检索结果-南通市图书馆

overcharge-to-thermal-runaway behavior and safety assessment of commercial lithium-ion cells with different cathode materials:A comparison study

引用

Journal of Energy Chemistry 2021年第4期30卷 484-498页

作者： Zhenpo Wang Jing Yuan Xiaoqing Zhu Hsin Wang Lvwei Huang Yituo Wang Shiqi Xu National Engineering Laboratory for Electric Vehicles Beijing Institute of TechnologyBeijing 100081China Collaborative Innovation Center for Electric Vehicles in Beijing Beijing 100081China Materials Science and Technology Division Oak Ridge National LaboratoryOak Ridge 37831TNUSA Shanghai Jieneng Automotive Technology Co. Ltd.Shanghai 201804China State-assigned Electric Vehicle Power Battery Testing Center China North Vehicle Research InstituteBeijing 100072China

In this paper,overcharge behaviors and thermal runaway(TR)features of large format lithium-ion(Liion)cells with different cathode materials(LiFePO4(LFP),Li[Ni_(1/3)Co_(1/3)Mn_(1/3)]O_(2)(NCM111),Li[Ni_(0.6)Co_(0.2)Mn_(0.2)]O_(2)(NCM622)and Li[Ni_(0.8)Co_(0.1)Mn_(0.1)]O_(2)(NCM811))were *** results showed that,under the same overcharge condition,the TR of LFP Li-ion cell occurred earlier compared with the NCM Li-ion cells,indicating its poor overcharge tolerance and high TR ***,when TR occurred,LFP Li-ion cell exhibited lower maximum temperature and mild TR *** NCM Liion cells caught fire or exploded during TR,while the LFP Li-ion cell only released a large amount of smoke without *** to the overcharge behaviors and TR features,a safety assessment score system was proposed to evaluate the safety of the *** short,NCM Li-ion cells have better performance in energy density and overcharge tolerance(or low TR risk),while LFP Li-ion cell showed less severe response to overcharging(or less TR hazards).For NCM Li-ion cells,as the ratio of nickel in cathode material increases,the thermal stability of the cathode materials becomes poorer,and the TR hazards *** a comparison study on large format Li-ion cells with different cathode materials can provide deeper insights into the overcharge behaviors and TR features,and provide guidance for engineers to reasonably choose battery materials in automotive applications.

关键词： Lithium-ion battery Cathode materials overcharge Thermal runaway overcharge tolerance Safety assessment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

overcharge performance of LiMn_2O_4/graphite battery with large capacity

引用

Journal of Central South University 2009年第5期16卷 763-767页

作者：刘云建李新海郭华军王志兴胡启阳彭文杰 School of Metallurgical Science and Engineering Central South University

The LiMn2O4/grapbite battery was fabricated and its 3 C/10 V overcharge performance was studied. Spinel LiMn2O4 was synthesized by solid-state method and 325680-type size full battery was fabricated. The structure and morphology of the powders were characterized by XRD and SEM technique, respectively. The battery explodes after 3 C/10 V overcharged test, and surface temperature of the battery case arrives at 290 ℃ in 12 s after exploding. Black air is given out with blast. Carbon, MnO, and Li2CO3 are observed in the exploded powders. The cathode electrode remains spinel structure with 5.0 V charged. Cracks in the cathode electrode particles are detected with the increase of voltage by SEM technique. The 5.0 V charged electrode can decompose into Mn3O4 at 400 ℃. It is demonstrated that the decomposition of 5.0 V charged electrode can be promoted and Mn^4＋ can be deoxidized to Mn^2＋ by carbon and electrolyte through the simulation of blast process.

关键词： LiMn2O4 MnO battery overcharge blast

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

overcharge to Remove Cathode Passivation Layer for Reviving Failed Li–O_(2)Batteries

引用

CCS Chemistry 2023年第3期5卷 641-653页

作者： Kai Chen Dong-Yue Yang Jin Wang Gang Huang Xin-Bo Zhang State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022 School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026

Prolonging the lifetime of batteries is a long-term pursuit,and it is also one of the prerequisites for the practical application of ***,this endeavor is challenging for high-energy Li–O_(2)batteries due to their poor charge efficiency and cathode passivation-induced by-products ***,we demonstrated that overcharging Li–O_(2)batteries could facilitate the decomposition of accumulated residue products and revive the cathode;thus,the battery lifespan could be significantly *** long battery lifetime not only made full use of the Li anode but also enabled the battery to recycle in a safer way without the risk of firing and ***,overcharge could be used in Li–O_(2)batteries with high mass loading,high rate,and large *** overcharge strategy simplified the cathode regenerating procedures and realized system-level efficient use of battery components,thereby prolonging the life of Li–O_(2)batteries to meet the requirements of practical applications.

