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砂土地基海上风电大直径单桩基础的p-y曲线研究

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太阳能学报 2024年第7期45卷 704-711页

作者：刘畅博胡中波李阔刘欣怡田德帅史楠中国电建集团成都勘测设计研究院有限公司成都610072

依托福建某海上风电项目现场试验,对大直径单桩有限元模型的有效性进行验证,进一步研究砂土地基中不同桩径大直径单桩的破坏模式、初始刚度、极限抗力随桩径与深度的变化规律,并分别考虑桩径的尺寸效应与埋深对双曲线模型进行修正。结... 详细信息

依托福建某海上风电项目现场试验,对大直径单桩有限元模型的有效性进行验证,进一步研究砂土地基中不同桩径大直径单桩的破坏模式、初始刚度、极限抗力随桩径与深度的变化规律,并分别考虑桩径的尺寸效应与埋深对双曲线模型进行修正。结果表明:不同桩径下大直径单桩的破坏模式主要为浅层土体的楔形破坏;API规范、双曲线模型计算得到的p-y(地基土水平抗力-桩水平位移)曲线与数模得到的p-y曲线误差较大,而修正双曲线模型与数模结果吻合较好,优于其他模型的计算结果。

关键词：海上风电桩基承载能力 p-y曲线砂土

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压缩空气储能系统地下人工硐室技术及其评价技术研究

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热力发电 2024年第10期53卷 1-10页

作者：杜冬梅段树洋蒋志容胡中波何青华北电力大学能源动力与机械工程学院北京102206 中国电建集团成都勘测设计研究院有限公司四川成都611100

压缩空气储能是大规模长时间的新型物理储能形式。储气库是压缩空气储能系统中至关重要的组成部分。对常用储气装置特点进行分析与总结,针对地下人工硐室进行比较详细的讨论;对压缩空气储能系统地下人工硐室相对于其他类型储气库的优势... 详细信息

压缩空气储能是大规模长时间的新型物理储能形式。储气库是压缩空气储能系统中至关重要的组成部分。对常用储气装置特点进行分析与总结,针对地下人工硐室进行比较详细的讨论;对压缩空气储能系统地下人工硐室相对于其他类型储气库的优势进行了归纳;对地下人工硐室承载结构、密封系统、传热管理系统等自身设计因素进行了分析;分析讨论了影响地下人工硐室运行过程中的选址、埋深以及压力设计准则等关键技术;对影响人工硐室稳定运行的相关因素提出了评价方法以及评价指标。在此基础上,对压缩空气储能地下人工硐室未来发展方向进行了展望,为地下人工硐室的结构合理性设计与稳定性运行提供参考。

关键词：储能压缩空气储气库人工硐室评价技术

Understanding the roles of Ti on the structure and electrochemical performances of Li2Ru1-xTixO3 cathode materials for Li-ion batteries

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Journal of Energy Chemistry 2019年第6期28卷 9-16页

作者： hu Zhao Yanchao Shi Li Xue Yingzhi Cheng zhongbo hu Xiangfeng Liu College of Materials Science and Optoelectronic Technology University of Chinese Academy of SciencesBeijing 100049China Inner Mongolia Synthetic Chemical Institute Hohhot 010072Inner MongoliaChina School of Chemical Engineering Shandong University of TechnologyZibo 255049ShandongChina

The lattice doping has been widely used to improve the electrochemical performances of Li-rich cathode materials but the roles of the introduced foreign atoms are still not very ***,a series of Li2Ru1-xTixO3 solid solutions have been synthesized and the roles of Ti doping on the structural and electrochemical properties of Li2RuO3 have been comprehensively *** Rietveld refinement exhibits that the interlayer spacing gradually shortens with increasing Ti *** shrinkage is favorable to the layered structure stability but increases the lithium diffusion *** measurements show that Li2Ru0.8Ti0.2O3 possesses the best cyclability with 196.9 and 196.1 m Ah g-1for charge and discharge capacity retaining after 90 cycles,*** voltammetry scanning indicates that Ti dopant promotes the formation of more peroxo-or superoxo-like species but reduces the initial coulumbic *** of electrochemical impedance spectroscopy display that Ti doping reduces the charge transfer impedance,which facilitates the lithium-ion diffusion across the electrolyteelectrode interface and improves the electronic ***2Ru0.8Ti0.2O3exhibits the best electrochemical performance owing to the balance among all the factors discussed *** study also offers some new insights into optimizing the electrochemical performances of Li-rich cathode materials through the lattice doping.

