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Thermal runaway evolution of a 280 Ah lithium-ion battery with LiFePO_(4) as the cathode for different heat transfer modes constructed by mechanical abuse

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Journal of Energy Chemistry 2024年第6期93卷 32-45,I0002页

作者： zhixiang cheng chengdong Wang Wenxin Mei Peng Qin Junyuan Li Qingsong Wang State Key Laboratory of Fire Science University of Science and Technology of ChinaHefei 230026AnhuiChina

Lithium iron phosphate batteries have been increasingly utilized in recent years because their higher safety performance can improve the increasing trend of recurring thermal runaway accidents.However,the safety performance and mechanism of high-capacity lithium iron phosphate batteries under internal short-circuit challenges remain to be explored.This work analyzes the thermal runaway evolution of high-capacity LiFePO_(4) batteries under different internal heat transfer modes,which are controlled by different penetration modes.Two penetration cases involving complete penetration and incomplete penetration were detected during the test,and two modes were performed incorporating nails that either remained or were removed after penetration to comprehensively reveal the thermal runaway mechanism.A theoretical model of microcircuits and internal heat conduction is also established.The results indicated three thermal runaway evolution processes for high-capacity batteries,which corresponded to the experimental results of thermal equilibrium,single thermal runaway,and two thermal runaway events.The difference in heat distribution in the three phenomena is determined based on the microstructure and material structure near the pinhole.By controlling the heat dissipation conditions,the time interval between two thermal runaway events can be delayed from 558 to 1417 s,accompanied by a decrease in the concentration of in-situ gas production during the second thermal runaway event.

关键词： Lithium-ion battery safety Micro short-circuit cell Heat transfer modes Internal short circuit Nail-penetration test

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In situ reconstruction induced oxygen-deficient multiphase Cu based species hybridized with Ni single atoms as tandem platform for CO_(2) electroreduction

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Nano Research 2024年第5期17卷 3888-3894页

作者： Juzhe Liu Yuheng Wang Pengpeng Mo Feng Yang Kaiqi Jiang zhixiang cheng Yuxuan Liu Zhiyi Sun Zheng Liu Yimei Zhang Wenxing Chen The Key Laboratory of Resources and Environmental System Optimization Ministry of EducationCollege of Environmental Science and EngineeringNorth China Electric Power UniversityBeijing 102206China Energy&Catalysis Center School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China SEPA Key Laboratory of Eco-Industry Chinese Research Academy of Environmental SciencesBeijing 100012China

Tandem catalysis,capable of decoupling individual steps,provides a feasible way to build a high-efficiency CO_(2) electro-conversion system for multicarbons(C_(2+)).The construction of electrocatalytic materials is one of focusing issues.Herein,we fabricated a single atom involved multivalent oxide-derived Cu composite material and found it inclined to reconstruct into oxygen-deficient multiphase Cu based species hybridized with monatomic Ni on N doped C matrix.In this prototype,rapid CO generation and C-C coupling are successively achieved on NiN4 sites and surface amorphized Cu species with defects,resembling a micro-production line.In this way,the in situ formed tandem catalyst exhibited a high Faradaic efficiency(FE)of~78%for C_(2+)products along with satisfactory durability over 50 h.Particularly,the reconstruction-induced amorphous layer with abundant asymmetric sites should be favorable to improve the ethanol selectivity(FE:63%),which is about 10 times higher than that of the non-tandem Cu-based contrast material.This work offers a new approach for manipulating tandem catalyst systems towards enhancing C_(2+)products.

关键词： tandem catalysis single atom reconstruction amorphous CO_(2)reduction reaction

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Investigation on interfacial and electrical properties of Ge MOS capacitor with different NH_3-plasma treatment procedure

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Journal of Semiconductors 2017年第8期38卷 38-43页

作者： Xiaoyu Liu Jingping Xu Lu Liu zhixiang cheng Yong Huang Jingkang Gong School of Optical and Electronic Information Huazhong University of Science and Technology

