Journal of energy storage最新文献

Lithium-ion battery state of charge prediction under multiple aging stages: an animated oat optimization algorithm-optimized temporal convolutional network-attention model study 多老化阶段下锂离子电池充电状态预测：一种动画燕麦优化算法-优化时间卷积网络注意模型研究

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2025-10-25 DOI: 10.1016/j.est.2025.119117

Jintao Zhou , Kaimin Liu , Zhi Jiang , Penghong Liao

{"title":"Lithium-ion battery state of charge prediction under multiple aging stages: an animated oat optimization algorithm-optimized temporal convolutional network-attention model study","authors":"Jintao Zhou , Kaimin Liu , Zhi Jiang , Penghong Liao","doi":"10.1016/j.est.2025.119117","DOIUrl":"10.1016/j.est.2025.119117","url":null,"abstract":"<div><div>Accurate state of charge (SOC) estimation for lithium-ion batteries across their entire lifespan is crucial for battery management systems (BMS) but remains challenging due to capacity degradation. To enhance the robustness of SOC prediction under multiple aging stages, this study proposes a novel hybrid model named AOO-TCN-Attention. The model integrates a temporal convolutional network (TCN) to capture long-term temporal dependencies, an attention mechanism to adaptively focus on critical features, and the animated oat optimization (AOO) algorithm to globally optimize the hyperparameters of the TCN-Attention structure. The model was validated using a dataset from A123 18,650 cells aged over 3200 cycles under rigorous conditions. The results demonstrate that the AOO-TCN-Attention model achieves superior performance, with the root mean square error (RMSE) and mean absolute error (MAE) remaining below 2.25 % and 1.8 %, respectively, and the coefficient of determination (R<sup>2</sup>) exceeding 98.95 % at all tested aging cycles. In comparative tests, the proposed model significantly outperformed both long short-term memory (LSTM) and standard TCN models. Its exceptional generalization capability was further confirmed on a more demanding dataset, where it maintained robust performance (RMSE < 2.5 %, MAE < 2.0 %, R<sup>2</sup> <span><math><mo>≈</mo></math></span> 99 %) even at severe aging states. This study provides a highly accurate and reliable solution for SOC estimation throughout a battery's entire lifecycle.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"140 ","pages":"Article 119117"},"PeriodicalIF":8.9,"publicationDate":"2025-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145365968","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}

引用次数: 0

A bi-level distributed optimization framework to unlock flexibility in grid-connected energy storage systems and electric vehicle fleets 一个双层分布式优化框架，解锁并网储能系统和电动汽车车队的灵活性

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2025-10-25 DOI: 10.1016/j.est.2025.119107

Saeid Fatemi , Abbas Ketabi , Seyed Amir Mansouri

{"title":"A bi-level distributed optimization framework to unlock flexibility in grid-connected energy storage systems and electric vehicle fleets","authors":"Saeid Fatemi , Abbas Ketabi , Seyed Amir Mansouri","doi":"10.1016/j.est.2025.119107","DOIUrl":"10.1016/j.est.2025.119107","url":null,"abstract":"<div><div>The growing integration of renewable energy sources (RES) into power grids has introduced significant operational variability, amplifying the need for robust flexibility solutions to maintain grid reliability. Demand-side resources, such as flexible loads and electric vehicle (EV) fleets, present cost-effective avenues for balancing supply and demand dynamics. This study proposes a decentralized bi-level optimization framework to enhance the utilization of demand-side flexibility and energy storage systems while ensuring market participant privacy. A Virtual Storage Plant (VSP) model is introduced to coordinate distributed energy storage assets under the supervision of the Transmission System Operator (TSO). The upper-level problem represents the TSO's strategic planning, while the lower-level problem addresses the operation of VSPs, EV parking facilities, and flexible loads. To optimize market interactions and minimize information exchange between the TSO and service providers, an adaptive Alternating Direction Method of Multipliers (ADMM) is employed. The proposed framework is validated using a 30-bus power transmission system, solved through the GUROBI solver within the GAMS environment. The results indicate an 18.7 % reduction in energy balancing costs and a 12 % decrease in transmission losses, alongside a 60 % improvement in convergence speed, demonstrating enhanced coordination, cost efficiency, and privacy preservation.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"140 ","pages":"Article 119107"},"PeriodicalIF":8.9,"publicationDate":"2025-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145365972","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}

