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Paraffin/SiC as a Novel co.posite Phase-Change Material for a Lithium-Ion battery Thermal Management System

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Transactions of tianjin University 2021年第1期27卷 55-63页

作者： Wei Kang Yiqiang Zhao Xueheng Jia Lin Hao Leping Dang Hongyuan Wei School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China tianjin lishen battery joint-stock co. LtdTianjin 300072China

A lithium-ion battery thermal management system has always been a hot spot in the battery industry. In this study, a novel high-thermal-co.ductivity co.posite phase-change material(CPCM) made by paraffin wax and silico. was adopted to facilitate heat transfer. Moreover, high resistance or even insulation of CPCM is capable of preventing short circuits between the cells. The heat transfer mechanism of CPCMs was determined under a scanning electron microsco.e. A thermogravimetric analyzer was employed to determine the thermal stability. A diff erential scanning calorimeter was used to explore the thermophysical properties of the co.posite samples. By co.paring the results of the experiment, it was reported that under the silico. carbide co.tent of 5%, the parameters were better than others. The phase-change enthalpy of CPCM was 199.4 J/g, the leakage rate of liquid was 4.6%, and the melting point was 53.6℃. To verify the practicality of CPCM, a three-dimensional layered battery pack model was built in the co.SOL Multiphysics software. By simulating the thermal runaway inside the battery packs of various materials, it was reported that the addition of CPCM significantly narrowed the temperature range of the battery pack from 300–370 to 303–304 K. Therefore, CPCM can eff ectively increase the rate of heat transfer to prevent the chain of thermal runaway reactions. It also enables the battery pack to run at a stable temperature.

关键词： Lithium-ion battery Phase-change material Paraffin Silico. carbide Thermal runaway

Influence of carbon sources on the performance of carbon-co.ted nano-silico.

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Chinese Physics B 2023年第10期32卷 689-694页

作者：王琳李娜陈浩森宋维力 Technology Beijing Institute of TechnologyBeijing 100081China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China tianjin lishen battery joint-stock co. LtdTianjin 300384China

Silico.-based material is an important anode material for next-generation lithium-ion *** order to overco.e its shortco.ings,carbon co.ting is often employed to improve the electrochemical ***,the carbon source,carbon co.tent,and different co.tact and mixing schemes between carbon sources and silico. are all co.plex factors and need to be *** this study,nano-silico. is co.ted by the chemical vapor deposition method using different carbon sources,such as acetylene,methane,propane,and *** co.tent after co.ting is designed to stay at the same level to reduce the experimental *** show the sample with higher co.ductivity provides higher cycle *** is the best choice of the four carbon sources studied in this *** results indicate that the selection of the carbon source is an important factor that plays a significant role in electrochemical performance.

关键词： silico. carbon co.ted different carbon sources lithium-ion battery

Fluorinated graphite nanosheets for ultrahigh-capacity lithium primary batteries

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Rare Metals 2021年第7期40卷 1708-1718页

作者： Xiao-Xia Yang Guan-Jun Zhang Bao-Sheng Bai Yu Li Yi-Xiao Li Yong Yang Xian Jian Xi-Wen Wang tianjin lishen Special Power Supply Science and Technology joint-stock co. Tianjin 300393China tianjin lishen battery joint-stock co. LtdTianjin 300384China School of Materials Science and Engineering Tianjin UniversityTianjin 300354China State Key Laboratory for Physical Chemistry of Solid Surface Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China

For better performances of Ni-based catalysts at low temperatures,Ni/SiC catalyst doped with a little amount of additive La was successfully *** catalytic co.methanation activity tests showed that 3%La-Ni/SiC catalyst was excellent at a low reaction temperature(95.9%co.co.version and 85.1%CH4 selectivity at250℃)with a superior stability co.pared with Ni/SiC(3.4%co.co.version and 0%CH4 selectivity at 250℃).This can be attributed to that the addition of La can markedly improve the dispersibility of active metal Ni and reduce the particle sizes of Ni nanoparticles or clusters,and can also regulate the interaction between active co.ponents and ***,the high thermal co.ductivity and thermal stability co.ld avoid the generation of hot spots in the catalyst *** results will promote the development of highly active Ni-based catalysts for the low-temperature methanation reaction.

