Journal of energy storage最新文献

{"title":"Multifunctional phase-change materials with Ni-MOF/MXene hierarchical network for thermal energy storage, photothermal conversion, and excellent electromagnetic shielding","authors":"Yuting He ,&nbsp;Yongjin Zou ,&nbsp;Lixian Sun ,&nbsp;Fen Xu ,&nbsp;Yongpeng Xia ,&nbsp;Yulian Chen ,&nbsp;Shunxiang Wang ,&nbsp;Zhicong Hu ,&nbsp;Sijia Hao ,&nbsp;Cuili Xiang","doi":"10.1016/j.est.2025.116385","DOIUrl":"10.1016/j.est.2025.116385","url":null,"abstract":"<div><div>Developing phase change materials (PCMs) that combine energy storage, thermal management, and electromagnetic shielding is important for improving electronic devices and renewable energy systems, meeting the growing need for efficient and compact thermal solutions. This study presents a novel multifunctional composite PCM (CPCM) that integrates energy storage, electromagnetic shielding, and photothermal-electric conversion. The composite was synthesized by electrostatically assembling a 3D Ni-MOF/MXene network, followed by vacuum-assisted impregnation of paraffin wax (PW). The PW@Ni-MOF/MXene composite exhibited a high melting enthalpy of 177.35 J g⁻¹ and crystallization enthalpy of 176.73 J g⁻¹, indicating superior energy storage capacity. Additionally, the CPCM demonstrated exceptional photothermal conversion efficiency of 96.70 %, effectively absorbing solar energy across the spectrum. The electromagnetic shielding properties of PW@Ni-MOF/MXene was also notable, with a minimum reflection loss of −51.76 dB at 17.78 GHz. The layered porous structure of the Ni-MOF/MXene network significantly enhanced the thermal conductivity of composites, reaching 0.5065 W m⁻¹ K⁻¹, 353 % higher than pure PW. These properties make the PW@Ni-MOF/MXene CPCM a promising candidate for advanced applications in thermal management, electromagnetic shielding, and photothermal-electric energy conversion systems.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"119 ","pages":"Article 116385"},"PeriodicalIF":8.9,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715639","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":"Flexible free-standing anodes of cobalt and carbon dot-coated porous carbon nanofibers for enhanced sodium-ion battery performance","authors":"Jianhui Qin ,&nbsp;Weibo Meng ,&nbsp;Baolin Xing ,&nbsp;Qinglin Hou ,&nbsp;Huihui Zeng ,&nbsp;Xiaoxiao Qu ,&nbsp;Song Cheng ,&nbsp;Chuanxiang Zhang ,&nbsp;Zhengfei Chen","doi":"10.1016/j.est.2025.116270","DOIUrl":"10.1016/j.est.2025.116270","url":null,"abstract":"<div><div>Flexible electrode materials have attracted attention due to their potential to expand the operational environments of sodium-ion batteries (SIBs). Herein, we successfully developed porous carbon nanofibers (CNF@CDs@CoOx) with favorable flexibility using an electrospinning method. This process utilized coal-based carbon dots as the precursor, polyacrylonitrile as spinning carrier and cobalt chloride as dopant. The resulting CNF@CDs@CoOx features a unique 3D cross-linked fiber network structure with rationally incorporated CoOx particles. This 3D architecture not only enhances the structural stability of the electrode materials but also allows the small and uniformly distributed CoOx particles to significantly improve the utilization of the active materials and endure the strain during Na⁺ insertion and extraction. The optimized CNF@CDs@CoOx-750 exhibits a suitable average diameter of 97 nm, a large specific surface area of 462.3 m² g⁻¹ and a rich nitrogen content of 9.67 wt%. Benefiting from these unique microstructural features, the CNF@CDs@CoOx-750 adopted as anode for SIBs displays prominent electrochemical features with high reversible capacity of 320 mAh·g⁻¹ at 20 mA·g⁻¹ and superior cycle stability, retaining 72 % of its capacitance after 400 cycles at 100 mA·g⁻¹. This study provides an effective strategy to prepare flexible electrode materials with high capacity and superior cycling performance, paving the way for advancements in anode materials for SIBs.