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Phase segregation of a composite air electrode unlocks the high performance of reversible protonic ceramic electrochemical cells

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Energy and Environmental Science 2024年第11期17卷 3898-3907页

作者： He, Fan Hou, Mingyang Liu, Dongliang Ding, Yong Sasaki, Kotaro Choi, YongMan Guo, Shihang Han, Donglin Liu, Ying Liu, Meilin Chen, Yu School of Environment and Energy South China University of Technology 382 East Road Higher Education Mega Center Guangzhou510006 China State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Nanjing210009 China School of Material Science and Engineering Georgia Institute of Technology 771 Ferst Dr NW AtlantaGA30309 United States Chemistry Division Brookhaven National Laboratory UptonNY11973 United States College of Photonics National Yang Ming Chiao Tung University Tainan71150 Taiwan College of Energy Soochow University No 1 Shizi Street Gusu District Suzhou215006 China Research Institute of Renewable Energy and Advanced Materials Zijin Mining Group Co. Ltd Xiamen Fujian361101 China

One breakthrough in developing highly efficient air electrodes for reversible protonic ceramic electrochemical cells (R-PCECs) is optimizing the sluggish oxygen reduction and water oxidation reactions. Here, we present a novel composite material with a nominal formula of high-entropy Ce0.2Ba0.2Sr0.2La0.2Ca0.2CoO3−δ (CBSLCC) that spontaneously self-assembles to three-phase electrocatalysts composed of deficient Ce0.2−yBa0.2Sr0.2−xLa0.2−xCa0.2CoO3−δ (CD-CBSLCC), CeO2, and La0.5Sr0.5CoO3−δ (LSC). Mechanistic studies corroborate that oxygen reduction may occur on entire air electrode surfaces, followed by water formation preferentially at or near CD-CBSLCC. The CeO2 phase could provide or consume protons to facilitate the oxygen evolution/reduction kinetics in R-PCECs. The developed electrodes demonstrate a record-high electrochemical performance in dual modes of fuel cells and electrolysis cells, delivering a peak power density of 1.66 W cm−2 at 600 °C and a current density of −1.76 A cm−2 at 1.3 V and 600 °C. Excellent operational stabilities of the fuel cell (200 h at 600 °C), electrolysis cell (200 h at 600 °C), and reversible cycling (548 h at 550 °C) provide a promising and reliable step towards realizing the commercialization of R-PCECs. © 2024 The Royal Society of Chemistry

关键词： Cerium oxide

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Inertia Provision of DFIG-Based Wind Turbines by Improving the Damping Ratio of PLL

Inertia Provision of DFIG-Based Wind Turbines by Improving t...

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Energy Technologies for Future Grids (ETFG), IEEE International Conference on

作者： Yini Zhou Wei He Donghai Zhu Xudong Zou Zhikun Wang Weilin Hou School of Electrical and Electronic Engineering State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China State Grid Shandong Electric Power Company Dongying Power Supply Company Dongying China China Electric Power Research Institute Beijing China

Due to the rapid control of power electronics, it results that the wind turbines (WTs) typified by double-fed induction generator (DFIG) based WTs do not have inertia response capability. Many inertia control methods have been proposed, but they suffer from large structural modifications, high cost, poor adaptability, and slow response. In this regard, this paper first analyzes the inertia response characteristics of DFIG-based WT and further reveals principle of achieving power response of WTs from controlling the phase-locked angle. Then, why the WTs have no inertia response capacity is analyzed when a typical phase-locked loop (PLL) is adopted. Based on this, an inertia response strategy of DFIG-Based WTs by improving the damping ratio of PLL is put forward, and frequency domain response characteristic of it is compared and analyzed with those of typical PLL. Finally, a simulation system of synchronous generator (SG) and an aggregated WT farm is built in MATLAB/Simulink for verification.

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A Profit-Sharing Mechanism for Coordinated Power-Traffic System

arXiv

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arXiv 2025年

作者： Sima, Tianyu Yan, Mingyu Wen, Jianfeng Luo, Wensheng Malinowski, Mariusz State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China Department of Electrical Engineering and Electronics University of Liverpool LiverpoolL69 3GJ United Kingdom School of Electrical Engineering and Automation Harbin Institute of Technology Harbin150001 China Institute of Control and Industrial Electronics Warsaw University of Technology Warsaw Poland

During the scheduling process, the traffic network operator (TNO) and the distribution network operator (DNO) act non-cooperatively. Under the TNO's management, the distribution of charging loads may exacerbate the local supply-demand imbalance in the power distribution network (PDN), which negatively impacts the economic operation of the PDN. This paper proposes a profit-sharing mechanism based on the principle of incentive compatibility for coordinating the traffic network (TN) and the PDN to minimize the operation cost of PDN. Under this mechanism, the scheduling process of the power-traffic system is divided into two stages. At the pre-scheduling stage, the TNO allocates traffic flow and charging loads without considering the operation of the PDN, after which the DNO schedules and obtains the original cost. At the rescheduling stage, the DNO shares part of benefits of the optimal operation to the TNO to re-dispatch the EVs’ charging to obtain a more effective charging plan, thus minimize the overall cost of PDN. Then, a bilevel model is developed to simulate the operation of the power-traffic system with the proposed sharing scheme and identify the best sharing ratio. Finally, numerical results demonstrate that the PDN can achieve the minimum total cost and simultaneously the TN can also benefit from the proposed profit-sharing mechanism. © 2025, CC BY-NC-ND.

