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Rapid Fabrication of Electrodes for Symmetrical Solid Oxide Cells by Extreme Heat Treatment

Energy & Environmental Materials 2024年第5期7卷 349-356页

作者： Weiwei Fan Zhu Sun manxi wang manxian Li Yuming Chen Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 210096China Department of Nuclear Science and Engineering Massachusetts Institute of TechnologyCambridgeMassachusetts 02139USA School of Materials Science and Engineering Shanghai Jiao Tong University800 Dongchuan RoadShanghai 200240China Zhangjiang Institute for Advanced Study(ZIAS) Shanghai Jiao Tong UniversityShanghai 201210China College of Environmental Science and Engineering and College of Physics and Energy Fujian Normal UniversityFuzhou 350000China

Symmetrical solid oxide cells(SSOCs)are very useful for energy generation and *** fabricate the electrode of SSOC,it is very time-consuming to use the conventional *** this work,we design and develop a novel method,extreme heat treatment(EHT),to rapidly fabricate electrodes for *** show that by using the EHT method,the electrode can be fabricated in seconds(the fastest method to date),benefiting from enhanced reaction *** EHT-fabricated electrode presents a porous structure and good adhesion with the *** contrast,tens of hours are needed to prepare the electrode by the conventional approach,and the prepared electrode exhibits a dense structure with a larger particle size due to the lengthy *** EHT-fabricated electrode shows desirable electrochemical ***,we show that the electrocatalytic activity of the perovskite electrode can be tuned by the vigorous approach of fast exsolution,deriving from the increased active sites for enhancing the electrochemical *** 900℃,a promising peak power density of 966 mW cm^(-2)is *** work exploits a new territory to fabricate and develop advanced electrodes for SSOCs in a rapid and high-throughput manner.

关键词： electrochemical performance extreme heat treatment perovskite electrode symmetrical solid oxide cells

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Research Progress in Lithium-Excess Disordered Rock-Salt Oxides Cathode

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Energy & Environmental Materials 2022年第4期5卷 1139-1154页

作者： manxi wang Xiaochuan Chen Hurong Yao Ganggang Lin Jinhyuk Lee Yuming Chen Qinghua Chen College of Environmental Science and Engineering and College of Physics and Energy Fujian Normal UniversityFuzhou 350000China School of Chemistry Sun Yat-sen UniversityGuangzhou 510275China State Grid Fujian EHV Company Fuzhou 350000China Department of Mining and Materials Engineering McGill UniversityMontrealQC H3A 0C5Canada

The increasing demand for new energy sources has promoted the improvement of the energy storage capacity of lithium-ion batteries(LIBs)that urged the development of higher energy density cathode *** enhancement of the classical cathode in the last 30 years has reached a bottleneck,and then the discovery of the lithium-excess disordered materials has greatly expanded the research space of the cathode *** with the conventional layered oxides,the lithium-excess disordered rock-salt oxides(LEDRXs)with a more stable structure has higher extractable Li^(+)content,even though the inactive high-valent transition metals(TMs)were needed to compensate for the excess Li,which would reduce the total TM redox *** addition,oxygen redox provides additional electron capacity for the materials,which also causes O loss and results in the subsequent poor cycle ***,a series of studies about LEDRXs and their targeted modification measures are summarized,including the prospect of the materials,in order to provide ideas for the design of highperformance ***,the new discoveries and outlook on future research directions of LEDRX cathode materials for LIBs with higher energy density are given.

关键词： disordered rock-salt oxides lithium-excess lithium-ion batteries

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Non-Cooperative Differential Game Based Energy Consumption Control for Dynamic Demand Response in Smart Grid

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China Communications 2019年第8期16卷 107-114页

作者： manxi wang Haitao Xu Shengsong Yang Lifeng Yang Ruifeng Duan Xianwei Zhou State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System Luoyang 471003China School of Computer and Communication Engineering University of Science and Technology BeijingBeijing 100083China

In this paper, we conduct research on the dynamic demand response problem in smart grid to control the energy consumption. The objective of the energy consumption control is constructed based on differential game, as the dynamic of each users’ energy state in smart gird can be described based on a differential equation. Concept of electricity sharing is introduced to achieve load shift of main users from the high price hours to the low price hours. Nash equilibrium is given based on the Hamilton equation and the effectiveness of the proposed model is verified based on the numerical simulation results.

