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Journal of Energy Chemistry 2024年第3期90卷 58-76,I0004页

作者： Shaoxiong Han Ziqi wang Yue Ma Yanlan Zhang yongzhen wang Xiaomin wang College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024ShanxiChina Shanxi Joint Laboratory of Coal based Solid Waste Resource Utilization and Green Ecological Development Taiyuan 030024ShanxiChina

Garnet solid electrolytes are one of the most promising electrolytes for solid-state batteries.However,Li_(2)CO_(3) is a critical issue that hinders the practical application of garnet-based solid-state lithium-ion batteries.There are two sources of Li_(2)CO_(3) contamination.The main one is the aging of garnet electrolytes in the *** electrolytes can react with H_(2)O and CO_(2) in the air to form Li_(2)CO_(3),which reduces ion conductivity,increases electrode/garnet electrolyte interface resistance,and deteriorates the electrochemical performance of the battery.Various strategies,such as elemental doping,grain boundary manipulation,and interface engineering,have been suggested to address these issues.The other is the passivation layer(Li_(2)CO_(3),Li_3N,LiOH,Li_(2)O) formed on the surface of the lithium foil after long-term storage,which is ignored by most researchers.To better understand the current strategies and future trends to address the Li_(2)CO_(3) problem,this perspective provides a systematic review of journals published in this field from 2020-2023.

关键词： Solid-state batteries Garnet electrolytes Air stability Interface engineering Lithium foil contamination

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Fast ion-conducting high-entropy garnet solid-state electrolytes with excellent air stability

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Journal of Advanced Ceramics 2023年第6期12卷 1201-1213页

作者： Shaoxiong Han Ziqi wang Yue Ma Yang Miao Xiaomin wang Yong wang yongzhen wang College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Shanxi Joint Laboratory of Coal based Solid Waste Resource Utilization and Green Ecological Development Taiyuan 030024China

The garnet-type electrolyte is one of the most promising solid-state electrolytes(SSEs)due to its high ionic conductivity(σ)and wide electrochemical window.However,such electrolyte generates lithium carbonate(Li_(2)CO_(3))in air,leading to an increase in impedance,which greatly limits their practical applications.In turn,high-entropy ceramics(HECs)can improve phase stability due to high-entropy effect.Herein,high-entropy garnet(HEG)Li_(6.2)La_(3)(Zr_(0.2)Hf_(0.2)Ti_(0.2)Nb_(0.2)Ta_(0.2))_(2)O_(12)(LL(ZrHfTiNbTa)O)SSEs were synthesized by the solid-state reaction method.X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),electrochemical impedance spectroscopy(EIS),and scanning electron microscopy(SEM)characterizations indicated that the LL(ZrHfTiNbTa)O electrolyte has excellent air stability.Room-temperature conductivity of LL(ZrHfTiNbTa)O can be maintained at~1.42×10^(-4)S/cm after exposure to air for 2 months.Single-element-doped garnets were synthesized to explain the role of different elements and the mechanism of air stabilization.In addition,a lithium(Li)/LL(ZrHfTiNbTa)O/Li symmetric cell cycle is stable over 600 h,and the critical current density(CCD)is 1.24 mA/cm^(2),indicating remarkable stability of the Li/LL(ZrHfTiNbTa)O interface.Moreover,the LiFePO_(4)/LL(ZrHfTiNbTa)O/Li cell shows excellent rate performance at 30℃.These results suggest that HECs can be one of the strategies for improving the performance of SSEs in the future due to their unique effects.

