Next Energy最新文献

{"title":"Three-dimensional electrochemical simulation of proton exchange membrane fuel cell with distributed resistance modeling method","authors":"Dongan Liu ,&nbsp;Tianfu Gong ,&nbsp;Chen Zhang,&nbsp;Nanping Hu,&nbsp;Ke Su","doi":"10.1016/j.nxener.2025.100403","DOIUrl":"10.1016/j.nxener.2025.100403","url":null,"abstract":"<div><div>In this study, a new modeling method is developed for analyzing the obstructive effects against the reactant gas because of the deformation of the gas diffusion layer (GDL), which is the interaction between the serpent flow field of the anode side and the straight channels with tapered structures of the cathode side due to the compression after the assembly of the proton exchange membrane fuel cell (PEMFC) stack. This method is based on the stochastic reconstruction technology to obtain the GDL porous material, and then the permeabilities of the reconstructed material through-plane can be predicted by normal computational fluid dynamics method. Coupling with the 3-dimensional GDL mechanical deformation model based on finite-element analysis, the profile for describing the distribution of the nonuniform permeabilities in GDL is produced, which particularly focuses on the regions under the ridges between anode and cathode bipolar plates. This distributed resistance map can be used as valuable inputs of physical properties to the electrochemical simulation. Hence, the details of the mass transportation between the gas flow channels and catalyst layer can be captured and analyzed. The simulation results show the deformation of the GDL has significant effects on the gas flow mass transportation and thereby the electrochemical performance. Meanwhile, with the new modeling method, the simulation results are getting more closer to the measurements in all operating current densities. Compared with the conventional method, the accuracy of the simulation is increased. Additionally, it can be observed that the generated water is taking main effect as obstacles to the reactant gas in the higher operating current density, which is playing a more leading role than the resistance of the porous media itself.</div></div>","PeriodicalId":100957,"journal":{"name":"Next Energy","volume":"9 ","pages":"Article 100403"},"PeriodicalIF":0.0,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144912909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multimodal synchronous monitoring platform for state of charge stratified thermal runaway in lithium iron phosphate batteries","authors":"Longfei Han ,&nbsp;Mengdan Zhang ,&nbsp;Xiangming Hu ,&nbsp;Xinyue Yang ,&nbsp;Jinfeng Li ,&nbsp;Xiaoxuan Wei ,&nbsp;Guoyu Han ,&nbsp;Lihua Jiang ,&nbsp;Yurui Deng ,&nbsp;Yuan Cheng","doi":"10.1016/j.nxener.2025.100398","DOIUrl":"10.1016/j.nxener.2025.100398","url":null,"abstract":"<div><div>As a critical component in electric vehicles and energy storage systems, the dynamic relationship between state of charge (SOC) and thermal runaway (TR) propagation in LiFePO₄ batteries remains insufficiently understood. To address the critical limitation of existing TR testing methods in achieving synchronized multiparameter acquisition, this study developed an integrated multi-physics monitoring platform enabling spatiotemporal correlation analysis across the entire TR chain-from triggered initiation, heat/smoke release, gas speciation, 2 dimension temperature field reconstruction (infrared thermography), to TR process visualization. Systematic investigation of 18650-type LiFePO₄ cells across SOC gradients revealed distinct failure modes: 100% SOC cells exhibited predominant heat-driven failure with total heat release reaching 5.95 MJ/m² (a 5-fold increase versus 50% SOC cells), while 50% SOC cells demonstrated prioritized smoke aerosol release (520% higher particulate density than 100% SOC) with delayed combustible gas generation. This platform overcomes single-parameter detection constraints in conventional methods, providing multiscale experimental evidence to guide SOC-stratified safety protocols and phase-change thermal barrier material optimization for lithium-ion battery systems.</div></div>","PeriodicalId":100957,"journal":{"name":"Next Energy","volume":"9 ","pages":"Article 100398"},"PeriodicalIF":0.0,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144913034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wastewater as a resource: Evaluating light dependent and light independent methods, challenges, and future directions for sustainable hydrogen generation","authors":"Sampad Sarkar ,&nbsp;Sk. Aakash Hossain ,&nbsp;Subhasis Ghosh ,&nbsp;Sandipan Bhattacharya ,&nbsp;Sayan Mukherjee ,&nbsp;Debangana Bhattacharya ,&nbsp;Poushali Chakraborty ,&nbsp;Papita Das","doi":"10.1016/j.nxener.2025.100406","DOIUrl":"10.1016/j.nxener.2025.100406","url":null,"abstract":"<div><div>The increasing need for environmentally friendly energy sources has contributed to the development of innovative technologies that also resolve environmental issues. Hydrogen can be produced in a number of ways, including using fossil fuels, biomass, and renewable energy sources like wind and sun. Using renewable energy for water-based production is the most sustainable method of producing hydrogen. However, since fresh water is scarce, the main way to address this issue is to use wastewater. Although wastewater is frequently seen as an issue it could