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Designing of multifunctional and flame retardant separator towards safer high-performance lithium-sulfur batteries

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Nano Research 2021年第12期14卷 4865-4877页

作者： Junling Wang Wei Cai Xiaowei Mu Longfei Han Na Wu can liao Yongchun Kan Yuan Hu State Key Laboratory of Fire Science CAS Key Laboratory of Soft Matter ChemistryUniversity of Science and Technology of ChinaHefei230026China Jiangsu Key Laboratory of Hazardous Chemicals Safety and Control College of Safety Science and EngineeringNanjing Tech UniversityNanjing211816China

Owing to unprecedented merits such as high theoretical capacity,superior energy density and low cost,lithium-sulfur batteries(LSBs)show a bright future both in scientific and industrial ***,the inherent issues,including highly insulating character,undesired shuttle behavior and lithium dendrites growth,are seriously impeding its practical ***,a metal-organic-frameworks(MOFs)derived N,S co-doped carbon nanotube hollow architecture confining with CoS_(2) nanoparticles(CoS_(2)/NSCNHF)modified separator is designed to surmount these *** with Celgard separator,this designed separator shows obviously enhanced flame retardancy,giving 73.1%and 53.0%reductions in peak heat release rate and total heat release,***,its hollow structure,conductive feature,electrocatalytic activity and Lewis acid-base interaction enable the efficient inhibition on shuttle behavior as well as boost in polysulfides conversion *** cell with modified separator delivers a high discharge capacity of 1,284.5 mAh·g^(−1).After running for 100 cycles,a discharge capacity of 661.3 mAh·g^(−1) is ***,the suppression on lithium dendrites growth is also observed,manifesting the enhanced battery ***,this work may shed light on the effective usage of MOFs-derived hierarchical composite in achieving LSBs with high electrochemical performance as well as safety.

关键词： metal-organic-frameworks shuttle behavior lithium dendrites flame retardancy

A flame retardant separator modified by MOFs-derived hybrid for safe and efficient Li-S batteries

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Journal of Energy Chemistry 2022年第1期31卷 372-384,I0010页

作者： Na Wu Junling Wang can liao Longfei Han Lei Song Yuan Hu Xiaowei Mu Yongchun Kan State Key Laboratory of Fire Science.CAS Key Laboratory of Soft Matter Chemistry University of Science and Technology of ChinaHefei 230026AnhuiChina Jiangsu Key Laboratory of Hazardous Chemicals Safety and Control College of Safety Science and EngineeringNanjing Tech UniversityNanjing 211816JiangsuChina

In this work,we have successfully prepared a novel separator modified with N,S co-doped carbon framework(named NSPCF)with confined CoS_(2) nanoparticles and rooted carbon nanotubes material(named NSPCF@CoS_(2))to apply for high-performance Lithium-Sulfur batteries(Li-S batteries).Robust carbon structure with large specific surface can act as a physical barrier and possess physical adsorption effect on lithium polysulfides(LiPSs).In addition,highly-conductive carbon can improve integral conductivity,leading to the fast charge transport and reaction ***,doping heteroatoms could form more active sites to adsorb LiPSs strongly so that modified separator could inhibit the shuttle effect ***,the presence of CoS_(2) further enhances the ability of modified separator to trap LiPSs owing to the Lewis acid-base *** a result,the NSPCF@CoS_(2)@C-150 battery can deliver initial discharge capacities of 863.0,776.2,649.1 and 489.4 mAh g^(-1) at 0.1,0.5,1 and 2C with a high sulfur loading of 2.04 mg cm^(-2),***,when turning the current density back to 0.1 C,its discharge capacity can recover to 1008.7 mAh g^(-1).In addition,the modified separators exhibit outstanding capacities to restrain the growth of lithium *** is noteworthy that the flame retardant performances of Li-S batteries are improved dramatically owing to the novel structures of modified *** rationally designed separator endows Li-S batteries with higher safety and excellent electrochemical performances,providing a feasible strategy for practical application of Li-S batteries.