关键词： Graphite nanosheets Carbon fluoride Primary battery Electrolyte Soft pack battery

Optimized Method for Real-time Texture Reco.struction with RGB-D Camera

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Transactions of tianjin University 2017年第5期23卷 493-500页

作者： Yonghong Hou Hang Li Chuankun Liu Liang Zhang School of Electrical and Information Engineering Tianjin University tianjin lishen battery joint-stock co. Ltd tianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology School of Electrical Engineering and Automation Tianjin Polytechnic University

With the appearance of RGB-D camera, the field of three-dimensional (3D) reco.struction receives more and more attention. In this paper, we present an optimization approach to produce high-quality textured 3D models based on the real-time 3D reco.struction system. The resulting models of real-time texture reco.struction often suffer from blurring, ghosting, and other artifacts. Our approach addresses this texture quality problem using blur detection and an optimized weight function. Experimental results demonstrate that our approach can improve the quality of textured 3D models by reducing the blur and ghosts on the model surface. © 2017, tianjin University and Springer-Verlag GmbH Germany.

关键词： Cameras Image reco.struction

co.struction of Phosphorus-Functionalized Multichannel Carbon Interlayers for Dendrite-Free Metallic Zn Anodes

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Energy & Environmental Materials 2024年第5期7卷 95-103页

作者： Liang He Qingyin Zhang He Li Shiping Liu Ting Cheng Ruoxuan Zhang Yujia Wang Peng Zhang Zhiqiang Shi tianjin Key Laboratory of Advanced Fibers and Energy Storage School of Materials Science and EngineeringTiangong UniversityTianjin 300387China Cangzhou Institute of Tiangong University Cangzhou 061000China School of Chemical Engineering and Technology Tiangong UniversityTianjin 300387China tianjin lishen battery joint-stock co. LTDTianjin 300387China

Zn metal anodes are usually subject to grave dendrite growth during platting/stripping,which dramatically curtails the lifespan of aqueous Zn-ion batteries and *** address above problems,in our work,a novel phosphorus-functionalized multichannel carbon interlayer was designed and co.ered on Zn *** results demonstrated that the multichannel structure co.bined with the three-dimensional meshy skeleton can provide more sufficient space for Zn deposition,thereby effectively inhibiting the growth of zinc ***,theoretical calculations also co.firmed that the P-C and P=O functional groups from phosphorus-functionalized multichannel carbon interlayer have the decisive influence in reducing the zinc nucleation potential and depositing uniformly ***,the symmetrical battery assembled with phosphorus-functionalized multichannel carbon interlayer-co.ered Zn anodes possessed a long lifetime of 3300 h at 2 mA cm^(-2)with 1 mAh cm^(-2).Furthermore,the full cell with activated carbon cathodes exhibited a high specific capacity of 80.5 mAh g^(-1)and outstanding cycling stability without capacity decay after 15000 cycles at a high current density of 5 A g^(-1).The superior electrochemical performance exceeded that of most reported ***,our synthesized zinco.hilic interlayer with the unique structure has superior prospects for application in stabilizing zinc anodes and prolonging the lifespan of batteries.

关键词： aqueous Zn-ion supercapacitors multichannel carbon fiber phosphorus functionalized Zn dendrite Zn metal anode

Thickness evolution of co.mercial Li-ion pouch cells with silico.based co.posite anodes and NCA cathodes

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Science China(Technological Sciences) 2021年第1期64卷 83-90页

作者： ZHANG XingYu HE Jie ZHOU Jiang CHEN HaoSen SONG WeiLi FANG DaiNing State Key Laboratory of Mechanics and co.trol of Mechanical Structures College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China State Key Laboratory of Explosion Science and Technology Institute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing 100081China lishen Research Institute Tianjin Lishen Battery Joint-stock Co.Ltd.Tianjin 300384China State Key Laboratory for Turbulence and co.plex Systems College of EngineeringPeking UniversityBeijing 100871China

It is significant to monitor the thickness change of co.mercial Li-ion pouch cells that are assembled from Si-based electrodes and layered cathodes since the volume variation is critically linked with kinetic reaction mechanism and chemomechanical degradation. In this work, the single-point and full-field measurements are co.ducted on the thickness evolution of Si Ox/Cgraphite/lithium nickel-co.alt-aluminum oxide(Si Ox-G/NCA) batteries. It is found that an abnormal overshoot that has been rarely observed in the previous studies appears at the beginning of discharge, which is believed to be the co.bined results between the rapid expansion of NCA and the co.traction of graphite related to the state of charge(SOC). co.pared with the results of single-point measurement, the spatial displacement distribution obtained from three-dimensional(3D) scanning suggests the full-field thickness evolution of the entire cell scale, which is more feasible and efficient to provide full-field information for supporting pouch cell design and pack integration.

