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High-throughput data-driven interface design of high-energy-density polymer nanocomposites

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Journal of Materiomics 2020年第3期6卷 573-581页

作者： Zhong-Hui Shen Yang Shen Xiao-Xing Cheng Han-Xing Liu Long-Qing Chen Ce-Wen Nan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and DevicesWuhan University of TechnologyWuhan430070China School of Materials Science and Engineering State Key Lab of New Ceramics and Fine ProcessingTsinghua UniversityBeijing100084China Department of Materials Science and Engineering The Pennsylvania State UniversityUniversity ParkPA16802United States

Understanding the interface effect in dielectric nanocomposites is crucial to the enhancement of their *** this work,a data-driven interface design strategy based on high-throughput phase-field simulations is developed to study the interface effect and then optimize the permittivity and breakdown strength of ***,we use two microscopic features that are closely related to the macroscopic dielectric properties,the thickness and permittivity of the interface phases,to evaluate the role of interfaces in experimental configuration,and thus provide quantitative design schemes for the interfacial *** the polyvinyl difluoride(PVDF)-BaTiO_(3) nanocomposite as an example,the calculation results demonstrate that the interfacial polarization could account for up to 83.6% of the increase in the experimentally measured effective permittivity of the *** on the interface optimized strategy,a maximum enhancement of ~156% in the energy density could be achieved by introducing an interface phase with d/r=0.55 and ε_(interface)/ε_(filler)=0:036,compared to the pristine ***,the present work not only provides fundamental understanding of the interface effect in dielectric nanocomposites,but also establishes a powerful data-driven interface design framework for such materials that could also be easily generalized and applied to study interface issues in other functional nanocomposites,such as solid electrolytes and thermoelectrics.

关键词： Interface Polymer nanocomposites energy storage Data-driven Phase-field simulation

Organic Electrode Materials for Non-aqueous K-Ion Batteries

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Transactions of Tianjin University 2021年第1期27卷 1-23页

作者： Mingtan Wang Wenjing Lu Huamin Zhang Xianfeng Li Division of energy storage Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049 China

The demands for high-performance and low-cost batteries make K-ion batteries(KIBs) considered as promising supplements or alternatives for Li-ion batteries(LIBs). Nevertheless, there are only a small amount of conventional inorganic electrode materials that can be used in KIBs, due to the large radius of K^+ ions. Diff erently, organic electrode materials(OEMs) generally own sufficiently interstitial space and good structure flexibility, which can maintain superior performance in K-ion systems. Therefore, in recent years, more and more investigations have been focused on OEMs for KIBs. This review will comprehensively cover the researches on OEMs in KIBs in order to accelerate the research and development of KIBs. The reaction mechanism, electrochemical behavior, etc., of OEMs will all be summarized in detail and deeply. Emphasis is placed to overview the performance improvement strategies of OEMs and the characteristic superiority of OEMs in KIBs compared with LIBs and Na-ion batteries.

关键词： energy storage KIBs Organic electrode materials Non-aqueous

Hybrid data-based modeling for the prediction and diagnostics of Li-ion battery thermal behaviors

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能源与人工智能(英文) 2022年第4期10卷 73-86页

作者： Adithya Legala Xianguo Li Department of Mechanical and Mechatronics Engineering University of WaterlooWaterlooONN2L 3G1Canada

Lithium-ion battery (LIB) has been deployed for the electrification of the transport sector as a key strategy for climate change mitigation and adaptation. However, it has significant technical challenges such as thermal runaway, requiring a good understanding and accurate prediction of the LIB thermal behavior (heat generation rate). In this study, a novel hybrid approach using an Artificial Neural Network (ANN) is developed for predicting the heat generation rate with discharge current, output voltage, ambient temperature, cell surface temperature, and Depth of Discharge (DOD) as the feature vectors (inputs);where the DOD is estimated with an Extended Kalman Filter (EKF), and direct Coulomb Counting (CC) method, respectively. A shallow neural network utilizing the Marquette-Levenberg algorithm is designed and calibrated using over 8000 cases of the testing data. It is shown that the predicted heat generation rate of LIB agrees well with the experimental results with an accuracy of R > 0.995. Further potential of this hybrid data-based model is evaluated by simulating a thermal management system control and by introducing voltage and current sensor faults for diagnostic purposes. It is shown that, when compared to the experimental value, the relative error of the total heat output generated is less than 2% when there is no sensor fault, and greater than 50% and 25%, respectively, with an induced failure of the current and voltage sensor, demonstrating the ability to build accurate models relying solely on LIB discharge data for sensor diagnostics. This study highlights the combination of using battery thermal behavior with machine learning for real time battery system monitoring, controls and field diagnostics.