关键词： Metal-organic frameworks Shuttling behavior Lithium dendrites Safety

Magnetron sputtering deposition of silicon nitride on polyimide separator for high-temperature lithium-ion batteries

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Journal of Energy Chemistry 2021年第5期30卷 1-10页

作者： can liao Wei Wang Junling Wang Longfei Han Shuilai Qiu Lei Song Zhou Gui Yongchun Kan Yuan Hu State Key Laboratory of Fire Science University of Science and Technology of ChinaHefei 230026AnhuiChina

To date,lithium-ion batteries are becoming increasingly significant in the application of portable devices and electrical vehicles,and revolutionary progress in theoretical research and industrial application has been ***,the commercial polyolefin separators with unsatisfying electrolytes affinity and poor thermal stability have extremely restricted the further application of lithium-ion batteries,especially in the high-temperature *** this work,magnetron sputtering deposition technique is employed to modify the commercial polyimide separator by coating silicon nitride on both *** sputtering deposition modified polyimide(MSD-PI)composite separator shows high thermal stability and ionic *** importantly,compared with the cells using Celgard separator,the cells with MSD-PI separator exhibit superior electrochemical performance,especially long-term cycle performance under high temperature environment,owing to the high thermal conductivity of surface Si3 N4 ***,lithium-ion batteries with MSD-PI separator are capable of improving thermal safety and capacity retention,which demonstrates that magnetron sputtering deposition technique could be regarded as a promising strategy to develop advanced organic/inorganic composite separators for high-temperature lithium-ion batteries.

关键词： Polyimide Magnetron sputtering deposition Lithium-ion batteries High temperature Safety

Sandwich structured ultra-strong-heat-shielding aerogel/copper composite insulation board for safe lithium-ion batteries modules

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Journal of Energy Chemistry 2023年第1期76卷 438-447,I0011页

作者： Heng Yu Xiaowei Mu Yulu Zhu can liao Longfei Han Jingwen Wang Wei Cai Yongchun Kan Lei Song Yuan Hu State Key Laboratory of Fire Science University of Science and Technology of ChinaHefei 230027AnhuiChina Department of Chemical Engineering University of Massachusetts Amherst01003MAUSA

The fire hazard of lithium-ion batteries(LIBs)modules is extremely serious due to their high ***,once a battery catches fire,it can easily result in a fire of the entire LIBs *** this work,a sandwich structure composite thermal insulation(STI)board(copper//silica dioxide aerogel//copper)with the advantages of low thermal conductivity(0.031 W m-1K-1),low surface radiation emissivity(0.1)and good thermal convection inhibition effect has been *** thermal runaway(TR)occurrence time of adjacent LIBs increases from 1384 s to more than 6 h+due to the protection of STI *** TR propagation occurs within LIBs modules with protect of a STI board when a battery catches *** ultra-strong-heat-shielding mechanism of STI board has been *** TR propagation of LIBs modules has been insulated effectively by STI board through reducing the heat transfer of convection,conduction and *** air flow rate between the heater and LIBs and radiant heat absorbed by LIBs decrease by 63.5%and 35.1%with protection of STI board,respectively.A high temperature difference inside the STI board is also *** work provides direction for the designing of safe thermal insulation board for LIBs modules.

关键词： Insulation board Ultra-strong-heat-shielding Lithium-ion battery modules Thermal runaway propagation Mechanism

体用互余:论方以智易学哲学的“四分用三”说

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周易研究 2018年第4期 31-38页

作者：廖璨璨武汉大学哲学学院湖北武汉430072

方以智易学哲学中的"四分用三"说是对邵雍先天易学"体四用三"说的继承和发展。他区分了"有体之体"和"无体之体"、"有用之用"和"无用之用",并基于体用的两层内涵提出"体用互余",强调体用相对待之中有统贯体用的无对待之至体。同时,体用... 详细信息

方以智易学哲学中的"四分用三"说是对邵雍先天易学"体四用三"说的继承和发展。他区分了"有体之体"和"无体之体"、"有用之用"和"无用之用",并基于体用的两层内涵提出"体用互余",强调体用相对待之中有统贯体用的无对待之至体。同时,体用交轮体现为"一其体用",这是方以智对《系辞传》"易无体"而"以前民用"的诠释。方氏的体用思想与其"先天即在后天中"的易学主张是一致的,其目的在于纠正阳明后学以先天之本体而废后天之工夫的流弊,强调后天之时用。

关键词：方以智四分用三余体用先天后天

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至善统善恶:方以智与晚明无善无恶之辨

中山大学学报（社会科学版） 2022年第6期62卷 88-95页

作者：廖璨璨武汉大学哲学学院武汉430072

“至善”与“无善无恶”是中晚明思想史上的重要论辩,明末思想家方以智以“至善统善恶”这一命题对王阳明的“无善无恶是谓至善”说做出了诠释和辩护,该命题中蕴含的对“绝待”和“对待”关系的思考也是对宋代理学中朱熹与胡宏论性之善... 详细信息