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"119 ","pages":"Article 116270"},"PeriodicalIF":8.9,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716208","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":"An improved meta-heuristic algorithm for energy optimization in smart grids considering photovoltaic, storage battery, and demand response","authors":"Ghulam Hafeez ,&nbsp;Safeer Ullah ,&nbsp;Mazhar Islam ,&nbsp;Farrukh Aslam Khan ,&nbsp;Ahmed S. Alsafran ,&nbsp;Baheej Alghamdi ,&nbsp;Habib Kraiem","doi":"10.1016/j.est.2025.115929","DOIUrl":"10.1016/j.est.2025.115929","url":null,"abstract":"<div><div>Residential load scheduling in smart power grids (SPGs), especially those incorporating renewable energy sources (RESs), storage battery, and demand response (DR) faces significant challenges due to the limitations of traditional optimization algorithms. These challenges include premature convergence, high computational costs, imbalanced exploration and exploitation, lack of adaptability, and sensitivity to parameters. Such issues make it difficult to effectively manage energy consumption, alleviate peak loads, and reduce energy costs while maintaining user comfort. To address these challenges, we propose an improved particle swarm optimization (IPSO) algorithm that enhances exploration and exploitation balance through inertia weight adjustment, velocity damping, and the inclusion of crossover and mutation strategies. These enhancements prevent premature convergence and allow for faster, more accurate convergence to optimal solutions. The proposed IPSO is integrated into a power usage scheduler (PUS) for optimal residential load scheduling under an adaptive pricing scheme considering photovoltaic (PV) and storage battery, focusing on reducing peak energy usage, rebound peaks, energy costs, and user discomfort. The effectiveness of the IPSO-based PUS is demonstrated through a comparison with other optimization algorithms such as genetic optimization algorithm (GOA), particle swarm optimization (PSO), and wind-driven optimization (WDO). Results show that the IPSO algorithm consistently outperforms these alternatives in terms of energy consumption, peak energy alleviation, cost reduction, and grid stability, while also achieving faster execution times and superior convergence rates. This work provides a robust solution for residential load scheduling, offering significant insights and practical benefits for energy optimization in SPGs.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"119 ","pages":"Article 115929"},"PeriodicalIF":8.9,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716212","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":"Superb high-temperature energy storage performances obtained in all-organic sandwich-structured dielectric capacitors","authors":"Ben Jia ,&nbsp;Jiaqi Wang ,&nbsp;Yuliang Zhou ,&nbsp;Tengyue Liu ,&nbsp;Peng Zheng ,&nbsp;Wangfeng Bai ,&nbsp;Qiaolan Fan ,&nbsp;Liang Zheng ,&nbsp;Yang Zhang","doi":"10.1016/j.est.2025.116397","DOIUrl":"10.1016/j.est.2025.116397","url":null,"abstract":"<div><div>As power electronics technology continues to advance, there is an increasing demand for capacitors of operating at high temperatures. However, among the pure polymers studied, polyvinylidene fluoride (PVDF) exhibits a high dielectric constant (<em>ε</em>_r) but poor thermal stability, limiting its use in extreme conditions. Polyetherimide (PEI) offers excellent thermal stability at 150 °C, but its low dielectric constant restricts its applications. To overcome this issue, a sandwich-structured film, consisting of PEI as the outer layers and PVDF as the central layer, is prepared in this study. This sandwich structure effectively combines the high <em>ε</em>_r of PVDF with the high operating temperature of PEI. Moreover, the interfaces between adjacent layers effectively impede charge carrier movement and enhance the breakdown strength. As a result, a remarkable discharge energy density (<em>U</em>_d) of 11.99 J cm⁻³ is realized at room temperature under an enhanced breakdown strength (<em>E</em>_b) of 540 MV m⁻¹. More importantly, it demonstrates excellent capacitive performances at 150 °C with an impressive <em>U</em>_d of 6.20 J cm⁻³ and an efficiency (<em>η</em>) of up to 71 %. All these results demonstrate that the sandwich-structured film design incorporating PVDF and PEI offers a feasible approach for fabricating high-temperature capacitors.