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Numerical Analysis of Explosion Characteristics of Vent Gas From 18650 liFePO_(4) Batteries With Different States of Charge

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电化学（中英文） 2024年第8期30卷 28-35页

作者： Shi-lin Wang Xu Gong li-na liu Yi-Tong li Chen-Yu Zhang Le-Jun Xu Xu-Ning Feng Huai-Bin Wang China People's Police University Langfang 065000China State Key Laboratory of Automotive Safety and Energy Tsinghua University Beijing 100084China

The combustion and explosion characteristics of lithium-ion battery vent gas is a key factor in determining the fire hazard of lithium-ion *** the combustion and explosion hazards of lithium-ion batteries vent gas can provide guidance for rescue and protection in explosion accidents in energy storage stations and new energy vehicles,thereby promoting the application and development of lithium-ion *** on this understanding and combined with previous research on gas production from lithium-ion batteries,this article conducted a study on the combustion and explosion risks of vent gas from thermal runaway of 18650 LFP batteries with different states of charge(SOCs).The explosion limit of mixed gases affected by carbon dioxide inert gas is calculated through the“elimination”method,and the Chemkin-Pro software is used to numerically simulate the laminar flame speed and adiabatic flame temperature of the battery vent *** the concentration of free radicals and sensitivity coefficients of major elementary reactions in the system are analyzed to comprehensively evaluate the combustion explosion hazard of battery vent *** study found that the 100%SOC battery has the lowest explosion limit of the vent *** inhibitory elementary reaction sensitivity coefficient in the reaction system is lower and the concentration of free radicals is ***,it has the maximum laminar flame speed and adiabatic flame *** combustion and explosion hazard of battery vent gas increases with the increase of SOC,and the risk of explosion is the greatest and most harmful when SOC reaches 100%.However,the related hazards decrease to varying degrees with overcharging of the *** article provides a feasible method for analyzing the combustion mechanism of vent gas from lithium-ion batteries,revealing the impact of SOC on the hazardousness of battery vent *** provides references for the safety of storage and transportation of lithium

关键词： Combustion and explosion characteristics Explosion limit Laminar flame speed Adiabatic flame temperature Sensitivity analysis

Effect of Soda Ash on Properties of Mold Flux and Mineralogical Structures of Flux Film

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Journal of Iron and Steel Research International 2016年第3期23卷 197-202页

作者： Xiu-li HAN Yi-fei ZHANG Lei liu li-na liu Han ZHANG College of Mining Engineering North China University of Science and Technology

During continuous casting,properties of mold flux and mineralogical structures of flux film play important roles in controlling steel *** effect of soda ash on the physical properties and crystallization characteristics of mold flux was investigated using process mineralogy,including polarizing microscopy,X-ray diffraction,and electron microprobe,*** flux was mainly prepared using cement clinker and industrial mineral materials under laboratory conditions,and the mineralogical structures of the flux film were systematically identified and quantitatively *** results showed that,by increasing the soda ash content from 10mass% to 18mass%,the crystallization temperature,critical cooling rate and crystallization ratio of the flux film decreased,but the crystallization ratio still reached 75% after adding soda ash,and the mineral compositions and microstructures of the flux film changed *** the soda ash content exceeded 14mass%,the critical cooling rate and the crystallization ratio decreased slightly,whereas the mineral content of the flux film changed evidently,with a large amount of cuspidine precipitation and a significant decrease in the wollastonite content until it reached zero,which resulted in deterioration of the lubrication of the flux film.

关键词： soda ash mold flux flux film crystallization property mineralogical structure

Complete mitochondrial genome of yellow meal worm （Tenebrio molitor）

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Zoological Research 2014年第6期35卷 537-545页

作者： li-na liu Cheng-Ye WANG State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoology Chinese Academy of Sciences Kunming 650223 China Key Laboratory of Cultivating and Utilization of Resource Insects of State Forestry Administration Research Institute of Resource lnsects Chinese Academy of Forestry Kunming 650224 China

The yellow meal worm （Tenebrio molitor L.） is an important resource insect typically used as animal feed additive. It is also widely used for biological research. The first complete mitochondrial genome of T. rnolitor was determined for the first time by long PCR and conserved primer walking approaches. The results showed that the entire mitogenome of T. molitor was 15 785 bp long, with 72.35% A＋T content [deposited in GenBank with accession number KF418153]. The gene order and orientation were the same as the most common type suggested as ancestral for insects. Two protein-coding genes used atypical start codons （CTA in ND2 and AAT in COX1）, and the remaining 11 protein-coding genes started with a typical insect initiation codon ATN. All tRnas showed standard clover-leaf structure, except for tRnaSer （AGN）, which lacked a dihydrouridine （DHU） arm. The newly added T. molitor mitogenome could provide information for future studies on yellow meal worm.