关键词： overcharge Li-O_(2)battery battery life revive battery failure mechanism

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Evolution of the morphology,structural and thermal stability of LiCoO_(2) during overcharge

引用

Journal of Energy Chemistry 2021年第4期30卷 524-532页

作者： Zhitao E Huajun Guo Guochun Yan Jiexi Wang Rukun Feng Zhixing Wang Xinhai Li School of Metallurgy and Environment Central South UniversityChangsha 410083HunanChina

The overcharge behaviors of 1000 m Ah LiCoO_(2)/graphite pouch cells are systematically investigated through the analysis of morphology,structural and thermal stability of LiCoO_(2) under different state of charge(SOC)of 120%,150%,174%,190%and 220%.The LiCoO_(2) experiences the phase transition from O3 to H1-3 and then O1 together with the grain breakage and boundary slip as evidenced by XRD and SEM analysis respectively,which results in the pronounced Co dissolution after the SOC of 174%.The impedance analysis of the pouch cells and coin cells demonstrates that the main contribution of impedance increase originates from the LiCoO_(2) *** the combined effect of structural collapse,Co dissolution,and electrolyte oxidization,the thermal stability of Li CoO_(2) cathode materials reduces with the progressing of overcharge as revealed by differential scanning calorimetry(DSC)*** hope that this comprehensive understanding can provide meaningful guidance for advancing the overcharge performance of LiCoO_(2)/graphite pouch cells.

关键词： Li-ion batteries overcharge Stability LiCoO_(2)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of overcharge on Electrochemical Performance of Sealed-Type Nickel/Metal Hydride Batteries

引用

Journal of Beijing Institute of Technology 2005年第4期14卷 438-441页

作者：李丽吴锋陈人杰陈实 School of Chemical Engineering and Environment Beijing Institute of Technology Beijing100081 China

The effects of overcharge on electrochemical performance of AA size sealed-type nickel/metal hydride（Ni/MH） batteries and its degradation mechanism were investigated. The results indicated that the relationship between the effects of different overcharge currents on the increasing velocity of inner pressure and the degradation velocity of cycle life and discharge voltage remains in almost direct proportion. After overcharge cycles, the positive electrode materials remain the original structure, but there occur some breaks because of the irreversible expand of crystal lattice. And the negative electrode alloy particles have inconspicuous pulverization, but are covered with lots of corrosive products and its main component is rare earth hydroxide or oxide. These are all the main reasons leading to the degradation behavior of the discharge capacity and cycle life of Ni/MH batteries.

关键词： nickel/metal hydride batteries overcharge inner pressure degradation mechanism

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Thermal Behavior Investigation of LiNi1/3CO1/3Mn1/3O2-Based Li-ion Battery under overcharged Test

引用

Chinese Journal of Chemistry 2011年第1期29卷 27-32页

作者： Wang, Haiyan Tang, Aidong Huang, Kelong School of Chemistry and Chemical Engineering Central South University Changsha Hunan 410083 China

Thermal behavior of its components such as separator, electrolyte, cathode, anode, and each binder were inves- tigated by differential scanning calorimetry and thermal gravimetric （DSC/TG） to explain thermal runaway mechanism of Li-ion battery under overcharged test. DSC results indicated the decomposition reaction temperature of SEI （solid electrolyte interface） layer in anode was at about 126℃. It was found that heat generation in anode under normal charged state increased obviously with the increasing of charged voltage. When the battery was overcharged to 4.6 V or 5.0 V, the onset temperature and heat generation of thermal reaction in anode changed a little, while those in cathode had large increase. It was proposed that thermal behavior in cathode mainly caused by the reaction of electrolyte with evolutional oxygen played a key role to thermal runaway for the studied Li-ion battery under overcharged test.

关键词： lithium-ion battery LiNi1/3CO1/3Mn1/3O2 thermochemistry calorimetry overcharge

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Impact of evolution of cathode electrolyte interface of Li(Ni0.8Co0.1Mn0.1)O2 on electrochemical performance during high voltage cycling process

引用

Journal of Energy Chemistry 2020年第8期29卷 72-78,I0003页

作者： Wei Wang Qin Yang Kun Qian Baohua Li Engineering Laboratory for Next Generation Power and Energy Storage Batteries Graduate School at ShenzhenTsinghua UniversityShenzhen 518055GuangdongChina School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China

In this work, the electrochemical performance of LiNi0.8Co0.1Mn0.1O2(NCM811) has been investigated after cycling with various upper cutoff voltages. Noteworthily, electrochemical impedance of NCM811 declined with the increasing cycle number to high voltages. It was found that the decline of charge transfer impedance could be related to the structural and compositional change of cathode electrolyte interphase(CEI) of NCM811 when charging to high voltages, based on the characterization of electrochemical impedance spectroscopy(EIS), X-ray photoelectron spectroscopy(XPS) and transmission electron microscopy(TEM). The corresponding mechanism has also been proposed in this study. Specifically, due to the increasing roughness of cathode surface, the bottom of CEI film and cubic phase on cathode surface form a transition region mainly at high voltages, leading to the nonobvious boundary. This newly formed transition region at high voltages could promote the Li ion diffusion from electrolyte to cathode, then reducing charge transfer impedance. Additionally, the decrease of Li F on the surface of the cathode could also make a contribution to lower the interface impedance. This study delivers a different evolution of CEI on NCM811, and the impact of CEI evolution on electrochemical performance when charging to a high voltage.