关键词： thickness change 3D scanning silico.-based anode NCA cathode lithium-ion battery

Effects of different iron sources on the performance of LiFePO_4/C co.posite cathode materials

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Journal of University of Science and Technology Beijing 2008年第6期15卷 802-807页

作者： Fei Gao Zhiyuan Tang Jianjun Xue School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China Great Power battery co. ltd. Guangzhou 511483 China

Olivine LiFePO4/C co.posite cathode materials were synthesized by a solid state method in N2 ＋ 5vol% H2 atmosphere. The effects of different iron sources, including Fe（OH）3 and FeC2O4·2H2O, on the performance of as-synthesized cathode materials were investigated and the causes were also analyzed. The crystal structure, the morphology, and the electrochemical performance of the prepared samples were characterized by X-ray diffractometry （XRD）, scanning electron microsco.y （SEM）, laser particle-size distribution measurement, and other electrochemical techniques. The results demonstrate that the LiFePO4/C materials obtained from Fe（OH）3 at 800℃ and FeC2O4·2H2O at 700℃ have the similar electrochemical performances. The initial discharge capacities of LiFePO4/C synthesized from Fe（OH）3 and FeC2O4·2H2O are 134.5 mAh.g^-1 and 137.4 mAh.g^-1 at the C/5 rate, respectively. How- ever, the tap density of the LiFePO4/C materials obtained from Fe（OH）3 are higher, which is significant for the improvement of the capacity of the battery.

关键词： iron sources lithium iron phosphate cathode material solid state method

Microstructure and mechanical properties of dissimilar steel plate resistance plug welding joints

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China Welding 2017年第2期26卷 43-51页

作者： Li Linhe Chen Furong lishen Power battery Systems co. Ltd.Tianjin300384 school of materials science and engineering inner mongolia university of technologyHohhot010051

A new type of hybrid welding method called resistance plug welding （RPW） was firstly adopted to achieve the co.necting of dissimilar steel, mainly as for the poor welding characteristics of high strength steel produced by increasing carbon, manganese, silico., etc. Microstructures and mechanical properties of RPW joint were analyzed by optical microsco.e,micro-hardness test and shear tensile measurement. Experimental results indicate that the RPW joint has a rounded rectangle nugget ^ and the size is larger than elliptical nugget of resistance spot welding （RSW） jo in t; the hardness value of RPW joint is evenly distributed, acco.dingly there is no hard brittle phases ; the shear tensile strength o f RPW joint increases by 20% in co.parison with RSW joint under the same welding co.ditions.

关键词： light weight dissimilar steel resistance spot welding resistance plug welding

Recent progress on the recycling technology of Li-ion batteries

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Journal of Energy Chemistry 2021年第4期30卷 391-419页

作者： Yuqing Wang Ning An Lei Wen Lei Wang Xiaotong Jiang Feng Hou Yuxin Yin Ji Liang Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjin 300072China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina China Automotive Technology&Research Center co. LtdTianjin 300300China tianjin lishen battery joint-stock Limited co.pany Tianjin 300384China Institute for Superco.ducting&Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongInnovation CampusNorth WollongongNSW 2500Australia

Lithium-ion batteries(LIBs)have been widely applied in portable electronic devices and electric *** the booming of the respective markets,a huge quantity of spent LIBs that typically use either LiFePO_(4) or Li N_(x)co.(y)Mn_(z)O_(2) cathode materials will be produced in the very near future,imposing significant pressure for the development of suitable disposal/recycling technologies,in terms of both environmental protection and resource *** this review,we firstly do a co.prehensive summary of the-state-of-art technologies to recycle Li N_(x)co.(y)Mn_(z)O_(2) and LiFePO_(4)-based LIBs,in the aspects of pretreatment,hydrometallurgical recycling,and direct regeneration of the cathode *** closed-loop strategy for cycling cathode materials has been regarded as an ideal approach co.sidering its eco.omic benefit and environmental ***,as for the exhausted anode materials,we focus on the utilization of exhausted anode materials to obtain other functional materials,such as ***,the existing challenges in recycling the LiFePO_(4) and Li N_(x)co.(y)Mn_(z)O_(2) cathodes and graphite anodes for industrial-scale application are discussed in detail;and the possible strategies for these issues are *** expect this review can provide a roadmap towards better technologies for recycling LIBs,shed light on the future development of novel battery recycling technologies to promote the environmental benignity and eco.omic viability of the battery industry and pave way for the large-scale application of LIBs in industrial fields in the near future.

关键词： Li ion battery Recycling Cathode Anode