关键词： Lithium-ion battery Li-rich cathode Ti doping Rietveld refinement

风力机直接耦合压缩空气储能系统及其建模分析

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热力发电 2024年第9期53卷 60-68页

作者：蒋志容胡中波尉倥李育斌刘超李红何青中国电建集团成都勘测设计研究院有限公司成都611100 华北电力大学能源动力与机械工程学院北京102206

提出了风力机直接耦合压缩空气储能系统(wind drove compressed air energy storage,W-CAES),其优点是可以减少因风能的波动性和随机性而造成的风能浪费,采用风力机直驱压缩机的工作方式摆脱了压缩机对输入电能的依赖,更适应离网发电系... 详细信息

提出了风力机直接耦合压缩空气储能系统(wind drove compressed air energy storage,W-CAES),其优点是可以减少因风能的波动性和随机性而造成的风能浪费,采用风力机直驱压缩机的工作方式摆脱了压缩机对输入电能的依赖,更适应离网发电系统。建立了W-CAES系统模型,设计了风力机直驱的压缩空气储能系统参数,分析了风速、环境温度以及空气湿度对系统效率的影响。结果表明:在储气体积相同情况下,充气时间随风速的降低而增加,当风速为14、6 m/s时,充气时间分别为0.71、1.64 h;系统效率随环境温度和空气湿度的升高而略有降低;当环境温度分别为-30、40℃时,对应的系统效率分别为52.97%和52.08%;当空气的相对湿度分别为0和1时,对应的系统效率分别为52.27%和52.14%。

关键词：压缩空气储能风力机建模压缩机风速

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Crystal structures and thermal expansion properties of Y_(2-x)Er_xMo_4O_(15) (x=0.0-2.0) solid solutions

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Rare Metals 2007年第5期26卷 426-434页

作者： YU Zhouxiang CHEN Dongfeng WANG hui PENG Jie CHENG Yingzhi WU Meimei hu zhongbo China Institute of Atomic Energy Beijing 102413 China College of Chemistly and Chemical Engineering Graduate University of Chinese Academy of Sciences Beijing 100049 China

A new series of rare earth compounds,Y2-xErxMo4O15 （x=0.0-2.0）,were synthesized and their structures were determined by powder X-ray diffraction （XRD）. Rietveld analysis of XRD patterns reveals that the compounds of this series crystallize in monoclinic system with space group P21/c. The lattice parameters a,b,c,β and the unit cell volume V de-crease linearly with increasing Er content. The thermal expansion properties of these compounds were studied under high-temperature XRD. Positive thermal expansions of compounds Y2-xErxMo4O15 are found to be anisotropic along the three crystallographic directions where a and c axes expand while b axis contracts in the whole temperature range. By analysis of data,the expansion of weak band Mo2-O14 with rising temperature should be responsible for positive thermal expansion.

关键词： thermal expansion crystal structure molybdate XRD

Nanotechnology-based strategies for treatment of ocular disease

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Acta Pharmaceutica Sinica B 2017年第3期7卷 281-291页

作者： Yuhua Weng Juan Liu Shubin Jin Weisheng Guo Xingjie Liang zhongbo hu College of Materials Science and Opto-Electronic Technology University of Chinese Academy of Sciences Laboratory of Controllable Nanopharmaceuticals Chinese Academy of Sciences(CAS)Center for Excellence in Nanoscience CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety National Center for Nanoscience and Technology of China University of Chinese Academy of Sciences

Ocular diseases include various anterior and posterior segment diseases. Due to the unique anatomy and physiology of the eye, efficient ocular drug delivery is a great challenge to researchers and pharmacologists. Although there are conventional noninvasive and invasive treatments, such as eye drops,injections and implants, the current treatments either suffer from low bioavailability or severe adverse ocular effects. Alternatively, the emerging nanoscience and nanotechnology are playing an important role in the development of novel strategies for ocular disease therapy. Various active molecules have been designed to associate with nanocarriers to overcome ocular barriers and intimately interact with specific ocular tissues. In this review, we highlight the recent attempts of nanotechnology-based systems for imaging and treating ocular diseases, such as corneal d iseases, glaucoma, retina diseases, and choroid diseases. Although additional work remains, the progress described herein may pave the way to new,highly effective and important ocular nanomedicines.

关键词： Nanosystems Nanocarrier Eye Ocular disease Ocular drug delivery Therapy Diagnosis

Tuning anionic redox activity to boost high-performance sodium-storage in low-cost Na_(0.67)Fe_(0.5)Mn_(0.5)O_(2) cathode

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Journal of Energy Chemistry 2022年第10期31卷 214-222,I0005页

作者： Jianyue Jiao Kang Wu Na Li Enyue Zhao Wen Yin zhongbo hu Fangwei Wang Jinkui Zhao Xiaoling Xiao College of Materials Science and Opto-electronic Technology Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808GuangdongChina Spallation Neutron Source Science Center Dongguan 523803GuangdongChina Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