关键词： Tenebrionidae Mitogenome Evolution Resource insect Yellow meal worm

Solidification Structure of Low Carbon Steel Strips with Different Phosphorus Contents Produced by Strip Casting

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Journal of Materials Science & Technology 2006年第6期22卷 755-758页

作者： na li Zhenyu liu Yiqing QIU Zhaosen liN Xianghua liu Guodong WANG State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 China

In the present paper, low carbon steel strips with different phosphorus contents were produced using a twin roll strip casting process. The solidification structure was studied and its features were analyzed in detail. It was found that the strips possessed a fine microstructure compared with the mould cast steels. With increasing phosphorus content more ferrite has been formed with finer grains.

关键词： Phosphorus Solidification structure Strip casting Low carbon steel

Microstructure and Properties of 7075Al Alloy Fabricated by Directly Combined of Spray Forming and Continuous Extrusion Forming under Different Atomization Gas Pressures

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Acta Metallurgica Sinica(English Letters) 2016年第9期29卷 804-812页

作者： Ye-Gao Chen Yi Zhong Jiang-Cheng Yin li-Qiang Wang li-na liu Huan Yang Ying-li liu Faculty of Materials Science and Engineering Kunming University of Science and Technology

A new process consisting of the spray forming and the continuous extrusion forming for manufacturing 7075A1 alloy was proposed. The microstructure evolution, mechanical properties and the resistance to stress corrosion cracking of the alloy were studied. The results indicate that the spray forming process induces obviously grain refinement and greatly lower segregation microstructure. Besides, the Conform process produces finer grains and conduces to more uniform distribution of the precipitates of A1Cu and MgZn2 phases. The fabricated alloy shows good comprehensive mechanical properties and superb performance of stress corrosion resistance. Moreover, a better combination of the mechanical properties and the resistance to stress corrosion cracking could then be obtained under a certain condition of atomization gas pressure of 0.19 MPa. The enhanced properties are attributed to the following factors, which include the grain refinement, the fine and homogeneous distribution of A1Cu and MgZn2 phases, the high density of the extruded products, as well as the discontinuous distribution of the grain boundaries after retrogression and reaging （RRA） heat treatment.

关键词： 7075A1 alloy Spray forming Continuous extrusion forming Microstructure Property

Microencapsulation of dodecyl acetate by complex coacervation of whey protein with acacia gum and its release behavior

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Chinese Chemical Letters 2012年第7期23卷 847-850页

作者： You Tong Yu li na liu Xiao li Zhu Xiang Zheng Kong College of Chemistry and Chemical Engineering University of JinanJinan 250022China

Complex coacervation of whey protein（WP） with acacia gum（AG） was carried out in water with the presence of dodecyl acetate （DA）,a component of insect sex pheromones,in order to obtain microcapsules with DA as the core material and WP-AG coacervate as the wall *** variations in wall/core ratios,concentrations of the wall materials in capsule preparations,DA encapsulation was optimized,which showed a high DA encapsulation was achieved when coacervation was conducted at pH 3.5 with wall/core mass ratio at 3 combined with concentration of wall materials at 1.0 wt%.Morphology and the structure of DA loaded microcapsules were examined by scanning electron microscope,which showed the microcapsules were of core/shell structure with DA encapsulated in the inner of the *** release was examined and the behavior of the release was discussed.

关键词： Whey protein Acacia gum Complex coacervation Insect pheromone encapsulation Controlled release

Improving Both Electron and Hole Mobilities of an Ambipolar Polymer by Integrating Sodium Sulfonate-Tethered Alkyl Side Chains

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Chinese Journal of Chemistry 2020年第12期38卷 1663-1670页

作者： li-na liu Yun-Peng li Maria Khalil Zi-Wen Xu Guanghui Xie Xingmin Zhang Jingjing li Wei-Shi li Key Laborstory of Synthetic and Self-assembly Chemistry for Orgonic Functional Molecules Center for Excellence in Molecular Synthesisshanghailnsti-tute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Acodemy of sciences345 Lingling RoodSshanghai 200032China Engineering Research Center of henghou for High Performance Organic Functional Moterials Zhengzhou Institute of Technology6 Yingcai treetHuiji DistrictZhengzhouHenan 450044China Shanghai ynchrotron Radiation Facility Shanghai Advanced Research insituteChinese Acodemy of Sciences239 Zhangheng RoadPudong DistricShanghai 201204China

of main observation and conclusion High performance ambipolar organic semiconductors are highly desirable for organic logic ***,we demonstrate the integration of sodium sulfonate(SS)-tethered sidechains into a diketopyrrolopyrrole-based ambipolar polymer(PDPP3T)can simultaneously improve its hole and electron transport performances either parallel or perpendicular to polymer *** SS-functionalized polymers(PDPP3T-XSS,x=0.025,0.05 and 0.10)were synthesized and *** was found that SS functionalization can reinforce interchain n-Ti interactions,slightly lower frontier orbital energy levels,produce more rod-like structures in film,and change chain-packing from edge-on to face-on fashion,but has little influence on thermal *** interestingly,organic field-effect transistors reported hole mobility of 0.27±0.066 cm^2.V^-1·s^-1 and electron mobility of 0.038±0.016 cm^2.V^-1·s^-1 for PDPP3T,while increased 2.4 and 5 folds to 0.64±0.087 and 0.19±0.051 cm^2.V^-1·s^-1 for PDPP3T-0.025SS,***,PDPP3T-xSS devices displayed reduced threshold voltages for both hole and electron ***,space charge-limited current method found SS functionalization achieved an order of magnitude increase in electron mobility and slight enhancement in hole mobility transporting perpendicular to polymer ***-depth investigations suggest such enhancements may originate from the joint actions of chain-stacking modulation and ionic doping effect.

