Energy technology最新文献

{"title":"Synergistically In Situ Synthesized Bi2O3@Ti3C2 Nanocomposite Supported by Density Functional Theory Analysis for Next-Generation Lithium-Ion Batteries with High Electrochemical Performance","authors":"Tariq Bashir,&nbsp;Asif Hayat,&nbsp;Ehsan Ghasali,&nbsp;Tariq Ali,&nbsp;Atta Ur Rehman,&nbsp;Asad Ali,&nbsp;Saleem Raza,&nbsp;Yasin Orooji","doi":"10.1002/ente.202402319","DOIUrl":"https://doi.org/10.1002/ente.202402319","url":null,"abstract":"<p>The emergence of high-energy lithium-ion batteries has raised an urgent need for crucial electrode materials, particularly for anode. Nevertheless, a significant obstacle hindering the actual application of these technologies is due to the occurrence of capacity degradation during cycles and subpar rate performance. A hydrothermal approach is used to easily synthesize bismuth oxide nanocomposite (Bi₂O₃@Ti₃C₂) by establishing chemical bonding. Single-crystal bismuth oxide (Bi₂O₃) nanoparticles, averaging 80 nm in size, are evenly distributed at Ti₃C₂ nanosheets surface. In comparison to agglomerated pristine Bi₂O₃ nanoparticles, the composite nanostructure enhances porosity and electrical conductivity of the composite anode material. The electrochemical efficiency of the Bi₂O₃@Ti₃C₂ nanocomposite material is remarkable, as evidenced by its initial cycling capacity of 704 mAh g⁻¹ at 200 mA g⁻¹ current density and a capacity retention of 598 mAh g⁻¹ over 100 charge/discharge cycles. The high electrical conductivity of Ti₃C₂ MXene nanosheets significantly improves the overall electrochemical properties of the Bi₂O₃@Ti₃C₂ nanocomposite material. Density functional theory (DFT) calculations and X-ray photoelectron spectroscopy (XPS) measurements have further confirmed that charge transfer to active Bi₂O₃ nanoparticles is efficiently promoted within such composite material during lithiation/delithiation processes. The nanocomposite of Bi₂O₃@Ti₃C₂ exhibits significant potential for electrochemical energy storage applications.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 9","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ente.202402319","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145111313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Maximum Power Point Tracking Using a Multimode Hunter-Prey Optimization Algorithm for Gradually Varying Power in Centralized Thermoelectric Generation System","authors":"Wenchao Zhu,&nbsp;Peng Li,&nbsp;Wenlong Yang,&nbsp;Changjun Xie,&nbsp;Hao Li,&nbsp;Yang Yang","doi":"10.1002/ente.202402070","DOIUrl":"https://doi.org/10.1002/ente.202402070","url":null,"abstract":"<p>The unstructured power outputs from thermoelectric generator (TEG) systems have precipitated the advancement of maximum power point tracking (MPPT) methods toward more intelligent solutions. This article concentrates on centralized TEG systems which work during nonuniform distribution of temperature cases and introduce the hunter-prey optimization algorithm with multimode updating (MMUHPO). Existing MPPT methods based on metaheuristic algorithms pay attention to improving tracking speed, efficiency, oscillation, and call frequency. However, in scenarios marked by gradual changes in power characteristics, the precision of MPPT algorithms can lead to frequent oscillatory searches and elevated computational demands. MMUHPO reduces power loss and simplifies algorithm complexity by improving the original mechanism and introducing termination mechanism and multimode update mechanism. Herein, the proposed algorithm is compared with several widely used MPPT algorithms based on metaheuristic algorithms under five different operating conditions. Remarkably, the MMUHPO algorithm demonstrates a substantial enhancement in energy collection efficiency, with the increase in efficiency reaching up to 109.8%. Finally, real-time data simulation experiments corroborate the exceptional tracking performance of the proposed algorithm.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 10","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145224445","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}