The effects of different NH3-plasma treatment procedures on interracial and electrical properties of Ge MOS capacitors with stacked gate dielectric of HtTiON/TaON were investigated. The NH3-plasma treatment was performed at different steps during fabrication of the stacked gate dielectric, i.e. before or after interlayer （TaON） deposition, or after deposition ofhigh-k dielectric （HfriON）. It was found that the excellent interface quality with an interface-state density of 4.79 × 101l eV-lcm-2 and low gate leakage current （3.43 ×10-5 A/cm2 at Vg = 1 V） could be achieved for the sample with NH3-plasma treatment directly on the Ge surface before TaON deposition. The involved mechanisms are attributed to the fact that the NH3-plasma can directly react with the Ge surface to form more Ge-N bonds, i.e. more GeOxNy, which effectively blocks the inter-diffusion of elements and suppresses the formation of unstable GeOx interfacial layer, and also passivates oxygen vacancies and dangling bonds near/at the interface due to more N incorporation and decomposed H atoms from the NH3-plasma.

关键词： Ge MOS NH3-plasma treatment TaON interlayer stacked gate dielectric

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AMPK activation by peri-sciatic nerve administration of ozone attenuates CCl-induced neuropathic pain in rats

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Journal of Molecular Cell Biology 2017年第2期9卷 132-143页

作者： Lijuan Lu Cailong Pan Lu Chen Liang Hu Chaoyu Wang Yuan Han Yanjing Yang zhixiang cheng Wen-Tao Liu Department of Pain Affiliated Drum Tower Hospital of Medical School of Nanjing University Nanjing 210008 China Jiangsu Key Laboratory of Neurodegeneration Department of Pharmacology Nanjing Medical University Nanjing 210029 China State Key Laboratory of Natural Medicines China Pharmaceutical University Nanjing 210009 China Jiangsu Key Laboratory of Oral Diseases Nanjing Medical University Nanjing 210029 China Department of Pain Management & Cancer Biotherapy Center The Second Affiliated Hospital of Nanjing Medicat University Nanjing 210029 China

Neuropathic pain is a debilitating clinical condition with few efficacious treatments, warranting development of novel therapeutics. Ozone is widely used as an alternative therapy for many different pain conditions, with exact mechanisms still elusive. In this study, we found that a single peri-sciatic nerve injection of ozone decreased mechanical allodynia and thermal hyperalgesia, and normalized the phosphorylation of protein kinase C γ, N-methyl-D-aspartate receptor, and extracellular signal-regulated kinase in a chronic constriction injury (CCI) model in rat sciatic nerve. Meanwhile, ozone significantly suppressed CCI-induced activation of spinal microglia. More importantly, the anti-nociceptive effect of ozone depended on the activation of 5′-adenosine monophosphate (AMP)-activated protein kinase (AMPK), which was proved by the fact that the phosphorylated AMPK level increased during the ozone therapy and AMPK antagonist abolished the effect of ozonein vivoandin vitro. In addition, direct injection of AMPK agonist could replicate the anti-nociceptive effect of ozone in CCI rats. In conclusion, our observations indicate that peri-sciatic nerve injection of ozone activates AMPK to attenuate CCI-induced neuropathic pain.

关键词：臭氧减少 AMPK 坐骨神经病理性激活疼痛四氯化碳大鼠

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基于混沌求偶萤火虫算法的移动机器人路径规划

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机床与液压 2024年第3期52卷 55-59页

作者：侯志祥成威李凤玲长沙理工大学汽车与机械工程学院湖南长沙410114

针对传统萤火虫算法应用于移动机器人路径规划中存在陷入局部最优和搜索精度低的问题,提出一种基于混沌求偶萤火虫算法的移动机器人路径规划方法。设计一种混沌求偶荧火虫算法,该算法采用混沌映射策略初始化种群,优化种群分布不均和搜... 详细信息

针对传统萤火虫算法应用于移动机器人路径规划中存在陷入局部最优和搜索精度低的问题,提出一种基于混沌求偶萤火虫算法的移动机器人路径规划方法。设计一种混沌求偶荧火虫算法,该算法采用混沌映射策略初始化种群,优化种群分布不均和搜索范围不足问题;利用求偶学习策略指导雄性萤火虫向雌性萤火虫学习,提高算法的收敛速度和求解精度。建立移动机器人路径规划的环境仿真模型,应用混沌求偶萤火虫算法进行移动机器人路径规划仿真。仿真结果表明:混沌求偶萤火虫算法比传统萤火虫算法和粒子群算法在路径长度上分别减少了3.075%和2.428%,拥有更高的搜索精度和跳出局部最优的能力。

