检索结果-内蒙古大学图书馆

Unraveling Passivation Mechanism of Imidazolium-Based Ionic Liquids on Inorganic Perovskite to Achieve Near-Record-Efficiency CsPbI_(2)Br Solar Cells

引用

Nano-Micro Letters 2022年第1期14卷 152-166页

作者： Jie Xu Jian Cui Shaomin Yang Yu Han Xi Guo Yuhang Che Dongfang Xu Chenyang Duan Wenjing Zhao Kunpeng Guo Wanli Ma Baomin Xu Jianxi Yao Zhike Liu Shengzhong Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy Devices/Shaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119People’s Republic of China Dalian Institute of Chemical Physics iChEMUniversity of Chinese Academy of SciencesDalian National Laboratory for Clean EnergyChinese Academy of SciencesDalian 116023People’s Republic of China Ministry of Education Key Laboratory of Interface Science and Engineering in Advanced Materials Research Center of Advanced Materials Science and TechnologyTaiyuan University of TechnologyTaiyuan 030024People’s Republic of China Institute of Functional Nano&Soft Materials Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesJoint International Research Laboratory of Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123People’s Republic of China Department of Materials Science and Engineering and Shenzhen Engineering Research and Development Center for Flexible Solar Cells Southern University of Science and TechnologyShenzhen 518055People’s Republic of China State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources North China Electric Power UniversityBeijing 102206People’s Republic of China

The application of ionic liquids in perovskite has attracted wide-spread attention for its astounding performance improvement of perovskite solar cells(PSCs).However,the detailed mechanisms behind the improvement remain ***,a series of imidazolium-based ionic liquids(IILs)with different cations and anions is systematically investigated to elucidate the passivation mechanism of IILs on inorganic *** is found that IILs display the following advantages:(1)They form ionic bonds with Cs^(+)and Pb^(2+)cations on the surface and at the grain boundaries of perovskite films,which could effectively heal/reduce the Cs^(+)/I−vacancies and Pb-related defects;(2)They serve as a bridge between the perovskite and the hole-transport-layer for effective charge extraction and transfer;and(3)They increase the hydrophobicity of the perovskite surface to further improve the stability of the CsPbI_(2)Br *** combination of the above effects results in suppressed non-radiative recombination loss in CsPbI_(2)Br PSCs and an impressive power conversion efficiency of 17.02%.Additionally,the CsPbI_(2)Br PSCs with IILs surface modification exhibited improved ambient and light illumination *** results provide guidance for an indepth understanding of the passivation mechanism of IILs in inorganic perovskites.

关键词： Ionic liquids Inorganic perovskite Imidazolium Passivation High efficiency

来源：评论

学校读者我要写书评

暂无评论

advanced Porous Materials as Designer Platforms for Sequestering Radionuclide Pertechnetate

Chem and Bio Engineering

引用

Chem and Bio engineering 2024年第3期1卷 199-222页

作者： Xing, Zhiwei Lai, Zhuozhi Sun, Qi Xiao, Chengliang Wang, Shuao Wang, Xiangke Aguila-Ames, Briana Thallapally, Praveen K. Martin, Kyle Ma, Shengqian Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology College of Chemical and Biological Engineering Zhejiang University Hangzhou310027 China Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions Soochow University Suzhou215123 China MOE Key Laboratory of Resources and Environmental System Optimization College of Environmental Science and Engineering North China Electric Power University Beijing102206 China New College of Florida 5800 Bay Shore Road SarasotaFL34343 United States Physical and Computational Science Directorate Pacific Northwest National Laboratory Richland RichlandWA99352 United States Department of Chemistry University of North Texas 1508 West Mulberry Street DentonTX76201 United States

Technetium-99 (99Tc), predominantly present as pertechnetate (99TcO4-), is a challenging contaminant in nuclear waste from artificial nuclear fission. The selective removal of 99TcO4- from nuclear waste and contaminated groundwater is complex due to (i) the acidic and intricate nature of high-level liquid wastes;(ii) the highly alkaline environment in low-activity level tank wastes, such as those at Hanford, and in high-level wastes at locations like Savannah River;and (iii) the potential for 99TcO4- to leak into groundwater, risking severe water pollution due to its high mobility. This Review focuses on recent developments in advanced porous materials, including metal-organic frameworks (MOFs), covalent organic frameworks (COFs), and their amorphous counterparts, porous organic polymers (POPs). These materials have demonstrated exceptional effectiveness in adsorbing 99TcO4- and similar oxyanions. We comprehensively review the adsorption mechanisms of these anions with the adsorbents, employing macroscopic batch/column experiments, microscopic spectroscopic analyses, and theoretical calculations. In conclusion, we present our perspectives on potential future research directions, aiming to overcome current challenges and explore new opportunities in this area. Our goal is to encourage further research into the development of advanced porous materials for efficient 99TcO4- management. © 2024 The Authors. Co-published by Zhejiang University and American Chemical Society.

