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Boron-doped high-entropy oxide toward high-rate and long-cycle layered cathodes for wide-temperature sodium-ion batteries

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Journal of Energy Chemistry 2024年第8期95卷 577-587,I0012页

作者： Yuzhen Dang Zhe Xu Yurong Wu runguo zheng Zhiyuan Wang Xiaopin Lin Yanguo Liu zheng-Yao Li Kai Sun Dongfeng Chen Dan Wang School of Materials Science and Engineering Northeastern UniversityShenyang 110819LiaoningChina School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004HebeiChina Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Qinhuangdao 066004HebeiChina Neutron Scattering Laboratory Department of Nuclear PhysicsChina Institute of Atomic EnergyBeijing 102413China

03-type layered metal oxides hold great promise for sodium-ion batteries cathodes owing to their energy density ***,the severe irreversible phase transition and sluggish Na^(+)diffusion kinetics pose significant challenges to achieve high-performance layered ***,a boron-doped03-type high entropy oxide Na(Fe_(0.2)Co_(0.15)Cu_(0.05)Ni_(0.2)Mn_(0.2)Ti_(0.2))B_(0.02)O_(2)(NFCCNMT-B_(0.02))is designed and the covalent B-O bonds with high entropy configuration ensure a robust layered *** obtained cathode NFCCNMT-B_(0.02)exhibits impressive cycling performance(capacity retention of 95%and 82%after100 cycles and 300 cycles at 1 and 10 C,respectively)and outstanding rate capability(capacity of 83 mAh g^(-1)at 10 C).Furthermore,the NFCCNMT-B_(0.02)demonstrates a superior wide-temperature performance,maintaining the same capacity level(113,4 mAh g^(-1)@-20℃,121 mAh g^(-1)@25℃,and 119 mAh g^(-1)@60℃)and superior cycle stability(90%capacity retention after 100 cycles at 1 C at-20℃).The high-entropy configuration design with boron doping strategy contributes to the excellent sodium-ion storage *** high-entropy configuration design effectively suppresses irreversible phase transitions accompanied by small volume changes(ΔV=0.65 A3).B ions doping expands the Na layer distance and enlarges the P3 phase region,thereby enhancing Na^(+)diffusion *** work offers valuable insights into design of high-performance layered cathodes for sodium-ion batteries operating across a wide temperature.

关键词： High entropy oxide Born substitution Phase transition Na~+diffusion kinetics Sodium-ion batteries

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Modification, application and expansion of electrode materials based on cobalt telluride

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Journal of Energy Chemistry 2024年第10期97卷 710-737页

作者： Huilin Fan Yao Dai Xiaoyun Xue runguo zheng Yuan Wang Hamidreza Arandiyan Zhiyuan Wang Zongping Shao Hongyu Sun Yanguo Liu School of Materials Science and Engineering Northeastern University School of Resources and Materials Northeastern University at Qinhuangdao Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Northeastern University at Qinhuangdao Department of Chemical Engineering The University of Melbourne Centre for Advanced Materials and Industrial Chemistry (CAMIC) School of Science RMIT University Laboratory of Advanced Catalysis for Sustainability School of Chemistry University of Sydney WA School of Mines: Minerals Energy and Chemical Engineering Curtin University

Metal(Li,Na,K,Al)-ion batteries and lithium-sulfur and lithium-tellurium batteries are gaining recognition for their eco-friendly characteristics,substantial energy density,and sustainable ***,the overall performance of rechargeable batteries heavily depends on their electrode *** metal tellurides have recently gained significant attention due to their high electrical conductivity and *** telluride has received the most extensive research due to its catalytic activity,unique magnetic properties,and diverse composition and crystal ***,its limited conductivity and significant volume variation contribute to electrode structural deterioration and rapid capacity *** review comprehensively summarizes recent advances in rational design and synthesis of modified cobalt telluride-based electrodes,encompassing defect engineering(Te vacancies,cation vacancies,heterointerfaces,and homogeneous interfaces) and composite engineering(derived carbon from precursors,carbon fibers,Mxene,graphene nanosheets,etc.).Particularly,the intricate evolution mechanisms of the conversion reaction process during cycling are ***,these modified strategies applied to other transitional metal tellurides,such as iron telluride,nickel telluride,zinc telluride,copper telluride,molybdenum telluride,etc.,are also thoroughly ***,their application extends to emerging aqueous zinc-ion ***,potential challenges and prospects are discussed to further propel the development of transition metal tellurides electrode materials for next-generation rechargeable batteries.

