Energy technology最新文献

Simulation and Experimental Research on a New Symmetrical Hydraulic Piezoelectric Energy Harvester 新型对称液压压电能量收集器的仿真与实验研究

IF 3.8 4区工程技术

Energy technology Pub Date : 2024-09-19 DOI: 10.1002/ente.202400867

Wenjie Zhang, Yang Shang, Hongyu Jiang, Fanxin Meng, Haixia Zhao, Weijie Shi

{"title":"Simulation and Experimental Research on a New Symmetrical Hydraulic Piezoelectric Energy Harvester","authors":"Wenjie Zhang, Yang Shang, Hongyu Jiang, Fanxin Meng, Haixia Zhao, Weijie Shi","doi":"10.1002/ente.202400867","DOIUrl":"https://doi.org/10.1002/ente.202400867","url":null,"abstract":"This study introduces a new symmetrical hydraulic piezoelectric energy harvester. By integrating theoretical analysis, simulation, and empirical testing, the research delves into the energy‐harvesting potential of monolithic single‐side output, monolithic two‐side parallel‐connected output, stacked one‐side parallel‐connected output, and stacked two‐side parallel‐connected output under varying parameter configurations. Additionally, it elucidates the energy dissipation occurring during the energy‐harvesting process of stacked piezoelectric disks. It has been observed that the primary determinant of voltage is the amplitude of pulsation, not the static pressure. Concurrently, the study also addresses the consistency of power generation between multiple channels. A study is made on whether there is a proportional relationship between single‐channel power generation and multi‐channel power generation. The root mean square (RMS) voltage of each connection sharply rises with resistance from 2 to 100 KΩ. It is found that the performance of parallel connection of monolithic piezoelectric disk is better than that of other connection methods. At 3 MPa and 100 Hz, the optimal resistance is 16 KΩ, yielding a maximum average power of 1155.63 μW and an optimal power density of 1.774 μW (bar mm3)−1. Consequently, the research offers a novel approach to addressing the issue of sustainable energy supply for low‐power electronic devices and sensors.","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142266469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Novel Self‐Reconfigurable Battery Pack Design with and without Active Cell Balancing 带主动电池平衡和不带主动电池平衡的新型可自重构电池组设计

IF 3.8 4区工程技术

Energy technology Pub Date : 2024-09-18 DOI: 10.1002/ente.202401055

Anirudha Bajaj, Wei Li, Maokun Xiong, Jianhui Mou, Akhil Garg, Liang Gao, Bibaswan Bose

引用次数: 0

Theoretical Investigation on Carbazole Derivatives as Charge Carriers for Perovskite Solar Cell 咔唑衍生物作为包晶太阳能电池电荷载体的理论研究

IF 3.8 4区工程技术

Energy technology Pub Date : 2024-09-18 DOI: 10.1002/ente.202400918

Samrudhi B. M., Abdennacer Idrissi, Said Bouzakraoui, Manoj V. Mane, Deepak Devadiga, Ahipa T. N.

{"title":"Theoretical Investigation on Carbazole Derivatives as Charge Carriers for Perovskite Solar Cell","authors":"Samrudhi B. M., Abdennacer Idrissi, Said Bouzakraoui, Manoj V. Mane, Deepak Devadiga, Ahipa T. N.","doi":"10.1002/ente.202400918","DOIUrl":"https://doi.org/10.1002/ente.202400918","url":null,"abstract":"The study explores carbazole‐based organic molecules as transport layers in durable perovskite solar cells, focusing on their optoelectronic and charge transfer properties. Thirteen carbazole derivatives are systematically analyzed via density functional theory (DFT) calculations to understand their structure and optoelectronic characteristics. Substituents like bromo, phenyl, thiophenyl, and pyridyl at positions 3,6‐ and 2,7‐ of carbazole were studied. Phenyl and thiophenyl substitutions lowered highest occupied molecular orbital (HOMO) energy levels, while bromo and pyridyl increased them, tuning HOMO energies from −5.45 to −6.03 eV. These energies align well with perovskite materials valence bands, with absorbance primarily below 400 nm, complementing perovskite absorption. The compounds showed high light‐harvesting efficiencies (LHEs) (0.22 to 0.94) and improved radiative lifetimes. Theoretical investigations identified most compounds as effective p‐type hole‐transport materials (HTM), except 3,6‐ and 2,7‐dithiophenyl carbazoles, which exhibited n‐type behavior due to low hole reorganization energies. Overall, the study highlights computational design's role in developing carbazole derivatives as promising charge carrier precursors for perovskite solar cells.","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142266470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultrasmall Fe‐Nanoclusters‐Anchored Carbon Polyhedrons Interconnected with Carbon Nanotubes for High‐Performance Zinc‐Air Batteries 与碳纳米管互连的超小型铁纳米团簇碳多面体用于高性能锌-空气电池