关键词： solid-state batteries high-entropy ceramics(HECs) garnet electrolytes air stability

Low-carbon building heating system coupled with semiconductor radiation heating and distributed PV:A simulation analysis in two Chinese climate zones

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Building Simulation 2023年第7期16卷 1059-1079页

作者： Yan Zhang Kai Han yongzhen wang Wenjie Ji Lanlan Zhang Wei Zhang School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China Innovation Center in Chongqing Beijing Institute of TechnologyChongqing 401120China Department of Energy and Power Engineering Tsinghua UniversityBeijing 100089China

Building is an important scenario for achieving global carbon peak and carbon neutrality goals,accounting for approximately 37%of global energy-related CO_(2) emissions in 2020.In the meanwhile,the construction and operation of buildings was responsible for 36%of global energy consumption,of which 30%energy was used for space heating.Therefore,this paper proposes a low-carbon building heating system that is coupled to a new semiconductor radiation heating unit and distributed rooftop photovoltaic to reduce carbon emissions.To reveal its building heating characteristics,a dynamic model of heat transfer based on semiconductor low-temperature radiant heating is first established by analyzing the heat conduction,convection,and radiation models,and the uncertainty from both the distributed rooftop photovoltaic and building heating demand is considered in the building heating operation strategy.Then,a simulation model of a low-carbon building heating system is built in MATLAB/SIMULINK for two different climate zones in China(Beijing and Wuhan).When building and using the low-carbon building heating system stable for 30 years,the payback period is 5.2–8.2 years in Beijing and 6.4–11.6 years in Wuhan.Compared with the traditional grid-powered heating system,the simulation revealed that the carbon emissions of Beijing and Wuhan during the heating season are reduced by 44.9%and 44.3%,respectively,and the corresponding building heating cost is saved by 62.1%and 57.8%.

关键词： radiation heating low-carbon building heating semiconductor distributed photovoltaic simulation optimization

A bibliometric analysis of Stirling engine and in-depth review of its application for energy supply systems

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Energy Reviews 2023年第4期2卷 12-34页

作者： Lanlan Zhang Kai Han yongzhen wang Yilin Zhu Shengyuan Zhong Geyu Zhong School of Mechanical Engineering Beijing Institute of TechnologyBeijing100081China School of Energy and Environmental Engineering Hebei University of TechnologyTianjin300401China Innovation Center in Chongqing Beijing Institute of TechnologyChongqing401120China Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing100190China Science and Technology Research Institute China Three Gorges CorporationBeijing100038China

With the great advantages and continuous innovations,prolific research efforts have been devoted to the Stirling engine(SE)domain driven by the sustainability development.In this study,a bibliometric analysis is conducted to explore the research tend and hotspots of SE.The country co-authorship,institute co-authorship and keyword networks are engendered from the visual map using VOSviewer,showing China ranks the first with the total number of published articles and the majority publications are presented by Chinese Academy of Sciences.Owing to the highest node centrality,the research findings in USA can be considered the most influential and greatly worthy being referred,particularly represented by the early contribution for thermo-acoustic SE.The total 7 keyword clusters are classified through the top terms in Citespace and 4 of them are related to its energy supply system,demonstrating the typical application of SE-based combined heat and power(CHP)and integrated multi-energy complementary system have gained much attention.Based on this,a detailed review of SE-based energy supply systems is further conducted through the system forms,4E performance evaluation and soft model combing optimization solutions.Several relevant issues hindering the improvement of these terms are summa-rized,providing the potential guides to help develop the SE-based energy supply system.

关键词： Stirling engine Bibliometric analysis Energy supply system 4E performance evaluation Model and optimization

Thermal Management Optimization of a Lithium-Ion Battery Module with Graphite Sheet Fins and Liquid Cold Plates

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Automotive Innovation 2020年第4期3卷 336-346页

作者： Guohua wang Qing Gao Yuying Yan yongzhen wang State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130025China Faculty of Engineering University of NottinghamNottingham NG72RDUK Department of Thermal Engineering Jilin UniveristyNanling CampusChangchun 130022China

Temperature uniformity of lithium-ion batteries and maintaining the temperature within the range for efficient operation are addressed.First,Liquid cold plates are placed on the sides of a prismatic battery,and fins made of aluminum alloy or graphite sheets are applied between battery cells to improve the heat transfer performance.Then a simulation model is built with 70 battery cells and 6 liquid cold plates,and the performance is analyzed according to the flow rate,liquid temperature,and discharge rate.Finally,the results show that temperature differences are mainly caused by the liquid cold plates.The fin surface determines the equivalent thermal conductivity of the battery.The graphite sheets have heterogeneous thermal conductivity,which help improve temperature uniformity and reduce the temperature gradient.With lower density than the aluminum alloy,they offer a lower gravimetric power density for the same heat transfer capacity.In addition to the equivalent thermal conductivity,the temperature difference between the cooling liquid and battery surface is an important parameter for temperature uniformity.Optimizing the fin thickness is found to be an effective way to reduce the temperature difference between the liquid and battery during cooling and improve the temperature uniformity.