关键词： Profitability

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The first observations of beta-induced Alfvén eigenmodes in edge remnant magnetic island on J-TEXT 48

The first observations of beta-induced Alfvén eigenmodes in...

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48th European Physical Society Conference on Plasma Physics, EPS 2022

作者： Yang, J. Liang, Y. Wang, N.C. Shi, P. Chen, Z.P. Zhou, S. Mao, F.Y. Xu, X. Yang, Q.H. Hua, J.K. Li, C.K. Li, D. Jiang, Z.H. International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China Jülich52425 Germany United Kingdom Atomic Energy Authority Culham Centre for Fusion Energy Culham Science Centre Oxon AbingdonOX14 3DB United Kingdom

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A General Dead Time Compensation Method Based on Current Ripple Prediction and Pulse Delay Measurement for Voltage Source Inverter 12

A General Dead Time Compensation Method Based on Current Rip...

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12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020

作者： Shen, Zewei Jiang, Dong Chen, Jianan Liu, Zicheng Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering China

ISBN: (纸本)9781728158266

This paper introduces a general dead time compensation method for voltage source inverter. By analyzing the dead time effect caused by the current freewheeling and switching delay, the precise dead time compensation can be implemented by reconstructing the actual phase current with the general current ripple prediction and pulse delay measurement. Simulation and experimental results are provided to validate the proposed method with good performance, and the proposed method can be extended to different topologies and modulation schemes. © 2020 IEEE.

关键词： Forecasting

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Roles of non-axisymmetric perturbations in free drift vertical displacement events on EAST

arXiv

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arXiv 2024年

作者： Li, Haolong Zhu, Ping Li, Hang Wu, Muquan Zhu, Xiang Luo, Jingting College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen518060 China State Key Laboratory of Advanced Electromagnetic Technology International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China Department of Nuclear Engineering and Engineering Physics University of Wisconsin-Madison MadisonWI53706 United States Advanced Energy Research Center Shenzhen University Shenzhen518060 China

The safe operation of most tokamaks, especially the largen sized ones, rely on the feedback control of the vertical displacement events (VDEs). However, most these feedback control systems are based on the axisymmetric VDE models. In this work, we use NIMROD simulations to study the roles of non-axisymmetric perturbations in free drift vertical displacement events on EAST. The high-n modes in non-axisymmetric VDE grow first, which drive the formation of high-n magnetic island chains. Subsequently, the magnetic island chains grow and overlap with each other, leading to the destruction of the magnetic flux surface, which induces a minor disruption and accelerates the start of the following major disruption. The magnetic island and the stochastic magnetic field allow the toroidally asymmetric poloidal plasma current to jet towards the hoop force direction, forming the finger and filamentary structures. Such a plasma current asymmetry strongly depends on the anisotropy in thermal transport coefficients. Copyright © 2024, The Authors. All rights reserved.

关键词： Feedback control

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Dear-DIA^(XMBD): Deep Autoencoder Enables Deconvolution of Data-Independent Acquisition Proteomics

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Research 2024年第1期6卷 707-720页

作者： Qingzu He Chuan-Qi Zhong Xiang Li Huan Guo Yiming Li Mingxuan Gao Rongshan Yu Xianming Liu Fangfei Zhang Donghui Guo Fangfu Ye Tiannan Guo Jianwei Shuai Jiahuai Han Department of Physics and Fujian Provincial Key Laboratory for Soft Functional Materials ResearchXiamen UniversityXiamen 361005China Oujiang Laboratory(Zhejiang Lab for Regenerative Medicine Vision and Brain Health)and Wenzhou InstituteUniversity of Chinese Academy of SciencesWenzhouZhejiang 325001China School of Life Sciences Xiamen UniversityXiamen 361102China State Key Laboratory of Cellular Stress Biology Innovation Center for Cell Signaling NetworkXiamen 361102China Department of Computer Science Xiamen UniversityXiamen 361005China National Institute for Data Science in Health and Medicine School of MedicineXiamen UniversityXiamen 361102China Bruker(Beijing)Scientific Technology Co.Ltd. BeijingChina Westlake Laboratory of Life Sciences and Biomedicine Key Laboratory of Structural Biology of Zhejiang ProvinceSchool of Life SciencesWestlake University18 Shilongshan RoadHangzhou 310024China Institute of Basic Medical Sciences Westlake Institute for Advanced Study18 Shilongshan RoadHangzhou 310024China Westlake Omics Ltd. Yunmeng Road 1HangzhouChina Department of Electronic Engineering Xiamen UniversityXiamen 361005China

