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A thermoresponsive composite separator loaded with paraffin@SiO_(2) microparticles for safe and stable lithium batteries

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Journal of Energy Chemistry 2021年第11期30卷 423-430,I0009页

作者： Hao Dong Peican Wang Shuaishuai Yan yingchun xia Baoguo Wang xiaolin Wang Kai Liu The State Key Laboratory of Chemical Engineering Department of Chemical EngineeringTsinglma UniversityBeijing 100084China

Lithium-ion batteries (LIBs)-related accidents have been reported for years and safety issues are stumbling blocks for the practical applications of lithium metal batteries (LMBs) with higher energy density. More effective strategies to shut down the battery at the early stage of thermal runaway with less side effects on the electrochemical performance are greatly desired. In this work, the core–shell structural paraffin@SiO_(2) microparticles were synthesized by in situ emulsion interfacial hydrolysis and polycondensation and the paraffin@SiO_(2)-loaded separator (PSS) was prepared by a facile filtration method. The introduction of hydrophilic silica shells in paraffin@SiO_(2) enhanced the wettability of carbonate electrolyte with the composite separator and improved the processability of soft paraffin. As a result, when used in LMBs at room temperature, the cell with PSS inside had a more uniform deposition of lithium, a much lower overpotential and a more stable electrochemical performance than the cell with the blank separator or the conventional pure paraffin-loaded separator inside. More significantly, when a heating stimulation (i.e. 115 ℃) was subjected to the cell with PSS inside, the paraffin in the core of paraffin@SiO_(2) could be released, blocking the gaps between particles and the pores in the separator and efficiently stopping the transportation of Li+ between two electrodes, resulting in the thermally-induced shutdown of the cell below the melting temperature of PE (~135 ℃) in the Celgard2325 separator. The core–shell structure of paraffin@SiO_(2) enables the maintaining of each component’s benefits while avoiding each one’s drawbacks by elaborating microstructural design. Therefore, the conventional dilemma between the electrochemcial performance and safety of LMBs could be solved in the future.

关键词： Thermally-induced shutdown Separator Paraffin@SiO_(2) Lithium batteries Safety Wettability

Regulating the growth of lithium dendrite by coating an ultra-thin layer of gold on separator for improving the fast-charging ability of graphite anode

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Journal of Energy Chemistry 2022年第4期31卷 467-473页

作者： Shuaishuai Yan xiaoxia Chen Pan Zhou Peican Wang Hangyu Zhou Weili Zhang yingchun xia Kai Liu The State Key Laboratory of Chemical Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

With the ever-growing application of lithium-ion batteries(LIBs), their fast-charging technology has attracted great interests of scientists. However, growth of lithium dendrites during fast charge of the bat teries with high energy density may pose great threats to the operation and cause serious safety issues Herein, we prepared a functional separator with an ultra-thin(20 nm) layer of Au nanoparticles deposited by evaporation coating method which could regulate growth direction and morphology of the lithium dendrites, owing to nearly zero overpotential of lithium meal nucleation on lithiated Au. Once the Li den drites are about to form on the graphite anode during fast charging(or lithiation), they plate predomi nantly on the Au deposited separator rather than on the graphite. Such selective deposition does no compromise the electrochemical performance of batteries under normal cycling. More importantly, i enables the better cycling stability of batteries at fast charge condition. The Li/Graphite cells with Au nanoparticles coated separator could cycle stably with a high areal capacity retention of 90.5% over 95 cycles at the current density of 0.72 m A cm^(-2). The functional separator provides an effective strategy to adjust lithium plating position at fast charge to ensure high safety of batteries without a compromise on the energy density of LIBs.

关键词： Fast-charging Functional separator Lithium-ion batteries Dendrites Safety

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经筋疗法在康复医学中的应用构架及模式研究

中国针灸 2024年第8期44卷 865-870页

作者：张峰董宝强富昱林星星王树东吴锡张丹凝夏迎春齐畅辽宁中医药大学针灸推拿学院沈阳110847

经筋疗法与康复医学具有共通性和互补性,基于康复视域下的经筋疗法应用可拓宽中医康复学的发展路径。笔者结合相关文献资料、研究成果对经筋辨证针刺与康复评定治疗的联系内容进行阐释,论述经筋治未病理论在康复防治疾病的应用框架,从... 详细信息

经筋疗法与康复医学具有共通性和互补性,基于康复视域下的经筋疗法应用可拓宽中医康复学的发展路径。笔者结合相关文献资料、研究成果对经筋辨证针刺与康复评定治疗的联系内容进行阐释,论述经筋治未病理论在康复防治疾病的应用框架,从中西医结合的视角展望经筋康复医学的研究模式,完善经筋疗法的康复应用思维,丰富中医康复医学的运用方法和治疗思路。

关键词：经筋疗法康复医学应用框架模式研究

Theoretical energy consumption analytical method for metal separation process

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Journal of Thermal Science 2010年第4期19卷 377-382页

作者： Dehong xia,yingchun SHANG,Ling REN and Yifan LI Department of Thermal Engineering,University of Science and Technology Beijing,Beijing 100083 Department of Thermal Engineering University of Science and Technology Beijing Beijing China

The theoretical energy consumption(TEC)analytical methods and the calculated models for the electrolytic and thermal reduction metal separation processes have been put forward based on thermodynamics and physical chemistry principles,providing theoretical foundation for choosing the optimum metal separation *** on the models,the TECs of the Mg separation processes are taken as an example,and have been calculated and analyzed contrastively,including the MgCl_2 electrolytic method,the MgO electrolytic method with inert electrode and with carbon anode,and the silicothermic *** is shown that the thermal method is more reasonable than the electrolytic methods to separate Mg under low efficiency of coal power generation.

