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Lithium-Sulfur Batteries at Extreme Temperatures:Challenges,Strategies and Prospects

Energy & environmental Materials 2023年第4期6卷 297-311页

作者： Wenjia Qu Jingyi Xia Chong Luo Chen Zhang Renjie Chen Wei Lv Quanhong Yang Nanoyang Group State Key Laboratory of Chemical EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Beijing Key Laboratory of Environmental Science and Engineering School of Material Science and EngineeringBeijing Institute of TechnologyBeijing 10081China School of Marine Science and Technology Tianjin UniversityTianjin 300072China Shenzhen Geim Graphene Center Engineering Laboratory for Functionalized Carbon MaterialsTsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China

High-energy-density-batteries working at a wide-temperature range are urgently required in many performance-critical ***-sulfur batteries(LSB)are promising high-energy-density batteries that have the potential to maintain high performance at extreme ***,some problems like severe shuttling and safety issues at high temperatures or sluggish reaction kinetics and charge-transfer process at low temperatures decrease the performance and hinder their practical uses in extreme temperature ***,broadening the working temperature of LSB with stable electrochemical performance becomes a crucial *** this paper,the key stumbling blocks for high and low-temperature LSB are comprehensively *** solutions from the aspects of electrolyte and electrode materials are discussed to solve the aggravating shuttle effect and thermal safety issues under high temperature and the sluggish reaction kinetics under low ***,some specific promising solutions to extend the operating temperature range of LSB are also proposed and highlighted,which provide potential research directions on the practical LSB application in future.

关键词： high temperature lithium-sulfur batteries low temperature safety issue shuttle effect

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reliability analysis of k-out-of-n system with load-sharing and failure propagation effect

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Journal of Systems engineering and Electronics 2021年第5期32卷 1221-1231页

作者： CHEN Ying MA Qichao WANG Ze LI Yingyi Science and Technology on Reliability and Environmental Engineering Laboratory Beihang UniversityBeijing 100191China Institute of Electronic Engineering China Academy of Engineering PhysicsMianyang 621999China

In complex systems,functional dependency and physical dependency may have a coupling *** this paper,the reliability of a k-out-of-n system is analyzed considering load-sharing effect and failure mechanism(FM)*** types of FMs are considered and an accumulative damage model is proposed to illustrate the system behavior of the k-out-of-n system and the coupling effect between load-sharing effect and FM propagation effect.A combinational algorithm based on Binary decision diagram(BDD)and Monte-Carlo simulation is presented to evaluate the complex system behavior and reliability of the k-out-of-n system.A current stabilizing system that consists of a 3-out-of-6 subsystem with FM propagation effect is presented as a case to illustrate the complex behavior and to verify the applicability of the proposed *** to the coupling effect change,the main mechanism and failure mode will be changed,and the system lifetime is *** are analyzed and results show that different sensitivity factors of three different FMs lead to the change of the development rate,thus changing the failure *** the coupling effect may lead to an incomplete and ineffective measuring and monitoring *** strategies must be adopted to make the FM propagation insensitive to load-sharing effect.

关键词： k-out-of-n system load-sharing effect failure mechanism propagation damage factor model combinational algorithm

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Degradation Evaluation of Neutron Irradiation Effect on AlGaN/GaN Metal-Insulator- Semiconductor High Electron Mobility Transistors 25

Degradation Evaluation of Neutron Irradiation Effect on AlGa...

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25th International Conference on Electronic Packaging technology, ICEPT 2024

作者： Duan, Xiaoyue Li, Pinbo He, Liang Shi, Yijun Chen, Xinghuan Ni, Yiqiang Liu, Jun He, Zhiyuan Chen, Yiqiang School of Electrical Engineering University of South China Science and Technology on Reliability Physics and Application of Electronic Component Laboratory Hengyang China Science and Technology on Reliability Physics and Application of Electronic Component Laboratory Guangzhou China School of Electrical Engineering University of South China Hengyang China School of Integrated Circuits Guangdong University of Technology Guangzhou China

ISBN: (纸本)9798350353808

We investigate the degradation effects of neutron irradiation on AIGaN/GaN metal-insulator-semiconductor high electron mobility transistors (MIS-HEMTs) in this work. The performance of the devices is characterized through relevant electrical current-voltage (I-V) test and capacitance- voltage (C-V) test. The result indicates that the electrical parameter of the device degrades after neutron irradiation, such as positive shift of threshold voltage, reduction in output drain current, and the increase of the on-resistance. Additionally, combining with the frequency-dependent conductance method, it displays that shallow energy level- interface states at the AIGaN/GaN heterojunction increase, along with slightly shifting to deeper energy level after neutron irradiation. Neutron irradiation introduces more interface states and increase the scattering which degrading the carrier concentration and mobility, causing related degradation on electrical performances. This study provides useful reference value for the application of GaN-based devices in the aerospace. © 2024 IEEE.