additionally be seen as a valuable source of energy as it has the potential to produce bio-hydrogen. The current review emphasizes the key conclusion of studies examining the viability of the generation of hydrogen from wastewater by applying a variety of technologies in order to investigate each method’s potential, which effectively removes pollutants from wastewater addressing both environmental challenges of wastewater treatment as well as clean energy production. Hydrogen production from wastewater using sustainable, low-energy methods enhances energy recovery in treatment plants and promotes a circular economy. This low-carbon hydrogen supports global decarbonization, and simultaneously achieving pollutant degradation with advanced systems offers dual benefits over traditional wastewater treatment methods. The essential details of 7 emerging technologies, their working mechanisms, affecting parameters, work advances, advantages and disadvantages, and their future prospects are taken into consideration in 2 distinct classes- light-independent and light-dependent technologies.</div></div>","PeriodicalId":100957,"journal":{"name":"Next Energy","volume":"9 ","pages":"Article 100406"},"PeriodicalIF":0.0,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144902118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surface modification for prolonging the lifetime of triboelectric nanogenerators enhanced by corona discharge","authors":"Qingyang Zhou,&nbsp;Rintarou Nagasawa,&nbsp;Takashi Ikuno","doi":"10.1016/j.nxener.2025.100400","DOIUrl":"10.1016/j.nxener.2025.100400","url":null,"abstract":"<div><div>Triboelectric nanogenerators (TENGs) have emerged as promising energy harvesting devices due to their low cost, flexible design, and ability to convert low-frequency mechanical energy into electricity. However, their practical application remains limited by low surface charge density and poor long-term stability. To address the former, corona discharge treatment has been widely employed to inject high-energy negative charges into polymer surfaces, significantly enhancing initial output voltage. Nevertheless, the effectiveness of corona discharge is short-lived, as the injected charges dissipate rapidly due to recombination with atmospheric positive ions and chemical degradation induced by oxygen and moisture. This temporal degradation directly causes a decline in output voltage over time, severely limiting long-term viability of TENG.</div><div>To address the issue of dissipation of corona-injected charges, which leads to a gradual decline in output performance, we introduce a surface encapsulation strategy. In this approach, a thin polydimethylsiloxane (PDMS) overlayer is applied to the corona-treated films to suppress charge recombination and surface degradation. This overlayer functions as a physical barrier, effectively suppressing both electrostatic recombination and chemical decay. Experimental results confirm that this approach greatly improves charge retention in both pure PDMS and TiO₂/PDMS composite films. Specifically, voltage retention increased from around 25 to 85% in coated pure PDMS films after 60 days. In TiO₂ composites with inherently higher charge densities, retention remained as high as 72.6%.</div><div>This study demonstrates that the synergistic combination of corona discharge and PDMS coating offers a robust strategy to achieve both high initial performance and long-term operational stability, paving the way for durable and efficient TENG devices in real-world energy harvesting applications.</div></div>","PeriodicalId":100957,"journal":{"name":"Next Energy","volume":"9 ","pages":"Article 100400"},"PeriodicalIF":0.0,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144902142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance and Emission Analysis of Hydrogen and Conventional Fuels in PFI SI Engines Using CONVERGE 3.0","authors":"Rashedul Islam ,&nbsp;S.M. Asiqur Rahman ,&nbsp;Md. Rajin Islam ,&nbsp;Md. Rakibul Islam ,&nbsp;Md. Rasel Ahmed ,&nbsp;Md. Rabiul Islam Sarker","doi":"10.1016/j.nxener.2025.100404","DOIUrl":"10.1016/j.nxener.2025.100404","url":null,"abstract":"<div><div>The availability of conventional fuels, such as gasoline and methane, which are used in spark-ignition (SI) engines, is increasingly limited by the finite nature of fossil fuel reserves. The inefficiencies in combustion are associated with reduced engine effectiveness, as incomplete combustion heightens the emissions of harmful pollutants, including CO₂ and CO, while also negatively impacting fuel economy. The objective of this research is to undertake a comparative study of engine performance and emissions for a selection of conventional fuels and hydrogen, while considering varying equivalence ratios and operational speeds. To accomplish this, an extensive 3-dimensional numerical simulation was carried out using CONVERGE 3.0 simulation software to model a port-fueled SI engine, with the SI8 Engine Premix SAGE model facilitating the simulations. The performance metrics assessed in this research include cylinder pressure, specific heat ratio, heat rate, thermal efficiency, and mean temperature. The emission characteristics are analyzed in cases of NO_x, CO, CO₂, and HC emissions. The simulation results are obtained by varying the equivalence ratios of hydrogen (0.4, 0.6, and 0.9) at different engine speeds (2000, 2500, and 3000 