关键词：移动机器人路径规划萤火虫算法混沌映射求偶学习策略

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基于车车通信列控系统的城市轨道交通列车运行效率分析

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城市轨道交通研究 2024年第3期27卷 106-113页

作者：邓志翔王成徐军姜西中铁第四勘察设计院集团有限公司武汉430063 温州市铁路与轨道交通投资集团有限公司温州325088

[目的]城市轨道交通T2T(车车通信)列控系统是一种新型的信号系统,其通过资源化管理方式对轨旁设备进行管控。为了验证该系统的优越性,需对该系统下的列车运行效率进行分析。[方法]针对T2T列控系统,基于资源管理层面和安全防护原理的特点... 详细信息

[目的]城市轨道交通T2T(车车通信)列控系统是一种新型的信号系统,其通过资源化管理方式对轨旁设备进行管控。为了验证该系统的优越性,需对该系统下的列车运行效率进行分析。[方法]针对T2T列控系统,基于资源管理层面和安全防护原理的特点,在折返工况下,将原本由联锁控制的双动道岔转变为两个单动道岔,并基于列车精确自定位实现ATP(列车自动防护),提高了岔区线路资源的使用能力;在区间和车站追踪工况下,通过前后车对于车速、加速度、所处线路位置等信息的实时互传,利用相对速度安全防护原理进一步缩小了列车的追踪间隔。通过上述两方面的技术革新,结合城市轨道交通线路的实际数据,对站后交叉渡线折返、站前单渡线折返、区间与车站追踪等运营场景进行了模拟仿真计算,确定了T2T列控系统的折返能力和区间追踪能力。[结果及结论]相较传统的CBTC(基于通信的列车控制系统),T2T列控系统在折返能力、追踪能力等方面均有着显著提升,更加适应于超大运量的城市轨道交通线路;T2T列控系统架构简单,轨旁设备少,尤其适合城市轨道交通的大修改造项目。

关键词：城市轨道交通列车运行效率列控系统车车通信

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Preparation and optical absorption of InAs nanocrystal-embedded thin films

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Chinese Science Bulletin 1999年第3期44卷 210-214页

作者： Jianzhong Shi Kaigui Zhu Weiguo Yao Juhui Jia zhixiang cheng Lide Zhang Acad Sinica Inst Solid State Phys Hefei 230031 Peoples R China Suzhou Univ Dept Phys Suzhou 215006 Peoples R China

InAs-SiO2 nanocrystal-embedded films were prepared by using radio-frequency cosputtering. The growth behavior of InAs in the composite film has been studied by a transmission electron microscope. It has been found that with the increasing substrate temperature, InAs in the matrix undergoes transitions from an initial dispersed phase to a fractal structure of the InAs phase, then to nucleation, and finally to grain growth. Large blueshift of the optical absorption edges of the films was observed from the optical absorption spectra. The relationship between the blueshift of optical absorption edge and the average size of the nanocrystals has been explained by the effective-mass approximation.

关键词： nanocrystal-embedded thin films radio-frequency cosputtering optical absorption quantum confinement.

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Specialized endoplasmic reticulum-derived vesicles in plants:Functional diversity,evolution,and biotechnological exploitation

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Journal of Integrative Plant Biology 2022年第4期64卷 821-835页

作者： Xie Li Xifeng Li Baofang Fan cheng Zhu zhixiang Chen College of Life Science Key Laboratory of Marine Food Quality and Hazard Controlling Technology of Zhejiang ProvinceChina Jiliang UniversityHangzhou 310018China Department of Botany and Plant Pathology Center for Plant BiologyPurdue UniversityWest Lafayette IN 47907-2054USA

A central role of the endoplasmic reticulum(ER)is the synthesis,folding and quality control of secretory proteins.Secretory proteins usually exit the ER to enter the Golgi apparatus in coat protein complex II(COPII)-coated vesicles before transport to different subcellular destinations.However,in plants there are specialized ER-derived vesicles(ERDVs)that carry specific proteins but,unlike COPII vesicles,can exist as independent organelles or travel to the vacuole in a Golgi-independent manner.These specialized ERDVs include protein bodies and precursor-accumulating vesicles that accumulate storage proteins in the endosperm during seed development.Specialized ERDVs also include precursor protease vesicles that accumulate amino acid sequence KDEL-tailed cysteine proteases and ER bodies in Brassicales plants that accumulate myrosinases that hydrolyzes glucosinolates.These functionally specialized ERDVs act not only as storage organelles but also as platforms for signal-triggered processing,activation and deployment of specific proteins with important roles in plant growth,development and adaptive responses.Some specialized ERDVs have also been exploited to increase production of recombinant proteins and metabolites.Here we discuss our current understanding of the functional diversity,evolutionary mechanisms and biotechnological application of specialized ERDVs,which are associated with some of the highly remarkable characteristics important to plants.