关键词： Lithium-ion batteries Artificial neural network Heat generation Kalman filter energy storage

A polyoxometalate redox flow battery: functionality and upscale

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Clean energy 2019年第4期3卷 278-287页

作者： Jochen Friedl Felix LPfanschilling Matthäa VHolland-Cunz Robert Fleck Barbara Schricker Holger Wolfschmidt Ulrich Stimming Chemistry-School of Natural and Environmental Sciences Bedson BuildingNewcastle UniversityNewcastle upon TyneNE17RUUK Present address:BMW AG Petuelring 13080788 MunichGermany Corporate Technology Siemens AG91058 ErlangenGermany

While redox flow batteries carry a large potential for electricity storage,specifically for regenerative energies,the current technology-prone system-the all-vanadium redox flow battery-exhibits two major disadvantages:low energy and low power *** have the potential to mitigate both *** this publication,the operation of a polyoxometalate redox flow battery was demonstrated for the polyoxoanions[SiW_(12)O_(40)]^(4-)(SiW_(12))in the anolyte and[PV_(14)O_(42)]^(9-)(PV14)in the *** was laid on comparing to which extent an upscale from 25 to 1400 cm^(2) membrane area may impede efficiency and operational *** demonstrated that the operation of the large cell for close to 3 months did not diminish operation and the stability of polyoxometalates was unaltered.

关键词： energy storage redox flow battery polyoxometalates upscale

Conventional generation emulation for power grids with a high penetration of wind power

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Clean energy 2021年第1期5卷 93-103页

作者： Rasha El-Azab Eslam M.Wazeer Mohamed Daowd A.M.Abdel Ghany Electrical Power and Machines Department Faculty of EngineeringHelwan UniversityCairoEgypt

Integrating large-scale wind plants with the electricity grids has many challenges for grid *** the variability and uncertainty of wind power,coordinating between different technologies of generation in the same grid can be considered the main problem,specifically for short-term frequency ***,a large penetration of wind power generation in modern power grids has a risky influence on the power-system ***-generation plants have contradictory behaviour compared to classic thermal plants,especially in active generated power-shortage events due to the variable nature of wind *** experience in wind plants keeps part of the available wind power unloaded,using what are known as deloading *** deloading techniques are usually applied to emulate the thermal-plant-governor function and confirm a proper spinning reserve for any active-power *** techniques decrease the generated power from wind plants continuously from maximum point tracking ***,the practical capacity,annual generated energy and economical income of wind plants are *** addition,grid-protection and control sub-schemes are set and designed according to the well-known conventional responses of thermal plants,which increase the need for thermal-plant-behaviour *** this paper,instead of the usual deloading methods,a supercapacitors scheme is proposed with wind turbines to emulate the response of conventional power *** study discusses the technical and economic benefits of the proposed addition of supercapacitors in the wind-plant-planning *** frequency grid-code indices are selected to evaluate studied *** results of the IEEE four-generation two-area system determines the effectiveness of suggested schemes *** System Advisor Model(SAM)program estimates the economic benefits of a typical US study case compared with the existing wind-deloading technique.

关键词： wind energy planning analysis energy storage supercapacitor frequency stability

Recent applications of ionic liquids in quasi-solid-state lithium metal batteries

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Green Chemical Engineering 2021年第3期2卷 253-265页

作者： Jiajia Li Fangfang Li Lan Zhang Haitao Zhang Ulla Lassi Xiaoyan Ji energy Engineering Division of Energy ScienceLuleåUniversity of TechnologyLuleå97187Sweden Beijing Key Laboratory of Ionic Liquids Clean Process Institute of Process EngineeringChinese Academy of SciencesBeijing100190China Sustainable Chemistry Faculty of TechnologyUniversity of OuluOulu90570Finland

Quasi-solid-state lithium metal batteries are considered as one of the most promising energy storage devices,and the application of ionic liquids(ILs)as a new generation of functionalized electrolyte components in lithium metal batteries has become one of the research *** this review,the very recent research work related to using ILs to develop quasi-solid-state electrolytes and their influences on the performances of quasi-solid-state lithium metal batteries were surveyed and summarized,suggesting that the introduction of ILs can improve the ionic conductivity,broaden the electrochemical stability window,and enhance the electrochemical stability of the selected ***,using ILs to prepare high-performance electrodes with unique microstructures and uniform distribution of fillers were also *** composite quasi-solid-state electrolytes were suggested as the mainstream of electrolytes in the future due to the combination of the advantages of inorganic and polymer quasi-solid-state electrolytes,and their development challenges in high energy and high safety quasisolid-state lithium metal batteries were also discussed.