引用次数: 0

Physics-informed neural networks for degradation diagnosis of lithium-ion batteries via electrochemical impedance spectroscopy 基于电化学阻抗谱的锂离子电池退化诊断的物理信息神经网络

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2025-10-25 DOI: 10.1016/j.est.2025.119127

Shiqin Chen , Qi Zhang , Dafang Wang , Ziwei Hao , Xuan Liang , Bingbing Hu

{"title":"Physics-informed neural networks for degradation diagnosis of lithium-ion batteries via electrochemical impedance spectroscopy","authors":"Shiqin Chen , Qi Zhang , Dafang Wang , Ziwei Hao , Xuan Liang , Bingbing Hu","doi":"10.1016/j.est.2025.119127","DOIUrl":"10.1016/j.est.2025.119127","url":null,"abstract":"<div><div>Lithium-ion batteries (LIBs) inevitably experience performance degradation during long-term service, driven by numerous interrelated coupled mechanisms. Relying solely on state of health (SOH) is insufficient for effective degradation diagnosis. Extracting degradation modes (DMs) provides more comprehensive guidance for understanding degradation mechanisms, optimizing battery design, and developing control strategies. Electrochemical impedance spectroscopy (EIS), as a non-invasive diagnostic tool, offers valuable internal kinetic information and serves as an effective supplement to time-domain data. In this study, a general and high-accuracy impedance decoupling and parameter approximation method is proposed to efficiently extract key health indicators (HIs) associated with battery degradation from EIS. Two physics-informed neural networks (PINNs) with different architectures are constructed to map HIs to SOH and DMs. To address the challenge of acquiring labeled aging data, the proposed PINNs achieve accurate SOH and DMs prediction using only 20 % of early-stage aging data for model training. The effectiveness and generalization of the proposed method are systematically validated using both widely adopted open-access datasets and in-house datasets. The results indicate that PINN framework consistently achieve root-mean-square errors below 2 % in estimating SOH and DMs across varying cell types, SOC levels, and aging states, demonstrating strong robustness, adaptability, and predictive reliability. This work provides a novel PINN design strategy for online degradation diagnosis based on early-stage EIS data, offering significant theoretical insights and practical value for battery management.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"140 ","pages":"Article 119127"},"PeriodicalIF":8.9,"publicationDate":"2025-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145365971","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}

引用次数: 0

Advanced battery thermal management systems: Technologies, integration challenges, and future trends 先进电池热管理系统：技术、集成挑战和未来趋势

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2025-10-25 DOI: 10.1016/j.est.2025.119094

Zhiguang Bao , Zihao Wu , Hao Chen , Yanlei Ma , Zhenhua Ji , Fengyu Sun , Ding Luo

{"title":"Advanced battery thermal management systems: Technologies, integration challenges, and future trends","authors":"Zhiguang Bao , Zihao Wu , Hao Chen , Yanlei Ma , Zhenhua Ji , Fengyu Sun , Ding Luo","doi":"10.1016/j.est.2025.119094","DOIUrl":"10.1016/j.est.2025.119094","url":null,"abstract":"<div><div>With the rapid development of electric vehicles and stationary energy storage systems, the thermal safety and performance reliability of lithium-ion batteries have become critical concerns. Battery thermal management systems (BTMS) play a pivotal role in regulating temperature, enhancing operational stability, and mitigating thermal runaway risks. This review provides a comprehensive overview of recent advances in BTMS technologies, systematically categorized into passive, active, and hybrid approaches. Passive strategies, such as heat pipes and phase change materials, offer energy-free operation and structural simplicity but are limited by low thermal conductivity and slow response under dynamic loads. Active cooling methods, including air, liquid, and thermoelectric cooling, deliver controllable and efficient heat removal, though they often involve increased complexity and energy consumption. Hybrid systems integrate multiple mechanisms to achieve synergistic benefits, significantly improving temperature uniformity, transient response, and safety redundancy. Furthermore, this review compares key performance metrics across different BTMS architectures and outlines current challenges in heat transfer efficiency, system integration, and cost-effectiveness. Finally, emerging trends such as data-driven thermal control, multifunctional material integration, and structural co-design are discussed, offering insights into the future direction of intelligent and adaptive thermal management for next-generation battery systems.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"140 ","pages":"Article 119094"},"PeriodicalIF":8.9,"publicationDate":"2025-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145365878","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}