rpm). The engine setup, mesh creation, boundary conditions, turbulence, combustion, and species transport models were meticulously outlined to ensure accurate simulation results. Hydrogen fuel, when operated at an equivalence ratio of 0.4 and an engine speed of 3000 rpm, showcases the best overall performance among all tested conditions. It achieves the highest thermal efficiency of 40.94%, optimal cylinder pressure and specific heat ratio, a favorable mean temperature, and the lowest fuel consumption. Additionally, this configuration results in zero emissions of CO and HC, along with a significant reduction in CO₂ emissions due to the absence of carbon in the fuel structure. However, due to the high combustion temperatures associated with hydrogen, NO_x emissions remained present and require further mitigation strategies.</div></div>","PeriodicalId":100957,"journal":{"name":"Next Energy","volume":"9 ","pages":"Article 100404"},"PeriodicalIF":0.0,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144903553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Energy-efficient smart gateway framework with QoS-aware resource allocation in IoT ecosystem","authors":"Gunjan Beniwal ,&nbsp;Anita Singhrova","doi":"10.1016/j.nxener.2025.100413","DOIUrl":"10.1016/j.nxener.2025.100413","url":null,"abstract":"<div><div>Energy-efficient smart gateways are the heart of an IoT ecosystem, as they are essential for efficiently handling incoming data and resources. Due to the exponential increase in IoT devices and applications, a vast amount of data is collected from the surrounding environment. This data needs to be processed and analyzed for further executions. Smart gateways play a crucial role in catering to user needs while handling vast amounts of data, and consuming less energy. Therefore, a smart gateway framework is proposed in this work to make dynamic decisions based on the user requirements while providing the best quality of service with efficient energy consumption. The proposed gateway framework is capable of handling urgent tasks that are latency-sensitive and also optimally allocating resources based on their computational needs in a fog-cloud environment. The incoming user-generated tasks are efficiently scheduled using the proposed Dynamic Priority-Multilevel Feed Back Queue Algorithm (DP-MFBQ). Whereas, the Machine Learning-based Resource Allocation (MLRA) algorithm was proposed to make dynamic decisions based on past learnings of the smart gateway. The proposed framework is simulated using the Yet Another Fog Simulator (YAFS) simulation toolkit, and it outperformed the existing work when evaluated on the Quality of Service parameters, including latency, wait time, energy consumption, and throughput.</div></div>","PeriodicalId":100957,"journal":{"name":"Next Energy","volume":"9 ","pages":"Article 100413"},"PeriodicalIF":0.0,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144902119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impedance spectroscopy of multicomponent Se-Te-Sn-In chalcogenide glass ceramics","authors":"Kaushal Kumar Sarswat,&nbsp;Sachin Kumar Yadav,&nbsp;Neeraj Mehta","doi":"10.1016/j.nxener.2025.100401","DOIUrl":"10.1016/j.nxener.2025.100401","url":null,"abstract":"<div><div>The present research investigates the influence of indium incorporation (2%, 4%, and 6%) in Se_78-xTe₂₀Sn₂In_x chalcogenide glass-ceramic alloys on electrical impedance spectroscopy, complex modulus, and temperature-dependent conductivity across a broad frequency range (0.1–500 kHz) and temperature window (300–333 K). The impedance response, analyzed using equivalent circuit modeling, reveals a transition from a single to a double semicircular arc, indicating contributions from both grain and grain boundary regions. A distinct non-Debye relaxation behavior and negative temperature coefficient of resistance (NTCR) are observed, highlighting thermally activated charge transport. The activation energy derived from relaxation time and AC conductivity follows Arrhenius trends, while the Meyer-Neldel rule confirms entropy-assisted hopping conduction. The shortest relaxation time (∼10⁻¹¹ s) and moderate activation energies (0.26–0.34 eV) suggest excellent dielectric responsiveness and rapid polarization, favorable for energy storage and conversion devices. These results underscore the potential of indium-doped Se-Te-Sn glasses as functional layers in next-generation thermoelectric modules, supercapacitors, and solid-state ionic conductors for energy applications.</div></div>","PeriodicalId":100957,"journal":{"name":"Next Energy","volume":"9 ","pages":"Article 100401"},"PeriodicalIF":0.0,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144902143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First-principles DFT and BoltzTraP investigation of multifunctional properties of XNiH3 (X = Li, Na, K) perovskite hydrides: Thermoelectric and hydrogen storage potential","authors":"Ayoub Koufi ,&nbsp;Younes Ziat ,&nbsp;Hamza Belkhanchi","doi":"10.1016/j.nxener.2025.100402","DOIUrl":"10.1016/j.nxener.2025.100402","url":null,"abstract":"<div><div>This work presents a comprehensive first-principles investigation of the structural, electronic, thermoelectric, and hydrogen storage properties of XNiH₃ (X = Li, Na, K) perovskite-type hydrides, using density functional theory (DFT) within the generalized gradient approximation (GGA), coupled