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"119 ","pages":"Article 116397"},"PeriodicalIF":8.9,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715581","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":"Modelling green hydrogen storage in salt caverns: Implications of future storage demands on cavern operation","authors":"Lars Höpken,&nbsp;Heinz Bekebrok,&nbsp;Adam Pluta,&nbsp;Hendrik Langnickel,&nbsp;Ievgeniia Savchenko,&nbsp;Marco Ohm,&nbsp;Oscar Steinmann,&nbsp;Marco Zobel,&nbsp;Alexander Dyck,&nbsp;Carsten Agert","doi":"10.1016/j.est.2025.116150","DOIUrl":"10.1016/j.est.2025.116150","url":null,"abstract":"<div><div>The transition to a renewable energy system based mainly on an electricity and hydrogen infrastructure places new requirements and constraints on the infrastructure systems involved. This study investigates the impact of future hydrogen storage demands on a representative salt cavern, considering two cases: a regional focus on Lower Saxony with high wind energy penetration, and a national perspective on Germany with a PV-dominated mix of installed capacities. A numerical model is developed for in-depth assessment of the thermodynamics inside the cavern. Hydrogen storage profiles, generated from 2045 renewable electricity projections for Germany, reveal substantial storage demands. Key parameters, such as hydrogen production and storage share, turnover rate, and storage interval length, vary significantly between the two cases. In the Lower Saxony case, high wind shares lead to increased turnover rates and reduced required working gas volumes, but also result in steeper pressure and temperature gradients inside the cavern and necessitate larger compressor systems. In contrast, the PV-dominated Germany case experiences lower internal cavern stresses but requires more flexible surface components to manage frequent fluctuations in hydrogen flow. These findings underscore the complex interplay between regional power mixes, storage facility design, and operational requirements.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"119 ","pages":"Article 116150"},"PeriodicalIF":8.9,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716210","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":"Study on the flow and pressure pulsation characteristics in the hump region of pump- turbine based on C-shaped blade design","authors":"Guangtai Shi ,&nbsp;Ning Wang ,&nbsp;Huanhuan Liu ,&nbsp;Haigang Wen ,&nbsp;Zongliu Huang ,&nbsp;Jiliang Wu","doi":"10.1016/j.est.2025.116246","DOIUrl":"10.1016/j.est.2025.116246","url":null,"abstract":"<div><div>The main part of a pumped storage power plant is the reversible pump-turbine. The unstable hydraulic behavior known as the “hump characteristic” can make the reversible Pump-Turbine less stable. Concurrently, unsteady factors like flow separation in the guide vane area and pressure changes in the leafless area between the guide vane and runner cause unsteady vortices to form in the flow channel, which greatly increases the likelihood of hump formation and reduces the unit's operational stability. The performance curve of the reversible Pump-Turbine runner blade may be efficiently altered by refining its shape. In order to improve the hydraulic properties of the reversible Pump-Turbine, a “C” type runner blade has been devised. The reliability of the numerical calculation approach is first confirmed by comparing the results of simulation tests with the numerical simulation of the original runner's unit speed and unit flow characteristics under various operating situations. Six distinct “C” type runners are then created for the first Pump-Turbine unit. The complete characteristic curves of many “C” type runners and the original runner are thoroughly compared, with particular attention paid to flow characteristics, eddy current behavior in the hump area, and “S” characteristic curve analysis. Ultimately, the best runner is chosen based on these comparisons. Additionally, there is a moderate improvement in the eddies in the leafless zone between the guide vane and the runner, as well as between the active guide vane and the fixed guide vane. Furthermore, the draft pipe's flow pattern has improved noticeably close to its design condition, with a notable decrease in the vortex band on its top portion. An ideal C-type runner was chosen for the examination of frequency domain diagrams in the bladeless zone, draft pipe, and runner in order to examine the pressure pulsation characteristics at the maximum operating point (0.85Q_d) inside the