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A green recyclable Li3VO4-pectin electrode exhibiting pseudocapacitive effect as an advanced anode for lithium-ion battery

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Journal of Energy Storage 2023年 72卷

作者： Su, Yu-Hsuan Chung, Chin-Yi Chen, Yan-Ruei Wu, Feng-Yu Lin, Ya-Huei Chi, Po-Wei Wu, Phillip M. Paul, Tanmoy Lin, Hwai-En Chang-Liao, Kuei-Shu Wang, Sea-Fue Wu, Maw-Kuen Institute of Physics Academia Sinica 128 Section 2 Academia Road Taipei11529 Taiwan Nano Science and Technology Program Taiwan International Graduate Program Academia Sinica and National Tsing Hua University 128 Section 2 Academia Road Taipei11529 Taiwan Department of Engineering and System Science National Tsing Hua University 101 Section 2 Kuang-Fu Road Hsinchu300044 Taiwan 1 Section 3 Zhongxiao E. Rd. Taipei106 Taiwan 1 Section 3 Zhongxiao E. Road Taipei106 Taiwan Research Institute for Sustainable Energy TCG Centres for Research and Education in Science and Technology BIPL Building Salt Lake Kolkata700091 India

Battery system design and development is prioritizing environmentally friendly recycling processes to ensure a sustainable future for our planet. The reuse of active materials in Li-ion batteries is critical for this goal. Herein, we investigated the electrochemical performance of Li3VO4 (LVO) anode with pectin as a binder. Our Li-ion half-cells showed stable capacity of 230 mAh g−1 at a current density of 0.02 A g−1 after 100 cycles. In addition, we observed a novel enhanced specific capacity of 400 mAh g−1 during delithiation at a high current density of 1 A g−1, which did not occur during lithiation. This higher capacity was can be attributed to the pseudocapacitive lithium storage behavior in the LVO-pectin electrode, as identified by CV and EIS analyses. The heterostructure of LVO-pectin resulted in an interfacial surface charge that contributed to the capacity, as demonstrated by impedance spectroscopy in conjunction with the distribution of relaxation times. The utilization of pectin as an eco-friendly binder demonstrated nearly 90 % material recovery and 100 % capability for subsequent re-lithiation, indicating recyclability. Furthermore, the pseudocapacitive effect becomes increasingly dominant in regenerated LVO-pectin cells. These results exemplify a promising approach towards the development of environmentally friendly Li-ion batteries with high energy and power density. © 2023 Elsevier Ltd

关键词： Lithium-ion batteries

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Transient heat transfer calculation method for multi-dimensional building envelope thermal bridges with variable insulation thicknesses 14

Transient heat transfer calculation method for multi-dimensi...

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14th International Conference on Thermal Performance of the Exterior Envelopes of Whole buildings 2019

作者： Hemmati, Farhad Tariku, Fitsum Building Science Graduate Program British Columbia Institute of Technology BurnabyBC Canada Building Science Centre of Excellence British Columbia Institute of Technology BurnabyBC Canada

Hourly dynamic energy performance study of buildings requires in-depth understanding of dynamic thermal performance of building envelope assemblies. Several studies performed by others have so far confirmed the necessity of considering correct thermal storage behavior of building envelope assemblies in dynamic hourly building energy simulations. Two and three-dimensional building envelope thermal bridges have significant impact on effective heat performance, and once coupled with the effect of heat storage, the dynamic heat transfer through the assembly can be significantly different from the one obtained from steady-state calculation methods. In this study, a simplified transient heat transfer model based on frequency response of RC-Network (FR-RCN) is presented that could generate the equivalent model for the same assembly with different continuous insulation thickness simply by systematically modifying the original RC-Network coefficients. In this study, two mass type structures are considered and their dynamic responses in a climate that is characterized with cold winter and hot summer (Toronto climate - climate zone 6) are analyzed using the proposed simplified method. As a validation exercise, the results calculated using equivalent FR-RCN are compared with solutions obtained from finite element analysis using COMSOL, and found to be in good agreement. In addition, the heat flux of the assemblies was calculated based on liner transmittance method and compared with the proposed method, and showed significant difference. In general, the FR-RCN variable insulation thickness method is found to be efficient, fast and flexible calculation method with good accuracy. © 2019 U.S. Government.