关键词： Ionic liquids Quasi-solid-state electrolytes Lithium metal batteries energy storage

Daily, monthly and annual thermal performance of a linear Fresnel reflector to drive an organic Rankine-cycle system

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Clean energy 2021年第4期5卷 673-689页

作者： Hassan Mahmood Khaled Hossin Mechanical and Construction Engineering University of NorthumbriaNewcastle upon TyneUK Mechanical and Industrial Engineering Department American University of Ras Al KhaimahRas Al KhaimahUnited Arab Emirates Mechanical Engineering Department University of BenghaziBenghaziLibya

The organic Rankine cycle(ORC)coupled with a linear Fresnel reflector(LFR)utilizes a low-grade heat *** article presents the study of a small-scale LFR-ORC power-generation plant under the climatic conditions of Almatret,*** mathematical modelling is performed using thermodynamic equations and simulations are conducted to evaluate the optical performance of the LFR system and thermal performance of the ORC ***-62 is used as a heat-transfer fluid(HTF)in the solar field,whereas NOVEC^(TM) 649 is used as the working fluid in the ORC power *** LFR is integrated with a thermal-storage unit based on a two-tank system and stores the solar thermal energy via a heat *** thermal-energy output of the receiver tube of the LFR system is 108 kW and thermal losses are 7.872 kW during the peak time operation of a day at 1:00 *** mechanical power output of the ORC turbine is 7.296 kW using the specific design conditions and the two-tank thermal-storage system adds 4 operation hours to the power plant after sunset.

关键词： solar energy linear Fresnel reflector energy storage organic Rankine cycle

Novel copper redox-based cathode materials for room-temperature sodium-ion batteries

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Chinese Physics B 2014年第11期23卷 107-110页

作者：徐淑银吴晓燕李云明胡勇胜陈立泉 Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of Sciences

Layered oxides of P2-type Nao.68Cuo.34Mno.6602, P2-type Nao.68Cuo.34Mno.50Tio.1602, and O＇3-type NaCuo.67Sbo.3302 were synthesized and evaluated as cathode materials for room-temperature sodium-ion batteries. The first two materials can deliver a capacity of around 70 mAh/g. The Cu2＋ is oxidized to Cu3＋ during charging, and the Cu3＋ goes back to Cu2＋ upon discharging. This is the first demonstration of the highly reversible change of the redox couple of Cu2＋/Cu3＋ with high storage potential in secondary batteries.

关键词： energy storage sodium-ion battery cathode copper redox

A New Topology Pattern for AC-DC Mixed Microgrid

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Journal of Electronic Science and Technology 2016年第3期14卷 281-286页

作者： Peng Yu Yong Zhang Xing-Hua Liu Peng Zhao Sun Li Rui-Qi Wang Shu-Min Sun Guang-Lei Li Yu-Yao Qu Lin Li the State Grid Shandong Electric Power Research Institute Jinan 250002China the State Grid Zibo Electric Power Company Zibo 255000China the State Grid Shandong Electric Power Corporation Jin 250000Chin. the State Grid Dongying Electric Power Company Dongying 257100China the Zhongshi Yitong Group Co.Ltd. Jinan 250002China

In order to realize the modular design of the microgrid, this paper proposed a new modular topology for the AC-DC mixed microgrid. In that topology, the AC microgrid unit and the DC microgrid unit were packaged together by the back-to-back converter. The battery-supercapacitor hybrid energy storage system was connected to the DC bus of back-to-back converter. By the reasonable design on the battery-supercapacitor hybrid system, the energy storage system could supply the rapid power and energy support for the microgrid spontaneously. The mathematical model and the control algorithm of that microgrid topology were studied. By the simulation analysis, it can be concluded that AC-DC mixed modular microgrid topology could operate steadily on both the grid-connected mode and the isolated mode. Furthermore, we can conclude by the simulation that the designed modular microgrid could operate uninterrupted when the microgrid topology switched from the grid-connected mode to the isolated mode. The seamless switching became the natural property for the modular microgrid. As a result, the modular microgrid topology can be considered as a usual power/load module to realize the friendly power interaction with the power grid.

关键词： Microgrid topology energy storage mode switching operation mode.