关键词： Groundwater pollution

来源：评论

学校读者我要写书评

暂无评论

Review of Research Advances in CFD Techniques for the Simulation of Urban Wind Environments

引用

Fluid Dynamics & Materials Processing 2022年第2期18卷 449-462页

作者： Pengfei Ju Mingrui Li Jingying Wang Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical EngineeringTianjin University of TechnologyTianjin300384China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education(Tianjin University of Technology) Tianjin300384China School of Energy and Power Engineering Shandong UniversityJinan250061China Shandong Engineering Laboratory for High-Efficiency Energy Conservation and Energy Storage Technology&Equipment Shandong UniversityJinan250061China

Computational fluid dynamics(CFD)has become the main method for the prediction of the properties of the external wind environment in cities and other urban contexts.A review is presented of the existing literature in terms of boundary conditions,building models,computational domains,computational grids,and turbulence *** specific issues,such as the accuracy/computational cost ratio and the exploitation of existing empirical correlations,are also examined.

关键词： Computational fluid dynamics wind environment pre-processing settings

来源：评论

学校读者我要写书评

暂无评论

Proton storage chemistry in aqueous zinc-organic batteries:A review

引用

InfoMat 2023年第2期5卷 45-65页

作者： Xianming Deng James Kumankuma Sarpong Guobin Zhang Jing Hao Xu Zhao Linyuan Li Hongfei Li Cuiping Han Baohua Li Shenzhen Key Laboratory of Power Battery Safety and Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhenPeople's Republic of China School of System Design and Intelligent Manufacturing Southern University of Science and TechnologyShenzhenGuangdongPeople's Republic of China Faculty of Materials Science and Energy Engineering Institute of Technology for Carbon NeutralityShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenPeople's Republic of China Shenzhen Key Laboratory of Energy Materials for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenPeople's Republic of China

Benefiting from the advantageous features of structural diversity and resource renewability,organic electroactive compounds are considered as attractive cathode materials for aqueous Zn-ion batteries(ZIBs).In this review,we discuss the recent developments of organic electrode materials for aqueous *** the proton(H^(+))storage chemistry in aqueous Zn-organic batteries has triggered an overwhelming literature surge in recent years,this topic remains ***,our review focuses on this significant issue and summarizes the reported electrochemical mechanisms,including pure Zn^(2+)intercalation,pure H^(+)storage,and H^(+)/Zn^(2+)***,the impact of H^(+)storage on the electrochemical performance of aqueous ZIBs is discussed *** the significance of H^(+)storage,we also highlight the relevant characterization methods ***,perspectives and directions on further understanding the charge storage mechanisms of organic materials are *** hope that this review will stimulate more attention on the H^(+)storage chemistry of organic electrode materials to advance our understanding and further its application.

关键词： aqueous zinc-ion batteries H^(+)/Zn^(2+)co-storage organic electrode materials proton storage chemistry

来源：评论

学校读者我要写书评

暂无评论

A Practical Approach for Short-Circuit Current Calculation in IIDG-Integrated Distribution Grid 10

A Practical Approach for Short-Circuit Current Calculation i...

引用

10th China International Conference on Electricity Distribution, CICED 2022

作者： Gao, Yi Shi, Hengchu Wu, Shengyang Kong, Dezhi You, Hao Chen, Jing Xu, Shoudong Chen, Jinfu State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China Yunnan Electric Power Dispatching and Controlling Center China Southern Power Grid Kunming China System Analysis Department Scientific Research Institute of Yunnan Power Grid Kunming China

ISBN: (数字)9781665452687

ISBN: (纸本)9781665452687

With an ever-increasing number of inverter interface distributed generations (IIDGs) plugged into the distribution grids, the short-circuit characteristics within the distribution network have dramatically changed. It is, therefore, necessary to perform certain verifications or recalibrations to existing relay settings. The existing short-circuit current calculation methods considering IIDG require iterative solutions, which are incompatible with the non-iterative algorithms embedded in traditional relay setting calculation software. This conflict can give rise to major difficulties in practical industrial applications. Besides, iterative methods may encounter the problem of slow convergence or even no convergence. To break down these barriers, this work proposes a novel approach based on IIDG's point of common coupling (PCC) voltage estimation to calculate IIDG-integrated short-circuit current within engineering permissible error range from the perspective of industrial application. The introduced method first constructs an IIDG equivalent model considering inverters' control strategy. To facilitate the IIDG model's embedment in relay setting calculation software meanwhile remaining its consistency with traditional synchronous machine's fault equivalent model, branches including IIDG are transformed into equivalent series connection form of constant voltage sources and impedances. The analytical expression of the impedance is also ascertained. Utilizing the equivalent model, a non-iterative short-circuit current calculation is conducted, demonstrating better performance in computation efficiency and convergence speed and its compatibility with existing methods in relay setting calculation software. Finally, a simulation is performed on the IEEE 33-bus system to illustrate the superiority of the proposed method. © 2022 IEEE.