关键词： Frequency response

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Identification of T – pier construction work activities on the elevated railway project to develop work breakdown structure

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AIP Conference Proceedings 2023年第1期2877卷

作者： Pungky Dharma Saputra Luxpetrus Agustian Suhandi Nina Purwanti Muhammad Hamzah Fansuri Anasya Arsita Laksmi Military Building Construction Engineering Study Program Faculty of Military Engineering Indonesia Defense University Bogor Indonesia Civil Engineering Study Program School of Engineering & Technology Tanri Abeng University Jakarta Indonesia

The development of elevated railway infrastructures in Indonesia is going rapidly. The uniqueness of the T-Pier construction in the elevated railway project is the construction method that causes many activities to execute. The explained activities in the construction method were not clear, neither treated in much detail. In line with the problem, this research aim is to identify T-Piers construction work activities specifically. The project sample was MRT Jakarta CP 103 elevated section and T-Pier construction was the object of the case study. The first stage of this research was archive analysis, expert validation, and surveying of 100 bridge engineers. The collected data were analyzed by the descriptive analysis method. Then the work breakdown structure tree diagram was developed and shown the activities development. There were 31 activities identified starting from preparation until finishing and grouped into the main section group of activities i.e. pile cap, pier column, installation, and dismantling of temporary shoring, and pier head group activities. All the experts agreed that the activities identified were valid and almost all respondents 100% agree. The activities identified were at level 5 in the work breakdown structure development. The detailed activities can be standardized as a reference in future similar projects.

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Optimizing H-Darrieus Wind Turbine Performance with Double-Deflector Design

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Energies 2024年第2期17卷 503页

作者： Chen, Wei-Hsin Lam, Trinh Tung Chang, Min-Hsing Jin, Liwen Chueh, Chih-Che Augusto, Gerardo Lumagbas Department of Aeronautics and Astronautics National Cheng Kung University Tainan701 Taiwan Research Center for Smart Sustainable Circular Economy Tunghai University Taichung407 Taiwan Department of Mechanical Engineering National Chin-Yi University of Technology Taichung411 Taiwan International Degree Program on Energy Engineering National Cheng Kung University Tainan701 Taiwan Department of Energy Engineering National United University Miaoli360 Taiwan Institute of Building Environment and Sustainable Technology School of Human Settlements and Civil Engineering Xi’an Jiaotong University Xi’an712000 China Mechanical Engineering Department De La Salle University 2401 Taft Avenue Manila0922 Philippines

This study aims to improve an H-Darrieus vertical-axis wind turbine (VAWT) by imposing a novel double-deflector design. A computational fluid dynamics (CFD) model was implemented to examine the aerodynamic characteristics of the VAWT with double deflectors. Geometrics factors related to the locations of the two deflectors were considered, and the orthogonal array based on the Taguchi method was constructed for CFD simulation. The CFD results were further provided as the training data for the artificial neural network (ANN) to forecast the optimal configuration. The results indicate that the performance of a VAWT with a double-deflector design could exceed that of a bare VAWT or that of one using a single deflector. The mean power coefficient for a bare VAWT is 0.37, although it could be much higher with a proper setup using double deflectors. The prediction of ANN analysis is consistent with the result of CFD simulation, in which the difference between the ANN prediction and CFD simulation is generally less than 4.48%. The result confirms the accuracy of the prediction of the optimal VAWT performance with a double-deflector design. © 2024 by the authors.

