Energy Storage最新文献

{"title":"Hydrogen Storage Properties of Vanadium-Decorated Holey Graphyne: A Density Functional Theory Study","authors":"Poonam Parkar,&nbsp;Ajay Chaudhari,&nbsp;Brahmananda Chakraoborty","doi":"10.1002/est2.70445","DOIUrl":"https://doi.org/10.1002/est2.70445","url":null,"abstract":"<p>Hydrogen storage remains a key challenge for the practical deployment of hydrogen-based energy systems due to the limited storage capacity and weak hydrogen binding in conventional carbon-based and metal-decorated materials. Using density functional theory (DFT), we have investigated the hydrogen storage characteristics of vanadium-decorated holey graphyne (HGY), which is a recently synthesized form of carbon. Holey graphyne (HGY) possesses intrinsic nanopores and uniformly distributed carbon rings, providing many more anchoring sites for metal atoms and superior hydrogen adsorption compared with traditional carbon materials. Vanadium is selected as the decorating metal due to its favorable d-orbital characteristics, moderate atomic weight, and strong binding to carbon frameworks without clustering. The V atom strongly binds to the HGY sheet with a binding energy equal to −3.25 eV. Each V atom doped on the HGY sheet is capable of adsorbing up to five H₂ molecules. The average H₂ adsorption energy is coming out to be −0.62 eV/H₂. Impressively, the gravimetric hydrogen storage capacity reaches 6.43 wt%, exceeding the US Department of Energy target. Compared to previously reported carbon-based and metal-decorated nanomaterials, the V-doped HGY system exhibits a superior balance of storage capacity, adsorption energy, and thermal stability. Bader charge analysis reveals that the V atom experienced a loss of 0.109e⁻. The hydrogen molecules bond with the V atoms through Kubas interactions, which involve charge donation and back-donation between the metal d-orbital and the H s-orbital. Molecular dynamics simulations based on ab initio methods verify the structural integrity of the V-decorated HGY system at room temperature. The stability of the system at room temperature, the sufficient diffusion energy barrier that prevents metal–metal clustering, the high gravimetric hydrogen uptake, and appropriate adsorption energy all point to V-doped HGY as a very promising material for devices with high-capacity hydrogen storage.</p>","PeriodicalId":11765,"journal":{"name":"Energy Storage","volume":"8 5","pages":""},"PeriodicalIF":4.0,"publicationDate":"2026-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/est2.70445","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148282117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fuel-Modulated Nickel Ferrite for Supercapacitor Application","authors":"Ajay Kumar,&nbsp;Prashant Kumar,&nbsp;Mohan L. Verma,&nbsp;Shalendra Kumar,&nbsp;Gagan Dixit","doi":"10.1002/est2.70439","DOIUrl":"https://doi.org/10.1002/est2.70439","url":null,"abstract":"<div>\u0000 \u0000 <p>Energy storage systems are vital to meet the increasing demand for instant power sources for electric vehicles and portable electronics. This study examines how variations in the concentration of fuel and oxidizers used during synthesis affect the electrochemical performance of nickel ferrite as an electrode in supercapacitors. Three samples of nickel ferrite, NF1, NF2, and NF3, were prepared via the sol–gel auto-combustion method using metal nitrate (oxidizers) to citric acid (fuel) ratios of 1:0.60, 1:0.73, and 1:1. Characterization techniques such as XRD, SEM, EDS, Raman, and FTIR were applied to analyze the structure, crystallite size, morphology, elemental composition, and metal-oxygen bonding. All three samples exhibited a pure spinel phase with varying stoichiometry. Their electrochemical performance was assessed using cyclic voltammetry, galvanostatic charge–discharge, and electrochemical impedance spectroscopy in 1 and 3 M KOH electrolytes. The NF2 electrode demonstrated the highest specific capacitance among the three samples, achieving a value of 834.37 F/g at 1 A/g in 3 M KOH. A symmetric supercapacitor device was fabricated using this electrode, achieving an energy density of 19.26 Wh/kg and a power density of 600 W/kg, with excellent stability retaining 99.97% capacitance after 10 000 cycles. The electrode and electrolyte interaction was studied by density functional theory calculations, and it revealed adsorption energies of −2.22 and −2.38 eV for the OH molecule adsorbed on nickel and iron atoms in nickel ferrite. The results indicate that both fuel and electrolyte concentrations are crucial parameters that need to be optimized to achieve the best performance of the material.