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Enhancement of in-plane thermal conductivity of flexible boron nitride heat spreaders by micro/nanovoid filling using deformable liquid metal nanoparticles

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Rare Metals 2023年第11期42卷 3662-3672页

作者： Pei-Di Tao Shao-Gang Wang Lu Chen Jun-Feng Ying Le Lv li-Wen Sun Wu-Bo Chu Kazuhito Nishimura li Fu Yue-Zhong Wang Jin-Hong Yu Nan Jiang Wen Dai Yao-Kang Lv Cheng-Te lin Qing-Wei Yan College of Chemical Engineering Zhejiang University of TechnologyHangzhou310058China qianwan Institute Ningbo Institute of Materials Technology and Engineering(NIMTE)Chinese Academy of SciencesNingbo315201China Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingboInstitute of Materials Technology and Engineering(NIMTE)Chinese Academy of SciencesNingbo315201China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China Advanced Nano-Processing Engineering Lab Mechanical Systems EngineeringKogakuin UniversityTokyo192-0015Japan College of Materials and Environmental Engineering Hangzhou Dianzi UniversityHangzhou310018China

With the fast development of integrated circuit devices as well as batteries with high energy densities,the thermal management of electronic components is becoming increasingly crucial to maintaining their reliable *** nitride nanosheets(BNNS),which have superhigh thermal conductivity along the in-plane direction while remaining electrically insulating,were widely regarded as an ideal filler for preparing high-performance polymer composites to address the‘‘thermal failure''***,due to the instinctive rigidity of BNNS,the nanosheets are unable to form a tightly interfacial contact between the adjoining fillers,resulting in some micro-and nanovoids within the heat transfer pathways and severely limiting further thermal conductivity enhancement for BNNS-based ***,soft and deformable liquid metal(eutectic gallium-indium,EGaIn)nanoparticles were employed to fill the gaps between the adjacent BNNS with a rational design of mass ratios of BNNS and EGaIn,leading to a strongly synergistic effect with BNNS on thermal conductivity *** a result,the composite film(BNNS:63 wt%and EGaIn:7 wt%)employing cellulose nanofibers(CNF:30 wt%)as the polymer matrix achieves superhigh thermal conductivity along the in-plane direction of up to(90.51±6.71)W·m^(-1)·K^(-1),showing the highest value among the BNNSbased composites with a bi-filler system as far as we ***,the film can work as a heat spreader for the heat dissipation of high-power light emitting diodes,outperforming tin foil in cooling efficiency.

关键词： Boron nitride nanosheet liquid metal Eutectic gallium-indium In-plane thermal conductivity Heat spreader

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Molten Salt-Shielded Synthesis(MS^(3))of MXenes in Air

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Energy & Environmental Materials 2023年第2期6卷 159-164页

作者： Jinjin Chen Qianqian Jin Youbing li Hui Shao Pengcheng liu Ying liu Pierre-Louis Taberna Qing Huang Zifeng lin Patrice Simon College of Materials Science and Engineering Sichuan UniversityChengdu 610065China Materials Science and Engineering Research Center Guangxi University of Science and TechnologyLiuzhou 545006China Engineering Laboratory of Advanced Energy Materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China qianwan Institute of CNiTECH Zhongchuangyi RoadHangzhou Bay DistrictNingbo 315336China CIRIMAT Universit´e de ToulouseCNRSToulouse 31400France R´eseau sur le Stockage Electrochimique de l’Energie(RS2E)FR CNRS no 3459 Engineering Research Center of Alternative Energy Materials&Devices Ministry of EducationChina

MXenes are two-dimensional transition metal carbides and/or nitrides with unique physiochemical properties and have attracted extensive interest in numerous ***,current MXene synthesis methods are limited by hazardous synthesis conditions,high production costs,or difficulty in largescale ***,a general,safe,cost-effective,and scalable synthesis method for MXenes is ***,we report the fast synthesis of MXenes in the open air using a molten salt-shielded synthesis(MS^(3))method,which uses Lewis-acid salts as etchants and a low-melting-point eutectic salt mixture as the reaction medium and shield to prevent MXene oxidation at high *** and nitride MXenes,including Ti_(3)C_(2)T_(x),Ti_(2)CT_(x),Ti_(3)CNT_(x),and Ti_(4)N_(3)T_(x),were successfully synthesized using the MS^(3) *** also present the flexibility of the MS^(3) method by scaling the etching process to large batches of 20 and 60 g of Ti_(3)AlC_(2) MAX precursor in one *** used as negative electrodes,the prepared MS^(3)-MXenes delivered excellent electrochemical properties for high-rate li-ion storage.