IF 3.8 4区工程技术

Energy technology Pub Date : 2024-09-18 DOI: 10.1002/ente.202401339

Haihua Wu, Feng Wu, Juanjuan Zhai, Yudan Li, Xin Xu, Yunfang Gao

{"title":"Ultrasmall Fe‐Nanoclusters‐Anchored Carbon Polyhedrons Interconnected with Carbon Nanotubes for High‐Performance Zinc‐Air Batteries","authors":"Haihua Wu, Feng Wu, Juanjuan Zhai, Yudan Li, Xin Xu, Yunfang Gao","doi":"10.1002/ente.202401339","DOIUrl":"https://doi.org/10.1002/ente.202401339","url":null,"abstract":"The catalytic activity of metal catalyst is closely related to its particle size. Yet, the size effect in electrocatalytic oxygen reduction reaction (ORR), an important reaction for metal‐air batteries and fuel cells, has not been clearly studied. Herein, a two‐step anchoring method is utilized to control the Fe catalyst in forms of nanoparticles (NPs), ultrasmall nanoclusters (NCTs), and isolated atoms as well as stabilized and dispersed by carbon polyhedrons interconnected with carbon nanotubes (CNTs). The uniformly distributed Fe NCTs displays superior ORR performance compared with Fe NPs, isolated Fe atoms, and commercial Pt/C. The brilliant ORR activity of Fe NCTs is a result of its unique electron structure and abundant edge and corner active sites. Due to the porous structure of carbon polyhedrons and high electron conductivity of CNTs, Fe NCTs also delivers an excellent discharge performance in zinc‐air battery with a peak power density of 213.3 mW cm−2 and long‐term stability. In these findings, a new strategy for the design of metal NCTs catalysts applied in various catalytic reactions is opened up.","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142266471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

State of Health Estimation of Lithium‐Ion Batteries Based on Differential Thermal Voltammetry and Improved Gray Wolf Optimizer Optimizing Gaussian Process Regression 基于差热伏安法和优化高斯过程回归的改进型灰狼优化器的锂离子电池健康状况评估

IF 3.8 4区工程技术

Energy technology Pub Date : 2024-09-17 DOI: 10.1002/ente.202400996

Peng Xu, Wenwen Ran, Yuan Huang, Yongtai Xiang, Yuhong Liu, Kelin Xiao, Chaolin Xu, Shibin Wan

