Journal of energy storage最新文献

{"title":"Research on aging-thermal characteristics coupling and aging thermal management analysis of large-capacity LiFePO4 battery","authors":"Wenhai Zhao ,&nbsp;Chao Meng ,&nbsp;Yingru Zhao ,&nbsp;Shan Xie ,&nbsp;Xingyue Wang ,&nbsp;Chenxing Jiang ,&nbsp;Wanyou Li ,&nbsp;Rui Jing","doi":"10.1016/j.est.2025.115675","DOIUrl":"10.1016/j.est.2025.115675","url":null,"abstract":"<div><div>With the advancement of battery technology and the expansion of market demand, large-capacity lithium batteries are increasingly being used in electric vehicles and energy storage industries. At the same time, battery aging significantly affects the thermal characteristics of lithium batteries. However, research on the coupling of aging characteristics and thermal characteristics of large-capacity lithium batteries is very limited. This study adopts a combined experimental and simulation approach to systematically investigate the relationship between aging and thermal characteristics of large-capacity LiFePO₄ batteries. Firstly, the batteries were cycled at 0.75C under different temperatures, revealing that the aging degree of large-capacity batteries increases sequentially at 10 °C, 25 °C, and 40 °C. Subsequently, the changes in internal resistance and entropy coefficient before and after battery aging were measured, leading to the conclusion that the irreversible heat increases rapidly after aging, while the reversible heat remains almost unchanged. Finally, using experimentally measured parameters, liquid cooling thermal models were established for fresh battery packs and battery packs aged under 10 °C, 25 °C, and 40 °C cycling. The simulation results indicate that after aging, the T_max, T_ave, and ΔT_max inside the battery pack increase significantly, and the aging of the battery pack reduces the effectiveness of the battery thermal management (BTM) system designed for fresh battery packs. To address this issue, it is necessary to increase the inlet flow rate of the coolant to 0.1 m/s and reduce the inlet temperature of the coolant to 21 °C to maintain the effectiveness of the BTM. This study provides important reference significance for the BTM of large-capacity lithium batteries throughout their life cycle.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"114 ","pages":"Article 115675"},"PeriodicalIF":8.9,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143386609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Core-shell structured nickel glycerolate spheres @ amorphous ZIF-67 nanosheets to enhance electrochemical performance of supercapacitors","authors":"Shujun Qiu ,&nbsp;Chenhui Cui ,&nbsp;Guangyao Li ,&nbsp;Yiming Wang ,&nbsp;Longde Duan ,&nbsp;Hailiang Chu ,&nbsp;Fen Xu ,&nbsp;Haiou Li ,&nbsp;Limin Ma ,&nbsp;Yumei Luo ,&nbsp;Qingyong Wang ,&nbsp;Lixian Sun","doi":"10.1016/j.est.2025.115736","DOIUrl":"10.1016/j.est.2025.115736","url":null,"abstract":"<div><div>As the demand for high-efficiency energy storage devices increases, the development of advanced supercapacitor electrode materials has become a critical area of research. In this study, nickel glycerolate spheres coated with ZIF-67 nanosheets are designed and synthesized as a unique core-shell structure for supercapacitor electrode material. The nucleation process of ZIF-67 is carefully controlled to achieve enhanced electrochemical performance by adjusting the molar ratio of ligand-to-metal salt. The obtained Ni-glycerolate@ZIF/1 (ZIF-67 with a 1:1 ligand-to‑cobalt ratio) composite combines the amorphous nature of ZIF-67 with Ni-glycerolate, which delivers a high specific capacitance of 1843 F g⁻¹ at a current density of 1 A g⁻¹. Moreover, an assembled device of the asymmetric supercapacitor is fabricated using Ni-glycerolate@ZIF/1 as cathode and activated carbon as anode, which displays an energy density of 28 Wh kg⁻¹ at a power density of 850 W kg⁻¹, as well as decent cycling stability of 71 % capacitance retention at the 4000th cycle. Such a unique core-shell structure provides increased surface area, contributing to enhanced charge transport and electrochemical performance. This work highlights a promising approach for tailoring metal-organic frameworks for high-energy-density supercapacitor applications.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"114 ","pages":"Article 115736"},"PeriodicalIF":8.9,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143386607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-objective planning of community microgrid based on electric vehicles’ orderly charging/discharging strategy","authors":"Wei Huang ,&nbsp;Keying Luo ,&nbsp;Yikang Li ,&nbsp;Haiqiao Liu ,&nbsp;Jihong Qiang","doi":"10.1016/j.est.2025.115623","DOIUrl":"10.1016/j.est.2025.115623","url":null,"abstract":"<div><div>As the penetration rate of electric vehicles (EVs) in communities increases, the negative impacts of vehicle charging on the power system are also becoming more significant. To enhance the electric vehicle charging capacity of community power grids, this paper proposes a two-tier capacity allocation strategy for community microgrids in the context of power systems. The upper-level model allocates capacity with the objectives of highest MG reliability, minimum