关键词： carbides lithium-ion storage molten salt synthesis MXene nitrides

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Electrochemical lithium Storage Performance of Molten Salt Derived V_(2)SnC MAX Phase

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Nano-Micro Letters 2021年第10期13卷 266-275页

作者： Youbing li Guoliang Ma Hui Shao Peng Xiao Jun Lu Jin Xu Jinrong Hou Ke Chen Xiao Zhang Mian li Per OÅPersson Lars Hultman Per Eklund Shiyu Du Zhifang Chai Zhengren Huang Na Jin Jiwei Ma Ying liu Zifeng lin Qing Huang Engineering Laboratory of Advanced Energy Materials Ningbo Institute of Industrial TechnologyChinese Academy of SciencesNingbo 315201ZhejiangPeople’s Republic of China qianwan Institute of CNiTECH Ningbo 315336People’s Republic of China College of Materials Science and Engineering Sichuan UniversityChengdu 610065People’s Republic of China CIRIMAT UMR CNRS 5085 UniversitéToulouse III-Paul Sabatier118 route de Narbonne31062 Toulouse Cedex 9France Department of Physics Chemistry and Biology(IFM)Linköping University58183 LinköpingSweden School of Machine Engineering Dongguan University of TechnologyDongguan 523808People’s Republic of China Institute of New Energy for Vehicles School of Materials Science and EngineeringTongji UniversityShanghai 201804People’s Republic of China

MAX phases are gaining attention as precursors of two-dimensional MXenes that are intensively pursued in applications for electrochemical energy ***,we report the preparation of V_(2)SnC MAX phase by the molten salt method.V_(2)SnC is investigated as a lithium storage anode,showing a high gravimetric capacity of 490 mAh g−1 and volumetric capacity of 570 mAh cm^(−3) as well as superior rate performance of 95 mAh g^(−1)(110 mAh cm^(−3))at 50 C,surpassing the ever-reported performance of MAX phase ***-ported by operando X-ray diffraction and density functional theory,a charge storage mechanism with dual redox reaction is proposed with a Sn-li(de)alloying reaction that occurs at the edge sites of V_(2)SnC particles where Sn atoms are exposed to the electrolyte followed by a redox reaction that occurs at V_(2)C layers with *** study offers promise of using MAX phases with M-site and A-site elements that are redox active as high-rate lithium storage materials.

关键词： MAX phase Molten salt lithium storage High-rate Energy storage

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Main group metal elements for ambient-condition electrochemical nitrogen reduction

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Journal of Energy Chemistry 2021年第11期30卷 51-70,I0002页

作者： Ying Sun Yu Wang Hui li Wei Zhang Xi-Ming Song Da-Ming Feng Xiaodong Sun Baohua Jia Hui Mao Tianyi Ma Institute of Clean Energy Chemistry Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials of Liaoning ProvinceCollege of ChemistryLiaoning UniversityShenyang 110036LiaoningChina Centre for Translational Atomaterials Faculty of ScienceSwinburne University of TechnologyHawthornVIC 3122Australia

Electrocatalytic N_(2) reduction under ambient-condition is considered to be the most appealing strategy to the conventional Haber-Bosch process for synthetic ammonia to alleviate greenhouse emissions and reduce environmental pollution, mainly powered by renewable energy. Recent years, rapid advances have been gained in this attractive research field, and numerous electrocatalysts have been exploited. However, its conversion efficiency is still far behind the requirement of industrial applications owing to the breakage of the N≡N triple bond, which is an energetically challenging kinetically complex multistep reaction and the strong competing reaction of hydrogen evolution reaction. Recently, main group metal-based catalysts have been demonstrated promising application prospect for ammonia production, significantly boosting their further application in this field. However, a comprehensive review of main group metal-based catalysts towards electrochemical ammonia production applications is still lacking. In this review, the fundamentals of N_(2) reduction, such as the reaction pathways, the reaction potential and the challenges of N_(2) reduction have been comprehensively discussed. And then, the role, mechanism, and effect of each main group element-based catalysts used for N_(2) reduction (li, K, Al, Ga, Sn, Sb, Bi, and their compounds) are systematically summarized. Finally, several state-of-the-art strategies to promote their NRR catalytic performance, as well as the existing problems and prospects are put forward. This review is expected to guide the design and establishment of more efficient electrocatalytic N_(2) reduction systems based on main group metal elements in the future.