Na-based layered iron-manganese oxide Na_(0.67)Fe_(0.5)Mn_(0.5)O_(2) containing only low-cost elements is a promising cathode for Na-ion batteries used in large-scale energy storage ***,the poor cycle stability restricts its practical *** capacity decay of Na_(0.67)Fe_(0.6)Mn_(0.5)O_(2) mainly originates from the irreversible anionic redox reaction charge compensation due to the high-level hybridization between oxygen and ***,we rationally design a surface Ti doping strategy to tune the anionic redox reaction activity of Na_(0.67)Fe_(0.5)Mn_(0.5)O_(2) and improve its Na-storage *** doped Ti ions not only enlarge the Na migration spacing layer but also improve the structure stability thanks to the strong Ti-O *** importantly,the d0-shell electronic structure of Ti^(4+) can suppress the charge transfer from the oxidized anions to cations,thus reducing the anionic redox reaction activity and enhancing the reversibility of charge *** modified Na_(0.67)Fe_(0.5)Mn_(0.5)O_(2) cathode shows a reversible capacity of 198 mA h g^(-1) and an increased capacity retention from 15% to 73% after about1 month of ***,a superior Na-ion diffusion kinetics and rate capability are also *** work advances the commercialization process of Na-based layered iron-manganese oxide cathodes;on the other hand,the proposed modification strategy paves the way for the design of high-performance electrode materials relying on anionic redox reactions.

关键词： Na-ion battery P2-Na_(0.67)Fe_(0.5)Mn_(0.5)O_(2) Anionic redox reaction Surface Ti doping

Effects of combined substitution of Dy and Mo or Si on the crystal structures and magnetic properties of Nd_(1-y)Dy_yFe_(11-x)TiM_x(M=Mo,Si) compounds

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Science China Chemistry 2009年第8期52卷 1097-1103页

作者： LI XiangJun,ZHENG Na,hu zhongbo & YUAN ZhuoBin College of Chemistry and Chemical Engineering,Graduate University of Chinese Academy of Sciences,Beijing 100049,China College of Chemistry and Chemical Engineering Graduate University of Chinese Academy of Sciences Beijing China

A series of Nd1-yDyyFe11-xTiMx(M=Mo,Si) alloys have been prepared by arc melting and studied by X-ray diffraction and neutron *** samples are found to crystallize in the ThMn12-type *** lattice parameters a and c and unit cell volume V of Nd0.5Dy0.5Fe11-xTiMox alloys increase linearly with increasing content of Mo(x),while the lattice parameters a and c and unit cell volume V of Nd0.5Dy0.5Fe11-xTiSix alloys decrease linearly with increasing content of Si(x).In NdyDy1-yFe11-xTiMx(M=Mo,Si) compounds,Ti and Mo atoms preferentially occupy the 8i sites and Si atoms preferentially occupy the 8j and 8f *** measurements show that the substitution of Fe by either Mo or Si leads to a decrease in the Curie temperature.

关键词： rare earth-transition metal compounds crystal structure X-ray diffraction neutron diffraction

Tailoring interphase structure to enable high-rate, durable sodium-ion battery cathode

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Journal of Energy Chemistry 2022年第5期31卷 564-571页

作者： Na Li Shaofei Wang Enyue Zhao Wen Yin Zhigang Zhang Kang Wu Juping Xu Yoshihiro Kuroiwa zhongbo hu Fangwei Wang Jinkui Zhao Xiaoling Xiao College of Materials Science and Opto-electronic Technology Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Spallation Neutron Source Science Center Dongguan 523803GuangdongChina Songshan Lake Materials Laboratory Dongguan 523808GuangdongChina Department of Physical Science Hiroshima UniversityHigashihiroshimaHiroshima 739-8526Japan Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

Na-based layered transition metal oxides with O_(3)-type structure have been considered to be promising cathodes for Na-ion batteries. However, the intrinsically limited Na-ion conductivity induced by the Otype Na-coordinate environment compromises their rate and cycle capability, hindering their practical application. Here, we report an interphase-structure tailoring strategy that improves the electrochemical properties of O_(3)-type layered cathodes achieved through surface coating and doping ***, a Zr-doped interphase structure is designed in the model compound NaNi_(1/3)Mn_(1/3)Fe_(1/3)O_(2) using the ionic conductor Na_(3)Zr_(2)Si_(2)PO_(12) as the surface coating material and Zr-dopant provider. We discover that the modified NaNi_(1/3)Mn_(1/3)Fe_(1/3)O_(2)cathode shows a stable Na-storage structure as well as an enhanced rate/cycle capability. Combined with theoretical calculations, it is suggested that the superior electrochemical performances originate from the Zr-doped interphase structure, which has an enlarged Na layer spacing that forms favorable Na-ion diffusion channels. This work highlights a general material interface optimization method which opens a new perspective for fabricating high-performance electrodes for Na-ion batteries and beyond.

关键词： Na-ion battery NaNi_(1/3)Mn_(1/3)Fe_(1/3)O_(2)cathode Interphase structure Zr doping Surface interface modification