关键词： endoplasmic reticulum-derived vesicles ER body glucosinolates myrosinases precursor accumulating vesicles precursor protease vesicles prolamins protein body ricinosomes zeins

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Connecting Calcium-Based Nanomaterials and Cancer:From Diagnosis to Therapy

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Nano-Micro Letters 2022年第9期14卷 95-131页

作者： Shuang Bai Yulu Lan Shiying Fu Hongwei cheng zhixiang Lu Gang Liu State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics Center for Molecular Imaging and Translational MedicineSchool of Public HealthXiamen UniversityXiamen 361102People’s Republic of China State Key Laboratory of Cellular Stress Biology Innovation Center for Cell BiologySchool of Life SciencesXiamen UniversityXiamen 361102

As the indispensable second cellular messenger,calcium signaling is involved in the regulation of almost all physiological processes by activating specific target proteins.The importance of calcium ions(Ca^(2+))makes its“Janus nature”strictly regulated by its concentration.Abnormal regulation of calcium signals may cause some diseases;however,artificial regulation of calcium homeostasis in local lesions may also play a therapeutic role.“Calcium overload,”for example,is characterized by excessive enrichment of intracellular Ca^(2+),which irreversibly switches calcium signaling from“positive regulation”to“reverse destruction,”leading to cell death.However,this undesirable death could be defined as“calcicoptosis”to offer a novel approach for cancer treatment.Indeed,Ca^(2+)is involved in various cancer diagnostic and therapeutic events,including calcium overload-induced calcium homeostasis disorder,calcium channels dysregulation,mitochondrial dysfunction,calcium-associated immunoregulation,cell/vascular/tumor calcification,and calcification-mediated CT imaging.In paral-lel,the development of multifunctional calcium-based nanomaterials(e.g.,calcium phosphate,calcium carbonate,calcium peroxide,and hydroxyapatite)is becoming abundantly available.This review will highlight the latest insights of the calcium-based nanomaterials,explain their application,and provide novel perspective.Identifying and characterizing new patterns of calcium-dependent signaling and exploiting the disease element linkage offer additional translational opportunities for cancer theranostics.

关键词： Calcium-based nanomaterials Cancer therapy Calcium signaling Tumor calcification Theranostics

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地下综合管廊燃气泄漏数值模拟研究

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中国安全生产科学技术 2024年第6期20卷 99-104页

作者：殷利鹏邢志祥朱飞昊徐慧吴洁程洋常州大学安全科学与工程学院江苏常州213000

为研究燃气在地下综合管廊内不同几何结构顶部泄漏和扩散情况,通过Ansys Fluent软件建立拱顶、尖顶和平顶3种结构的管廊燃气泄漏数值模拟模型,分析燃气在不同结构管廊内的扩散规律。研究结果表明:管廊结构会影响燃气扩散情况,泄漏后燃... 详细信息

为研究燃气在地下综合管廊内不同几何结构顶部泄漏和扩散情况,通过Ansys Fluent软件建立拱顶、尖顶和平顶3种结构的管廊燃气泄漏数值模拟模型,分析燃气在不同结构管廊内的扩散规律。研究结果表明:管廊结构会影响燃气扩散情况,泄漏后燃气倾向于向管廊顶部积聚;燃气分层与管廊结构相关,其中拱顶结构分层相比尖顶和平顶更稳定;管廊结构会影响燃气扩散速度,其中拱顶结构内扩散速率相对最低,该结构可降低爆炸风险;本文管廊扩散预测模型的最大相对误差为4.57%,该模型能较准确预测燃气泄漏扩散情况。研究结果可为地下管廊的安全性研究提供一定参考。

关键词：地下管廊燃气泄漏数值模拟理查森数通风频率

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