引用次数: 0

Integrated cold release-purification method for enhanced efficiency in packed bed cryogenic energy storage systems 提高填充床低温储能系统效率的集成冷释放-净化方法

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2025-10-25 DOI: 10.1016/j.est.2025.119102

Yunong Liu, Xiufen He, Zhongqi Zuo, Lige Tong, Li Wang

{"title":"Integrated cold release-purification method for enhanced efficiency in packed bed cryogenic energy storage systems","authors":"Yunong Liu, Xiufen He, Zhongqi Zuo, Lige Tong, Li Wang","doi":"10.1016/j.est.2025.119102","DOIUrl":"10.1016/j.est.2025.119102","url":null,"abstract":"<div><div>This study focuses on the critical need for cryogenic thermal energy storage, particularly for liquid air energy storage systems that have recently drawn extensive attention. A novel method integrating a solid particle packed bed with air purification was proposed and validated, wherein the cold storage unit freezes moisture and carbon dioxide in the ambient air to enhance the overall energy and material efficiency of the system. Parametric numerical analysis was performed to examine the dynamic characteristics of the novel thermal storage with particle diameters varying across a wide range of 8–150 mm. The freezing regions of water and CO₂ in thermal storage and their influence on energy storage performance were analyzed according to temperature profiles in the packed bed. Results showed that smaller particles promote convective heat transfer, but also significantly increase pressure drop. When the particle diameter increased from 8 mm to 80 mm, the pressure drop in the cold storage decreased by 79.5 %. With constant cold storage demand in each cycle, the height of the packed bed with 80 mm particles increased by 62.4 % compared to the 8 mm configuration. Economic analysis showed that the construction cost of the packed bed increases with particle diameter, while the operational cost decreases. For packed beds with 20 mm and 80 mm particles, the cost-equilibrium period is 4.8 years. This research provides a theoretical basis for particle size optimization of cold storage and a high-efficiency alternative option for the design of cryogenic energy storage.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"140 ","pages":"Article 119102"},"PeriodicalIF":8.9,"publicationDate":"2025-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145365951","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}

引用次数: 0

Polyimide-based covalent organic frameworks with dual redox-active centers as a high-performance anode for lithium-ion batteries 具有双氧化还原活性中心的聚酰亚胺基共价有机骨架作为锂离子电池的高性能阳极

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2025-10-25 DOI: 10.1016/j.est.2025.119026

