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Boost VS_(2) electrochemical reactive kinetics by regulating crystallographic planes and coupling carbon matrix for high performance sodium-ion storage

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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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S波段高效GaN逆E类功率放大器

微波学报 2011年第4期27卷 49-52,56页

作者：曹韬刘友江曾荣吕立明中国工程物理研究院电子工程研究所绵阳621900 清华大学工程物理系北京100084

介绍一种高效逆E类功率放大器的设计方法,并选用GaN器件设计了工作于2.3GHz的逆E类功率放大器。当供电26V,输入功率26dBm时,放大器输出功率40.2dBm,工作效率76.1%,pAE为73.3%。提供了详尽的仿真与实测数据并对放大器性能进行分析。用数... 详细信息

介绍一种高效逆E类功率放大器的设计方法,并选用GaN器件设计了工作于2.3GHz的逆E类功率放大器。当供电26V,输入功率26dBm时,放大器输出功率40.2dBm,工作效率76.1%,pAE为73.3%。提供了详尽的仿真与实测数据并对放大器性能进行分析。用数字预失真技术对逆E类功率放大器进行线性化校正并取得了良好的效果。

关键词： E类功率放大器高效率 GaN 数字预失真

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面向对象的网络信息空间模型与信息传播

计算机科学 2003年第2期30卷 34-37页

作者：马卫东李幼平袁宏春中国工程物理研究院电子工程研究所绵阳621900 电子科技大学计算机学院成都610054

The Cyberspace is composed of a set including all electronic information elements and its information dissemination networks. In this paper,a kind of Cyberspace Model that four-dimensional entity described is submitted,and the classification and characteristic of the information element and information node are studied. The Object Oriented Model of Cyberspace that anthropomorphized is discussed and the mechanism of the information dissemination is analyzed. Finally we put forward to a personalizing Information Storage Model.

关键词：面向对象网络信息空间模型信息传播 Internet TCp/Ip协议局域网计算机网络

research about a new type of magneto-optical multi-layer films (MOMF) isolator

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Research about a new type of magneto-optical multi-layer fil...

Observation of spectral lines in the exceptional GrB 221009A

photonics Asia 2004;Optoelectronics,Microelectronics,and Nanotech

作者： Wen Xiao-Wen1) Li Guo-jun1) Qiu Gao-Xin1) Li Yong-ping1) Ding Lei2) Sui Zhan2) 1)(Department of physics, University of Science and Technology of china, Hefei 230026 china) 2)(The Eighth research institute, china academy of engineering physics, mianyang 621900 china)

One-dimensional magneto-optical (MO) photonic crystals display enhanced MO effect due to the localization of light, it can be used to fabricate small-size optical isolator with only tens of micros whi

关键词： optical isolator, magneto-optical effect, one-dimensional photonic crystals

来源： cnki会议评论

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Science china(physics,Mechanics & Astronomy) 2024年第8期67卷 187-206页

作者： Yan-Qiu Zhang Shao-Lin Xiong Ji-rong Mao Shuang-Nan Zhang wang-Chen Xue Chao Zheng Jia-Cong Liu Zhen Zhang Xi-Lu wang Ming-Yu Ge Shu-Xu Yi Li-Ming Song Zheng-Hua An Ce Cai Xin-Qiao Li Wen-Xi peng Wen-jun Tan Chen-Wei wang Xiang-Yang Wen Yue wang Shuo Xiao Fan Zhang peng Zhang Shi-Jie Zheng Key Laboratory of particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese academy of Sciences Beijing 100049China Yunnan Observatories Chinese Academy of SciencesKunming 650011China Center for Astronomical Mega-Science Chinese Academy of SciencesBeijing 100012China Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of SciencesKunming 650216China College of physics and Hebei Key Laboratory of photophysics research and Application Hebei Normal UniversityShijiazhuang 050024China Guizhou provincial Key Laboratory of radio Astronomy and Data processing Guizhou Normal UniversityGuiyang 550001China College of electronic and Information engineering Tongji UniversityShanghai 201804China

As the brightest gamma-ray burst ever observed,GrB 221009A provided a precious opportunity to explore spectral line *** this article,we performed a comprehensive spectroscopy analysis of GrB 221009A jointly with GECAM-C and Fermi/GBM data to search for emission and absorption *** the first time we investigated the line feature throughout this GrB including the most bright part where many instruments suffered problems,and identified prominent emission lines in multiple time *** central energy of the Gaussian emission line evolves from about 37 to 6 MeV,with a nearly constant ratio(about 10%)between the line width and central ***,we find that both the central energy and the energy flux of the emission line evolve with time as a power law decay with power law index of–1 and–2,*** suggest that the observed emission lines most likely origin from the blue-shifted electron positron pair annihilation 511 ke V *** find that a standard high latitude emission scenario cannot fully interpret the observation,thus we propose that the emission line comes from some dense clumps with electron positron pairs traveling together with the *** this scenario,we can use the emission line to directly,for the first time,measure the bulk Lorentz factor of the jet(Γ)and reveal its time evolution(i.e.,Γ~t^(-1))during the prompt ***,we find that the flux of the annihilation line in the co-moving frame keeps *** discoveries of the spectral line features shed new and important lights on the physics of GrB and relativistic jet.