{"title":"State of Health Estimation of Lithium‐Ion Batteries Based on Differential Thermal Voltammetry and Improved Gray Wolf Optimizer Optimizing Gaussian Process Regression","authors":"Peng Xu, Wenwen Ran, Yuan Huang, Yongtai Xiang, Yuhong Liu, Kelin Xiao, Chaolin Xu, Shibin Wan","doi":"10.1002/ente.202400996","DOIUrl":"https://doi.org/10.1002/ente.202400996","url":null,"abstract":"Accurate estimation of the state of health (SOH) of lithium‐ion batteries (LIBs) is essential for their safe operation. Therefore, herein, a novel approach that combines Gaussian process regression (GPR) optimized using an improved gray wolf optimizer (IGWO) with differential thermal voltammetry (DTV) is introduced. In this approach, the peak and valley information of the DTV curves are used to reveal the battery‐aging mechanisms, with the slopes and durations between peaks and valleys used as health characteristics. The correlation between the characteristics and SOH of the battery is analyzed to build a health feature dataset. IGWO optimizes the GPR hyperparameters to address their dependence on the initial values and susceptibility to local optimization and employs a dimension‐learning strategy to enhance the population diversity and prevent premature convergence. DTV curves and an IGWO‐GPR model for SOH estimation using four cells from the NASA LIB public aging dataset are developed and validated. The results show root mean square errors below 0.007 and mean absolute errors under 0.006 for all cells. The coefficient of determination exceeds 0.92 for three cells, with one battery exhibiting a value of 0.866. This method provides accurate and efficient SOH estimation, essential for safe battery operation.","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142266472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research Progress on Characteristics of On‐Line Hydrogen Production by Methanol Steam Reforming 甲醇蒸汽转化在线制氢特性的研究进展

IF 3.8 4区工程技术

Energy technology Pub Date : 2024-09-17 DOI: 10.1002/ente.202400987

Bin Chen, Zonghua Wang

引用次数: 0

Nitrogen and Oxygen Dual‐Doped Carbon as High‐Rate Long‐Cycle‐Life Anode Materials for Lithium‐Ion Batteries 氮氧双掺杂碳作为高倍率、长循环寿命的锂离子电池负极材料

IF 3.8 4区工程技术

Energy technology Pub Date : 2024-09-14 DOI: 10.1002/ente.202401211

Yuxiu Li, Yanjun Cai, Qianying Jiang, Yanshan Wu, Qiwei Wu, Yue Zhang, Zhi Su

{"title":"Nitrogen and Oxygen Dual‐Doped Carbon as High‐Rate Long‐Cycle‐Life Anode Materials for Lithium‐Ion Batteries","authors":"Yuxiu Li, Yanjun Cai, Qianying Jiang, Yanshan Wu, Qiwei Wu, Yue Zhang, Zhi Su","doi":"10.1002/ente.202401211","DOIUrl":"https://doi.org/10.1002/ente.202401211","url":null,"abstract":"Defect‐type carbon, doped with nitrogen and oxygen, is synthesized using the high‐temperature solid‐phase method. X‐ray photoelectron spectroscopy analysis reveals the presence of nitrogen, including pyridine nitrogen, pyrrole nitrogen, and graphitized nitrogen, incorporated into the carbon structure. Additionally, oxygen is introduced into carbon, with both CO and CO functionalities are observed. Transmission electron microscopy and scanning electron microscopy indicate that all samples exhibit a morphology of carbon microblocks with localized turbocharged lattice regions. Electrochemical tests demonstrate that the nitrogen‐ and oxygen‐doped carbon microblocks exhibit excellent cycling performance and high rate capacity. Specifically, at current densities of 1 and 2 A g−1, the rate capacity remains at 385.6 and 214.4 mA h g−1, respectively. Furthermore, the discharge capacity at 5 A g−1 remains at 58.3 mA h g−1 on the 3500th cycle. The defects introduced by nitrogen and oxygen doping not only enhance reactivity and electronic conductivity but also improve lithium‐ion diffusion dynamics.","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142266473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nanocomposites for Lithium‐Ion Battery Anodes Made of Silicon and Polyaniline Doped with Phytic Acid 掺杂植酸的硅和聚苯胺锂离子电池阳极纳米复合材料

IF 3.8 4区工程技术

Energy technology Pub Date : 2024-09-08 DOI: 10.1002/ente.202401156

Ekaterina V. Astrova, Irina Yu Sapurina, Alesya V. Parfeneva, Galina V. Li, Alexey V. Nashchekin, Darina A. Lozhkina, Aleksander M. Rumyantsev