{"title":"Developing Hybrid TiO2–Multiwalled Carbon Nanotubes Photoanodes for Dye-Sensitized Solar Cells","authors":"Yusuf Yıldız,&nbsp;Kemal Bilen,&nbsp;Abdullah Atılgan","doi":"10.1002/ente.202401946","DOIUrl":"https://doi.org/10.1002/ente.202401946","url":null,"abstract":"<p>Dye-sensitized solar cells (DSSCs) are one of the prominent research fields of solar energy that have been recently studied by scientists among different disciplines. One of the manners for the production of effective DSSCs is greatly dependent on improving the properties of the TiO₂ structure. Resistance against diffusion of photoexcited charge carriers through interconnected TiO₂ nanoparticles is one of the main obstacles for achieving greater efficiency. Charge transfer resistances that originate from imperfections and surface trap states between TiO₂ nanoparticles deteriorate the electron transport process. This study addresses the issues of charge transfer resistance and trap states, hindering the performance parameters of a solar cell. To mitigate these problems, the TiO₂ paste including TiCl₃ blocking layer and TiCl₄ post-treatment is incorporated with multiwalled carbon nanotubes (MWCNTs). Herein, different amounts of MWCNTs (0, 0.025, 0.05, 0.1, 0.15, and 0.2 wt%) are added into TiO₂ pastes. The impact of the changing weight ratios of MWCNTs on the DSSC performance parameters was investigated. When compared with the undoped sample (0 wt%), it has seen that <i>J</i>_SC and power conversion efficiency (PCE) are boosted by 114% and 58.4%, correspondingly, for the sample containing 0.1 wt% of MWCNT. The results indicate that the <i>J</i>_SC and PCE of the DSSC with an ideal amount of MWCNT can be upgraded to 22.63 mA cm⁻² and 7.21%, respectively.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 7","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144598733","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}

{"title":"Self-Powered Fire Safety Indicator Based on Fabric-Based Triboelectric Nanogenerator","authors":"Sugato Hajra,&nbsp;Swati Panda,&nbsp;Kushal Ruthvik Kaja,&nbsp;Mohamed A. Belal,&nbsp;Venkateswaran Vivekananthan,&nbsp;Hoe Joon Kim","doi":"10.1002/ente.202402488","DOIUrl":"https://doi.org/10.1002/ente.202402488","url":null,"abstract":"<p>Fire-retardant materials-based triboelectric nanogenerators (F-TENG) are gaining significant interest for their dual roles in energy harvesting and self-powered sensing, especially suited for areas with limited electricity access or during fire emergencies. Despite this, there has been limited exploration of F-TENGs, such as the availability of new fire retardant materials and fire-related scenarios, where multifunctional and adaptable devices are increasingly in demand. This study first introduces a flame-retardant material based on white glue and baking soda coated upon the cotton cloth and further, it is used as an effective triboelectric material in F-TENG operating in the single-electrode mode. The treated fabric is obtained by simple coating and drying techniques, which illustrates that cotton fabrics demonstrate excellent self-extinguishing properties. The F-TENG achieves a maximum peak power of 61 μW at a tapping frequency of 2 Hz. The output of TENG maintains 80% of its original electrical voltage output (60–47 V) after burning 6 times. The F-TENG is subsequently utilized to create a self-powered sensor for fire indication, enhancing fire rescue and evacuation efforts. This invention expands the application of self-powered technology for preventing building fires, which could lead to the creation of urban ecosystems and improvements in smart structures.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 10","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145224268","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}

{"title":"Improvement of Numerical Simulation for Melting of the Composite Phase-Change Material Based on the Comparison with Experiment","authors":"Lina Zhao,&nbsp;Baoming Chen,&nbsp;Xiangyu Li,&nbsp;Huilin Wang,&nbsp;Qiangmin Li","doi":"10.1002/ente.202402339","DOIUrl":"https://doi.org/10.1002/ente.202402339","url":null,"abstract":"<p>The addition of a metal skeleton significantly improves the heat storage/release rate of composite phase-change materials (PCMs), taking as a critical factor in extending their application potential. When the numerical simulation with conventional thermal equilibrium model is used for high computational efficiency, its applicability is constrained in scenarios requiring precise characterization of heat transfer. To improve the simulation accuracy, the concept of contact thermal resistance, which refers to the heat transfer resistance between two adjacent objects, is introduced to construct the local thermal nonequilibrium (LTNE) model in the article. A V-shaped nonuniform skeleton is proposed by combining several single-directional gradient units. The comparison of numerical simulation with experimental results shows that the improved LTNE model achieves higher accuracy, with optimal agreement at a contact thermal resistance of 2.5 × 10⁻⁴ m² K W⁻¹. The average relative error in total melting time with experimental data is significantly reduced from 16.67% to 2.00%, compared with the conventional thermal equilibrium model. The V-shaped nonuniform skeleton is superior to the uniform skeleton with a reduction of 29.41% in melting time. This study provides an effective way to establish an accurate model of the melting process of composite PCMs.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 10","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145224267","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}