hump area. The maximum pulsation amplitude within the bladeless zone decreased by 24 %, the pulsation amplitude in the trailing tube decreased by 6.8 %, and the runner itself decreased by 30 %, according to the results. Without sacrificing rated pump-turbine operating conditions or performance features outside of “S” characteristic areas, these results show that the use of “C” blades may successfully reduce unstable flow phenomena inside hump zones. This study offers useful information for lowering hydraulic losses, enhancing the stability of hump areas, and eliminating unit pressure pulsations; as a result, it may be used as a benchmark to improve pump-turbine stability overall.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"119 ","pages":"Article 116246"},"PeriodicalIF":8.9,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715584","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":"Carbon coated 1 T/2H MoS2 nanosheets on carbon cloth for high-performance flexible supercapacitor with superior mechanical stability","authors":"Yifei Zhou ,&nbsp;Kai Le ,&nbsp;Lina Gao ,&nbsp;Huijie Zhang ,&nbsp;Yanbin Xu ,&nbsp;Shusheng Xu","doi":"10.1016/j.est.2025.116389","DOIUrl":"10.1016/j.est.2025.116389","url":null,"abstract":"<div><div>High-performance flexible energy storage devices with excellent mechanical stability are essential for flexible electronic devices. Molybdenum disulfide (MoS₂) is a promising candidate for flexible supercapacitor electrode materials owing to its relatively high theoretical specific capacitance and mechanical flexibility. However, poor structural stability during electrochemical reactions significantly hinders its practical application in flexible supercapacitors. Carbon coatings have been regarded as the effective ways to improve the structural stability. In this study, carbon-coated 1 T/2H MoS₂ nanosheets on carbon cloth have been prepared for flexible supercapacitor applications with high cycling performance and mechanical stability. Field-emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy measurement results reveal that a gentle carbon coating process avoids the transformation from 1 T to 2H MoS₂ phase. As expected, carbon coated 1 T/2H MoS₂ electrode exhibits the highest specific capacitance of 443 mF cm⁻² at 1 mA cm⁻² and excellent cycling stability with 109 % capacity retention after 10,000 cycles. The as-assembled flexible symmetric supercapacitor shows high specific capacitance of 108.3 mF cm⁻² and maintains about 85 % cycling stability after 10,000 cycles. More significantly, the device shows superior flexibility and mechanical stability with 113 % capacitance retention after 5000 bending cycles, suggesting its great potential application in flexible electronic devices.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"119 ","pages":"Article 116389"},"PeriodicalIF":8.9,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716206","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":"Achieving 3D Ti3C2TX hydrogel cathode by cation electrochemical intercalation and gelation for a zinc-ion hybrid supercapacitor with high energy density","authors":"Xingyu Wang,&nbsp;Haiping Wang,&nbsp;Jun Fan,&nbsp;Xinmiao Liu,&nbsp;Shuwei Zhang,&nbsp;Shutong Meng,&nbsp;Wenjie Yan,&nbsp;Jiaqi He,&nbsp;Zhansheng Lu,&nbsp;Zenghui Qiu,&nbsp;Haijun Xu,&nbsp;Xin Zhang","doi":"10.1016/j.est.2025.116375","DOIUrl":"10.1016/j.est.2025.116375","url":null,"abstract":"<div><div>Zinc-ion hybrid supercapacitors (ZHSCs) combine the characteristics of the high power density of supercapacitors (SCs), the high energy density of batteries, and cost benefits of zinc-ion technology, which have broad prospects. At present, Ti₃C₂T_X shows great application potential in the field of SCs, but the electrochemical performance is seriously affected by the tight accumulation between the layers. In this paper, Ti₃C₂T_X was assembled into a 3D structure to form Ti₃C₂T_X-reduced graphene oxide (RGO) hydrogel by a low-temperature hydrothermal graphene oxide (GO)-gelation process. Subsequently, Zn²⁺ ions were inserted into the van der Waals (vdW) gap of the layered Ti₃C₂T_X of the Ti₃C₂T_X-RGO hydrogel by an electrochemical intercalation technology. The formative Zn²⁺-Ti₃C₂T_X-RGO hydrogel has good mechanical strength, fast ion transport rate, and abundant active sites. The material was then used as free-standing cathode and zinc foil as the anode to construct a ZHSC, which possessed a large operating voltage (2.0 V), a high energy density of 172.8 Wh kg⁻¹, a high power density of 9625.5 Wh kg⁻¹, and a good cycling stability (retention of 79.5 % of the capacitance after 5000 cycles at 10 A g⁻¹). This work highlights the unique potential of Ti₃C₂T_X-based hydrogels as viable electrode materials for ZHSCs.