关键词： Neural networks

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Robotic additive construction of bar structures: Unified sequence and motion planning

arXiv

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arXiv 2021年

作者： Huang, Yijiang Garrett, Caelan R. Ting, Ian Parascho, Stefana Mueller, Caitlin T. Building Technology Program Department of Architecture Massachusetts Institute of Technology CambridgeMA02139 United States Computer Science and Artificial Intelligence Laboratory Massachusetts Institute of Technology CambridgeMA02139 United States Princeton University CREATE Laboratory School of Architecture PrincetonNJ08544 United States

Additive robotic construction of building-scale discrete bar structures, such as trusses and space frames, is increasingly attractive due to the potential improvements in efficiency, safety, and design possibilities. However, programming complex robots, such as manipulators with seven degrees of freedom, to successfully complete construction tasks can be tedious, challenging, or impossible for a human to do manually. Namely, the structure must be constructed in a sequence that preserves structural properties, such as stiffness, at each step. At the same time, this sequence must allow for the robot to precisely manipulate elements within the in-progress structure while respecting geometric constraints that, for example, ensure the robot does not collide with what it has built. In this work, we present an automated and newly generalized planning approach for jointly finding a construction sequence and robot motion plan for additive construction that satisfies these requirements. Our approach can be applied in a variety of additive construction processes, and we demonstrate it specifically on spatial extrusion and discrete bar assembly in this paper. We demonstrate the effectiveness of our approach on several simulated and real-world extrusion and assembly tasks, including a human-scale physical prototype, for which our algorithm is deployed for the first time to plan the assembly of a complicated double tangent bar system design. © 2021, CC BY.

关键词： Additives

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Iron carbonyl polymer microspheres for simultaneously high-speed adsorption and desorption of dye-emulsified micelles with frequency manipulation under an alternating electric field

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Chemical Engineering Journal 2023年 469卷

作者： Wang, Yu-Xiang Chang, Chi-Jung Lu, Chien-Hsing Chen, Jem-Kun Department of Materials Science and Engineering Taiwan Building Technology Center National Taiwan University of Science and Technology 43 Sec. 4 Keelung Road Taipei10607 Taiwan Department of Chemical Engineering Feng Chia University 100 Wenhwa Road Seatwen Taichung40724 Taiwan Department of Obstetrics and Gynecology Taichung Veterans General Hospital Taichung Taiwan Institute of Biomedical Sciences Ph.D. Program in Translational Medicine and Rong-Hsing Research Center for Translational Medicine National Chung-Hsing University Taichung940227 Taiwan

Developing a versatile methodology for high-speed water purification is critical for environmental and water source protection. Traditional adsorption and desorption were determined based on the concentration gradients. Herein, a versatile methodology is reported based on the simple application of an alternating electric field (AEF) on a system including dye-emulsified micelles (DEM) and adsorbents that simultaneously exhibit high-speed adsorption and desorption of DEM by frequency manipulation. Iron carbonyl polymers are incorporated into polystyrene microspheres (PMs) to generate iron carbonyl polystyrene microspheres (ICPMs) as adsorbents, which can vary the affinity with DEM and dielectric properties simultaneously. Both the DEM and microspheres were polarized under the AEF and generated electric dipole moments that could rapidly assemble the DEM and microspheres. Compared with the adsorption through the concentration gradient, the adsorption rate of DEM was enhanced significantly in the presence of an AEF of 20 V at 150 kHz of frequency because of the effect of particle assembly. At 1000 kHz of frequency, the alternative high-speed change between electrostatic attraction and repulsion hindered the adsorption of the dyes, which could also enhance the desorption rate. The ICPMs could be recycled 10 times within 20 min with frequency manipulation in the presence of AEF. This versatile methodology could provide novel insights into the development of high-speed water purification techniques. © 2023 Elsevier B.V.

关键词： Polystyrenes

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Wetting challenges in treatment of raw textile wastewater by membrane distillation: A case study

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Case Studies in Chemical and Environmental Engineering 2025年 11卷

作者： Rodrigues, Mariana E. Cucciniello, Raffaele Farinha, Andreia Vrouwenvelder, Johannes Fortunato, Luca Biological & Environmental Science & Engineering Division (BESE) King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Environmental Science & Engineering Program (EnSE) King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Dipartimento di Chimica e Biologia Università di Salerno Via Papa Paolo Giovanni II Fisiciano SA 84100 Italy Department of Biotechnology Faculty of Applied Sciences Delft University of Technology Van der Maasweg 9 HZ Delft 2629 Netherlands Department of Civil Building and Environmental Engineering University of Napoli Federico II Via Claudio 21 Napoli 80125 Italy

