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Rare Metals 2024年第1期43卷 98-112页

作者： Min Zeng Ming-Shan Wang Lin chen En-Zhi Li Zhen-Liang Yang Dan Zhou Hai-Jiao Xie Jun-chen chen Zhi-Yuan Ma Bing-Shu Guo Bo Yu Xing Li School of New Energy and Materials Southwest Petroleum UniversityChengdu 610500China Energy Storage Research institute Southwest Petroleum UniversityChengdu 610500China institute of Materials China Academy of Engineering PhysicsMianyang 621908China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and TechnologyBeijingBeijing 100083China Hangzhou Yanqu Information Technology Co. Ltd.Hangzhou 310003China

Vanadium disulfide(VS_(2)) as a typical two-dimensional transition metal chalcogenide has excellent competitiveness for sodium-ion storage due to its wide layer spacing(0.575 nm),high theoretical capacity of 932mAh·g^(-1) originating from multi-electron electrochemical ***,continuous sodiation process accompanied by crystal structural evolution and collapse cause rapid capacity ***,novel few-layer VS_(2)nanosheets with open(001) crystal planes are in-situ constructed on reduced graphene oxide to solve these issues mentioned *** indicates that few-layer VS_(2)provides more Na^(+) storage activity due to the low Na^(+)surface migration energy barrier on exposed crystal(001)*** flexible and high electronic conductivity of carbon matrix also effectively builds multi-level buffer structure and electron transport kinetics to boost the Na^(+)insertion/conversion reactive activity on VS_(2) as well as Na^(+) pseudocapacitance storage kinetics on edges and defects of nano *** coupling effects result in high rate capability and long cycling stability as a battery/capacitor *** delivers conspicuous high energy density of 81 and 40 Wh·kg^(-1) at power density of 118 and 10,286W·kg^(-1),as well as 80% energy retention rate after 5000cycles,confirming its great application potential in sodiumbased storage devices.

关键词： Vanadium disulfide Reduced graphene oxide Anode Sodium-ion battery Sodium-ion capacitor

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管式旋流气液分离器流场特性与分离性能研究

过程工程学报 2024年第7期24卷 772-782页

作者：张明孙欢王强强陈家庆尚超李想王春升孔令真中海油研究总院有限责任公司工程研究设计院北京100027 北京石油化工学院机械工程学院北京102617 深水油气管线关键技术与装备北京市重点实验室北京102617 西南石油大学石油与天然气工程学院四川成都610500

管式旋流气液分离器因具有分离效率高、结构紧凑等优点而受到广泛关注,但能否适应入口气含率大范围变化是制约其实用性的关键。本工作考察了能够适应气含率大范围变化的管式旋流气液分离器,采用计算流体力学(CFD),结合空气-水介质体系... 详细信息

管式旋流气液分离器因具有分离效率高、结构紧凑等优点而受到广泛关注,但能否适应入口气含率大范围变化是制约其实用性的关键。本工作考察了能够适应气含率大范围变化的管式旋流气液分离器,采用计算流体力学(CFD),结合空气-水介质体系下的实验测试,对其流场特性和分离性能进行研究。CFD数值模拟结果显示,入口气含率在10%~90%范围内变化时,气相分离效率均大于80%且变化幅值小于9.9%,液相分离效率均大于97%且变化幅值小于2.2%。实验测试结果显示,入口气含率在9.4%~89.2%范围内变化时,随入口气含率增加,气相出口的含液率逐渐减小而液相出口的气含率逐渐增加,气相出口的含液率均小于4%,除液体流量为12 m^(3)/h的工况外,其他工况下液相出口气含率始终小于10%。对比不同液体流量下的气相分离效率和液相分离效率,液体流量为8 m^(3)/h时分离性能最佳。CFD数值模拟结果与实验测试结果略有差异,但整体变化趋势一致,可作为结构放大设计的有效手段。研究结果表明,管式旋流气液分离器整体采用“强旋流+弱旋流+重力”的作用形式,具有较高的分离效率和良好的抗工况波动性能。

关键词：气液分离管式旋流数值模拟实验测试流场特性分离效率

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城市多车道隧道最不利火灾规模探讨

交通节能与环保 2024年第3期20卷 234-238页

作者：高恒潮陶家清陈训中国市政工程西南设计研究总院有限公司四川成都610081 西南交通大学交通隧道工程教育部重点实验室四川成都610031 西南交通大学土木工程学院四川成都610031

本文以四川省龙泉山一号隧道为依托,通过临界辐射热通量理论计算车辆横向引燃时间,基于文献中获得的早期试验结果建立隧道单车辆热释放率曲线,考虑火灾的横向发展,通过将隧道多车道火灾场景与单车辆热释放率曲线进行耦合的方法,对城市... 详细信息