关键词： Rechargeable batteries Transition metal tellurides Cobalt telluride Defect engineering Composite engineering

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Filtration performance and modeling of granular bed for dust removal from coal pyrolytic vapors

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Chinese Journal of Chemical Engineering 2024年第1期65卷 35-42页

作者： Shuaiqiang Yang Lin Du Guangchao Ding runguo Liu Wenli Song Songgeng Li State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Petrochemical Engineering Yan’an Vocational and Technical CollegeYan’an 716000China Sino-Danish College University of Chinese Academy of SciencesBeijing 100049China

Dust removal from pyrolytic vapors at high temperatures is an obstacle to the industrialization of the coal pyrolysis *** this work,a granular bed with expanded perlites as filtration media was designed and integrated into a 10 t·d^(–1)coal pyrolysis *** testing results showed that around 97.56%dust collection efficiency was *** a result,dust content in tar was significantly *** pressure drop of the granular bed maintained in the range of 356 Pa to 489 *** dust size in the effluent after filtration exhibited a bimodal distribution,which was attributed to the heterogeneity of the dust *** effects of filtration bed on pyrolytic product yields were also discussed.A modified filtration model based on the macroscopic phenomenological theory was proposed to describe the performance of the granular *** computation results were well agreed with the experimental data.

关键词： Granular bed filtration Dust removal Pyrolysis Filtration Fixed-bed

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Microstructure and compression deformation behavior in the quasicrystalreinforced Mg-8Zn-1Y alloy solidified under super-high pressure

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Journal of Rare Earths 2014年第11期32卷 1048-1055页

作者：董允林小娉徐瑞郑润国樊志斌刘士俊王哲 School of Materials and Metallurgy Northeast University State Key Laboratory of Metastable Materials Science & Technology Yanshan University

The microstructure of Mg-8Zn-1Y alloy solidified under super-high pressure was analyzed through X-ray diffraction（XRD）, scanning electron microscopy（SEM） and energy dispersive spectroscopy（EDS）. And, compression deformation behavior at room-temperature was studied. The results showed that the microstructure of Mg-8Zn-1Y alloy solidified under ambient pressure and super-high pressure was both mainly composed of ■-Mg and quasicrystal I-Mg3Zn6 Y. Solidification under super-high pressure contributed to refining solidified microstructure and changing morphology of the intergranular second phase. The morphology of intergranular second phase（quasicrystal I-Mg3Zn6Y） was transformed from continuous network（ambient pressure） to long island（high pressure） and finally to granular（super-high pressure） with the increase in pressure. The compressive strength, yield strength and rupture strain of the samples solidified under ambient pressure were significantly improved from 262.6 MPa, 244.4 MPa and 13.3% to 437.3 MPa, 368.9 MPa and 24.7% under the pressure of 6 GPa, respectively. Under ambient pressure, cleavage plane on compressive fracture was large and smooth. When it was solidified under the pressure ranging from 4 to 6 GPa, cleavage plane on compressive fracture was small and coarse. In addition, dimple, tear ridge and lobate patterns existed.

关键词： Mg-8Zn-1Y alloy super-high solidification solidified microstructure room-temperature compression deformation compressive property rare earths

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GPa级超高压下Mg-6Zn-1Y合金晶体形态及凝固组织分析

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稀有金属材料与工程 2013年第11期42卷 2309-2314页

作者：林小娉董允徐瑞郑润国焦世辉东北大学辽宁沈阳110819 燕山大学河北秦皇岛066004

利用扫描电镜（SEM）并配合能谱（EDS）、XRD研究了超高压凝固下Mg-6Zn-1Y合金晶体形貌和凝固组织.结果表明：GPa超高压下凝固,随着凝固压力的增大,α-Mg晶体形态由1.03×0-9 GPa（常压）下的树枝晶→细树枝晶→柱状树枝晶→粒状“胞晶... 详细信息