with the WIEN2k and BoltzTraP codes. The novelty of this study lies in the dual exploration of the thermoelectric and hydrogen storage functionalities of these unexplored materials, which have not yet been synthesized experimentally. Structural optimization confirms stable cubic perovskite configurations (Pm-3m), with lattice parameters increasing from Li to K. Electronic band structure and density of states analyses reveal metallic behavior across all compounds, which is favorable for both charge transport and hydrogen desorption kinetics. Thermoelectric calculations in the 300–900 K range show n-type conduction with negative Seebeck coefficients, and a maximum ZT of 0.09 for LiNiH₃ at 800 K, outperforming several known oxide and halide perovskites. Additionally, the calculated gravimetric hydrogen storage capacities are 4.37% (LiNiH₃), 3.54% (NaNiH₃), and 2.98% (KNiH₃), confirming the lightweight character and storage potential of these hydrides. These results highlight the multifunctional potential of XNiH₃ compounds for integrated energy applications, particularly in systems combining waste heat recovery and reversible hydrogen storage. Theoretical insights provided here can serve as a foundation for future experimental validation and material design.</div></div>","PeriodicalId":100957,"journal":{"name":"Next Energy","volume":"9 ","pages":"Article 100402"},"PeriodicalIF":0.0,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144890080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards enhanced durability: A review of fuel cell electric vehicle development","authors":"Chuanxu Luo,&nbsp;Hui Leng Choo,&nbsp;Hafisoh Ahmad,&nbsp;Praveena Nair Sivasankaran","doi":"10.1016/j.nxener.2025.100399","DOIUrl":"10.1016/j.nxener.2025.100399","url":null,"abstract":"<div><div>Fuel cell electric vehicles (FCEVs) provide a viable answer to transportation issues caused by fossil fuel limitations and environmental concerns. This review presents a thorough evaluation of the most recent advances in FCEV durability research. It addresses 4 major topics: component upgrades, technical control techniques, test optimization, and durability prediction. Upgrades to components include improved catalysts, bipolar plates, gas diffusion layers, proton exchange membranes, and plant balancing. Technical control solutions include power, energy, temperature, ventilation, and control management. Stress acceleration and cold start tests are examples of test optimization, whereas durability prediction requires parameter selection, real-time monitoring, dynamic modeling, and lifespan prediction. This review also makes some novel recommendations targeted at improving the endurance of FCEVs. These include measures for raising public awareness, lowering prices while increasing performance, improving subsystems for greater durability, updating health diagnostics to prevent performance deterioration, and implementing supporting regulations to encourage industry upgrading. These findings are expected to accelerate the adoption of FCEVs and the transition to a more sustainable transportation system.</div></div>","PeriodicalId":100957,"journal":{"name":"Next Energy","volume":"9 ","pages":"Article 100399"},"PeriodicalIF":0.0,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144885486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A comprehensive review of hydrogen integration in advanced engine modes","authors":"S.M. Shafee,&nbsp;M. Feroskhan","doi":"10.1016/j.nxener.2025.100394","DOIUrl":"10.1016/j.nxener.2025.100394","url":null,"abstract":"<div><div>The pursuit of sustainable energy solutions on a global scale has heightened the exploration of alternative fuels, aimed at reducing greenhouse gas emissions and lessening dependence on fossil fuels. Hydrogen, known for its high energy content and environmentally friendly combustion properties, has emerged as a promising contender for addressing these challenges. When used as a fuel source, hydrogen offers the potential to achieve zero carbon emissions, positioning it as a pivotal element in the shift towards a sustainable energy landscape. Incorporating hydrogen into internal combustion engines (ICEs) has opened avenues for advancing sophisticated combustion modes. These novel modes optimize hydrogen utilization and improve engine efficiency, performance, and ecological sustainability. This article delves into various cutting-edge combustion technologies that harness hydrogen as a primary fuel source, including conventional modes such as dual fuel and advanced modes such as reactivity controlled compression ignition (RCCI), homogeneous charge compression ignition (HCCI), premixed charge compression ignition (PCCI), and gasoline compression ignition (GCI). These advanced modes represent significant progress in the development of hydrogen-fueled engine technology. Each mode offers unique advantages and faces specific challenges. This review aims to provide a comprehensive overview of the current state of these technologies, examining their benefits, limitations, and future research directions necessary to realize the full potential of hydrogen in advanced combustion engines.</div></div>","PeriodicalId":100957,"journal":{"name":"Next Energy","volume":"9 ","pages":"Article 100394"},"PeriodicalIF":0.0,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144885485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}