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Thermal stability of LiPF_6/EC+DMC+EMC electrolyte for lithium ion batteries

Rare Metals 2006年第Z1期25卷 94-99页

作者： WANG qingsong sun Jinhua CHEN Chunhua State Key Laboratory of Fire Science University of Science and Technology of China Hefei 230026 China State Key Laboratory of Fire Science University of Science and Technology of China Hefei 230026 China Department of Materials Science & Engineering University of Science and Technology of China Hefei 230026 China

The thermal stability of lithium-ion battery electrolyte could substantially affect the safety of lithium-ion battery. In order to disclose the thermal stability of 1.0 mol·L-1 LiPF6/ethylene carbonate (EC)+dimethyl carbonate (DMC)+ethylmethyl carbonate (EMC) electrolyte, a micro calorimeter C80 micro calorimeter was used in this paper. The electrolyte samples were heated in argon atmosphere, and the heat flow and pressure performances were detected. It is found that LiPF6 influences the thermal behavior remarkably, with more heat generation and lower onset temperature. LiPF6/EC shows an exothermic peak at 212 ℃ with a heat of reaction -355.4 J·g-1. DMC based LiPF6 solution shows two endothermic peak temperatures at 68.5 and 187 ℃ in argon filled vessel at elevated temperature. EMC based LiPF6 solution shows two endothermic peak temperatures at 191 and 258 ℃ in argon filled vessel. 1.0 mol·L-1 LiPF6/EC+DMC+ EMC electrolyte shows an endothermic and exothermic process one after the other at elevated temperature. By comparing with the thermal behavior of single solvent based LiPF6 solution, it can be speculated that LiPF6 may react with EC, DMC and EMC separately in 1.0 mol·L-1 LiPF6/EC+DMC+EMC electrolyte, but the exothermic peak is lower than that of 1.0 mol·L-1 LiPF6/EC solution. Furthermore, The 1.0 mol·L-1 LiPF6/EC+DMC+EMC electrolyte decomposition reaction order was calculated based on the pressure data, its value is n=1.83, and the pressure rate constants kp=6.49×10-2 kPa·-0.83·min-1.

关键词： lithium ion battery electrolyte thermal stability C80 micro calorimeter

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胸腺肽α1联合乌司他丁免疫调节治疗脓毒症的效果

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华夏医学 2024年第4期37卷 126-131页

作者：孙青松吴金海南阳市第一人民医院南阳473000

目的观察胸腺肽α1联合乌司他丁免疫调节治疗脓毒症(SS)的临床效果。方法采用摸球法将110例SS患者分为两组,每组55例。对照组采用拯救脓毒症战役(SSC)经典治疗,观察组采用胸腺肽α1联合乌司他丁免疫调节治疗,比较两组患者的临床疗效、... 详细信息

目的观察胸腺肽α1联合乌司他丁免疫调节治疗脓毒症(SS)的临床效果。方法采用摸球法将110例SS患者分为两组,每组55例。对照组采用拯救脓毒症战役(SSC)经典治疗,观察组采用胸腺肽α1联合乌司他丁免疫调节治疗,比较两组患者的临床疗效、炎症因子、健康状况调查表(SF-36)评分、血气指标。结果治疗后,观察组的有效率98.18%,高于对照组的81.82%,差异有统计学意义(P<0.05)。治疗10 d后,两组血气指标水平相比,观察组PaO_(2)、SaO_(2)的水平均高于对照组,PaCO_(2)水平低于对照组(P<0.05);治疗10 d后,观察组hs-CRP、PCT、IL-6、TNF-α的水平均低于对照组(P<0.05);治疗10 d后,观察组CD3^(+)、CD4^(+)、CD8^(+)、CD4^(+)/CD8^(+)的水平均低于对照组(P<0.05);观察组SF-36评分高于对照组(P<0.05)。结论应用胸腺肽α1联合乌司他丁治疗SS效果确切,能快速改善患者血气指标与免疫功能,控制炎症反应,利于预后。