“至善”与“无善无恶”是中晚明思想史上的重要论辩,明末思想家方以智以“至善统善恶”这一命题对王阳明的“无善无恶是谓至善”说做出了诠释和辩护,该命题中蕴含的对“绝待”和“对待”关系的思考也是对宋代理学中朱熹与胡宏论性之善恶的继承和发展,即通过对道/理是否有对待来解释至善之性是否有对待,以形上建构的方式对晚明这一论争做出回应。一方面作为“绝待”的“至善”不落于具体相对待的善恶,也即“无善无恶”,这是从形上本体的层面言说;另一方面作为本体的“无善无恶”是先天之性,有善有恶是后天之性,统贯先天后天的“至善”意味着在具体现实的人性善恶之中要让本体的善性显露出来,这是从本然状态的层面言说。“至善统善恶”说以对“至善”的强调纠正阳明后学特别是王畿“四无”说导致的走空蹈虚之流弊,重新倡导价值层面上对“至善”的肯认,推崇实学的功夫论指向。

关键词：方以智阳明学至善无善无恶实学

Analysis of Chinese women with primary ovarian insufficiency by high resolution array-comparative genomic hybridization

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Chinese Medical Journal 2011年第11期000卷 1739-1742页

作者： liao can FU Fang YANG Xin SUN Yi-min LI Dong-zhi Department of Medical Genetics and Prenatal Diagnostic Center Guangzhou Women and Children's Medical Center GuangzhouMedical College Guangzhou Guangdong 510623 China Medical College Guangzhou Guangdong 510623 China

Background Primary ovarian insufficiency （POI） is defined as a primary ovarian defect characterized by absent menarche （primary amenorrhea） or premature depletion of ovarian follicles before the age of 40 years. The etiology of primary ovarian insufficiency in human female patients is still unclear. The purpose of this study is to investigate the potential genetic causes in primary amenorrhea patients by high resolution array based comparative genomic hybridization （array-CGH） analysis. Methods Following the standard karyotyping analysis, genomic DNA from whole blood of 15 primary amenorrhea patients and 15 normal control women was hybridized with Affymetrix cytogenetic 2.7M arrays following the standard protocol. Copy number variations identified by array-CGH were confirmed by real time polymerase chain reaction.

关键词： primary ovarian insufficiency array based comparative genomic hybridization technology NSF gene deletion

基于最大似然的同频混合信号联合定时估计算法

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系统工程与电子技术 2010年第6期32卷 1121-1124页

作者：廖灿辉周世东朱中梁清华大学微波与数字通信国家重点实验室北京100084 信号盲处理国防科技重点实验室四川成都610041

针对同频干扰下的混合信号时延估计问题进行研究,提出了一种基于最大似然准则的联合定时估计算法。该算法在推导似然函数的基础上,采用分级搜索方法估计信号时延,能同时实现干扰信号与有用信号的联合定时。相比传统的单信号时延估计,该... 详细信息

针对同频干扰下的混合信号时延估计问题进行研究,提出了一种基于最大似然准则的联合定时估计算法。该算法在推导似然函数的基础上,采用分级搜索方法估计信号时延,能同时实现干扰信号与有用信号的联合定时。相比传统的单信号时延估计,该算法需要有更长的观测数据长度;算法对频偏误差不敏感,在归一化频偏(相对于符号速率)小于2%时性能损失很小。仿真结果验证了算法的有效性。

关键词：定时估计同频干扰最大似然分级搜索

从人力资源优化看职业院校师资培训的质效提升

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教育理论与实践 2019年第27期39卷 28-31页

作者：廖兴灿河南警察学院交通管理工程系

产业转型的迅速发展对职业院校教师水平以及师资队伍建设提出了更高要求,教师的理论与实践能力培养成为人力资源优化发展的决定性因素。职业院校师资培训的质效主要体现在通过管理培训增强教师组织力,通过优化模式实现资源利用率提升,... 详细信息

产业转型的迅速发展对职业院校教师水平以及师资队伍建设提出了更高要求,教师的理论与实践能力培养成为人力资源优化发展的决定性因素。职业院校师资培训的质效主要体现在通过管理培训增强教师组织力,通过优化模式实现资源利用率提升,通过调整结构实现教师协同性提升三个方面。从组织、个人、工作三个层次的教育实践来看,人力资源优化是职业院校师资培训的重要导向,也是提升培训质效的重要切入点。必须从优化培训体系功能定位、建立多元主体协同机制、完善教育培训评价体系等三个方面入手,着力提升优质供给内力、形成联动协调合力、增强资源发展动力,才能真正实现职业院校师资培训的质效提升。

关键词：职业院校人力资源师资培训质效提升协同机制