关键词： energy consumption dynamic demand response smart grid differential game nash equilibrium

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Real-time ray-based channel generation and emulation for UAV communications

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Chinese Journal of Aeronautics 2022年第9期35卷 106-116页

作者： Yang YANG Tingpeng LI Xiaomin CHEN manxi wang Qiuming ZHU Ruirui FENG Fuqiao DUAN Taotao ZHANG State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System(CEMEE) Luoyang 471003China College of Electronic and Information Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China

A real-time ray-based hardware emulator for Unmanned Aerial Vehicle(UAV) communication channels which suits for the Three-Dimensional(3D) dynamic scenarios and considers the movements of both terminals is developed in this paper. The time-variant channel parameters, i.e.,ray delay, ray gain, and ray Doppler frequency are precalculated in the host by using the Ray Tracing(RT) method. Meanwhile, RT simulation dramatically increases the number of valid rays. To address the problem of resource limitation and huge computational burden in the implementation,an efficient ray coefficients generation method based on iteration is proposed and *** the advantages of low cost and high flexibility, a Software Defined Radio(SDR) hardware platform is used to emulate the ray-based UAV channels by utilizing the compact architecture including the Time-Division(TD) scheme and Tapped-Delay Line(TDL) for channel ***, hardware measurement results demonstrate that the properties of emulated channel, i.e.,Power Delay Profile(PDP) and Doppler Power Spectrum Density(DPSD) consist with the simulated ones, which verifies the correctness of hardware implementation. The proposed channel emulator provides an efficient way for optimization, verification, and evaluation of UAV communication systems.

关键词： Unmanned aerial vehicle Channel model Ray-based channel emulation Ray tracing Software defined radio Ray coefficient

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Electrospun advanced nanomaterials for in situ transmission electron microscopy:Progress and perspectives

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InfoMat 2023年第12期5卷 1-27页

作者： Jingyue Zhao Zulin Li Shiwen Lv manxi wang Chuanping Li Xuan Li Hongyang Chen manxian Li Xiaochuan Chen Feifeng wang Weiwei Fan Junxiong Wu Ziqiang wang Xiaoyan Li Yuming Chen Engineering Research Center of Polymer Green Recycling of Ministry of Education Fujian Key Laboratory of Pollution Control&Resource ReuseCollege of Environmental and Resource Sciences and College of Carbon Neutral Modern IndustryFujian Normal UniversityFuzhouFujianthe People's Republic of China Department of Materials Science and Engineering and Department of Nuclear Science and Engineering Massachusetts Institute of TechnologyCambridgeMassachusettsUSA Institute of Materials Research Shenzhen International Graduate SchoolTsinghua UniversityShenzhenthe People's Republic of China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujianthe People's Republic of China

Electrospun nanofibers(NFs)have shown excellent properties including high porosity,abundant active sites,controllable diameter,uniform and designable structure,high mechanical strength,and superior resistance to external destruction,which are ideal nanoreactors for in situ *** various techniques,in situ transmission electron microscopy(TEM)has enabled operando observation at the atomic level due to its high temporal and spatial resolution combined with excellent sensitivity,which is of great importance for rational materials design and performance *** this review,the basic knowledge of in situ TEM techniques and the advantages of electrospun nanoreactors for in situ TEM characterization are first *** recent development in electrospun nanoreactors for studying the physical properties,structural evolution,phase transition,and formation mechanisms of materials using in situ TEM is then *** electrochemical behaviors of carbon nanofibers(CNFs),metal/metal oxide NFs,and solidelectrolyte interphase for different rechargeable batteries are ***,challenges faced by electrospun nanoreactors for in situ TEM characterization are discussed and potential solutions are proposed to advance this field.

关键词： batteries electrospun advanced nanofibers in situ transmission electron microscopy nanoreactors

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Nitrogen doping induced by intrinsic defects of recycled polyethylene terephthalate-derived carbon nanotubes

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SusMat 2023年第3期3卷 431-440页

作者： Chuanping Li Lijuan Tong Shuling wang Qian Liu Yaxin wang Xuan Li manxi wang manxian Li Xiaochuan Chen Junxiong Wu Qinghua Chen Yiu-Wing Mai Weiwei Fan Yuming Chen Xiaoyan Li Engineering Research Center of Polymer Green Recycling of Ministry of Education Fujian Key Laboratory of Pollution Control&Resource ReuseCollege of Environmental and Resource Sciences and College of Carbon Neutral Modern IndustryFujian Normal UniversityFuzhouFujianChina Hebei International Joint Research Center for Computational Optical Imaging and Intelligent Sensing School of Mathematics and Physics Science and EngineeringHebei University of EngineeringHandanHebeiChina Centre for Advanced Materials Technology(CAMT) School of AerospaceMechanical and Mechatronics Engineering J07The University of SydneySydneyNew South WalesAustralia Department of Materials Science and Engineering and Department of Nuclear Science and Engineering Massachusetts Institute of TechnologyCambridgeMassachusettsUSA