关键词： Cathode electrolyte interface NCM811 overcharge Rock salt phase

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Explosion behavior investigation and safety assessment of large-format lithium-ion pouch cells

引用

Journal of Energy Chemistry 2022年第9期31卷 241-257,I0007页

作者： Tongxin Shan Zhenpo Wang Xiaoqing Zhu Hsin Wang Yangjie Zhou Yituo Wang Jinghan Zhang Zhiwei Sun National Engineering Research Center of Electric Vehicles Beijing Institute of TechnologyBeijing 100081China Materials Science and Technology Division Oak Ridge National LaboratoryOak RidgeTN 37831United States State-assigned Electric Vehicle Power Battery Testing Center China North Vehicle Research InstituteBeijing 100072China

Large-format lithium-ion(Li-ion) batteries with high energy density for electric vehicles are prone to thermal runaway(or even explosion) under abusive conditions. In this study, overcharge induced explosion behaviors of large-format Li-ion pouch cells with Li[NiCoMn]Ocathode at different current rates(C-rates)(0.5C, 1C, 2C) were investigated. The explosion characteristics of the cells were elucidated by discussing the evolution of the cell voltage, the surface temperature and the shock wave ***, the whole overcharge process could be divided into four stages according to the evolution of several key parameters and the overcharge behaviors;the overcharge C-rate has a great influence on cells’ thermal behaviors. The experimental results showed that the thermal runaway process of Liion cells caused by overcharging consisted of two kinds of explosions, physical explosion and chemical explosion. The existence of observable negative pressure zone in the pressure curves indicated that the Li-ion cells are not a self-supplying oxygen system during the explosion. Further, the explosion dynamics parameters were matched. An explosion TNT-equivalent conversion strategy that depended on the pressure of the shock wave was utilized to evaluate the released energy and its hazards. In addition, with respect to the overcharge of Li-ion pouch cells, a safety assessment method and a safety management method were proposed based on the explosion behaviors. From the perspective of battery safety, this study is of great significance for the safety design of Li-ion cells and can provide guidance for engineers to optimize the safety function of battery packs.

关键词： Lithium-ion battery overcharge Explosion behavior Safety Explosion dynamics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Insight into the structural evolution and thermal behavior of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) cathode under deep charge

引用

Journal of Energy Chemistry 2022年第2期31卷 424-432页

作者： Chen Liang Lihua Jiang Zesen Wei Wenhua Zhang Qingsong Wang Jinhua Sun State Key Laboratory of Fire Science University of Science and Technology of Chin1Hefei 230026AnhuiChina National Synchrotron Radiation Laboratory University of Science and Technology of Chin1Hefei 230026AnhuiChina

By virtue of the crucial effect of the crystal structure and transition metal(TM)redox evolution on the performance of LiNi_(x)Co_(y)Mn_(z)O_(2)(NCM)cathode,systematical investigation is carried out to better understand the charge mechanism upon deep *** on the results of X-ray diffraction and highresolution transmission electron microscope,phase transformations existing on particle surface are promoted by high potential because of the deeper lithium vacancies,accompanied by more substantial structure *** X-ray absorption spectroscopy indicates that Ni acts as the major contributor to charge compensation while Co displays a remarkable redox activity over the deep charge *** elevated integrated intensity of pre-edge in O K-edge spectra reveals the extensive amount of holes formed in O 2 p orbitals and the enhanced hybridization of TM 3 d-O 2 p *** the close relationship between thermal behavior and structural evolution,the tendency of phase transitions and O_(2) release upon heating is accelerated by voltage rise,demonstrating the aggravated instability due to deeper Li *** Li contents in NCM are employed to estimate the amount of oxygen released in structural transformation and its detrimental effect on stability declares Li contentdependent ***,the extended Li vacancies,higher proportion of Ni4+and stronger orbital hybridization are considered as three factors impeding the thermal stability of the highlydelithiated NCM.

关键词： Lithium ion battery safety overcharge Soft X-ray absorption spectroscopy Thermal property Cathode material

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Noninvasive Detection of the Gases Inside the Sealed Batteries by the On-line Mass Spectrometry

引用

Chinese Chemical Letters 2004年第7期15卷 823-826页

作者： XiaoRongZHOU PeiFangLIU LinZHUANG JunTaoLU DepartmentofChemistry WuhanUniversityWuhan430072

Mass spectrometer is connected through an adaptor to a sealed small battery to probe the gas phase changes inside the battery. The factors influencing the response time are analyzed with a simplified model. The feasibility of the new technique is demonstrated with a Ni-Cd battery, showing different profiles of MS intensities for O2 and H2. Compared with gas chromatography, this technique has the advantage of being noninvasive and should be useful for the study and diagnostic examination of small sealed batteries.

关键词： Mass spectroscopy gas evolution batteries overcharge noninvasive.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：