关键词： metal separation theoretical energy consumption electrolysis thermal reduction

Zwitterionic Matrix with Highly Delocalized Anionic Structure as an Efficient Lithium Ion Conductor

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CCS Chemistry 2023年第7期5卷 1612-1622页

作者： Shuaishuai Yan Yang Lu Fengxiang Liu yingchun xia Qiao Li Kai Liu State Key Laboratory of Chemical Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084

The leakage and volatilization of liquid electrolytes raise potential safety risks in the development of electrochemical energy storage devices with high energy ***,novel solid-state zwitterionic materials containing sulfonyl imide as a highly delocalized anionic structure were synthesized for highly targeted lithium ion conducting *** influences of the molecular structure characteristics on thermal behavior and electrochemical property were investigated *** to the weak Coulomb interaction between the sulfonyl imide moiety and cationic species,the rationally designed zwitterionic electrolytes showed a high conductivity of 0.44 mS cm^(-1).And the obtained high lithium ion transference number of 0.43 is four times higher than that of the widely employed sulfonate ***,excellent cycling stability of the lithium plating/stripping process and super resistance to electrochemical oxidation(up to 5.5 V)were *** molecular engineering strategy for lithium ion conductor advances new possibilities for developing solvent-free and non-migrating electrolyte matrix materials for lithium metal batteries.

关键词： zwitterion ion conductor energy storage electrolyte lithium battery

基于遗传算法和分枝定界的多车间空闲产能调度方法

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机械工程学报 2022年第22期58卷 462-472页

作者：谢志强夏迎春哈尔滨理工大学计算机科学与技术学院哈尔滨150080

个性化产品具有多变的产品结构和复杂的加工特征,使得单一车间难以满足如此广泛的加工参数,需要借助外协车间才能完成生产任务。每个外协车间负载不同,空闲时段也不同,为了提升这些时间的利用率,提出基于遗传算法和分枝定界的混合调度... 详细信息

个性化产品具有多变的产品结构和复杂的加工特征,使得单一车间难以满足如此广泛的加工参数,需要借助外协车间才能完成生产任务。每个外协车间负载不同,空闲时段也不同,为了提升这些时间的利用率,提出基于遗传算法和分枝定界的混合调度方法。设计基于混合优化策略的动态重调度机制,将动态的生产过程转化为一系列在时间上连续的静态调度问题;建立以最小化总拖期为目标的数学模型;采用遗传算法和分枝定界方法对调度过程中的两个阶段分别进行优化,即在每个事件时刻采用遗传算法生成预调度方案并划分为已派工部分、待派工部分和可调整部分,在已派工部分正在执行的时间段采用分枝定界方法对可调整部分进行改进优化。采用运筹学优化器OR-Tools验证所提模型的正确性。试验数据表明,与单一方法相比,混合方法在所有实例上获得改进,验证了所提方法是有效可行的。

关键词：个性化产品多车间空闲产能树状约束关系动态调度

巯基-烯点击化学法制备还原响应两亲性聚合物

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湖南大学学报（自然科学版） 2017年第6期44卷 96-100页

作者：卢彦兵谢元彬夏迎春湖南大学化学化工学院湖南长沙410082

以胱胺二盐酸盐、氯甲酸烯丙酯、1,6-己二硫醇及端巯基聚乙二醇单甲醚等为原料,通过巯基-烯点击化学反应,合成了疏水段含二硫键的两亲性三嵌段共聚物mPEG-bP1-b-mPEG.对mPEG-b-P1-b-mPEG在水溶液中的自组装行为进行了深入的研究.结果表... 详细信息

以胱胺二盐酸盐、氯甲酸烯丙酯、1,6-己二硫醇及端巯基聚乙二醇单甲醚等为原料,通过巯基-烯点击化学反应,合成了疏水段含二硫键的两亲性三嵌段共聚物mPEG-bP1-b-mPEG.对mPEG-b-P1-b-mPEG在水溶液中的自组装行为进行了深入的研究.结果表明,mPEG-b-P1-b-mPEG的临界胶束浓度为0.032 mg/mL,形成胶束的平均粒径为61.3nm.包载模拟药物尼罗红的释放行为研究表明,在D,L-二硫苏糖醇(DTT)存在的条件下,包裹在胶束中的尼罗红可以被释放出来,显示出快速的还原响应性能,表明合成的两亲性三嵌段共聚物mPEG-b-P1-b-mPEG有望作为疏水性药物载体,应用于药物控释领域.

关键词：两亲性聚合物巯基-烯点击化学还原响应性胶束药物控释

1767例住院患者使用前列地尔注射液回顾性调查

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中国药师 2014年第9期17卷 1541-1543页

作者：夏迎春温州市中医院药剂科浙江温州325000

目的:了解某院前列地尔注射液的使用情况,以促进合理用药。方法:回顾性调查某院2013年住院患者使用前列地尔注射液的病例,共计1 767例,对其临床主要诊断、用法用量、使用疗程、不良反应等方面进行统计分析。结果:前列地尔注射液在临床... 详细信息

目的:了解某院前列地尔注射液的使用情况,以促进合理用药。方法:回顾性调查某院2013年住院患者使用前列地尔注射液的病例,共计1 767例,对其临床主要诊断、用法用量、使用疗程、不良反应等方面进行统计分析。结果:前列地尔注射液在临床各科室使用广泛,应用最多的是脑病科、肾内科。临床不合理用药主要表现在适应证不适宜、用法用量不当、疗程过长、溶媒选择错误等。结论:前列地尔注射液不规范使用的情况须引起重视。用药调查分析对指导临床合理用药具有非常重要意义。

关键词：前列地尔注射液住院患者回顾性调查

Development of Integrated Platform for Training Simulator

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Development of Integrated Platform for Training Simulator