关键词： N2 reduction Main group Metal elements Challenges and strategies

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无机材料的“化学剪刀”结构编辑策略

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无机材料学报 2024年第2期39卷 115-128页

作者：丁浩明陈科李勉李友兵柴之芳黄庆中国科学院宁波材料技术与工程研究所先进能源材料工程实验室宁波315201 宁波杭州湾新材料研究院宁波315336 苏州大学苏州医学院放射医学与防护学院苏州215123

受到生物基因工程中“基因剪刀”的启发,“化学剪刀”作为一种重要的研究工具在材料结构编辑及应用研究中发挥着重要作用。本文对“化学剪刀”在材料结构编辑及应用方面的研究进展进行了评述。首先,介绍了“化学剪刀”的概念和基本原理... 详细信息

受到生物基因工程中“基因剪刀”的启发,“化学剪刀”作为一种重要的研究工具在材料结构编辑及应用研究中发挥着重要作用。本文对“化学剪刀”在材料结构编辑及应用方面的研究进展进行了评述。首先,介绍了“化学剪刀”的概念和基本原理,即指在保持初始材料主结构不变的条件下,通过化学反应敲除、置换、修复或重构目标原子或结构单元,从而定制化编辑材料晶格中的组成元素、晶体结构以及微观形貌,最终实现特定的材料结构与功能。随后,详细回顾了“化学剪刀”在材料结构编辑中的具体应用,即如何利用化学剪切、化学修饰、化学合成和化学刻蚀与化学插层等结构编辑方法对材料结构进行精确调控和功能设计。最后,对“化学剪刀”未来在材料结构编辑及应用的研究方向进行了展望。本评述详细介绍了“化学剪刀”在材料结构编辑及应用研究方面的研究进展和巨大潜力,为探索和开发“化学剪刀”在材料领域的应用提供了有力的理论和实验支撑,并有望推动相关材料领域的发展。

关键词：化学剪刀无机材料结构编辑专题评述

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Research on Control Strategy and Experiment of Hybrid Crane

Research on Control Strategy and Experiment of Hybrid Crane

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第40届中国控制会议

作者： Chuanhao li Wei Zhang Yanchun Wang Bo li Xiuliang Sun Chunjiang liu Qingdao New qianwan Container Terminal Co. Ltd.

Under the strategic background that all countries in the world are seeking sustainable development, all countries in the world are constantly studying the hybrid control strategy of port cranes to reduce their energy consumption. This paper takes the port 40.5 T gantry crane as the research object, configures a reasonable energy storage-super capacitor, and proposes a super capacitor DC charging control strategy and a DC bus voltage control strategy based on the super capacitor voltage *** simulation analysis and potential energy feedback experiment are carried out for the formulated control strategy. The results show the platform’s outstanding performance that the total efficiency can reach 90% and the actual energy used by the super capacitor of the hybrid power system can reach 60% in one operation cycle.

关键词： Super capacitor Hybrid power Gantry crane Control strategy Experimental research

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青岛港前湾港区集装箱堆场作业系统节能减排改造工程装卸工艺设计

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水运工程 2011年第B9期 109-112页

作者：李刚肖丽君中交水运规划设计院有限公司北京100007

青岛港前湾集装箱工程2010年集装箱吞吐量为1 021万TEU,是我国乃至世界上最繁忙的集装箱码头之一。通过对柴油RTG改造成为电动RTG工程的实施,大大减少了港区柴油消耗量,减少CO2、SO2等有害气体的排放,达到节能减排的目的。介绍前湾二期... 详细信息

青岛港前湾集装箱工程2010年集装箱吞吐量为1 021万TEU,是我国乃至世界上最繁忙的集装箱码头之一。通过对柴油RTG改造成为电动RTG工程的实施,大大减少了港区柴油消耗量,减少CO2、SO2等有害气体的排放,达到节能减排的目的。介绍前湾二期、三期部分箱区"油改电"改造工程的技术方案,并对节能效果进行分析。

关键词：轮胎式集装箱龙门吊(RTG) 滑触线油改电节能减排

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M位与A位双固溶MAX相的磁学性能研究

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无机材料学报 2021年第12期36卷 1247-1255页

作者：张霄李友兵陈科丁浩明陈露李勉史蓉蓉柴之芳黄庆兰州大学物理科学与技术学院磁学与磁性材料教育部重点实验室光转换材料与技术国家地方联合工程实验室兰州730000 中国科学院宁波材料技术与工程研究所先进能源材料工程实验室宁波315201 宁波材料所杭州湾研究院宁波315336