本文以四川省龙泉山一号隧道为依托,通过临界辐射热通量理论计算车辆横向引燃时间,基于文献中获得的早期试验结果建立隧道单车辆热释放率曲线,考虑火灾的横向发展,通过将隧道多车道火灾场景与单车辆热释放率曲线进行耦合的方法,对城市多车道隧道内典型火灾场景下的最不利火灾规模进行研究。结果表明,隧道最不利火灾规模可以达到参与车辆最大火灾规模的总和,各场景下火灾发展变化规律一致,随着火灾横向蔓延程度的增加,隧道火灾保持最大规模燃烧时间不断减小,在进行隧道最不利火灾规模设计时,应该进行动态设计。

关键词：城市隧道火灾蔓延火灾规模

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Selection of Negative Charged Acidic Polar Additives to Regulate Electric Double Layer for Stable Zinc Ion Battery

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Nano-Micro Letters 2024年第12期16卷 342-356页

作者： Xing Fan Lina chen Yongjing Wang Xieyu Xu Xingxing Jiao Peng Zhou Yangyang Liu Zhongxiao Song Jiang Zhou State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China School of Materials Science and Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055People’s Republic of China Research institute of Frontier Science Southwest Jiaotong UniversityChengdu 610031People’s Republic of China Hunan Provincial Key Defense Laboratory of High Temperature Wear-Resisting Materials and Preparation Technology Hunan University of Science and TechnologyXiangtan 411201People’s Republic of China School of Instrument Science and Technology Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China School of Materials Science and Engineering Hunan Provincial Key Laboratory of Electronic Packaging and Advanced Functional MaterialsCentral South UniversityChangsha 410083People’s Republic of China

Zinc-ion batteries are promising for large-scale electrochemical energy storage systems,which still suffer from interfacial issues,e.g.,hydrogen evolution side reaction(HER),self-corrosion,and uncontrollable dendritic Zn *** the regulation of electric double layer(EDL)has been verified for interfacial issues,the principle to select the additive as the regulator is still ***,several typical amino acids with different characteristics were examined to reveal the interfacial behaviors in regulated EDL on the Zn *** charged acidic polarity(NCAP)has been unveiled as the guideline for selecting additive to reconstruct EDL with an inner zincophilic H_(2)O-poor layer and to replace H_(2)O molecules of hydrated Zn^(2+)with NCAP *** the synergistic effects of EDL regulation,the uncontrollable interface is significantly stabilized from the suppressed HER and anti-self-corrosion with uniform ***,by adding NCAP glutamate,a high average Coulombic efficiency of 99.83%of Zn metal is achieved in Zn|Cu asymmetrical cell for over 2000 cycles,and NH4V4O10|Zn full cell exhibits a high-capacity retention of 82.1%after 3000 cycles at 2 A g^(-1).Recapitulating,the NCAP principle posted here can quicken the design of trailblazing electrolyte additives for aqueous Zn-based electrochemical energy storage systems.

关键词： Aqueous Zn-ion batteries Zn metal anode Negative charged acidic polar additives Electric double-layer regulation

Nano-Ni-Induced electronic Modulation of MoS_(2) Nanosheets Enables Energy-Saving H_(2) Production and Sulfide Degradation

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Energy & Environmental Materials 2024年第3期7卷 228-235页

作者： Fan Liu Xinghong Cai Yang Tang Wenqian Liu Qianwei chen Peixin Dong Maowen Xu Yangyang Tan Shujuan Bao institute for Clean Energy&Advanced Materials School of Materials and EnergySouthwest UniversityChongqing 400715China

Electrocatalytic hydrogen evolution and sulfion(S^(2-))recycling are promising strategies for boosting H_(2)production and removing environmental ***,a nano-Ni-functionalized molybdenum disulfide(MoS_(2))nanosheet was assembled on steel mesh(Ni-MoS_(2)/SM)for use in sulfide oxidation reaction-assisted,energy-saving H_(2)*** and theoretical calculation results revealed that anchoring nano-Ni on high-surface-area slack MoS_(2)nanosheets not only optimized catalyst adsorption of polysulfides but also played an important role in promoting hydrogen evolution reaction kinetics by absorbing OH_(ad),thereby greatly enhancing the catalytic performance toward sulfide oxidation reaction and hydrogen evolution ***,the Ni/MoS^(2-)based hydrogen evolution reaction+sulfide oxidation reaction system achieved nearly 100%hydrogen production efficiency and only consumed 61%less power per kWh than the oxygen evolution reaction+hydrogen evolution reaction system,which suggested our proposed Ni-MoS_(2)and novel hydrogen production system are promising for sustainable energy production.