引用次数: 0

Organic and Inorganic Photoactive Absorbers for Wavelength‐Selective Transparent Photovoltaic Devices: Focus Review 用于波长选择性透明光伏器件的有机和无机光活性吸收剂：焦点回顾

IF 3.8 4区工程技术

Energy technology Pub Date : 2024-09-06 DOI: 10.1002/ente.202400961

Terence K. S. Wong

{"title":"Organic and Inorganic Photoactive Absorbers for Wavelength‐Selective Transparent Photovoltaic Devices: Focus Review","authors":"Terence K. S. Wong","doi":"10.1002/ente.202400961","DOIUrl":"https://doi.org/10.1002/ente.202400961","url":null,"abstract":"The present status of wavelength‐selective transparent photovoltaic (TPV) devices for green buildings and self‐powered wireless sensors is comprehensively reviewed. Photoactive absorbers for both UV and near‐infrared (NIR)‐selective TPV are discussed. UV‐selective devices based on engineered small organic molecules have demonstrated high transparency (>80%). However, their power conversion efficiency (PCE) is ≈1%. Higher PCE of 3.15% and transparency of 51.4% are obtained from the bulk heterojunction (BHJ) of a wide energy gap conjugated polymer and nonfullerene acceptor (NFA). The highest transparency of 84.6% together with device stability and scalability is realized for CsPbCl2.5Br0.5 perovskite absorbers. The few reported NIR‐selective TPV devices are all organic solar cells. Using BHJs comprising ultranarrow energy gap conjugated polymer and NFA, a PCE of 5.74% and transparency of ≈60% can be obtained. However, current IR‐selective devices are generally limited by an absorption tail that encroaches into the visible region and result in suboptimal color rendering. To address this, a new spectral range ratio (SRR) parameter is proposed to classify absorbers for IR‐selective TPV devices. A molecular design strategy to increase the SRR based on frontier molecular orbital theory is outlined.","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142195689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Smart Railway Transportation: Self‐Powered and Self‐Sensing Vibration Energy Harvester 智能轨道交通：自供电和自感应振动能量收集器

IF 3.8 4区工程技术

Energy technology Pub Date : 2024-09-06 DOI: 10.1002/ente.202401253

Ang Li, Chengliang Fan, Hongjie Tang, Zutao Zhang, Genshuo Liu, Linyang He, Jie Zhao, Jianhong Zhou, Yongli Hu

{"title":"Smart Railway Transportation: Self‐Powered and Self‐Sensing Vibration Energy Harvester","authors":"Ang Li, Chengliang Fan, Hongjie Tang, Zutao Zhang, Genshuo Liu, Linyang He, Jie Zhao, Jianhong Zhou, Yongli Hu","doi":"10.1002/ente.202401253","DOIUrl":"https://doi.org/10.1002/ente.202401253","url":null,"abstract":"Safety monitoring sensors in smart railways need a sustainable onboard power supply. This article proposes a counter‐rotating gear energy harvester (CG‐EH) to convert the longitudinal vibration energy of trains into electricity for onboard sensors.CG‐EH consists of a vibration input module, a motion conversion module, and an energy conversion module. The vibration input module converts the longitudinal displacement of the coupler into the rotational motion of the gears. The motion conversion module realizes the conversion of the reciprocating input displacement into the unidirectional rotation based on a counter‐rotating gear set, multi‐stage spur gear sets can effectively mitigate the effects of excitation on CG‐EH. The energy conversion module transforms the kinetic energy of the unidirectional rotation into electrical energy through a generator. Experimental results show that the energy outputs of CG‐EH are improved with longitudinal vibration compared with the usual onboard energy harvester. From the result, the peak output power of CG‐EH is 14.59 W, the peak efficiency reaches 39.2%, enough to power relevant onboard sensors. Moreover, CG‐EH can monitor the running status of trains based on deep learning. From the experiment results and application prospects, CG‐EH is a favorable solution for the power supply problems of onboard sensors in smart railways.","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142195688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0