关键词： Short circuit currents

来源：评论

学校读者我要写书评

暂无评论

Numerical study on the polydispersive effect of filler size distribution on the properties of thermal interface materials 4

Numerical study on the polydispersive effect of filler size ...

引用

2024 4th International Conference on advanced Materials and Mechatronics, ICAMM 2024

作者： Zong, Ruoyu Liu, Bin Jia, Xiao Wang, Shijun Li, Shikun Huai, Xiulan School of Engineering Science University of Chinese Academy of Sciences Beijing100049 China Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing100190 China Nanjing Institute of Future Energy System Jiangsu Nanjing211135 China State Key Laboratory of Advanced Power Transmission Technology State Grid Smart Grid Research Institute Co. Ltd. Beijing102209 China

advanced thermal interface materials (TIMs) are indispensable for work reliability and lifespan assurance of high-power density electronic systems by facilitating timely and effective heat dissipation. A random algorithm consisting of diluting, dropping, and stirring processes is first proposed to simulate microstructures of TIMs with continuous particle size distribution, with an accessible maximum volume fraction of 55 vol%. Then the size polydispersity impact on the thermal performance and the fluidity of TIMs is numerically investigated. Simulation results reveal that as the particle size polydispersity increases, the thermal conductivity of TIMs improves, along with the improved fluidity. Therefore, it is necessary to consider the polydispersive impact of filler size distribution in actual production and optimize the material preparation process based on the actual distribution of particles. This work provides a deeper understanding of the influence of particle polydispersity on the co-optimization of the desired attributes of TIMs. © Published under licence by IOP Publishing Ltd.

关键词： Thermal insulating materials

来源：评论

学校读者我要写书评

暂无评论

Effect of rotationally accelerated shot peening on the microstructure and mechanical behavior of a metastableβtitanium alloy

引用

Journal of Materials Science & Technology 2021年第16期75卷 27-38页

作者： Xinkai Ma Zhuo Chen Dongling Zhong SNLuo Lei Xiao Wenjie Lu Shanglin Zhang Key Laboratory of Advanced Technologies of Materials(Ministry of Education) School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710072China National Key Laboratory of Reactor System Design Technology Nuclear Power Institute of ChinaChengdu 610041China

Microstructural evolution and deformation mechanism of a metastableβalloy(Ti-10 V-2 Fe-3 Al)processed by rotationally accelerated shot peening(RASP)were systematically investigated with optical microscopy,X-ray diffraction,electron backscatter diffraction and transmission electron *** gradient hierarchical microstructures(gradients inα″martensite andβphase,and hierarchical twins range from the nanoscale to microscale)can be fabricated by RASP via changing the shot peening *** hardening behavior and tensile mechanical properties of gradient hierarchical microstructure were systematically *** deformation twinning systems of{112}α″and{130}<310>α″in the kinkedα″martensite were revealed during the tensile *** was found that stress-induced martensitic transformation,twinnedα″martensite and the related dynamic grain refinement contribute to hardness and work hardening *** improvement of strength and ductility of the metastableα″titanium alloy can be achieved by introducing a gradient hierarchical microstructure.

关键词： Titanium alloys Gradient hierarchical microstructure α″martensite Rotationally accelerated shot peening Mechanical behavior

来源：评论

学校读者我要写书评

暂无评论

Subsynchronous Control Interaction: Real-World Events and Practical Impedance Reshaping Controls 10

Subsynchronous Control Interaction: Real-World Events and Pr...

引用

10th Renewable power Generation Conference, RPG 2021

作者： Xie, Xiaorong Liu, Wei Shair, Jan Dai, Chaobo Liu, Xiaoge State Key Laboratory of Advanced Power Transmission Technology Beijing102209 China State Key Laboratory of Power System Department of Electrical Engineering Tsinghua University Beijing100084 China

ISBN: (纸本)9781839536069

The power electronic converters have enabled the harnessing of electrical energy from renewable resources, such as wind and solar. However, the power electronic converter-based devices can interact with other grid components and lead to unstable oscillation in a wide frequency range, for instance, the subsynchronous and high-frequency oscillations. In the past decade, several subsynchronous control interaction (SSCI) events have been reported, for instance, in the Xcel Energy, ERCOT, Guyuan, and Hami wind power systems. This chapter first provides a brief overview of the occurrence mechanisms and features of various real-world SSCI events. Then, it discusses the practical impedance reshaping mitigation control schemes. The practical installation experience of both generator-side and grid-side impedance reshaping control techniques is provided, which enhances the confidence to practically implement these schemes in the actual power systems that are facing similar challenges. Finally, recommended guidelines and research prospects in the analysis and mitigation are provided. © The Institution of engineering and Technology.