利用扫描电镜（SEM）并配合能谱（EDS）、XRD研究了超高压凝固下Mg-6Zn-1Y合金晶体形貌和凝固组织.结果表明：GPa超高压下凝固,随着凝固压力的增大,α-Mg晶体形态由1.03×0-9 GPa（常压）下的树枝晶→细树枝晶→柱状树枝晶→粒状“胞晶”的转变,固/液界面趋于稳定.1.03×10-9 GPa下实验合金的凝固组织由α-Mg相、I-Mg3Zn6Y和S-Mg43Zn4Y3相3相组成,2～6 GPa下实验合金的凝固组织由α-Mg、I-Mg3Zn6Y和S-Mg43Zn4Y3相和高Y含量的Mg-Zn-Y三元相4相组成.

关键词： GPa级超高压 Mg-6Zn-1Y合金晶体形态凝固组织

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Cu-La_2O_3复合材料的摩擦磨损特性

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稀有金属材料与工程 2010年第A1期39卷 293-295页

作者：郑润国战再吉王文魁燕山大学河北秦皇岛066004

采用内氧化法制备Cu-La2O3复合材料。以该复合材料为销试样,轴承钢为盘试样,进行载流条件下的高速摩擦磨损试验,并对销试样摩擦表面进行微观形貌分析。结果表明:在试验条件下,Cu-La2O3复合材料的磨损率随电流的增加而增大,随载荷增加先... 详细信息

采用内氧化法制备Cu-La2O3复合材料。以该复合材料为销试样,轴承钢为盘试样,进行载流条件下的高速摩擦磨损试验,并对销试样摩擦表面进行微观形貌分析。结果表明:在试验条件下,Cu-La2O3复合材料的磨损率随电流的增加而增大,随载荷增加先降低后增加。复合材料的干滑动摩擦磨损机制主要是磨粒磨损、粘着磨损及电弧侵蚀磨损。

关键词： Cu-La2O3复合材料电流磨损率磨损机制

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Design and preparation of a crosslinkable,oil-resistant,and bio-based elastomer from fumarate

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Science China Chemistry 2024年第2期67卷 622-631页

作者： Hui Yang Haijun Ji Xinxin Zhou Shihan Yang Liwei Li Chaoying Sun Weiwei Lei runguo Wang Liqun Zhang Beijing State Key Laboratory of Organic-Inorganic Composites&Beijing Laboratory of Biomedical Materials Beijing University of Chemical TechnologyBeijing100029China Hubei Key Laboratory of Polymer Materials Faculty of Materials Science and EngineeringHubei UniversityWuhan430062China

Poly(diethyl fumarate-co-methoxyethyl acrylate-co-vinyl chloroacetate)(PDEFMV),a novel bio-based elastomer with a saturated structure,was synthesized via redox emulsion *** glass-transition temperatures of PDEFMV,adjusted through the variation of the diethyl fumarate-to-methoxyethyl acrylate feeding ratio,ranged from-36.1 to-14.8 ℃.The number-average molecular weights of PDEFMV ranged from 384,000 to 46,000 g/*** designing the molecular structure,vinyl chloroacetate was used to provide active sites for subsequent vulcanization and *** active chlorine groups within the PDEFMV chain reacted with the crosslinking agent trithiocyanuric acid under high temperature and pressure to form a nonsulfur crosslinked three-dimensional network *** achieve the desired properties,carbon black(CB,N330) was incorporated to reinforce PDEFMV,leading to the formation of PDEFMV/CB composites.A comprehensive study was conducted on the high-temperature oil resistance of PDEFMV/CB *** immersion in IRM903 oil at temperatures of 150 and 200 ℃ for 72 h,the mass and volume changes in PDEFMV/CB were lower than those observed in commercially available acrylate rubber(AR)/CB,indicating that PDEFMV exhibited superior oil ***,the aging characteristics and mechanisms of oil resistance in the PDEFMV/CB and AR/CB composites were investigated at different temperatures(150,200,and 250 ℃).The results provide insights into the operational temperature ranges suitable for PDEFMV/CB and offer valuable guidance for potential industrial applications.