关键词： Thermal management Lithium-ion battery Liquid cold plate Temperature uniformity

Study on Buildings CCHP System Based on SOFC

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Fluid Dynamics & Materials Processing 2020年第3期16卷 665-674页

作者： Bin Zhang yongzhen wang Jiaqing Zheng Dan Liu School of Civil Engineering and Architecture Linyi UniversityLinyi276000China

The relationship among the working temperature,pressure and current density of a Solid oxide fuel cell(SOFC)and its output power and efficiency are analyzed in the framework of a theoretical model able to provide,among other things,the volt ampere characteristic curve.In particular,following the principle of temperature matching and cascade utilization,we consider a gas turbine(GT)and a LiBr absorption chiller to recycle the high-grade exhaust heat produced by the considered SOFC.This distributed total energy system is set up with the intent to meet typical needs of buildings for cooling,heating and power(CCHP).The total power generated by the considered SOFC and gas turbine is about 222 kW and the total power generation efficiency by low heat value of fuel(LHV)is 63.7%.In the CCHP system,the high temperature exhaust of GT is further used to drive LiBr absorption unit,which can produce about 34.8 kW cooling capacity or 84.5 kW of heat(the total energy utilization 78.03%).

关键词： SOFC gas turbine absorption chiller CCHP total energy system

面向真实战场环境的Transformer-CNN多特征聚合图像去雾算法

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兵工学报 2024年第4期45卷 1070-1081页

作者：王永振童鸣燕雪峰魏明强南京航空航天大学计算机科学与技术学院江苏南京210016 软件新技术与产业化协同创新中心江苏南京210093

军事智能系统的发展对现代战争的作战方式和制胜机理产生重大影响,然而这些系统容易受到雾霾等天气的影响导致获取的图像出现模糊、退化等问题,给后续识别、追踪等作战任务带来挑战,因此对战场含雾图像进行复原非常重要。鉴于获取同一... 详细信息

军事智能系统的发展对现代战争的作战方式和制胜机理产生重大影响,然而这些系统容易受到雾霾等天气的影响导致获取的图像出现模糊、退化等问题,给后续识别、追踪等作战任务带来挑战,因此对战场含雾图像进行复原非常重要。鉴于获取同一场景下的含雾、清晰图像对难度极大,现有网络大都采用合成数据进行训练;但真实雾图和合成雾图之间的间隙,会导致在合成数据下训练的模型在真实场景中泛化性差。为此,提出一种面向真实战场环境的自注意力模型-卷积神经网络(Transformer-Convolutional Neural Network,Transformer-CNN)多特征聚合图像去雾算法。采用半监督框架,利用合成和真实战场含雾图像训练网络,使模型能够更好地应对真实含雾场景。采用双分支特征聚合架构,将CNN分支提取的局部特征和Transformer分支学习的全局特征进行聚合,以进一步提高模型去雾能力。为模拟真实战场含雾场景,构建了一套含雾战场图像数据集。实验结果表明,与8种最先进的图像去雾算法相比,所提算法在合成数据和真实图像上均表现良好。

关键词：军事智能图像去雾半监督网络 Transformer-CNN 特征聚合

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一种基于语义引导和对比学习的战场图像去烟算法

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兵工学报 2024年第2期45卷 671-683页

作者：熊佳梅王永振燕雪峰魏明强南京航空航天大学计算机科学与技术学院江苏南京211106 软件新技术与产业化协同创新中心江苏南京210093

烟雾作为现代战争中最常见的作战产物,不可避免地会降低作战场景的可视性,进而影响下游军事智能系统的性能,因此对含烟图像进行复原处理非常重要,现有算法通常忽略图像中高阶的语义信息和降质图像本身都可以为提高网络去烟能力提供有价... 详细信息

