped mns/Ti_(3)C_(2)T_(x)(Se-mns/Ti_(3)C_(2)T_(x))composite material derived from Mn-based metal-organic framework is *** tests show that Se-doped could generate S defects and enhance the electrochemical activity of *** the same time,the introduction of Ti_(3)C_(2)T_(x) substrate is conducive to exposing more sulfur defects and improving the utilization rate of *** the mechanism study,it is found that Se-mns/Ti_(3)C_(2)T_(x) is transformed into S/Se co-doped Mn3O_(4) at the first charge,which innovatively elucidated the behavior of S/Se during *** the electrochemical performance test,the specific capacity can reach 74.7 mAh·g^(-1) at 5.0 A·g^(-1).In addition,the Zn-Ti_(3)C_(2)T_(x) membrane electrode is prepared by vacuum filtration as the zinc-poor anode,which is assembled into the rocking chair full battery to avoid dendrite growth and exhibit excellent rate *** addition of Zn2+weakens the electrostatic repulsion between the interlayers of MXene,and the formation of the folded morphology aids the penetration of the *** 1.0 A·g^(-1),the capacity can reach 50.6 mAh·g^(-1).This work is helpful to promote the research and development of the reaction mechanism of manganese based rocking chair batteries.

关键词： rocking-chair zinc-ion battery mns Zn-Ti_(3)C_(2)T_(x) membrane Se doped Ti_(3)C_(2)T_(x) composite

Evolution of mns and MgO·Al_(2)O_(3) inclusions in AISI M35 steel during electroslag remelting

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Journal of Iron and Steel Research International 2021年第12期28卷 1605-1616页

作者： Ding-li Zheng Guo-jun Ma Xiang Zhang Meng-ke Liu Zhi Li Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking Wuhan University of Science and TechnologyWuhan430081HubeiChina State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan430081HubeiChina

Thermodynamics and kinetics of dissociation and precipitation of mns inclusions,as well as the effect of reoxidation in liquid steel on MgO·Al_(2)O_(3)inclusions in AISI M35 steel during electroslag remelting(ESR)process were *** inclusions found in the consumable electrode were mns,MgO·Al_(2)O_(3)and mns adhering to MgO·Al_(2)O_(3).mns inclusions were nearly spherical and ellipse in morphology,and most of them were less than 2μm in ***·Al_(2)O_(3)inclusions were polygonal and nearly spherical and most about 1-4μm in *** inclusions in ESR ingot observed by scanning electron microscopy-energy-dispersive X-ray spectrometer were polygonal and nearly spherical MgO·Al_(2)O_(3).mns inclusions in the consumable electrode were completely dissociated before the liquid film dripping into molten slag *** controlling step of mns inclusions dissociation was the mass transfer of[Mn]in the liquid *** the solidification process,the thermodynamic driving force could not meet mns inclusions precipitation before the solid fraction exceeds 0.996,and the kinetics condition is too poor for the growth of mns inclusions in the steel when the solid fraction is larger than ***·Al_(2)O_(3)inclusions in ESR ingot originated from the remained MgO·Al_(2)O_(3)inclusions in consumable electrode and the fresh ones formed by the reaction between dissolved magnesium,oxygen and aluminum in liquid steel.

关键词： Electroslag remelting Inclusion mns MgO·Al_(2)O_(3) AISI M35 steel

Characterization and Thermodynamics of Al_2O_3-MnO-SiO_2(-mns)Inclusion Formation in Carbon Steel Billet

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Journal of Iron and Steel Research International 2015年第7期22卷 566-572页

作者： Guo-cheng WANG Sheng-li LI Xin-gang AI Chong-min ZHANG Chao-bin LAI Key Laboratory of Chemical Metallurgy Engineering School of Materials and Metallurgy University of Science and Technology Liaoning School of Metallurgical and Chemical Engineering Jiangxi University of Science and Technology