The indiscriminate utilization of nondegradable polyethylene terephthalate(PET)-based products has triggered serious environmental pollution that has to be resolved vigorously.A simple synthesis of N-doped carbon nanotubes from recycled PET(NCNTs_(r-PET))was developed by a nitric acid-assisted hydrothermal *** results and theoretical calculations show that the intrinsic defects in CNTs_(r-PET)would induce N-doping by NH_(3)generated from nitric acid during the hydrothermal process,thus producing the NCNTs_(r-PET).The life cycle assessment proves that the developed method for N-doped CNTs using r-PET as the carbon source is more environmentally friendly than the conventional chemical vapor deposition using acetylene as the carbon *** a typical application,the NCNTs_(r-PET)delivered an impressive sodium storage capacity with an ultralong *** work not only provides a new route to upcycling waste plastics into valuable carbonaceous materials in an ecofriendly manner,but also reveals a basic understanding of the N-doping mechanism in carbonaceous materials.

关键词： carbon nanotubes defect-induced N-doping life cycle assessment rechargeable batteries recycled PET

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Research progress in electrospinning engineering for all-solid-state electrolytes of lithium metal batteries

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Journal of Energy Chemistry 2021年第10期30卷 253-268,I0008页

作者： manxi wang Yaling Wu Min Qiu Xuan Li Chuanping Li Ruiling Li Jiabo He Ganggang Lin Qingrong Qian Zhenhai Wen Xiaoyan Li Ziqiang wang Qi Chen Qinghua Chen Jinhyuk Lee Yiu-Wing Mai Yuming Chen College of Environmental Science and Engineering Fujian Normal UniversityFuzhou 350000FujianChina Fujian Key Laboratory of Innate Immune Biology Biomedical Research Center of South Chinaand College of Life ScienceFujian Normal UniversityFuzhou 350000FujianChina College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350000FujianChina State Grid Fujian Maintenance Company Fuzhou 350000FujianChina CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350000FujianChina Department of Nuclear Science and Engineering and Department of Materials Science and Engineering Massachusetts Institute of TechnologyCambridgeMA 02139United States Department of Mining and Materials Engineering McGill UniversityMontréalQC H3A 0C5Canada Centre for Advanced Materials Technology(CAMT) School of AerospaceMechanical and Mechatronics Engineering J07The University of SydneyNSW 2006Australia State Key Laboratory of Structural Chemistry Fuzhou 350000FujianChina

Owing to safety issue and low energy density of liquid lithium-ion batteries(LIBs),all-solid-state lithium metal batteries(ASLMBs)with unique all-solid-state electrolytes(SEs)have attracted wide *** arises mainly from the advantages of the SEs in the suppression of lithium dendrite growth,long cycle life,and broad working temperature range,showing huge potential applications in electronic devices,electric vehicles,smart grids,and biomedical ***,SEs suffer from low lithiumion conductivity and low mechanical integrity,slowing down the development of practical *** engineering is of great efficiency in tuning the structure and composition of the SEs with improved lithium-ion conductivity and mechanical *** various available technologies for nanostructure engineering,electrospinning is a promising technique because of its simple operation,cost-effectiveness,and efficient integration with different *** this review,we will first give a simple description of the electrospinning ***,the use of electrospinning technique in the synthesis of various SEs is summarized,for example,organic nanofibrous matrix,organic/inorganic nanofibrous matrix,and inorganic nanofibrous matrix combined with other *** current development of the advanced architectures of SEs through electrospinning technology is also presented to provide references and ideas for designing high-performance ***,an outlook and further challenges in the preparation of advanced SEs for ASLMBs through electrospinning engineering are given.