烟雾作为现代战争中最常见的作战产物,不可避免地会降低作战场景的可视性,进而影响下游军事智能系统的性能,因此对含烟图像进行复原处理非常重要,现有算法通常忽略图像中高阶的语义信息和降质图像本身都可以为提高网络去烟能力提供有价值的监督信息。为此,提出一种基于语义引导和对比学习的生成对抗网络来去除战场图像中的烟雾。通过在低阶视觉任务中融入高阶语义特征,将语义信息作为引导帮助网络更好地恢复图像的结构和色彩信息;利用对比学习范式将清晰和含烟图像构建为正、负样本,并采用对比约束使去烟后的图像与清晰图像接近,并远离含烟图像。此外,为模拟真实的战场含烟场景,首次构建一套含烟战场数据集,推进了相关研究的发展。实验结果表明,与现有图像去烟算法相比,所提方法在定量和定性指标上均达到了先进水平。

关键词：军事智能图像去烟生成对抗网络语义引导对比学习注意力机制

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A Micro S-Shaped Optical Fiber Temperature Sensor Based on Dislocation Fiber Splice

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Photonic Sensors 2017年第4期7卷 372-376页

作者： Haitao YAN Pengfei LI Haojie ZHANG Xiaoyue SHEN yongzhen wang College of Physics Engineering Henan University of Science & Technology Luoyang 471003 China The Puyang Photoelectric Industry Technology Institute Pu Yang 457100 China

We fabricated a simple, compact, and stable temperature sensor based on an S-shaped dislocated optical fiber. The dislocation optical fiber has two splice points, and we obtained the optimal parameters based on the theory and our experiment, such as the dislocation amount and length of the dislocation optical fiber. According to the relationship between the temperature and the peak wavelength shift, the temperature of the environment can be obtained. Then, we made this fiber a micro bending as S-shape between the two dislocation points, and the S-shaped micro bending part could release stress with the change in temperature and reduce the effect of stress on the temperature measurement. This structure could solve the problem of sensor distortion caused by the cross response of temperature and stress. We measured the S-shaped dislocation fiber sensor and the dislocation fiber without S-shape under the same environment and conditions, and the S-shaped dislocation fiber had the advantages of the stable reliability and good linearity.

关键词： Dislocated optical fiber temperature sensor interference cross-sensitivity

热电联产型共享储能的技经分析与市场机制研究

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全球能源互联网 2024年第2期7卷 190-200页

作者：冶兆年韩恺王永真何继江丑鹏北京理工大学能源与动力工程系北京市海淀区100085 北京理工大学重庆创新中心重庆市渝北区401120 清华大学社会科学学院能源转型与社会发展研究中心北京市海淀区100081 新疆鹏煜能源科技集团有限公司新疆维吾尔自治区哈密市839000

以可再生能源和储能为主体的新型能源系统建设已成为能源转型的发展趋势。针对当前电化学储能面临技术经济性差以及供用能在品质上存在不匹配的问题,基于能量梯级综合利用的理念和共享经济的模式,提出热电联产型共享储能系统的技术与业... 详细信息

以可再生能源和储能为主体的新型能源系统建设已成为能源转型的发展趋势。针对当前电化学储能面临技术经济性差以及供用能在品质上存在不匹配的问题,基于能量梯级综合利用的理念和共享经济的模式,提出热电联产型共享储能系统的技术与业态,探讨该类储能的基本运行原理、技术经济特性和商业模式。以高温固体蓄热、余热锅炉与汽轮机组成的典型热电联产型共享储能系统的案例分析表明,以固体蓄热为储能设备的热电联产型共享储能系统,在现有市场环境下实现系统经济性最优的容量配置和运行调度时,系统内部收益率达到10.6%、投资回收期为8.2 a。同时,研究并揭示了容量租赁比例、辅助服务价格、供热以及储能单位投资对共享储能电站技术经济性能的影响规律。最后,从技术及市场层面对热电联产型共享储能系统存在的等效储能容量、多重收益模式等关键问题进行了讨论。

关键词：共享储能热电联产新型能源系统综合能源商业模式

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