A method to extract inclusion particles from solid steel by electrolysis with organic electrolyte solution was introduced; meanwhile, thermodynamics of inclusion formation was calculated using FaetSage software. The results showed that there were two kinds of inclusions in the billet, i.e. Al2O3-MnO-SiO2-mns （AMS-mns） and Al2O3- MnO-SiO2 （AMS）. Most of AMS-mns inclusion particles, with diameter of 10--30 μm, showed three-layer structures： SiO2-rich core with a small quantity of Mn, intermediate AMS layer, and mns outer layer containing small quanti- ties of A1 and O. Most AMS inclusion particles were 50--90 μm and exhibited homogeneous composition. Thermo- dynamic results indicated that SiO2-rich core could form firstly by Si reacting with O in molten steel at temperatures above 1 923 K during Si-Fe alloy addition, and then, the SiO2-rich core could react with Mn and Al to form liquid AMS enveloping the SiO2 rich core at 1823- 1873 K. mns began to precipitate from AMS when temperature reached 1 728 K. Liquid AMS could form by coupled reaction among Si, Mn, Al and O in molten steel.

关键词： Al2 O3-MnO-SiO2 mns extraction organic electrolyte solution thermodynamics

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mns hollow microspheres combined with carbon nanotubes for enhanced performance sodium-ion battery anode

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Chinese Chemical Letters 2020年第5期31卷 1221-1225页

作者： Na Zhang Xin Li Tianyi Hou Jinze Guo Anran Fan Shibo Jin Xiaohong Sun Shu Cai Chunming Zheng School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China State Key Laboratory of Hollow-fiber Membrane Materials and Membrane Processes School of Environmental and Chemical EngineeringTianjin Polytechnic UniversityTianjin 300387China

mns as anode material for sodium-ion batteries(SIBs)has recently attracted great attention because of the high theoretical capacity,great natural abundance,and low ***,it suffers from inferior electrical conductivity and large volume expansion during the charge/discharge process,leading to tremendous damage of electrodes and subsequently fast capacity *** mitigate these issues,herein,a three-dimensional(3D)interlaced carbon nanotubes(CNTs)threaded into or between mns hollow microspheres(hollow mns/CNTs composite)has been designed and synthesized as an enhanced anode *** can effectively improve the electrical conductivity,buffer the volume change,and maintain the integrity of the electrode during the charging and discharging process based on the synergistic interaction and the integrative ***,when evaluated as anode for SIBs,the hollow mns/CNTs electrode displays enhanced reve rsible capacity(275 mAh/g at 100 mA/g after 100 cycles),which is much better than that of pure mns electrode(25 mAh/g at 100 mA/g after 100 cycles)prepared without the addition of *** increasing the current density to 500 mA/g,the hollow mns/CNTs electrode still delivers a five times higher reversible capacity than that of the pure mns *** rate performance of the hollow mns/CNTs electrode is also superior to that of pure mns electrode at various current densities from 50 mA/g to 1000 mA/g.

关键词： mns CNTs Hollow microspheres Anode Sodium-ion battery

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Review on regulation of mns in non-qquenched and tempered steel

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Journal of Iron and Steel Research International 2024年第4期31卷 779-789页

作者： Guo-xing Qiu Qing Du Feng Lu De-jun Miao Yong-kun Yang Xiao-ming Li School of Metallurgical Engineering Xi'an University of Architecture and TechnologyXi'an 710055ShaanxiChina Laigang Technique Center Shandong Iron and Steel Group Co.Ltd.Jinan 271104ShandongChina