Jiahao Wu , Qian Cui , Yinjie Kuang , Liubin Song , Yun Zhong , Ziyang Yan

{"title":"Polyimide-based covalent organic frameworks with dual redox-active centers as a high-performance anode for lithium-ion batteries","authors":"Jiahao Wu , Qian Cui , Yinjie Kuang , Liubin Song , Yun Zhong , Ziyang Yan","doi":"10.1016/j.est.2025.119026","DOIUrl":"10.1016/j.est.2025.119026","url":null,"abstract":"<div><div>Organic materials have become emerging electrode materials for lithium-ion batteries due to their high capacity, sustainability and molecular tunability. However, their commercial application faces bottlenecks such as insufficient conductivity and potential dissolution in organic electrolytes. Here, a polyimide-based covalent organic framework (TA-NTCDA) containing dual-redox active sites was synthesized by using melamine and 1,4,5,8-naphthalenetetracarboxylic anhydride as monomers. The π-conjugated structure of TA-NTCDA not only accelerates charge transfer, but also inhibits its dissolution in organic electrolytes. The abundant carbonyl and triazine units in TA-NTCDA provide a large number of active sites for the deionization/intercalation of lithium ions, which can effectively increase the theoretical specific capacity. As the anode of lithium-ion batteries, TA-NTCDA demonstrated high capacity and long cycle stability, with a specific capacity of 1283 mAh·g<sup>−1</sup> after 250 cycles at a current density of 0.25 A·g<sup>−1</sup>. Even at a high current density of 2.5 A·g<sup>−1</sup>, the TA-NTCDA electrode still exhibited excellent stability. Its capacity reached a peak of 860 mAh·g<sup>−1</sup> after 300 cycles and was still able to maintain a high level of 634 mAh·g<sup>−1</sup> after 600 cycles. In addition, theoretical calculations revealed the applicability of TA-NTCDA as an anode material and the binding ability of different active sites to lithium ions. This study provides an effective strategy for the design of high-performance polyimide-based electrode materials.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"140 ","pages":"Article 119026"},"PeriodicalIF":8.9,"publicationDate":"2025-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145365877","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}

引用次数: 0

Predicting supercooling of water for large-scale volumes using differential scanning calorimetry data 用差示扫描量热数据预测大体积水的过冷性

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2025-10-24 DOI: 10.1016/j.est.2025.119122

Jawad Rabbi, José Lara Cruz, Jean-Pierre Bédécarrats

{"title":"Predicting supercooling of water for large-scale volumes using differential scanning calorimetry data","authors":"Jawad Rabbi, José Lara Cruz, Jean-Pierre Bédécarrats","doi":"10.1016/j.est.2025.119122","DOIUrl":"10.1016/j.est.2025.119122","url":null,"abstract":"<div><div>Thermal energy storages (TES) have become essential to the renewable energy ecosystem, tackling the intermittent nature of renewable energy sources and enhancing energy efficiency. This makes TES a cornerstone for decarbonization and energy optimization. Phase change materials (PCMs) are a fundamental element of a latent heat TES system, which provides a higher energy storage density than sensible heat storages. However, the supercooling (delay in the crystallization) of PCMs is a crucial factor to consider when developing a latent heat TES. Due to its considerable volume dependence, supercooling that is characterized at the laboratory scale cannot be applied to large-scale TES systems. Designing a reliable and effective TES system becomes highly challenging if the degree of supercooling corresponding to the system's volume is not precisely predicted. In this work, a statistical model is developed using Differential scanning calorimetry (DSC) data to predict the degree of supercooling for larger volumes. DSC is used to obtain supercooling experimental data for two distinct volumes and cooling rates for type 2 pure water. From these data, an extrapolation is made using a statistical model, and the model's predictions are validated by comparing them with experimental supercooling results for type 2 pure water at two larger volumes (3 mL and 500 mL). The model demonstrated high accuracy, with errors of 0.82 % and 5.36 % for 3 mL and 500 mL volumes at a cooling rate of 1 °C/min, respectively. Finally, data analysis was conducted on the DSC results to establish an optimal protocol by determining the minimum number of DSC experiments to accurately predict the degree of supercooling. In this study, the minimum number of total combined samples is found to be 40, and the minimum number of cycles (repetitions) is found to be 6 for each sample.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"140 ","pages":"Article 119122"},"PeriodicalIF":8.9,"publicationDate":"2025-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145339787","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}

引用次数: 0

A comprehensive assessment of the design, materials and fluids for high-temperature solid sensible thermal energy storage in a power-to-heat-to-power cycle 全面评估了在电-热-电循环中用于高温固体感热储能的设计、材料和流体

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2025-10-24 DOI: 10.1016/j.est.2025.118758

Malini Bangalore Mohankumar , Sebastian Unger , Alexandre Florian Guille-Bourdas , Uwe Hampel