关键词： Gallium nitride

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Characterization of Bacterial Communities in Aerosols over Northern Chinese Marginal Seas and the Northwestern Pacific Ocean in Autumn

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Journal of Ocean University of China 2023年第1期22卷 136-150页

作者： ZHANG Bo ZHEN Yu MI Tiezhu QI Jianhua YUAN Gang Key Laboratory of Marine Environment and Ecology Ministry of EducationOcean University of ChinaQingdao 266100China Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China

The characteristics of the bacterial community structure in aerosols of different particle sizes over northern Chinese marginal seas and the northwestern Pacific Ocean in autumn were analyzed using high-throughput sequencing and the quantitative real-time PCR method based on 16S rRNA *** with environmental factors and air mass sources,the bacterial abundance,community diversity,composition and structural characteristics in aerosols were studied,which might provide a scientific evaluation for a comprehensive understanding of the characteristics,long-distance transmission and ecological effects of aerosols from coastal waters to the distant ocean(northwestern Pacific Ocean).At the junction of the South Yellow Sea and the East China Sea,the bacterial abundance in the aerosols was substantially affected by transmission of continental air masses and was higher than those in other samples,and the bacterial abundance in coarse particle(>2.1μm)samples was significantly higher than that in fine particle(<2.1μm)samples(P<0.05).In contrast,aerosols collected at the northwestern Pacific Ocean(NWP5 site)were less affected by transmissions of continental air masses,and their bacterial abundance in coarse particle samples was significantly lower than that in fine particle *** differences in the richness and diversity of bacterial communities were observed among all samples(P<0.05).The differences in the bacterial community in different sea areas were greater than those in the same sample with different particle sizes(P>0.05).Among the environmental factors examined,a significant negative correlation was observed between bacterial community richness and temperature(P<0.05),and the bacterial community diversity was significantly positively correlated with the concentration of K^(+)(P<0.05).Canonical correspondence analysis showed that temperature,NH_(4)^(+) concentration and SO_(4)^(2−) concentration exerted significant effects on bacterial community struc

关键词： bioaerosol marine environment community structure particle size

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High-efficiency Fe(III)-doped ultrathin VO_(2)nanobelts boosted peroxydisulfate activation for actual antibiotics photodegradation

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Chinese Chemical Letters 2025年第3期36卷 199-205页

作者： Shukun Le Peng Wang Yuhao Liu Mutao Xu Quansheng Liu Qijie Jin Jie Miao Chengzhang Zhu Haitao Xu Inner Mongolia Key Laboratory of High-Value Functional Utilization of Low Rank Carbon Resources Chemical Engineering CollegeInner Mongolia University of TechnologyHohhot 010050China School of Environmental Science and Engineering Nanjing Tech UniversityNanjing 210009China Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOEQingdao University of Science and TechnologyQingdao 266042China

It has been challenging for Fe(III)regeneration in Fe-based photocatalysts for continuous peroxydisulfate(PDS)activation due to the lower ability to reduce Fe(III).In this work,Fe-doped ultrathin VO_(2)(Fe-VO_(2))nanobelts were synthesized for purifying metronidazole(MNZ)via PDS *** an efficient Fentonlike catalyst for PDS activation,2 wt%Fe-doped VO_(2)can remove 98%of MNZ within 40 min and exhibits impressive *** synergistic effect of Fe-VO_(2)and Fe(III)activated PDS boosted the photocatalytic ***,SO_(4)•^(−),h+,O_(2)•^(−),^(1)O_(2),and•OH were the main reactive *** effects of initial MNZ concentration,Fe-VO_(2),PDS dosage,and various anions/cations on MNZ removal by the Fe-VO_(2)/PDS/Vis system were *** intermediates of MNZ degradation and possible pathways were determined by density function theory(DFT)calculations and *** study provided a sustainable technology using Fe-doped ultrathin VO_(2)nanobelts for photocatalytic PDS activation and decontamination of pharmaceutical wastewater.