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"119 ","pages":"Article 116375"},"PeriodicalIF":8.9,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715583","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":"Single-port and multi-port self-reconfigurable battery topologies for dynamic cell balancing","authors":"Bharath Y.K. ,&nbsp;Anandu V.P. ,&nbsp;Vinatha U. ,&nbsp;Purushothama G.K.","doi":"10.1016/j.est.2025.116402","DOIUrl":"10.1016/j.est.2025.116402","url":null,"abstract":"<div><div>Conventional batteries in electric vehicles (EVs) typically have fixed series-parallel configurations and experience issues such as over-charging/over-discharging and under capacity utilization due to cell imbalance. To address this, a novel single-port self-reconfigurable battery topology is proposed in this paper to balance the cells while maintaining stable terminal voltage. The switching circuit of the topology is designed to have high degree of reconfigurability with minimum number of switches. A supercapacitor is incorporated in the switching circuit to assist the battery during reconfiguration, which also enhances the dynamic performance of the battery. Further, the EV motor-drive and auxiliary loads operate at different nominal voltages; which are typically supplied through power electronic converters. To eliminate the need for power electronic DC-DC converters, a multi-port self-reconfigurable battery topology with stable port voltages is proposed, capable of providing different port voltages. The proposed topologies are verified by developing a single-port battery with a nominal voltage of 52 V and a three-port battery with nominal port voltages of 52 V, 24 V and 12 V using MATLAB/Simulink. The simulation results demonstrate the effectiveness of the proposed topologies in addressing cell imbalance issues, ensuring maximum capacity utilization and stable port voltages.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"119 ","pages":"Article 116402"},"PeriodicalIF":8.9,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716211","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":"Enabling high working voltage and rate capability of NASICON cathode via moderately regulating coordination environment","authors":"Chenxi Jiang ,&nbsp;Qinqin Yu ,&nbsp;Yuan-Li Ding","doi":"10.1016/j.est.2025.116398","DOIUrl":"10.1016/j.est.2025.116398","url":null,"abstract":"<div><div>Sodium super ionic conductor (NASICON)-type Na₃V₂(PO₄)₃ (NVP) has been considered as a promising cathode candidate for sodium ion batteries (SIBs) due to its three dimensional (3D) ionic diffusion channels, high structural and thermal stability. However, such cathode usually involves a two-electron reaction with the V⁴⁺/V³⁺ couple at ~3.4 V, showing a limited specific capacity. Moreover, NVP always suffers from poor electronic conductivity and sluggish Na⁺ diffusion kinetics, resulting in poor rate capability. Herein, a V-site Mn (15 mol%) regulation strategy together with 3D interconnected porous carbon/graphene framework has been developed for constructing Na_3.3V_1.7Mn_0.3(PO₄)₃@3D porous hybrids (3DP-NVMP-Mn0.3) for not only enhancing working voltage of the V⁴⁺/V³⁺ couple but also activating electrochemical activity of the V⁵⁺/V⁴⁺ couple in NVP cathode. Compared to 3DP-NVMP-Mn0.1 (5 mol% Mn) and 3DP-NVMP-Mn0.5 (25 mol% Mn), 3DP-NVMP-Mn0.3 exhibits the highest specific capacity of 119.8 mAh g⁻¹ and the highest energy density of 413.0 Wh kg⁻¹ at the material level at 0.1C, better rate capability up to 20C (89.2 mAh g⁻¹), and a capacity retention of 75.87 % after 8000 cycles at 20C, outperforming the theoretical capacity (117 mAh g⁻¹) and energy density (397 Wh kg⁻¹) of NVP.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"119 ","pages":"Article 116398"},"PeriodicalIF":8.9,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715641","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}