comprehensive operating cost and minimum carbon emission, while the lower-level model optimizes the scheduling strategy with the objectives of minimum weighted operating cost and minimum charging cost for EV users. First, the real-time price is used to guide the residents’ electricity consumption behavior to be more adaptive to the uncertainty of renewable energy sources and to ensure that the community MG has sufficient resilient capacity. Second, based on the alternative storage effect of EVs, EVs are integrated with storage batteries and participate in ancillary services. The results indicate that adopting the charging and discharging strategy can reduce the comprehensive operating cost by ¥3,673.575 while improving reliability by 1.925%. Although the carbon trading market increases the overall operating cost, it results in an additional 131.5 kW of renewable energy capacity. Furthermore, the microgrid’s participation in the ancillary service market can reduce costs by ¥7,992.9. Furthermore, a comparison of the GSA-MVO results with those of MVO and SSA demonstrates the superiority of the proposed optimization algorithm in terms of convergence to the optimal solution.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"114 ","pages":"Article 115623"},"PeriodicalIF":8.9,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143386610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new N/O Co-doped soft-hard carbon nanofibers composite for advanced sodium storage","authors":"Yangyang Wang,&nbsp;Wenzheng Zhu,&nbsp;Guanyu Wang,&nbsp;Caiyun Chen,&nbsp;Wei Xu,&nbsp;Yanjiao Li,&nbsp;Lizhuang Chen,&nbsp;Yingying Chen,&nbsp;Hongxun Yang","doi":"10.1016/j.est.2025.115819","DOIUrl":"10.1016/j.est.2025.115819","url":null,"abstract":"<div><div>Carbon-based materials have excellent conductivity, low cost, and environmental friendliness, making them the primary choice for negative electrode in sodium ion batteries (SIBs). Among them, hard-carbon and soft-carbon as amorphous carbon are considered to have potential as negative electrode for SIBs. However, soft-carbon exhibits a slow charging speed and poor low-temperature performance and hard-carbon behaves a low initial coulombic efficiency, resulting in a key obstacle to their extensive applications in SIBs. Herein, a new N/O co-doping soft-hard carbon nanofiber (PCNF) composite was prepared by electrospinning with heat treatment method, petroleum coke (PC) as soft-carbon and oxygen source and polyacrylonitrile (PAN) as hard-carbon and nitrogen source. The optimal PCNF-800 carbonization at 800 °C delivers an enhancement capacity of 296.1 mAh g⁻¹ at 25 mA g⁻¹ after 100 cycles with the capacity retention of 88.2 %. The excellent electrochemical property is ascribed to the co-doping of N/O in the carbon resulting in the large number of defects which could enhance Na⁺ adsorption and transport, the appropriate interlayer spacing, the porous nanofiber mircostructure, and the synergistic effect between soft and hard carbon. Meanwhile, this study provides a possible new idea for the high-value utilization of petroleum coke.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"114 ","pages":"Article 115819"},"PeriodicalIF":8.9,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143386510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Informer-embedded prioritized experience replay-based soft actor-critic for ultra-low frequency oscillation suppression of pumped hydropower storage systems","authors":"Linfei Yin,&nbsp;Wenxuan Huang","doi":"10.1016/j.est.2025.115802","DOIUrl":"10.1016/j.est.2025.115802","url":null,"abstract":"<div><div>The occurrence of multiple ultra-low frequency oscillations in the hydro-dominated grid can lead to the instability of pumped hydropower storages and severely constrain energy delivery in the current trend of interconnected grids. The unreasonable parameter settings of governors exacerbate the negative damping phenomenon, which leads to continuous oscillation of pumped hydropower storages. Therefore, enhancing the damping torque of pumped hydropower storages by adapting governor parameters can suppress frequency oscillations. This study proposes an Informer-embedded prioritized experience replay-based soft actor-critic for hydropower unit governor parameter controllers. Prioritized experience replay improves training efficiency and convergence. Informer improves the ability to forecast systematic time series. After training, the proposed method provides optimal parameters for governors under different disturbance operating conditions. Furthermore, compared with conventional optimization and reinforcement learning algorithms, the proposed method provides superior control effects in single-machine and two-area four-machine systems.