关键词： Solid-state composite electrolyte Lithium metal batteries Electrospinning engineering Organic/inorganic matrices

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Study of LDPC Coded SFH System with Partial-Band Interference

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Communications and Network 2013年第3期5卷 280-285页

作者： Chao Gong manxi wang Daoxing Guo Xiaofei Pan College of communications engineering PLA University of Science &Technology China The State Key Laboratory of Complex Electromagnetic Environmental Effects on Electronics&Information System China

The application of Low Density Parity Check (LDPC) code in the anti-interference systems has drawn an increasing attention, due to its admiring performance which is very close to the theory limit. This paper focuses on a LDPC encoded slow frequency hopping (SFH) communication system with partial-band interference. Firstly, a modified soft- decision algorithm based on the utilization of interference information is proposed, and its performance is compared with some other soft-decision methods. Secondly, with numerical simulation, the influence of code rate, code length and the number of symbols per hops on the performance of the system with partial band noise interference is illustrated and examined in detail. Considering the great influence of hops per symbol on the performance, interleaver should be used and its influence on the performance is further examined by simulation. Finally, some constructive advises for the design of LDPC coded SFH system are given. Simulation results show that, with a reasonable design, the SFH system with LDPC code could achieve a desirable performance.

关键词： LDPC SFH Soft-decision Partial-band Interference

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Electrospinning Engineering Enables High‑Performance Sodium‑Ion Batteries

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Advanced Fiber Materials 2022年第1期4卷 43-65页

作者： Chuanping Li Min Qiu Ruiling Li Xuan Li manxi wang Jiabo He Ganggang Lin Liren Xiao Qingrong Qian Qinghua Chen Junxiong Wu Xiaoyan Li Yiu‑Wing Mai Yuming Chen College of Environmental Science and Engineering Fujian Normal UniversityFuzhou 350000FujianChina College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350000China State Grid Fujian Maintenance Company Fuzhou 350000FujianChina Department of Mechanical Engineering The Hong Kong Polytechnic UniversityKowloonHong KongChina Centre for Advanced Materials Technology(CAMT) School of AerospaceMechanical and Mechatronics Engineering J07The University of SydneySydneyNSW 2006Australia

As a promising energy storage device,sodium-ion batteries(SIBs)have received continuous attention due to their low-cost and environmental ***,the sluggish kinetics of Na ion usually makes SIBs hard to realize desirable electrochemical performance when compared to lithium-ion batteries(LIBs).The key to addressing this issue is to build up nanostructured materials which enable fast Na-ion insertion/***-dimensional(1D)nanocarbons have been considered as both the anode and the matrix to support active materials for SIB electrodes owing to their high electronic conductivity and excellent mechanical *** of their large surface areas and short ion/electron difusion path,the synthesized electrodes can show good rate performance and cyclic stability during the charge/discharge *** is a simple synthetic technology,featuring inexpensiveness,easy operation and scalable production,and has been largely used to fabricate 1D nanostructured *** this review,we frst give a simple description of the electrospinning principle and its capability to construct desired nanostructures with diferent ***,we discuss recent developments of carbon-based hybrids with desired structural and compositional characteristics as the electrodes by electrospinning engineering for ***,we identify future research directions to realize more breakthroughs on electrospun electrodes for SIBs.

关键词： Sodium-ion batteries Electrospinning engineering Carbonaceous substrate Hybrid

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放大转发中继网络中绿色的物理层安全通信技术

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电子与信息学报 2016年第4期38卷 841-847页

作者：王东李永成白铂王满喜电子信息系统复杂电磁环境效应国家重点实验室洛阳471003 清华大学电子工程系北京100084 新星技术研究所合肥230031

该文基于物理层安全理论,针对能量受限的无线中继网络提出一种绿色的保密通信方案。该方案在节点功率约束和系统最小目标保密速率要求下,通过最优功率控制实现系统的安全能效最大化,并基于分式规划、对偶分解和DC(Difference of Convex ... 详细信息

该文基于物理层安全理论,针对能量受限的无线中继网络提出一种绿色的保密通信方案。该方案在节点功率约束和系统最小目标保密速率要求下,通过最优功率控制实现系统的安全能效最大化,并基于分式规划、对偶分解和DC(Difference of Convex functions)规划理论提出了一种迭代的功率分配算法。通过仿真比较,能效优化可以显著提升系统的安全能效,然而相对于保密速率最大化会有一定保密速率损失,这是由于能效和保密之间存在固有的折中。但是,能效优化的保密速率仍然大于发送总功率最小化的保密速率。

关键词：信息安全能量效率物理层安全功率分配放大转发中继

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