{"title":"New Type of All-Solid-State Integrated On-Chip Planar Microsupercapacitors with Greatly Improved Comprehensive Electrochemical Performance","authors":"Qing Wu,&nbsp;Yu Gao,&nbsp;Jun-Chao Jiao,&nbsp;Jia-Hui Qiao,&nbsp;Le-Chen Liang,&nbsp;Si-Tong Liu,&nbsp;Guang-Yu Zhang","doi":"10.1002/ente.202402386","DOIUrl":"https://doi.org/10.1002/ente.202402386","url":null,"abstract":"<p>With the breakthrough development of many microelectronic products and high-precision devices, the requirements for microsupercapacitors (MSCs) are becoming increasingly stringent. The low comprehensive electrochemical performance of most existing MSCs is the main challenge hindering their practicality. In this article, in order to improve the comprehensive electrochemical performance of MSCs, H₂SO₄/poly (vinyl alcohol) (H₂SO₄/PVA) mixture is used as the gel electrolyte, graphene quantum dot electrode film of 7 nm is prepared by a modified liquid-air interface self-assembly method, the width-to-gap ratio of interdigital microelectrodes is set as 8 μm:8 μm, the interdigital microelectrodes with four subunits are exposed on the silicon substrate by photolithography, and the electrode structure with simultaneous series and parallel connections is synthesized to achieve a novel all-solid-state integrated on-chip planar MSCs. The MSCs demonstrate excellent comprehensive electrochemical performance with ultrahigh power density of 323.35 W cm⁻³, energy density of 65.83 mW h cm⁻³, superior cycling stability of 96.88% after 10 000 cycles at 50 V s⁻¹, and relaxation time constant of 43.19 μs. This study demonstrates that the new type of all-solid-state integrated on-chip planar MSCs will play a key role in promoting the development of miniature power supplies in intelligent microsystems.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 10","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145224310","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}

{"title":"Rational Design and Theoretical Investigation of Quinoxaline-Based Small-Molecule Functional Materials for High-Performance Organic Solar Cells","authors":"Ume Salma,&nbsp;Rabia Shakeel,&nbsp;Raheela Sharafat,&nbsp;Shaimaa A. M. Abdelmohsen,&nbsp;Haifa A. Alyousef,&nbsp;Javed Iqbal","doi":"10.1002/ente.202402217","DOIUrl":"https://doi.org/10.1002/ente.202402217","url":null,"abstract":"<p>Small organic molecules with promising optoelectronic properties have been widely adopted in organic solar cells (OSCs) due to their straightforward synthesis, purification, and well-defined structures. In this work, five quinoxaline-based small molecules (TQA1–TQA5) are designed and theoretically investigated as potential donors in OSCs. Density functional theory (DFT) and time-dependent DFT are employed at the MPW1PW91/6-31G (d,p) level to evaluate their electronic, optical, and photovoltaic properties. The results indicate that each TQA derivative exhibits deeper highest occupied molecular orbital levels and a reduced energy gap, with strong absorption in the visible region. Furthermore, the calculated frontier orbitals suggest pronounced intramolecular charge transfer from the donor (triphenylamine) segment to the quinoxaline–acceptor moieties, enhancing exciton dissociation. The estimated open-circuit voltage (<i>V</i>_oc) values calculated against [6,6]-Phenyl-C₆₁-butyric acid methyl ester (PC₆₁ BM) coupled cluster with single and double excitations range from 0.82 to 1.03 V, surpassing that of the reference molecule TQ2R (0.66 V). These theoretical findings highlight the potential of TQA1–TQA5 as high-performance donor materials for future OSC applications.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 10","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145224316","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}