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"114 ","pages":"Article 115802"},"PeriodicalIF":8.9,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-objective optimization of hydro-wind-solar generation: A path towards total economy decarbonization with external energy independence in small stand-alone grids","authors":"César Berna-Escriche ,&nbsp;Lucas Alvarez-Piñeiro ,&nbsp;David Blanco ,&nbsp;Yago Rivera","doi":"10.1016/j.est.2025.115695","DOIUrl":"10.1016/j.est.2025.115695","url":null,"abstract":"<div><div>However, integrating renewable sources such as wind and solar photovoltaics presents significant challenges due to their intermittent and unpredictable nature, particularly pronounced in isolated territories and islands with limited grids. El Hierro, a small island in the Spanish Canary Islands Archipelago, hosts a pioneering hydro-wind power plant that covers a substantial portion of its electricity demand. Despite its success, the system's reliance on diesel generators and over-installed hydropower capacity has economic and environmental drawbacks. This study aims to optimize El Hierro's renewable energy system to enhance cost-efficiency, reduce CO₂ emissions, and minimize energy excesses, providing insights for sustainable renewable energy integration in similar isolated systems.</div><div>A multi-objective optimization problem approach was employed using EnergyPLAN and EPLANopt, a genetic algorithm-based tool. The study focused on minimizing annual costs, CO₂ emissions, and energy excesses, generating a Pareto front of optimal solutions under various generation and storage technology constraints. The previously conflicting objectives are converted into a unified cost function. Emissions and surpluses are monetized to evaluate the overall economic impact, allowing a direct comparison of different configurations. The single solution yielding the lowest combined cost provides an optimal system design that balances environmental sustainability, cost-efficiency, and grid reliability.</div><div>Renewable energy capacities of 8–10 MW for solar, 11–13 MW for wind, and 7–9 MW for pumping power, with storage capacities of 400–450 MWh, are optimal. Lifecycle CO₂ emissions were reduced to 6–13 % compared to an entirely fossil fuel-based system, while system costs ranged from 6.2 to 6.7 million euros. Diesel backup, although minimized, remains the most viable dispatchable technology in the absence of geothermal or biomass alternatives.</div><div>The study highlights that pumped hydro systems play a critical role in optimized configurations, contributing significantly to overall costs, while wind and solar generation provide balanced contributions. Incorporating multiple objectives offers a balanced and sustainable system design that aligns with the economic, environmental, and reliability goals of El Hierro and other isolated renewable systems.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"114 ","pages":"Article 115695"},"PeriodicalIF":8.9,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143386501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Micropore-modulated graphitization for the construction of high-capacity hard carbon anode for sodium-ion batteries","authors":"Zhihua Duan ,&nbsp;Xiaoji Ye ,&nbsp;Jingxun Chen ,&nbsp;Jieqi Chen ,&nbsp;Jiakun Li ,&nbsp;Zhenghui Li","doi":"10.1016/j.est.2025.115674","DOIUrl":"10.1016/j.est.2025.115674","url":null,"abstract":"<div><div>The defects adsorption and closed pore filling contribute most of the specific capacity of hard carbon anode for sodium-ion batteries. Therefore, constructing a carbon framework with rich defects and closed pores is a promising method to achieve large Na⁺ storage capacity. However, this is difficult to realize because moderate graphitization facilitates the creation of closed pores but causes the elimination of structural defects. In the current work, we find that micropores can effectively hinder the ordered arrangement of carbon layers, thereby raising the graphitization temperature by ≈500 °C. Based on this, with appreciable carbonization temperature, a novel hard carbon incorporating rich defects and well-developed closed pores is developed. This hard carbon displays both large slope and plateau capacities, thus delivering a very high Na⁺ storage capacity of 365 mAh g⁻¹, significantly exceeding the conventional hard carbon (253 mAh g⁻¹). This work provides an innovative and reliable strategy for constructing high-performance hard carbon anode, which may shed light on promoting sodium-ion battery cells.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"114 ","pages":"Article 115674"},"PeriodicalIF":8.9,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143386254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental study of 1-octadecanol composite phase change materials for solar energy storage system","authors":"Xin Tan,&nbsp;Yunfei Wang,&nbsp;Maosen Zhao,&nbsp;Pengbo Sun","doi":"10.1016/j.est.2025.115763","DOIUrl":"10.1016/j.est.2025.115763","url":null,"abstract":"<div><div>Due to the low thermal conductivity of traditional phase change materials (PCMs), their widespread application in solar thermal energy storage systems is limited. Improving the heat transfer performance is crucial for optimizing energy storage systems. To address this, this study prepared composite phase change materials (CPCMs) based on 1-octadecanol (OD) using expanded graphite (EG) and nano-diamond particles as thermal conductivity enhancers. The study shows that when OD/EG7 CPCMs are used as the matrix, and diamond particles with an average size of 100 nm and a mass fraction of 3 % are added, the thermal conductivity of the CPCMs reaches 2.992 W/(m·K), which is a 900.67 % improvement over pure OD. The heat storage/release rates increase by 135.4 % and 84.04 %, respectively. This improvement is attributed to the network structure formed by EG, which effectively reduces the possibility of sedimentation and agglomeration of diamond particles. Additionally, its synergistic effect with the diamond particles creates more heat pathways and a larger heat exchange area, significantly enhancing the heat transfer capacity. After 200 thermal cycles, the phase change temperature of OD/EG7/Diamond3 CPCMs remains almost unchanged, and the phase change latent heat increases, ranging from 216.97 J/g to 227.83 J/g, with an increase of 1.29 % to 2.85 %. This demonstrates excellent thermal cycling stability. This study significantly improves the thermal conductivity of PCMs through the synergistic effect of expanded graphite and nano-diamond particles, providing an efficient solution for solar thermal energy storage systems with broad application prospects.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"114 ","pages":"Article 115763"},"PeriodicalIF":8.9,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143386511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical and experimental study of an underground thermal energy storage system coupled with asphalt solar collector and heat pump","authors":"Prince Sevi ,&nbsp;Frédéric Bernardin ,&nbsp;Alexandre Cuer ,&nbsp;Benoit Stutz","doi":"10.1016/j.est.2025.115769","DOIUrl":"10.1016/j.est.2025.115769","url":null,"abstract":"<div><div>This article concerns the design of a low temperature underground thermal energy storage (UTES) that could be used to store the solar thermal energy produced by asphalt solar collectors (ASC) and use it to cover the heating and domestic hot water needs of buildings. The amount of energy stored in the UTES is significantly increased by exploiting the latent phase change energy in the storage thanks to a heat pump. To do this, the storage uses original horizontal helical heat exchangers to charge and discharge the thermal storage, and water-saturated sand as the storage material which makes it possible to deal with problems of water density change without soil swelling. The performance of the storage system is studied throughout the year. Particular attention is paid to periods of partial freezing in the depths of winter. A 1D transient model of heat transfer in the UTES is developed. The model predictions are compared to experiments on a prototype incorporating material icing.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"114 ","pages":"Article 115769"},"PeriodicalIF":8.9,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Enhancing performance of supercapacitor based hybrid energy storage system using R-S-T controller in an islanded DC microgrid","authors":"Akram M. Abdurraqeeb ,&nbsp;Abdullrahman A. Al-Shamma'a ,&nbsp;Abdulaziz Alkuhayli ,&nbsp;Mohammed Alharbi ,&nbsp;Hassan M. Hussein Farh ,&nbsp;Khaled E. Addoweesh","doi":"10.1016/j.est.2025.115522","DOIUrl":"10.1016/j.est.2025.115522","url":null,"abstract":"<div><div>The hybrid energy storage system (HESS) is an effective solution for managing power and utilizing unpredictable renewable energy resources in isolated DC microgrids. This paper proposes a new approach that combines RST control with filter-based (RST-FB) technology. The RST controller is based on a polynomial structure comprising three polynomials: R (Regulation), S (Sensitivity), and T (Tracking). The aim of this approach is twofold: firstly, to prevent state-of-charge (SoC) violations of the supercapacitor (SC) within the HESS in an isolated DC microgrid, and secondly, to ensure uninterrupted operation of the SC when the system experiences a significant constant power load (CPL) or abrupt load changes that cannot be effectively mitigated using conventional filter-based (CFB)schemes. By preventing SoC violations and ensuring uninterrupted operation, this approach ensures that the SC operates within its safe and efficient range and minimizes stress on the battery. This approach enhances overall system performance by improving transient response and voltage stability. Furthermore, the proposed method extends the lifespan of both the SC and the battery by efficiently managing power distribution among system components, thereby increasing operational efficiency during load fluctuations. These results highlight the method's effectiveness in optimizing reliability and durability within an isolated DC microgrid incorporating a HESS. The proposed RST-FB scheme was evaluated and compared with the CFB scheme via MATLAB simulation conducted on an isolated DC microgrid incorporating HESS. The results indicate that the RST-FB scheme outperforms the CFB scheme by effectively preventing SoC violations, ensuring continuous operation, improving power sharing between the HESS, and maintining stable regulation of the DC bus voltage. Furthormore, the efficacy of the proposed scheme was validated through real-time hardware-in-the-loop (HIL) simulations.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"113 ","pages":"Article 115522"},"PeriodicalIF":8.9,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143386907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}