An overview of the current research status and control methods of mns in non-quenched and tempered steel was *** a low-melting plastic inclusion,the morphology and distribution of mns were influenced by various production ***,control of mns is a systematic problem that must be integrated into the entire production *** on the production process,the factors affecting the morphology and distribution of mns in steel were *** effects of oxygen activity,manganese,sulfur,and some alloys on mns inclusion precipitation were summarized,mainly including mns modification treatment and oxygen-sulfide composite precipitation *** is believed that mns precipitates during the solidification process of steel,and controlling the solidification cooling rate could effectively regulate the size and morphology of mns,avoiding the precipitation of ***,by changing the deformation rate,deformation amount,deformation temperature during the hot deformation process,and heating time and temperature during heat treatment,the distribution and morphology of mns could be *** the fine control of the above process parameters,the number of II-mns in steel could be effectively reduced,and their morphology could be improved,thereby enhancing the performance of non-quenched and tempered steel and promoting its wider ***,applying laboratory research results to industrial production is an important direction for future research efforts in this field.

关键词： mns Non-quenched and tempered steel Control technology Process parameter Morphology Distribution

Thermodynamic Calculation and mns Solubility of Mn-Ti Oxide Formation in Si-Mn-Ti Deoxidized Steel

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Journal of Iron and Steel Research International 2010年第2期17卷 10-16页

作者： ZHUO Xiao-jun WANG Yuan-qi WANG Xin-hua Lee Hae-geon Technology Management Section China Minmetals Corporation Beijing 100044 China Department of Scienee and Technology Information China Iron and Steel Research Institute Group Beijing 100081 China Metallurgieal and Ecological Engineering Sehool University of Science and Technology Beijing Beijing100083 China Graduate Institute of Ferrous Teehnology Pohang University of Science and TechnologyPohang 790-784 South Korea

Mn-Ti oxides in Si-Mn-Ti deoxidized steels after cooling in the furnace were investigated. The composition and morphology of inclusions were analyzed by using FE-SEM with EDS. Mn-Ti oxides were found to be effective sites to induce intragranular ferrite formation. The thermodynamic calculation was employed to interpret the critical condition for Mn-Ti oxide formation. Mn-Ti oxide formation was controlled not only by Mn and Ti content, but also by total oxygen content in steel. When the Mn and Ti contents were around 1.5% and 0. 005% --0.01%, respectively, Mn-Ti oxide could form as the total oxygen content was 0. 001%- 0. 002 %. The experimental results were in good agreement with thermodynamic calculation results. Also, mns solubilit：（ was examined in Mn-Ti oxide inclusion system. With an increase of MnO content in Mn-Ti oxide, mns solubility in the oxides increased. mns precipitation benefited from high MnO content in Mn-Ti oxide.

关键词： Si-Mn-Ti deoxided steel Mn-Ti oxide mns intragranular ferrite thermodynamic calculation

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Rational design of mns nanoparticles anchored on N,S-codoped carbon matrix as anode for lithium-ion batteries

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Progress in Natural Science:Materials International 2021年第5期31卷 649-655页

作者： Weiqin Li Mengyuan Yue Huinan Guo Zhaoxia Yuan Yafei Liu Kai Chen Juming Gu Yijing Wang Key Laboratory of Advanced Energy Materials Chemistry Ministry of Education Renewable Energy Conversion and Storage Center College of Chemistry Nankai University Quick Gem Optoelectronic S and T Co. Ltd.

The manganese sulfide(mns) has attracted more attention as anode material on energy storage and conversion field, owing to its high theoretical capacity(616 mA h g-1) and good electrochemical activity. However, low electronic conductivity and large volume expansion during charge-discharge processes have limited its further application. In order to address above mentioned problems, the composites, mns nanoparticles embedded in N,Scodoped porous carbon skeleton(named as mns/N,S–C composites), herein have been prepared successfully using metal organic framework(Mn-NTA) as template. The porous carbon skeleton not only can enhance electrode conductivity, but also relieve volume expansion during charge-discharge processes. Thus, the rational design towards electrode architectures has endowed mns/N,S–C nanocomposites with superior electrochemical performance, which delivers the specific capacities of 676.7 mA h g-1at the current density of 100 mA g-1.

关键词： N,S-codoped mns Nanocomposites Rods-like Lithium ion batteries