三元层状化合物MAX相兼具金属与陶瓷优良的力学性质,通常被认为是一类高安全结构材料。有研究显示,通过熔盐法可以将副族元素插入到MAX相A位层间,获得具有铁磁性能的V_(2)(Sn,A)C(A=Fe、Co、Ni和Mn)材料。因而,如何构建新的MAX相结构并... 详细信息

三元层状化合物MAX相兼具金属与陶瓷优良的力学性质,通常被认为是一类高安全结构材料。有研究显示,通过熔盐法可以将副族元素插入到MAX相A位层间,获得具有铁磁性能的V_(2)(Sn,A)C(A=Fe、Co、Ni和Mn)材料。因而,如何构建新的MAX相结构并实现其磁性调控备受关注。本研究通过MAX相M位和A位双固溶的方式设计了四种新型MAX相(V,Nb)_(2)(Sn,A)C(A=Fe、Co、Ni和Mn)。XRD、SEM、EDS结合TEM分析证实了上述新相的合成。超导量子磁强计(Superconducting quantum interference device magnetometer,SQUID)测试磁学性能发现,M位固溶后的MAX相的居里温度与其四方率(c/a)、元素组成有关。(V,Nb)_(2)(Sn,Fe)C、(V,Nb)_(2)(Sn,Ni)C、(V,Nb)_(2)(Sn,Mn)C相较于M位固溶Nb元素之前的V_(2)(Sn,A)C相,其矫顽力Hc和剩余磁化强度M_(r)减小,饱和磁化强度M_(s)增大。而V_(2)(Sn,Co)C在M位固溶Nb元素之后磁性变化均与前述MAX相相反。通过以上结果,揭示了M/A位双固溶对MAX相磁性的影响规律,为调控MAX相磁性提供了新的思路。

关键词： MAX相双固溶磁性

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熔盐法合成纳米层状Sc_(2)SnC MAX相

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无机材料学报 2021年第7期36卷 773-778页

作者：李友兵秦彦卿陈科陈露张霄丁浩明李勉张一鸣都时禹柴之芳黄庆中国科学院宁波材料技术与工程研究所新能源技术研究所宁波315201 中国科学院宁波材料技术与工程研究所杭州湾研究院宁波315201

MAX相是一类兼具金属和陶瓷特性的三元层状材料,也是合成二维MXenes的前驱体材料。理论预测稳定的三元层状MAX相材料约有600余种,目前实验合成的三元层状MAX相材料已有80余种,但M位主要为前过渡族金属,而对M为稀土元素的三元MAX相鲜有... 详细信息

MAX相是一类兼具金属和陶瓷特性的三元层状材料,也是合成二维MXenes的前驱体材料。理论预测稳定的三元层状MAX相材料约有600余种,目前实验合成的三元层状MAX相材料已有80余种,但M位主要为前过渡族金属,而对M为稀土元素的三元MAX相鲜有报道。本研究以Sc、Sn,和C元素粉为原料,通过熔盐法合成了M位为稀土元素Sc的全新Sc_(2)SnC MAX相材料。结合X射线衍射、扫描电子显微镜和X射线能谱等分析手段,确认Sc_(2)SnC MAX的相组成和微观结构。并通过密度泛函理论计算了Sc_(2)SnC MAX相的结构稳定性、晶格参数、力学和电子性质,理论计算结果表明Sc_(2)SnC热力学稳定,Sc-3d电子在费米能级上占主导地位,MAX相呈金属性质。

关键词： MAX相纳米层状钪密度泛函理论计算

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煤矿工程采矿新技术的应用研究分析

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当代化工研究 2022年第4期 90-92页

作者：李峰山西乡宁焦煤集团台头前湾煤业有限公司山西042100

为了全面提升煤矿工程采矿效率,要融合实际环境采取更加合理的采矿新技术,创设安全高效的开采环境,维持经济效益、环保效益的平衡,为煤矿产业的可持续发展奠定基础。本文分析了煤矿工程采矿新技术内容,并对优化采矿技术质量提出了几点... 详细信息

为了全面提升煤矿工程采矿效率,要融合实际环境采取更加合理的采矿新技术,创设安全高效的开采环境,维持经济效益、环保效益的平衡,为煤矿产业的可持续发展奠定基础。本文分析了煤矿工程采矿新技术内容,并对优化采矿技术质量提出了几点建议。

关键词：煤矿工程采矿新技术优化建议

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