关键词：胸腺肽α1 乌司他丁免疫调节治疗脓毒症

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电缆支架全生命周期碳排放计算与分析

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高压电器 2024年第4期60卷 40-48页

作者：张宇娇李宏松郭垚孙青松董广广黄雄峰合肥工业大学电气与自动化工程学院合肥230009 河北电力工程监理有限公司石家庄050081

“双碳”背景下,碳排放量是电缆线路支架材料选择的重要评价标准之一,然而目前针对电缆支架的碳排放量计算缺乏相关模型。文中构建了一种基于碳排放因子法的电缆支架全生命周期碳排放计算模型,其中考虑电缆支架耗材量和涡流损耗的碳排... 详细信息

“双碳”背景下,碳排放量是电缆线路支架材料选择的重要评价标准之一,然而目前针对电缆支架的碳排放量计算缺乏相关模型。文中构建了一种基于碳排放因子法的电缆支架全生命周期碳排放计算模型,其中考虑电缆支架耗材量和涡流损耗的碳排放活动影响。针对不同材料支架的承重性能及腐蚀速率,计算支架在全生命周期内的总耗材量,针对不同材料支架的感应电流能力,计算支架上的涡流损耗,并结合碳排放因子计算出对应的碳排放量。最后以雄东—昝西220 kV电缆线路为例,计算了该线路采用两种不同材料支架的全生命周期碳排放量,结果表明304L不锈钢支架碳排放量远小于Q235碳钢支架,304L不锈钢作为新材料电缆支架具有较好的节能减排效果。

关键词：碳排放全生命周期电缆支架碳钢不锈钢

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Prediction of Shanghai Stock Index Based on Investor Sentiment and CNN-LSTM Model

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Journal of Systems Science and Information 2022年第6期10卷 620-632页

作者： Yi sun qingsong sun Shan ZHU School of Finance Anhui University of Finance&EconomicsBengbu 233030China Management College Ocean University of ChinaQingdao 266100China School of Business Hong Kong Baptist UniversityHong Kong 999077China

In view of the breakthrough progress of the depth learning method in image and other fields,this paper attempts to introduce the depth learning method into stock price forecasting to provide investors with reasonable investment *** paper proposes a stock prediction hybrid model named ISI-CNN-LSTM considering investor sentiment based on the combination of long short-term memory(LSTM) and convolutional neural network(CNN).The model adopts an end-to-end network structure,using LSTM to extract the temporal features in the data and CNN to mine the deep features in the data can effectively improve the prediction ability of the model by increasing investor sentiment in the network *** empirical part makes a comparative experimental analysis based on Shanghai stock index in *** comparing the experimental prediction results and evaluation indicators,it verifies the prediction effectiveness and feasibility of ISI-CNN-LSTM network model.

关键词： convolution neural network long short-term memory investor sentiment stock price forecasting

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Collaborative Diffusion Model of Information and Behavior in Social Networks

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Journal of Social Computing 2023年第3期4卷 243-253页

作者： qingsong sun Yang Wang Gang sun Haibo Hu the School of Economics and Trade Anhui Finance and Trade Vocational CollegeHefei 230601China the School of Computer and Information Anqing Normal UniversityAnqing 246011China the sun Create Electronics Co. LtdHefei 230092China the School of Business East China University of Science and TechnologyShanghai 200237China

Information diffusion may lead to behaviors related to information *** paper considers the co-existence of information and behavior diffusion in social *** state of users is divided into six categories,and the rules and model of collaborative diffusion of information and behavior are *** influence of different parameters and conditions on the proportions of behavior diffusion nodes and information diffusion ones is analyzed *** results show that the proportion of nodes taking action in uniform networks is higher than that in non-uniform *** users are more likely to take actions related to information content after spreading or knowing information,the results show that it has little influence on the proportion of users taking *** proportion is mainly affected by the probability that users who do not take action become ones who *** greater the probability,the less the proportion of nodes who know *** addition,compared with choosing the same node as the initial information and behavior diffusion node,choosing different nodes is more beneficial to the diffusion of behaviors related to information content.