</p>\u0000 </div>","PeriodicalId":11765,"journal":{"name":"Energy Storage","volume":"8 5","pages":""},"PeriodicalIF":4.0,"publicationDate":"2026-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148282118","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":"Advancements in Lithium-Ion Battery Thermal Management Systems","authors":"Allaa Abdulqadir Omar,&nbsp;Ahmed Mohammed Adham","doi":"10.1002/est2.70442","DOIUrl":"https://doi.org/10.1002/est2.70442","url":null,"abstract":"<div>\u0000 \u0000 <p>Improving thermal management for lithium-ion batteries is essential for efficient, reliable, and safe energy storage in portable electronics and electric vehicles. This paper presents a comprehensive review of battery thermal management systems, focusing on numerical and experimental advancements reported from 2014 to 2026. The review analyzes 81 studies covering four strategies: air cooling, liquid cooling, phase change material (PCM)-based cooling, and hybrid cooling. Air cooling is examined for simplicity, low cost, and low system complexity, whereas liquid cooling is reviewed for higher heat dissipation capability and improved temperature control. PCM-based systems are evaluated as passive solutions, whereas hybrid systems that combine two or more cooling mechanisms are considered to enhance cooling capacity and respond to variable thermal loads. Across the reviewed studies, inlet temperatures ranged from 5°C to 40°C, discharge rates reached up to 7C, and maximum battery temperatures varied from 23.5°C to 60°C, indicating that battery thermal management system performance depends strongly on thermal load, operating conditions, and design configuration. Each strategy is assessed on thermal performance, temperature uniformity, auxiliary energy demand, system complexity, and cost information, where available. The study highlights advancements in coolants, materials, flow configurations, channel and plate geometries, fin and internal-structure integration, modular designs, and optimization methods, including orthogonal design, topology optimization, and single- or multi-objective optimization. The findings identify key strengths and limitations, as well as design trends and research gaps, all of which inform the development of advanced battery thermal management system technologies for next-generation electric vehicles.</p>\u0000 </div>","PeriodicalId":11765,"journal":{"name":"Energy Storage","volume":"8 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148247853","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":"Protection and Coordination Control Strategy Using Deep Deterministic Policy Gradient for Passive Hybrid Energy Storage Systems","authors":"Kurakula Anudeep,&nbsp;Muzaffar Naveed,&nbsp;Alivelu M. Parimi,&nbsp;Sandip S. Deshmukh,&nbsp;Parikshit Sahatiya","doi":"10.1002/est2.70436","DOIUrl":"https://doi.org/10.1002/est2.70436","url":null,"abstract":"<div>\u0000 \u0000 <p>The increasing integration of photovoltaic (PV) sources for electric vehicle (EV) charging necessitates advanced energy management strategies that reduce grid dependency while ensuring safe and efficient operation of hybrid energy storage systems (HESSs). Passive battery–supercapacitor topologies offer advantages in terms of simplicity, cost, and efficiency. However, their practical deployment is constrained by limited controllability, power oscillations, and inadequate protection under dynamic operating conditions. This study proposes a protection-aware deep deterministic policy gradient-based power coordination framework for a PV-integrated passive HESS–EV system with grid interaction. The proposed controller enhances the operational flexibility of the passive topology by intelligently coordinating power flow among the PV source, battery, supercapacitor, and grid while simultaneously enforcing protection against overcharging and undercharging. The actor–critic architecture enables continuous double-evaluation of control actions, effectively suppressing voltage and power oscillations and preventing abnormal power flow directions. Comprehensive studies incorporating multiple coordination control strategies, followed by real-time validation on an edge-based embedded platform, demonstrate the practical feasibility of the proposed approach. The findings of the study highlight a significant improvement in system effectiveness under the PV-only operating conditions, rising from 57.495% without any control to 66.667% with conventional Stateflow-based logic, and further to 97.278% with the proposed DDPG controller. The experimental results closely align with the desired power coordination outcomes, achieving 96.348% effectiveness on the edge-based embedded platform. These findings confirm that the proposed DDPG-based approaches certain operational characteristics typically associated with active topologies, including improved power coordination and oscillation suppression, while preserving the simplicity and cost advantages of passive HESS, making it a promising solution for next-generation PV-assisted EV charging systems.