关键词： Fe-doped VO_(2)nanobelts Photodegradation Persulfate activation Antibiotics removal Bimetallic cycle

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A novel online analyzer for accurate and rapid measurement of volatile fatty acids in anaerobic wastewater treatment

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Journal of environmental sciences 2022年第12期34卷 72-82页

作者： Qingshan Lin Yanchao Yuan Feixiang Zan Hui Lu Zongping Wang Gang Guo School of Environmental Science and Engineering Huazhong University of Science and Technology(HUST)Key Laboratory of Water and Wastewater TreatmentMOHURDWuhan 430074China Department of Environmental Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China School of Environmental Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China

Volatile fatty acids(VFAs), which are largely generated during the anaerobic acidification process, are considered to be reliable indicators of the stable process operation. However,the common methods for monitoring VFAs are offline, and they are typically manual requiring time-consuming, costly and complex instruments. This study aims to develop a novel online analyzer for automatic measuring VFAs, which was based on the 5-p H point titration, embedded with a proportional-integral-derivative(PID) feedback control system. The results show that it can achieve accurate and rapid monitoring of VFAs ranging between 0-400 mg/L(<9 min/sample) but simultaneously faces the problems of overtitration and interference of complex characteristics of wastewater. In order to improve its accuracy and stability, the effects of three general coefficients(K_(I),K_(P), and K_(D)) of PID on the titration were investigated, and the optimal values of K_(I), K_(P), and K_(D)were found to be 1.5, 1.0, and-1.0~0.5,respectively. Besides, the initial titration speed was set at 0.06 m L/min, equal to the minimum speed of the peristaltic pump, and the dichotomy approach was integrated into the PID feedback controller. Owing to the above improvements, the relative mean deviation and standard deviation of measuring VFAs in both synthetic and real wastewaters were mostly lower than 5.0% and 5.0 mg/L, proving the online analyzer is rapid, accurate and reliable.

关键词： Volatile fatty acids Online analyzer 5-pH point titration PID feedback control Anaerobic process

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The Approach of Equipment Degradation Processes Considering Self-Recovery Characteristics 14

The Approach of Equipment Degradation Processes Considering ...

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14th International Conference on reliability, Maintainability and Safety, ICRMS 2023

作者： Zhou, Weixuan Lv, Chuan Geng, Jie Jin, Yuxue Zhang, Miao Gao, Zhuoying School of Reliability and Systems Engineering Beihang University Beijing China State Key Laboratory of Virtual Reality Technology and System Beihang University Beijing China Key Laboratory of Reliability and Environmental Engineering Beihang University Beijing China

ISBN: (纸本)9798350329988

Recent research in the process of equipment state evolution emphasizes the comprehensive consideration of the event process. However, the process does not consider the self-recovery capability of equipment in detail. In view of this problem, a detailed explanation of the self-recovery characteristics is given. Subsequently, a self-recovery model for equipment is established. Furthermore, the degradation process considering self-recovery is established. Finally, a numerical analysis is carried out to give the degradation process curve with self-recovery characteristics. The result shows that the degradation process can reflect the state evolution process more comprehensively for the equipment with self-recovery capability. © 2023 IEEE.

关键词： Degradation process Gamma process Self-recovery Shock process

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Cerium valence state conversion:Fabrication and environmental remediation of modified CeO_(2)materials

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Journal of Rare Earths 2025年第3期43卷 430-440,I0001页

作者： Jia'ao Han Quansheng Liu Haitao Xu Yang Wu Shukun Le Chengzhang Zhu Inner Mongolia Key Laboratory of High-Value Functional Utilization of Low Rank Carbon Resources Chemical Engineering CollegeInner Mongolia University of TechnologyHohhot010050China School of Environmental Science and Engineering Nanjing Tech UniversityNanjing210009China National Observation and Research Station of Coastal Ecological Environments in Macao Macao Environmental Research InstituteMacao University of Science and TechnologyMacao SAR999078China Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOEQingdao266042China

Rare earth elements are highly applicable in photocatalysis due to their partially filled 4f orbitals,existing in electronic structures that facilitate the transfer of electrons during the reaction *** these materials,CeO_(2)has a distinctive external electronic structure(4f^(1)5d^(1)6s^(2)),abundant oxygen vacancies,and strong conversion ability of Ce^(4+)/Ce^(3+),which makes it an attractive candidate in the field of *** broaden its practical applications in the visible region,the drawbacks of a wide band gap and a slow Ce^(4+)/Ce^(3+)cycle have been addressed through the modification of CeO_(2),thereby accelerating light absorption and self-circulation,and enhancing photocatalytic *** paper presents a review of the preparation of modified CeO_(2)catalysts and their application in the conversion of cerium valence state in the photocatalytic degradation of pollutants in ***,this paper presents a summary of the most recent development and current challenges,as well as prospect for the application of modified CeO_(2)-based materials.