关键词： power converters

来源：评论

学校读者我要写书评

暂无评论

DC Overvoltage Analysis of GFM-controlled Wind Farm Connected via MMC-HVDC system Caused by Receiving-end AC Faults

DC Overvoltage Analysis of GFM-controlled Wind Farm Connecte...

引用

International Conference on power Electronics and Motion Control (IPEMC)

作者： Siying Chen Min Cheng Yingbiao Li Jiawei Yu Yihua Zhu Mingkang Wu Jiabing Hu Jianan Yan State Key Laboratory of Advanced Electromagnetic Technology and School of Electrical and Electronic Engineering Huazhong University of Science and Technology China Yunnan Power Grid China CSG Key Laboratory for Power System Simulation (Electric Power Research Institute China Southern Power Grid) State Key Laboratory of HVDC (Electric Power Research Institute China Southern Power Grid) National Energy Power Grid Technology R&D Centre Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System China

ISBN: (数字)9798350351330

ISBN: (纸本)9798350351347

DC overvoltage occurs when short circuit fault exists at the receiving-end and is harmful to the safety of the system where wind farms are connected to the grid through high-voltage direct current (HVDC) transmission based on the modular multilevel converter (MMC). To address this issue, this paper first analyzed the mechanism of the DC overvoltage and innovatively proposed a strategy in which grid-forming-controlled wind farms are integrated into the AC grid through MMC-HVDC, whose sending-end applies grid-following control and constant DC voltage control. However, secondary DC overvoltage appears during the fault recovery stage and is mainly caused by the saturation of the PI controller of constant active power control. Simulations are carried out on a test with MATLAB/Simulink, and results verify the efficacy of the proposed methods in suppressing DC overvoltage that appeared during receiving-end faults and their recovery stage.

关键词： PI control Simulation power control Wind farms Robustness Wind turbines Safety

来源：评论

学校读者我要写书评

暂无评论

Uncertainty Analysis of FLiNaK Thermophysical Properties on Convective Heat Transfer Characteristics in Circular Tube

SSRN

引用

SSRN 2024年

作者： Li, Haoyang Ding, Ming Guo, Zehua Heilongjiang Provincial Key Laboratory of Nuclear Power System & Equipment Harbin Engineering University Harbin150001 China State Key Laboratory of Multiphase Flow in Power Engineering Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology School of Nuclear Science and Technology Xi’an Jiaotong University Xi’an710049 China

Molten salts have attracted a spate of quantity of interest in energy and chemistry fields due to their large volumetric capacity, and thermodynamic stability at elevated temperatures. However, on account of immature technology and measurement methods, the physical properties of molten salts, such as dynamic viscosity, thermal conductivity, specific heat capacity and density, have large uncertainties, which will be transported with CFD simulation equations and experimental processes. While present investigations normally focus on thermal-hydraulic characteristics, disregarding the impact of uncertainty on reactor safety. Thus, this paper firstly performs a numerical simulation to investigate the thermal-hydraulic performance of FLiNaK (LiF-NaF-KF, 46.5–11.5–42 mol%) in a horizontal tube using a computational fluid dynamic (CFD) tool, STAR-CCM+, and validates the applicability of classic correlations for molten salt. Based on this, an uncertainty analysis methodology, polynomial chaos expansion (PCE) is carried out to analyze the uncertainty that contributes to the heat transfer characteristic. Three primary physical properties of molten salt are considered as the input parameter, tensor product quadrature nodes are employed in this work to calculate the representative sample points to alleviate the computational expense. The contributions of each parameter to heat transfer are also analyzed by the sobol composition method. Finally, deviations in the experimental post-processing (compared with classic correlations) caused by discrepancies in the selected properties from the actual properties due to uncertainty are also taken into account. The result shows the thermal-hydraulic performance can be nicely modeled and simulated results are in good agreement with widely used correlations. Meanwhile, the consequences of uncertainty analysis suggest that the polynomial chaos expansion methodology is robust and neoteric for molten salt analysis. © 2024, The Authors. All righ

关键词： Uncertainty analysis

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：