Data-independent acquisition(DIA)technology for protein identification from mass spectrometry and related algorithms is developing *** spectrum-centric analysis of DIA data without the use of spectra library from data-dependent acquisition data represents a promising *** this paper,we proposed an untargeted analysis method,Dear-DIA^(XMBD),for direct analysis of DIA ***-DIA^(XMBD) first integrates the deep variational autoencoder and triplet loss to learn the representations of the extracted fragment ion chromatograms,then uses the k-means clustering algorithm to aggregate fragments with similar representations into the same classes,and finally establishes the inverted index tables to determine the precursors of fragment clusters between precursors and peptides and between fragments and *** show that Dear-DIA^(XMBD) performs superiorly with the highly complicated DIA data of different species obtained by different instrument platforms.

关键词： Deep Auto Independent

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Ultra-thick Dry-process Cathode Design through Formula Optimization

Ultra-thick Dry-process Cathode Design through Formula Optim...

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2024 International Conference on Green Energy and Mechatronics engineering, ICGEME 2024

作者： Wang, Fengqian Du, Baoshuai Xu, Li Guan, Minyuan Lou, Ping Tang, Shun Cheng, Shijie Cao, Yuan-Cheng State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China State Grid Shandong Electric Power Research Institute Jinan250003 China Beijing Institute of Smart Energy Huairou Laboratory Changping District Beijing102209 China Huzhou Power Supply Company State Grid Zhejiang Electric Power Company Ltd. Huzhou313000 China

Lithium-ion batteries is an indispensable energy storage device in wind energy and solar energy grid-connected system. Solvent-free electrodes manufacturing processes as a new technology have attracted increasing scientific interest due to their cost reduction, ecological friendliness, and ability to increase electrode density. The coordination between the various components plays a crucial and pivotal role in shaping the physical and electrochemical performance of the electrode. In this research, through rational formulation optimization, it is possible to determine the optimal manufacturing parameters for improving performance, such as cycle stability and energy density. Improving battery performance can accelerate the spread of various applications, including electric vehicles and grid-scale energy storage. Studies have shown that when the conductive agent/binder is 5:2, the cycle stability and specific capacity of the battery is the best, under the condition of 0.5 C, even at a high load of 55.4 mg/cm2, it can still play 153.5 mAh /g specific capacity, and the capacity retention rate after 100 cycles is 82.0%. This will make the application of lithium batteries in wind and solar grid-connected systems more extensive and efficient. © Published under licence by IOP Publishing Ltd.

关键词： Lithium-ion batteries

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A Method to Simplify the Markov Model of Protective Systems

A Method to Simplify the Markov Model of Protective Systems

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IEEE Conference on Energy Internet and Energy System Integration (EI2)

作者： Xingzhu Wang Yongxin Chen Minghao Wen State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China Grid Center State Grid Hubei Electric Power Research Institute Wuhan China

The state space approach is a common method for conducting reliability assessment of protective systems. However, as more factors affecting the reliability of protective relay are considered, the system Markov model is becoming more and more complex and its solving efficiency is decreasing. To avoid this, a method to simplify the Markov model of protective system is proposed in this paper. Based on the continuous-time Markov process (CTMP), the theory underlying the state space approach, the method illustrates that the duration of the protective system in the switching states can be neglected. In other words, the protection switching state can be ignored when developing a Markov model of protective system. This method is applied to two existing models, one for a protection/component system and the other for redundant protective systems. The study results show that the method significantly reduces the complexity of the Markov model and improves the solving efficiency without reducing the capability of Markov model to describe the reliability of protective systems.

关键词： Protection switching Protective relaying Switches System integration Markov processes Reliability theory Complexity theory

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Terahertz Metamaterial Sensor in a High-Q Photonic Crystal Cavity

Terahertz Metamaterial Sensor in a High-Q Photonic Crystal C...

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International Conference on Infrared and Millimeter Waves

作者： Lei Cao Shanshan Jia Mark D. Thomson Fanqi Meng Hartmut G. Roskos State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China Physikalisches Institut Goethe-University Frankfurt Frankfurt am Main Germany

ISBN: (数字)9781728194271

ISBN: (纸本)9781728194288

We investigate whether metamaterial (MM) embedded in a one-dimensional high-Q photonic crystal (PC) cavity has the potential to be a better terahertz (THz) sensor than a MM (or a PC cavity) alone, when the MM strongly couples with the cavity photons. The resonant frequency shift induced by an analyte on the MM in the cavity is smaller than that obtained with the MM alone. This is attributed to the larger mode volume according to the dielectric perturbation theory. However, the phase sensitivity of the MM is larger than that of the MM alone, which opens a new route for the realization of improved THz phase-sensitive sensors.

关键词： Terahertz metamaterials Sensitivity Perturbation methods Resonant frequency Photonic crystals Metamaterials Dielectrics

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