关键词： Rare earths Modified CeO_(2) Ce^(4+)/Ce^(3+)pairs Photoactivity environmental remediation

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Source identification and prediction of nitrogen and phosphorus pollution of Lake Taihu by an ensemble machine learning technique

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Frontiers of environmental science & engineering 2023年第5期17卷 27-40页

作者： Yirong Hu Wenjie Du Cheng Yang Yang Wang Tianyin Huang Xiaoyi Xu Wenwei Li CAS Key Laboratory of Urban Pollutant Conversion Department of Environmental Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China School of Software Engineering University of Science and Technology of ChinaHefei 230026China USTC-CityU Joint Advanced Research Center Suzhou Institute for Advanced Research of USTCSuzhou 215123China National and Local Joint Engineering Laboratory for Municipal Sewage Resource Utilization Technology Suzhou University of Science and TechnologySuzhou 215009China

Effective control of lake eutrophication necessitates a full understanding of the complicated nitrogen and phosphorus pollution sources,for which mathematical modeling is commonly *** contrast to the conventional knowledge-based models that usually perform poorly due to insufficient knowledge of pollutant geochemical cycling,we employed an ensemble machine learning(ML)model to identify the key nitrogen and phosphorus sources of *** ML models were developed based on 13 years of historical data of Lake Taihu’s water quality,environmental input,and meteorological conditions,among which the XGBoost model stood out as the best model for total nitrogen(TN)and total phosphorus(TP)*** results suggest that the lake TN is mainly affected by the endogenous load and inflow river water quality,while the lake TP is predominantly from endogenous *** prediction of the lake TN and TP concentration changes in response to these key feature variations suggests that endogenous source control is a highly desirable option for lake eutrophication ***,one-month-ahead prediction of lake TN and TP concentrations(R2 of 0.85 and 0.95,respectively)was achieved based on this model with sliding time window lengths of 9 and 6 months,*** work demonstrates the great potential of using ensemble ML models for lake pollution source tracking and prediction,which may provide valuable references for early warning and rational control of lake eutrophication.

关键词： Eutrophication Machine learning Water quality Nutrients Prediction

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Impact of wastewater treatment plant effluent discharge on the antibiotic resistome in downstream aquatic environments:a mini review

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Frontiers of environmental science & engineering 2024年第3期18卷 131-141页

作者： Zhiguo Su Lyujun Chen Donghui Wen School of Environment Tsinghua UniversityBeijng 100084China 2 Zhejiang Provincial Key Laboratory of Water Science and Technology Department of Environmental Technology and EcologyYangtze Delta Region Institute of Tsinghua UniversityJiaxing 314050China College of Environmental Sciences and Engineering Peking UniversityBeijing 100871China

Antimicrobial resistance(AMR)has emerged as a significant challenge in human *** treatment plants(WWTPs),acting as a link between human activities and the environment,create ideal conditions for the selection and spread of antibiotic resistance genes(ARGs)and antibioticresistant bacteria(ARB).Unfortunately,current treatment processes are ineffective in removing ARGs,resulting in the release of large quantities of ARB and ARGs into the aquatic environment through WWTP ***,in turn,leads to their dispersion and potential transmission to human through water and the food *** safeguard human and environmental health,it is crucial to comprehend the mechanisms by which WWTP effluent discharge influences the distribution and diffusion of ARGs in downstream *** this study,we examine the latest researches on the antibiotic resistome in various waterbodies that have been exposed to WWTP effluent,highlighting the key influencing ***,recommendations for future research and management strategies to control the dissemination of ARGs from WWTPs to the environment are provided,with the aim to achieve the“One Health”objective.

关键词： Antibiotic resistance genes(ARGs) Wastewater treatment plants(WWTPs) Effluent-receiving waterbodies environmental risk Influencing mechanism

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