关键词： properties. effect. film.

Tuning Acceptor Length in Photocatalytic Donor-Acceptor Conjugated Polymers for Efficient Solar-to-Hydrogen Energy Conversion

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Chinese Journal of Chemistry 2022年第20期40卷 2457-2467页

作者： Qian li Jia li Wen-Rui Wang li-na liu Zi-Wen Xu Guanghui Xie Jingjing li Jianhua Yao Wei-Shi li The Education Ministry Key Laboratory of Resource Chemistry Shanghai Normal UniversityShanghai200234 China CAS Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules ShanghaiInstitute of Organic ChemistryChinese Academy of Sciences345 Lingling RoadShanghai200032 China CAS Key laboratory of Energy Regulation Materials Shanghai Institute of Organic ChemistryChinese Academy of Sciences345 Lingling RoadShanghai200032 China Engineering Research Center of Zhengzhou for High Performance Organic Functional Materials Zhengzhou University of Technology6 Yingcai StreetHuiji DistrictZhengzhouHenan450044 China

The development of conjugated polymer photocatalysts for efficient solar-to-hydrogen energy conversion is highly desirable for the sustainability of our *** the construction of donor-acceptor(D-A)structure in conjugated polymer photocatalysts for solar-to-hydrogen energy conversion has been well documented,less attention has been paid on how large D and how large A units combined together could achieve the best ***,a series of D-A copolymers P(BDT-DBTSOx)(x=7,19,39,and 79)composed of a benzodithiophene(BDT)donor unit and an oligomeric dibenzo[b,d]thiophene sulfone(DBTSO)acceptor segment were synthesized and *** was found that the polymer photocatalytic stabilities under full-arc irradiation improved upon shortening the length of the acceptor *** visible light irradiation and in the presence of 3 wt%Pt cocatalyst,P(BDT-DBTSO79)displayed the best performance with an optimal hydrogen evolution rate of 119.3±5.8 mmol·g^(-1)·h^(-1).This is 1.4-fold as that of DBTSO homopolymer and 22.5-fold as that of BDT/DBTSO alternative copolymer,highlighting the importance of acceptor length in D-A structure for achieving high photocatalytic performance.

关键词： Photocatalysis Water splitting Solar-to-hydrogen energy conversion Conjugated polymers Donor-acceptor systems

Epidemiologically characteristics of human brucellosis and antimicrobial susceptibility pattern of Brucella melitensis in Hinggan League of the Inner Mongolia Autonomous Region,China

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Infectious Diseases of Poverty 2020年第3期9卷 146-147页

作者： Hai-Tao Yuan Cheng-ling Wang li-na liu Dan Wang Dan li Zhen-Jun li Zhi-Guo liu Hinggan League Center for Disease Control and Prevention Ulanhot 137400China 不详

Background:Hinggan League is located in the Northeast of the Inner Mongolia Autonomous Region,the historically endemic area of animal and human *** this study,the epidemiological characteristics of human brucellosis were analyzed,and the genotypic profile and antimicrobial susceptibilities of Brucella melitensis strains isolated from humans in Hinggan League were ***:The epidemic characteristics were described using case number,constituent ratio,and *** 418 human blood samples were collected and tested by bacteriology,and suspect colonies were isolated and identified by conventional biotyping assays,the VITEK 2.0 microbial identification system,and AMOS(Brucella abortus,***,***,and ***)-***,all strains were genotyped using multiple-locus variable-number tandem repeat analysis(MLVA)assays,and the antimicrobial susceptibility pattern of Brucella strains against the 10 most commonly used antibiotics was determined by microdilution ***:A total of 22848 cases of human brucellosis were reported from 2004 to 2019,with an annual average incidence of 87.2/*** incidence rates in developed areas of animal husbandry(Horqin Youyi Qianqi[161.2/100000]and Horqin Youyi Zhongqi[112.1/100000])were significantly higher than those in forest areas(Arxan[19.2/100000])(χ2=32.561,P<0.001).In addition,peak morbidity occurred during May–August,accounting for 72.6%(16582/22848)of *** highest number of cases occurred in the 40+age group,accounting for 44.4%(10137/22484)of cases,and morbidity in males was significantly higher than that in females in all age groups(χ2=299.97,P<0.001),the most common occupation was farmers.A total of 54 *** strains were divided into 37 genotypes(GT1–37)with 80–100%genetic *** 25 strains were sensitive to seven tested antibiotics,phenotypic resistance to cotrimoxazole and azithromycin was observed in 5(20%)and 25(100%)of the isolates,***:Hu

关键词： Brucellosis Epidemiology characteristic Brucella melitensis Genotyping Antimicrobial susceptibility Hinggan league Inner Mongolia Autonomous Region