关键词： GrB GrB 221009A emission line

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基于电子散斑干涉技术的压力容器无损检测

无损检测 2005年第1期27卷 2-5页

作者：黄鹏莫军符春渝李思忠中国工程物理研究院四川绵阳621900

针对含有内部狭长形缺陷的球形薄壁压力容器,采用电子散斑干涉技术测试了容器表面的位移场,分析了其应变和应力场。测试结果表明,内压0.65Mpa时离面位移等值线呈“花生”状,缺陷对应表面处变形产生局部凹陷,第一主应变和主应力场有明显... 详细信息

针对含有内部狭长形缺陷的球形薄壁压力容器,采用电子散斑干涉技术测试了容器表面的位移场,分析了其应变和应力场。测试结果表明,内压0.65Mpa时离面位移等值线呈“花生”状,缺陷对应表面处变形产生局部凹陷,第一主应变和主应力场有明显的狭长形低值带,该低值带能反映内部缺陷的位置和形状。给出了基于板壳理论的力学分析模型,分析表明,缺陷处壳体厚度改变产生的弯矩是导致应力和应变量在缺陷处迅速降低的主要原因。

关键词：无损检测压力容器电子散斑干涉技术缺陷应变场应力场

Application of different fiber structures and arrangements by electrospinning in triboelectric nanogenerators

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Chinese Journal of Chemical engineering 2024年第5期69卷 177-191页

作者： Hebin Li Zifei Meng Dehua wang Ye Lu Longlong Jiang Le Zhang Hanbin wang Xiaoxiong wang College of physics Qingdao UniversityQingdao 266071China School of physics and electronic engineering Jiangsu Normal UniversityXuzhouJiangsu 221000China Microsystem&Terahertz research Center China Academy of Engineering Physics(CAEP)Chengdu 610200China institute of electronic engineering China Academy of Engineering Physics(CAEP)Mianyang 621900China University-Industry Joint Center for Ocean Observation and Broadband Communication College of PhysicsQingdao UniversityQingdao 266071China Weihai Innovation research institute of Qingdao University Weihai 264200China Collaborative Innovation Center for Eco-Textiles of Shandong province and State Key Laboratory of Bio-Fibers and Eco-TextilesQingdao UniversityQingdao 266071China

In recent years,nanogenerators(NGs)have attracted wide attention in the energy field,among which triboelectric nanogenerators(TENGs)have shown superior *** reports of electrospinning(ES)-based TENGs have been reported,but there is a lack of deep analysis of the designing method from microstructure,limiting the creative of new ES-based *** TENGs use polymer materials to achieve corresponding design,which requires structural design of polymer *** existing polymer molding design methods include macroscopic molding methods,such as injection,compression,extrusion,calendering,etc.,combined with liquid-solid changes such as soluting and melting;it also includes micro-nano molding technology,such as melt-blown method,coagulation bath method,ES method,and nanoimprint *** fact,ES technology has good controllability of thickness dimension and rich means of nanoscale structure *** present,these characteristics have not been ***,in this paper,we combine recent reports with some microstructure regulation functions of ES to establish a more general TENGs design *** on the rich microstructure research results in the field of ES,much more new types of TENGs can be designed in the future.

关键词： Triboelectric nanogenerators Electrospinning Fiber microstructure regulation Nanomaterials Membranes Global optimization

Z-pinch一维时空分辨x射线辐射功率测量系统

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物理学报 2003年第5期52卷 1203-1206页

作者：徐荣昆李正宏郭存杨建伦李林波宋凤军宁佳敏夏广新许泽平中国工程物理研究院核物理与化学研究所绵阳621900

采用狭逢、红光闪烁体、光纤阵列、条纹相机、像增强器等元件组成x射线辐射功率时空分辨测量系统 ,该系统具有对x射线能量响应平坦 ,可有效屏蔽本底光干扰的优点 ,在喷气Z pinch实验中成功获得内爆等离子体x射线辐射的轴向分布图像 .文... 详细信息

采用狭逢、红光闪烁体、光纤阵列、条纹相机、像增强器等元件组成x射线辐射功率时空分辨测量系统 ,该系统具有对x射线能量响应平坦 ,可有效屏蔽本底光干扰的优点 ,在喷气Z pinch实验中成功获得内爆等离子体x射线辐射的轴向分布图像 .文中对系统结构、参数和使用情况进行了介绍。

关键词： Z-箍缩等离子体物理一维时空分辨X射线辐射功率测量系统内爆轴向分布图像

Direct observation of shock-induced phase transformation in polycrystalline iron via in situ x-ray diffraction

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Chinese physics B 2024年第10期33卷 337-342页

作者： Fan Zhang Jia-Qin Dong Zhi-Yong Xie Zhi-Yu He Hua Shu rui-rong wang jun Xiong Guo Jia Zhi-Heng Fang Wei wang Da-Wu Xiao An-Le Lei Jie Chen Xiu-Guang Huang Collaborative Innovation Center of IFSA(CICIFSA) School of Physics and AstronomyCenter for Ultrafast Science and TechnologyKey Laboratory for Laser Plasmas(Ministry of Education)Shanghai Jiao Tong UniversityShanghai 200240China Shanghai institute of Laser plasma China Academy of Engineering PhysicsShanghai 201800China institute of Materials China Academy of Engineering PhysicsMianyang 621700China

phase transition of polycrystalline iron compressed along the Hugoniot is studied by combining laser-driven shock with in situ x-ray diffraction *** is suggested that polycrystalline iron changes from an initial body-centered cubic structure to a hexagonal close-packed structure with increasing pressure(i.e.,a phase transition fromαtoε).The relationship between density and pressure for polycrystalline iron obtained from the present experiments is found to be in good agreement with the gas-gun Hugoniot *** results show that experiments with samples at lower temperatures under static loading,such as in a diamond anvil cell,lead to higher densities measured than those found under dynamic *** means that extrapolating results of static experiments may not predict the dynamic responses of materials *** addition,neither the face-centered cubic structure seen in previous molecular-dynamics simulations or twophase coexistence are found within our experimental pressure range.

关键词： in situ x-ray diffraction phase transition polycrystalline iron