This case study investigated the effectiveness of Direct Contact Membrane Distillation (DCMD) in treating real textile wastewater. Textile wastewater treatment presents a critical challenge in the field of environmental sustainability, requiring innovative approaches for its treatment to mitigate adverse impacts on ecosystems. DCMD emerges as a promising solution for the treatment and reuse of textile wastewater. However, the intricate composition of real textile wastewater represents a major bottleneck for the process, as the effectiveness of DCMD is influenced by numerous factors, complicating its application. In this study, experiments with an untreated sample demonstrate the detrimental impact of suspended solids on membrane performance. The application of simple pretreatment steps prior to DCMD, involving sedimentation and filtration, substantially enhanced the quality of the permeate, resulting in 100 % color removal, 99.99 % turbidity removal, and considerable removal rates for Chemical Oxygen Demand (COD) and Total Organic Carbon (TOC). Nevertheless, wetting remained a significant issue, as evidenced by the persistence of commonly used volatile organic contaminants and surfactants in the textile industry detected within the permeate. The findings in this case study reinforce that DCMD holds promise for textile wastewater treatment but emphasize the necessity of pretreatment and wetting mitigation strategies to fully unlock its potential. This research offers crucial insights for future MD applications in addressing the complexities of textile wastewater treatment. © 2025 The Authors

关键词： Direct contact membrane distillation (DCMD) Industrial wastewater reuse Membrane wetting Optical coherence tomography (OCT) Pretreatment strategies Textile wastewater treatment Volatile organic contaminants

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Performance evaluation of Active Chilled Beam under cooling operation in real office conditions in a high-performance building 10

Performance evaluation of Active Chilled Beam under cooling ...

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10th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in buildings, IAQVEC 2019

作者： Upadhyay, Rohit Mora, Rodrigo Intermediate Building Performance Analyst Integral Group VancouverBC Canada Faculty Building Science Graduate Program British Columbia Institute of Technology VancouverBC Canada

This study investigates the operation of Active Chilled Beam under cooling operation in single occupant office in a high-performance LEED Gold building at the British Columbia Institute of technology in Vancouver. The thermo-fluid phenomena of room air were studied inside a few offices under cooling operation in stable room temperature conditions. Active Chilled Beams were found performing effectively in cooling mode operation. Surface temperature distribution and the air temperature distribution in the occupied zone were found uniform at all heights and close to the room setpoint. The air velocities were within the recommended air velocity set by ASHRAE Standard for thermal comfort except at the colliding jet between two beams in some offices. The operative temperature measured near the occupant was found close to the room setpoint. The supply air velocity and supply air temperature at both the slots of the beam were found different. It was concluded that the difference in supply air velocity could be due to the uneven pressure distribution in the primary air plenum owing to the connection method of the duct to the primary plenum and the difference in temperature could be due to the circuit arrangement of heat exchanger inside the Active Chilled Beam, which needs further research and investigation of the beam characteristics in a controlled environment. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Cooling

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Guidelines to bridge the gap between adaptive thermal comfort theory and building design and operation practice

Guidelines to bridge the gap between adaptive thermal comfor...

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11th Windsor Conference on Thermal Comfort: Resilient Comfort, WINDSOR 2020

作者： Hellwig, Runa T. Teli, Despoina Schweiker, Marcel Choi, Joon-Ho Jeffrey Lee, M.C. Mora, Rodrigo Rawal, Rajan Wang, Zhaojun Al-Atrash, Farah Aalborg University Department of Architecture Design and Media Technology CREATE Aalborg Denmark Chalmers University of Technology Department of Architecture and Civil Engineering Gothenburg Sweden Karlsruhe Institute of Technology Building Science Group Karlsruhe Germany University of Southern California School of Architecture Los Angeles United States National Taichung University of Science and Technology Department of Interior Design Taichung Taiwan British Columbia Institute of Technology Building Science Graduate Program Vancouver Canada CEPT University Centre for Advanced Studies in Building Science and Energy Ahmedabad India Harbin Institute of Technology School of Architecture Harbin China German Jordanian University School of Architecture and Built Environment Amman Jordan