关键词： hydrogen evolution reaction low energy consumption molybdenum disulfide sulfide oxidation reaction

Pressure effects on the electrical transport and anharmonic lattice dynamics of r-GeTe:A first-principles study

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Journal of Materiomics 2021年第6期7卷 1190-1197页

作者： Juan Cui Shasha Li chengliang Xia Yue chen jiaqing He Shenzhen Key Laboratory of Thermoelectric Materials Department of PhysicsSouthern University of Science and TechnologyShenzhen518055China Department of Mechanical Engineering The University of Hong KongPokfulam RoadSARHong KongChina School of Science Nanjing University of Posts and TelecommunicationsNanjing210023China HKU Zhejiang institute of Research and Innovation 1623 Dayuan RoadLin A311305China Guangdong Provincial Key Laboratory of Energy Materials for Electric Power Southern University of Science and TechnologyShenzhen518055China

Various strategies for thermoelectric material optimization have been widely studied and used for promoting electrical transport and suppressing thermal *** a nontraditional method,pressure has shown great potential,as it has been applied to obtain a high thermoelectric figure of merit,but the microscopic mechanisms involved have yet to be fully *** this study,we focus on r-GeTe,a lowtemperature phase of GeTe,and investigate the pressure effects on the electronic structure,electrical transport properties and anharmonic lattice dynamics based on density functional theory(DFT),the Boltzmann transport equations(BTEs)and perturbation *** relaxation times are obtained based on the electron-phonon interaction and the constant relaxation time *** corresponding electrical transport properties are compared with those obtained from previous *** pressure is shown to increase valley degeneracy,decrease the band effective mass and enhance the electrical transport *** the same time,the increase in the low-frequency phonon lifetime and phonon group velocity leads to an increase in lattice thermal conductivity under *** study provides insight into r-GeTe under hydrostatic pressure and paves the way for a high-pressure strategy to optimize transport properties.

关键词： GeTe Pressure effect electronic structure Transport properties

Hybridized triboelectric-electromagnetic nanogenerators and solar cell for energy harvesting and wireless power transmission

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Nano Research 2022年第3期15卷 2069-2076页

作者： Yandong chen Yang Jie jiaqing Zhu Qixin Lu Yu cheng Xia Cao Zhong Lin Wang Beijing institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China Research Center for Bioengineering and Sensing Technology Beijing Key Laboratory for Bioengineering and Sensing TechnologySchool of Chemistry and Biological EngineeringBeijing Municipal Key Laboratory of New Energy Materials and Technologiesand Center for Green InnovationSchool of Mathematics and PhysicsUniversity of Science and Technology BeijingBeijing 100083China Center on Nanoenergy Research School of Physical Science and Technology Guangxi UniversityNanning 530004China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA30332-0245USA

Energy harvesting and power transmission is a signiﬁcant challenge for the self-powered technologies towards mobile electronic ***,we propose a hybridized energy harvester to complement each other's strengths for simultaneously scavenging multiple types of energy and then wirelessly transmit the *** harvester consists of electromagnetic-triboelectric nanogenerator units for collecting rotational energy and a commercial water-proof flexible solar *** a rotation rate of 500 rpm,the output current of electromagnetic-triboelectric nanogenerator units can reach about 630 mA through energy ***,the power harvested by hybridized energy harvester can be wirelessly transmitted up to a distance of about 100 cm in real time to charge mobile phone,anemometer,and hygrometer based on self-resonant *** hybridized energy harvester with wireless power transmission has potential applications in large-scale energy collection,long-distance wireless power transmission and sustainably driving mobile electronic devices.

关键词： triboelectric nanogenerator electromagnetic generator solar cell hybridized energy harvester

Effect of Ti Particles on the Microstructure and Mechanical Properties of AZ91 Magnesium Matrix Composites

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Acta Metallurgica Sinica(English Letters) 2024年第3期37卷 513-524页

作者： Lu Xiao Ting-Ting Liu Yue Chu Bo Song Jie Zhao Xian-Hua chen Kai-Hong Zheng Fu-Sheng Pan College of Materials Science and Engineering Chongqing UniversityChongqing 400044China lntelligent Manufacturing and Automobile School Chongqing College of Electronic EngineeringChongqing 401331China School of Materials and Energy Southwest UniversityChongqing 400715China Science and Technology Research institute of CNNC 404 Co.LTD Gansu 735100China institute of New Materials Guangdong Academy of SciencesGuangzhou 510650China

Spherical micro-Ti particle(TiP)-reinforced AZ91 magnesium alloy composites were fabricated by semi-solid stirring assisted ultrasonic vibration,which were then subjected to hot *** microstructure results showed that the addition of Ti particles refined the grain size and decreased the texture intensity of the as-extruded AZ91 *** Al3Ti phase with a thickness of 100 nm formed at the Ti/Mg interface,which had a non-coherent relationship with the magnesium *** as-extruded 1 vol.%TiP/AZ91 composite exhibited the best comprehensive mechanical properties,with yield strength,ultimate tensile strength,and elongation at break of 366 MPa,456 MPa,and 14.6%,respectively,which were significantly higher than those of the AZ91 ***,the addition of Ti particles can improve the strength and ductility of the AZ91 alloy,demonstrating the value of magnesium matrix composites for commercial applications.

关键词： Magnesium matrix composites Ti particles Interface Mechanical properties

Design of fast-scanning millimeter-wave monopulse antenna

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Design of fast-scanning millimeter-wave monopulse antenna