{"title":"Geometry-Dependent Dynamic Impact Behavior of Lithium–Iron Phosphate Batteries at Different Velocities: An Experimental and Numerical Approach","authors":"Vishesh Shukla,&nbsp;Ashutosh Mishra,&nbsp;Anil Kumar,&nbsp;Ravi Prakash Tewari","doi":"10.1002/ente.202402197","DOIUrl":"https://doi.org/10.1002/ente.202402197","url":null,"abstract":"<p>The present work reports the drop weight impact tests with 18650 lithium–iron phosphate batteries (LFPB) at different impact velocities (1.04, 1.26, 1.36, and 1.69 m s⁻¹) at 0% and 50% state of charge (SOC). The investigation is extended for other battery geometry namely, 22650, 26650, and 32650. The thermal runaway triggering point is characterized by the event of internal short-circuit (ISC) resulting in voltage drop. The voltage drop phenomenon is ruled out to be present in the case of the tests at SOC 0%, while it is noticed for velocities 1.26 m s⁻¹ and above at SOC 50%. For SOC 50%, the voltage-time curve exhibits 87.5% and 21.2% drop corresponding to the highest and lowest impact velocity respectively. Further, the dynamic impact behavior is numerically simulated. The findings shows that the ultimate stress observed is maximum (0.53 MPa) for 32650 while it is minimum (0.47 MPa) for 22650 corresponding to SOC 0%. On the other hand, the ultimate stress is found to be maximum (0.68 MPa) for 22650 and minimum (0.47 MPa) for 26650. The outperformance of LFPB 26650 is observed in terms of its dynamic impact behavior.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 10","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145224315","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}

{"title":"Comparative Analysis of Graded-Index and Quarter-Wave One-Dimensional Photonic Crystal Filters for GaSb Thermophotovoltaic Cells","authors":"Mehran Sepah Mansoor,&nbsp;Nima Talebzadeh,&nbsp;Paul G. O’Brien","doi":"10.1002/ente.202402273","DOIUrl":"https://doi.org/10.1002/ente.202402273","url":null,"abstract":"<p>Thermophotovoltaic (TPV) systems are important for the clean energy transition due to their applications in waste heat recovery, solar energy harvesting, and thermal energy grid storage. This study presents a comprehensive investigation of the performance of TPV systems equipped with one-dimensional photonic crystal filters. The optical characteristics of the filter comprised of porous SiO₂ nanoparticle and dense ZrO₂ films are numerically evaluated. The results demonstrate the choice of filter significantly influences the emitter temperature, power density, system efficiency, and spectral performance. Further, the analysis underscores the inherent tradeoff in designing optical filters between achieving elevated in-band transmittance and maximizing out-of-band reflectance. Under a constant flux of 60 W cm⁻² from a heat source a conventional double-stack quarter-wave optical filter achieves a TPV system efficiency of 28.9%. In contrast, an optimized filter structure, consisting of a double-stack modified quarter-wave optical filter, increases TPV system efficiency to 29.1%. Introducing the optimized filter with a graded index profile into the TPV system as a photon recycling tool results in a 27% TPV system efficiency. This is a significant improvement compared to the case without a filter, which has a system efficiency of 15.8%.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 9","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ente.202402273","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145111260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Peeling-Off Process for the Fabrication of Flexible, Lightweight Bifacial Perovskite/Cu(In,Ga)Se2 Tandem Solar Cells","authors":"Takahito Nishimura,&nbsp;Chihiro Mizushima,&nbsp;Ryousuke Ishikawa","doi":"10.1002/ente.202500020","DOIUrl":"https://doi.org/10.1002/ente.202500020","url":null,"abstract":"<p>In this study, a peeling-off technique is developed for fabricating flexible, lightweight, and bifacial perovskite/Cu(In,Ga)Se₂ (CIGSe) tandem solar cells (TSCs). The process involves forming a perovskite/CIGSe TSC on a glass substrate and then peeling it off. The effectiveness of the proposed process is investigated using a CIGSe single-junction solar cell. A MoSe₂ atomic layer with a <i>c</i>-axis orientation is observed at the Mo/CIGSe interface, which promotes the peeling-off process. A flexible, lightweight CIGSe solar cell with a power conversion efficiency (PCE) of 12.3% is fabricated using the peeling-off technique. The open-circuit voltage of the flexible solar cell is similar to that of the rigid CIGSe solar cell. Furthermore, a perovskite/CIGSe TSC is fabricated with a PCE of 21.4% on a glass substrate. The TSC exhibited excellent current matching owing to the good match between the energy bandgaps of the perovskite and CIGSe. The proposed technique is used to detach the TSC from the substrate, and NiO and In₂O₃ transparent back layers are deposited on the peeled CIGSe rear surface. The device exhibits rectification and a PCE of 2.9%. Scanning electron microscopy reveals that the SnO₂/C60 and/or C60/perovskite interfaces are peeled off. These results demonstrate that high-efficiency, flexible, lightweight, and bifacial perovskite/CIGSe TSCs can be fabricated using the proposed technique by controlling adhesion at the device interfaces.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 9","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ente.202500020","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145111259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}