</p>\u0000 </div>","PeriodicalId":11765,"journal":{"name":"Energy Storage","volume":"8 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148247854","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":"Effect of Finned Arched Enclosure Geometry on the Thermal Performance of Phase Change Material-Cooled Photovoltaic Panels","authors":"Khalid E. Hammo,&nbsp;Omar Mohammed Hamdoon","doi":"10.1002/est2.70438","DOIUrl":"https://doi.org/10.1002/est2.70438","url":null,"abstract":"<div>\u0000 \u0000 <p>To control the operating temperature of photovoltaic (PV) cells and enhance their conversion efficiency, Phase Change Materials (PCMs) are employed as an effective cooling medium attached to the rear surface of the panel. The current study assesses the performance of a passive cooling system based on PCM-paraffin inside a copper-finned enclosure. In addition, this work addressed the influence of container geometry design (arched vs. flat) on the thermal and electrical functional performance. The simulation outcomes corroborated a considerable enhancement with PCM cooling. The operating temperature of the PV cell decreased to 359 K in the arched enclosure, a reduction of 7 K compared to the flat enclosure 366 K, and was significantly lower than the reference PV cell 387 K. Therefore, this reduction in the PV temperature directly enhanced the performance of the PV panel. The arched enclosure achieved a maximum efficiency enhancement of 11.8%, whereas the flat design presented a 9.38% raise. In the context of PCM behavior, the arched design prolonged the solid state by 35.8% and reduced the melting rate by 21% compared to the flat one. This is attributed to the augmentation in the contact surface area that increased viscous effects and restricted convective currents. However, the arched enclosure demonstrated a greater capacity for thermal energy storage. The increase of surface area in arched design led to faster heat loss and, consequently, less thermal inertia at night compared to the flat design, resulting in a fast solidifies of paraffin faster in the arched geometry during the cooling phase at sunset. Our simulation results confirm that the enclosure geometry enhances the performance of the PV system and validates effective passive cooling techniques.</p>\u0000 </div>","PeriodicalId":11765,"journal":{"name":"Energy Storage","volume":"8 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148247855","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":"Analysis of Battery Life Extension and Benefits for Logistics Delivery Robots Based on Cloud-Edge Collaboration","authors":"Yunmei Wu,&nbsp;Hua Huang,&nbsp;Bo Liu,&nbsp;Shaofei Wang,&nbsp;Lei Shang,&nbsp;Zhi Zhang,&nbsp;Juanjuan Wang","doi":"10.1002/est2.70440","DOIUrl":"https://doi.org/10.1002/est2.70440","url":null,"abstract":"<div>\u0000 \u0000 <p>Delivery robots in logistics parks commonly suffer from issues such as insufficient battery lifespan, frequent battery replacements, and a mismatch between scheduling and battery management, resulting in elevated operating costs and low operational efficiency. This paper proposes a cloud-edge collaborative architecture: at the cloud level, an electrochemical degradation model integrating solid electrolyte interphase (SEI) film growth, iron ion leaching, and deep-discharge corrosion is established; an adaptive weight-enhanced genetic algorithm is employed to solve the optimization problems of charging scheduling and state thresholds; at the edge level, millisecond-level real-time control and offline autonomy are implemented, forming a closed-loop system of global optimization, edge execution, and terminal feedback. A 12 months controlled experiment was conducted on 80 robots in a logistics park in the Yangtze River Delta. The results show that the average battery lifespan was extended from 1.8 years to 3.5 years, annual comprehensive operating costs were reduced by 55.3%, and the return on investment reached 239.7%, with significant cumulative economic benefits over 5 years. This method suppresses battery aging at the electrochemical degradation mechanism level, providing a practical intelligent solution for energy management in logistics robot fleets.</p>\u0000 </div>","PeriodicalId":11765,"journal":{"name":"Energy Storage","volume":"8 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148247860","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":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":11765,"journal":{"name":"Energy Storage","volume":"8 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148070330","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":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":11765,"journal":{"name":"Energy Storage","volume":"8 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148070331","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":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":11765,"journal":{"name":"Energy Storage","volume":"8 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148067693","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":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":11765,"journal":{"name":"Energy Storage","volume":"8 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148067692","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}