ISBN: (纸本)9781916187634

Adaptive thermal comfort guidelines have been developed within the work of Annex 69: "Strategy and practice of adaptive thermal comfort in low energy buildings". The guidelines have been established based on a framework for adopting adaptive thermal comfort principles in building design and operation developed by the authors. The guidelines target building practitioners, addressing the critical interrelated role building planners, building operators and occupants play. A successful adaptive thermal comfort design, in which design for human thermal adaptation is foreseen, planned, and carefully embedded in the design and operation intent, is based on broad knowledge and understanding of the multiple quantifiable and non-quantifiable factors influencing human perception, as well as human building interaction. Adaptive building design follows a user-centric integrated design approach and therefore it is critical to consider the occupants' and the operators' role in buildings already in the design phase. This paper focuses on three main challenges identified earlier and how these are addressed in the guidelines, i.e. i) updating prevailing knowledge about human thermophysiology and adaptation, ii) developing a procedure for design of adaptive opportunities, and iii) providing guidance for operational planning and operation of adaptive buildings. The challenge for future research remains to assess the magnitude of how specific design decisions affect particular adaptive mechanisms. © 2020 11th Windsor Conference: Resilient Comfort, WINDSOR 2020 - Proceedings. All rights reserved.

关键词： Energy efficiency

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COVID-19 Infected Lung Computed Tomography Segmentation and Supervised Classification Approach

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Computers, Materials & Continua 2021年第7期68卷 391-407页

作者： Aqib Ali Wali Khan Mashwani Samreen Naeem Muhammad Irfan Uddin Wiyada Kumam Poom Kumam Hussam Alrabaiah Farrukh Jamal Christophe Chesneau Department of Computer Science Concordia College BahawalpurBahawalpur63100Pakistan Department of Computer Science&IT Glim Institute of Modern StudiesBahawalpur63100Pakistan Institute of Numerical Sciences Kohat University of Science&TechnologyKohat26000Pakistan Institute of Computing Kohat University of Science and TechnologyKohat26000Pakistan Program in Applied Statistics Department of Mathematics and Computer ScienceFaculty of Science and TechnologyRajamangala University of Technology ThanyaburiThanyaburi12110Thailand Departments of Mathematics Faculty of ScienceCenter of Excellence in Theoretical and Computational Science(TaCS-CoE)&KMUTT Fixed Point Research LaboratoryRoom SCL 802 Fixed Point LaboratoryScience Laboratory BuildingKing Mongkut’s University of Technology Thonburi(KMUTT)Bangkok10140Thailand Department of Medical Research China Medical University HospitalTaichung40402Taiwan College of Engineering Al Ain UniversityAl Ain64141United Arab Emirates Department of Mathematics Tafila Technical UniversityTafila66110Jordan Department of Statistics The Islamia University of BahawalpurBahawalpur63100Pakistan 11Department of MathematicsUniversitéde CaenLMNOCaen14032France

The purpose of this research is the segmentation of lungs computed tomography(CT)scan for the diagnosis of COVID-19 by using machine learning *** dataset contains data from patients who are prone to the *** contains three types of lungs CT images(Normal,Pneumonia,and COVID-19)collected from two different sources;the first one is the Radiology Department of Nishtar Hospital Multan and Civil Hospital Bahawalpur,Pakistan,and the second one is a publicly free available medical imaging database known as *** the preprocessing,a novel fuzzy c-mean automated region-growing segmentation approach is deployed to take an automated region of interest(ROIs)and acquire 52 hybrid statistical features for each ***,12 optimized statistical features are selected via the chi-square feature reduction *** the classification,five machine learning classifiers named as deep learning J4,multilayer perceptron,support vector machine,random forest,and naive Bayes are deployed to optimize the hybrid statistical features *** is observed that the deep learning J4 has promising results(sensitivity and specificity:0.987;accuracy:98.67%)among all the deployed *** a complementary study,a statistical work is devoted to the use of a new statistical model to fit the main datasets of COVID-19 collected in Pakistan.

关键词： COVID-19 machine learning fuzzy c-mean deep learning J4

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