关键词： information diffusion behavior diffusion social network

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岩石山区输电线路微型桩抗剪性能有限元分析

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河北电力技术 2024年第3期43卷 71-75页

作者：王敬德刘增炜孙青松张新春李北河北电力工程监理有限公司河北石家庄050081 国网河北省电力有限公司建设公司河北石家庄050081 华北电力大学机械工程系河北保定071003

微型桩具有结构简单、施工周期短和绿色环保等优点,在山区输电线路工程中具有广泛的应用前景,也符合电网建设机械化施工的发展方向。利用有限元分析方法,建立了岩石山区输电线路微型桩的抗剪力学模型,研究了微型桩在水平荷载下的承载能... 详细信息

微型桩具有结构简单、施工周期短和绿色环保等优点,在山区输电线路工程中具有广泛的应用前景,也符合电网建设机械化施工的发展方向。利用有限元分析方法,建立了岩石山区输电线路微型桩的抗剪力学模型,研究了微型桩在水平荷载下的承载能力,讨论了不同桩径、桩身弹性模量以及岩石地质参数对微型桩抗剪性能的影响。研究结果表明:除了岩石地质参数,山区输电线路微型桩的抗剪性能还受桩体几何结构参数的影响。随着桩径和桩身弹性模量的增加,微型桩的抗剪性能相应提高,其中桩径对微型桩水平承载力影响最大;当土体弹性模量、摩擦角和黏聚力增加时,桩身位移将非线性递减,其中摩擦角对桩身水平位移的影响最大,土体弹性模量影响最小。

关键词：输电线路微型桩抗剪性能承载力有限元分析

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Effect of safety valve types on the gas venting behavior and thermal runaway hazard severity of large-format prismatic lithium iron phosphate batteries

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Journal of Energy Chemistry 2024年第2期89卷 195-207,I0006页

作者： Zhuangzhuang Jia Yuanyuan Min Peng Qin Wenxin Mei Xiangdong Meng Kaiqiang Jin Jinhua sun qingsong Wang State Key Laboratory of Fire Science University of Science and Technology of ChinaHefei 230026AnhuiChina Gotion High-Tech Co. Ltd.Hefei 230012AnhuiChina

The safety valve is an important component to ensure the safe operation of lithium-ion batteries(LIBs).However,the effect of safety valve type on the thermal runaway(TR)and gas venting behavior of LIBs,as well as the TR hazard severity of LIBs,are not *** this paper,the TR and gas venting behavior of three 100 A h lithium iron phosphate(LFP)batteries with different safety valves are investigated under *** to previous studies,the main contribution of this work is in studying and evaluating the effect of gas venting behavior and TR hazard severity of LFP batteries with three safety valve *** significant results are obtained:(Ⅰ)the safety valve type dominates over gas venting pressure of battery during safety venting,the maximum gas venting pressure of LFP batteries with a round safety valve is 3320 Pa,which is one order of magnitude higher than other batteries with oval or cavity safety valve;(Ⅱ)the LFP battery with oval safety valve has the lowest TR hazard as shown by the TR hazard assessment model based on gray-fuzzy analytic hierarchy *** study reveals the effect of safety valve type on TR and gas venting,providing a clear direction for the safety valve design.

关键词： Lithium iron phosphate battery Safety valve Thermal runaway Gas venting behavior Thermal runaway hazard severity Gray-fuzzy analytic hierarchy process

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冻融循环作用下改性分散性土强度劣化研究

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水利科学与寒区工程 2024年第9期7卷 1-5页

作者：孙清松王宇李兆宇司振江薛子豪李小双张家阳黑龙江大学水利电力学院黑龙江哈尔滨150080 黑龙江省水利科学研究院黑龙江哈尔滨150080 黑龙江省季节冻土区工程冻土重点实验室黑龙江哈尔滨150080

针对冻融循环对改性分散性土的力学性能劣化影响,采用粉煤灰结合氯化铝作为复合改良剂通过冻融循环试验、三轴剪切试验和无侧限抗压试验研究了在不同复合改良剂掺量下冻融循环对改性分散性土的力学性能影响。试验结果表明:随着复合改良... 详细信息