关键词： diethyl fumarate molecular design bio-based elastomer solvent-free synthetic route high-temperature oil resistance

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时效Mg-8.14Zn-1.44Y-0.5Zr合金高温摩擦磨损性能研究

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材料科学与工艺 2019年第5期27卷 34-38页

作者：郑润国黄婷武凯琦林小娉东北大学材料科学与工程学院沈阳110819 东北大学秦皇岛分校资源与材料学院河北秦皇岛066004

镁合金在航空航天、汽车及通讯领域有着广泛的应用,为进一步改善镁合金的耐磨性,在不同温度下对Mg-8.14Zn-1.44Y-0.5Zr合金进行了时效处理,并测试了铸态和时效态合金的硬度及高温条件下摩擦磨损行为.采用扫描电子显微镜对不同载荷及环... 详细信息

镁合金在航空航天、汽车及通讯领域有着广泛的应用,为进一步改善镁合金的耐磨性,在不同温度下对Mg-8.14Zn-1.44Y-0.5Zr合金进行了时效处理,并测试了铸态和时效态合金的硬度及高温条件下摩擦磨损行为.采用扫描电子显微镜对不同载荷及环境温度条件下合金的摩擦磨损表面进行观察,并分析了其磨损机制.结果表明:在240℃时,随着时效时间的增加,合金的硬度值呈现先增加而后降低的趋势,当时效温度为240℃,时间为12 h时,Mg-8.14Zn-1.44Y-0.5Zr合金具有最高的硬度值;铸态合金的磨损体积损失明显高于时效态合金,两种合金的磨损体积损失均随载荷和环境温度增加而增大,且时效态合金发生严重磨损时对应的转变温度滞后于铸态合金;环境温度低于250℃时,合金的磨损机制主要为磨粒磨损和氧化磨损,环境温度为300℃时,磨损机制变为剥层磨损和黏着磨损.时效处理可显著提高Mg-8.14Zn-1.44Y-0.5Zr合金的硬度及耐磨性.

关键词：镁合金滑动摩擦磨损体积损失高温磨损磨损机制

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基于FSEC动力电池箱的强度分析

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汽车实用技术 2024年第3期49卷 48-51页

作者：任润国尉庆国山西新能源汽车工业有限公司山西晋中030600 中北大学能源动力工程学院山西太原030051

以中国大学生电动方程式大赛(FSEC)为平台,根据大赛提出的规则要求以及设计指导方针,对电池箱进行强度校核,在满足大赛规则的情况下,设计出一款高强度、高安全性、高轻量化的电池箱。文章通过数学模型转化,应用CATIA软件对样车电池箱以... 详细信息

以中国大学生电动方程式大赛(FSEC)为平台,根据大赛提出的规则要求以及设计指导方针,对电池箱进行强度校核,在满足大赛规则的情况下,设计出一款高强度、高安全性、高轻量化的电池箱。文章通过数学模型转化,应用CATIA软件对样车电池箱以及包括电池在内的各个元器件进行建模、装配,再通过AnsysWorkbench软件对电池箱体进行静态结构分析,获得仿真数据,设计出满足大赛安全性要求的电池箱。

关键词：动力电池箱 FSEC 静态结构分析

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Regional Economic Development Trend Prediction Method Based on Digital Twins and Time Series Network

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Computers, Materials & Continua 2023年第8期76卷 1781-1796页

作者： runguo Xu Xuehan Yu Xiaoxue Zhao School of International Relations Yonsei UniversitySeoul03722Korea

At present,the interpretation of regional economic development(RED)has changed from a simple evaluation of economic growth to a focus on economic growth and the optimization of economic structure,the improvement of economic relations,and the change of institutional *** article uses the RED trend as the research object and constructs the RED index to conduct the theoretical *** this paper uses the attention mechanism based on digital twins and the time series network model to verify the actual ***,the regional economy is predicted according to the theoretical *** specific research work mainly includes the following aspects:1)This paper introduced the development status of research on time series networks and economic forecasting at home and abroad.2)This paper introduces the basic principles and structures of long and short-term memory(LSTM)and convolutional neural network(CNN),constructs an improved CNN-LSTM model combined with the attention mechanism,and then constructs a regional economic prediction index system.3)The best parameters of the model are selected through experiments,and the trained model is used for simulation experiment *** results show that the CNN-LSTM model based on the attentionmechanism proposed in this paper has high accuracy in predicting regional economies.

关键词： Regional economic development attention mechanism digital twins time series network

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