针对冻融循环对改性分散性土的力学性能劣化影响,采用粉煤灰结合氯化铝作为复合改良剂通过冻融循环试验、三轴剪切试验和无侧限抗压试验研究了在不同复合改良剂掺量下冻融循环对改性分散性土的力学性能影响。试验结果表明:随着复合改良剂掺量增加,土样的内摩擦角、黏聚力和无侧限抗压强度也在增加且与冻融循环次数呈负相关;其次三轴剪切试验与无侧限抗压试验中的参数具有较强的相关性,在同等条件下能根据三轴试验中的内摩擦角和黏聚力去很好的预测试样的无侧限抗压强度。

关键词：分散性土冻融循环复合改良剂三轴剪切试验无侧限抗压试验

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Early warning method for thermal runaway of lithium-ion batteries under thermal abuse condition based on online electrochemical impedance monitoring

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Journal of Energy Chemistry 2024年第5期92卷 74-86页

作者： Yuxuan Li Lihua Jiang Ningjie Zhang Zesen Wei Wenxin Mei Qiangling Duan Jinhua sun qingsong Wang State Key Laboratory of Fire Science University of Science and Technology of ChinaAnhui 230026HefeiChin

Early warning of thermal runaway(TR)of lithium-ion batteries(LIBs)is a significant challenge in current application *** and effective TR early warning technology is urgently required considering the current fire safety situation of *** this work,we report an early warning method of TR with online electrochemical impedance spectroscopy(EIS)monitoring,which overcomes the shortcomings of warning methods based on traditional signals such as temperature,gas,and pressure with obvious delay and high *** in-situ data acquisition through accelerating rate calorimeter(ARC)-EIS test,the crucial features of TR were extracted using the RReliefF *** mechanisms corresponding to the features at specific frequencies were ***,a three-level warning strategy for single battery,series module,and parallel module was formulated,which can successfully send out an early warning signal ahead of the self-heating temperature of battery under thermal abuse *** technology can provide a reliable basis for the timely intervention of battery thermal management and fire protection systems and is expected to be applied to electric vehicles and energy storage devices to realize early warning and improve battery safety.

关键词： Online EIS measurement Lithium-ion batterysafety Multistage thermal runaway early warning Sensitivityanalysis

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Validating the use of ROS-scavenging bacteria as probiotics to increase coral resilience to thermal stress

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Journal of Oceanology and Limnology 2024年第4期42卷 1242-1260页

作者： Xiaoyu TANG qingsong YANG Ying ZHANG Hanzhang WANG Juan LING Haiyan sun Junde DONG Yanying ZHANG CAS Key Laboratory of Tropical Marine Bio-resources and Ecology South China Sea Institute of Oceanology(SCSIO)Guangzhou 510301China Ocean School Yantai UniversityYantai 264005China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China Sanya National Marine Ecosystem Research Station and Key Laboratory of Tropical Marine Biotechnology of Hainan Province Sanya Institute of OceanologySCSIOSanya 572000China Institute of Deep-sea Science and Engineering Chinese Academy of SciencesSanya 572000China University of Chinese Academy of Sciences Beijing 100049China

Thermal stress causes the overproduction and toxic accumulation of reactive oxygen species(ROS),which seems to be correlated with coral bleaching and,ultimately,*** reduction of ROS concentration within the coral holobiont could minimize the effects of thermal stress and support efforts to reduce coral decline *** the current study,we explored the physiological responses of Pocillopora damicornis to ROS-scavenging bacteria inoculation as well as the microbiome restructuring that correlates with ***’s resilience to thermal stress after probiotic *** of corals with ROS-scavenging bacteria enhanced coral health and reduced ROS ***,the enhanced coral thermal resistance promoted by ROS-scavenging bacteria was also correlated with an overall coral microbiome *** addition,the complex network relationships between bacteria and Symbiodiniaceae in corals after ROS-scavenging bacteria inoculation contributed to corals’resilience to high ***,coral heat tolerance bacterial biomarkers,such as Myxococcota,were enriched in corals with added ROS-scavenging ***,our findings validate the selected ROS-scavenging bacteria as coral probiotics that could help corals resist thermal stress on a short ***,our data contribute to our understanding of the potential interactions between different members of the coral holobiont and the use of probiotics as tools to aid coral restoration efforts.

关键词： coral beneficial microorganisms for corals(BMCs) Symbiodiniaceae thermal stress coral bleaching

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