{"title":"A comprehensive assessment of the design, materials and fluids for high-temperature solid sensible thermal energy storage in a power-to-heat-to-power cycle","authors":"Malini Bangalore Mohankumar , Sebastian Unger , Alexandre Florian Guille-Bourdas , Uwe Hampel","doi":"10.1016/j.est.2025.118758","DOIUrl":"10.1016/j.est.2025.118758","url":null,"abstract":"<div><div>This study investigates the performance of a Solid Sensible Thermal Energy Storage (SSTES) system designed to operate at 10 MWth for over 5 h at a temperature of up to 1000 °C. The stored energy is converted back to electricity using a supercritical carbon dioxide (sCO<sub>2</sub>) power cycle, resulting in a power-to-heat-to-power cycle. The study examines storage materials such as firebricks (FB), industrial by-products such as aluminium oxide ceramic (<em>Al</em>), and asbestos-containing waste (ACW), arranged in various structural configurations within the SSTES container. Inert gases such as argon (Ar), helium (He), carbon dioxide (CO<sub>2</sub>) and nitrogen (N<sub>2</sub>) have been considered as heat transfer fluids (HTFs). For such a system we studied the heat transfer performance as a function of geometry, flow rate, heat transfer surface area, and solid material configuration in the storage container using numerical simulations with a 1D heat transfer model.</div><div>The results show, that CO<sub>2</sub> and N<sub>2</sub> in the CES configuration exhibit the highest charging efficiency, reaching up to 90 %, while He had the shortest charging time but lower efficiency. The rod bundle structure design achieved the highest discharge efficiency, particularly with Ar as HTF, with efficiencies above 70 % for firebricks and aluminium oxide ceramic as heat storage material. Overall, the combined charge and discharge efficiencies reveal that CO<sub>2</sub>, N<sub>2</sub> and Ar performed best with efficiencies above 83 % for Firebricks and aluminium oxide ceramic materials across different configurations. In the channel grooved structure, the bypass zones are minimized, the heat transfer surface area is maximized and the efficiency is high.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"140 ","pages":"Article 118758"},"PeriodicalIF":8.9,"publicationDate":"2025-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145365879","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}

引用次数: 0

Synergistic structural contribution of Co and V doping in nanostructured MoS2 on its electrochemical performance as a supercapacitor electrode 纳米二硫化钼中Co和V掺杂对其作为超级电容器电极的电化学性能的协同结构贡献

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2025-10-24 DOI: 10.1016/j.est.2025.119022

Mennatullah A. Ghaleb , Rabab M. El-Sherif , Khaled Faisal Qasim , M.M. El-Desoky

{"title":"Synergistic structural contribution of Co and V doping in nanostructured MoS2 on its electrochemical performance as a supercapacitor electrode","authors":"Mennatullah A. Ghaleb , Rabab M. El-Sherif , Khaled Faisal Qasim , M.M. El-Desoky","doi":"10.1016/j.est.2025.119022","DOIUrl":"10.1016/j.est.2025.119022","url":null,"abstract":"<div><div>Molybdenum disulfide (MoS<sub>2</sub>) exhibits intrinsically low electrical conductivity and a tendency to restack, which restrict its effectiveness as an electrode material for energy storage applications. To overcome these challenges, pristine MoS<sub>2</sub> along with its Co- and V-doped derivatives were synthesized via a simple co-precipitation method. The characteristic hexagonal phase remained intact, as confirmed by X-ray diffraction analysis (XRD), while X-ray photoelectron spectroscopy (XPS) revealed stable Mo<sup>4+</sup> and S<sup>2−</sup> oxidation states and successful incorporation of Co<sup>2+</sup> and V<sup>5+</sup> ions. Further characterizations employing Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX), Transmission electron microscope (TEM), and Brunauer–Emmett–Teller (BET) techniques confirmed the presence of active functional groups, clear surface morphology, elemental composition, and surface properties of the material. Electrochemical evaluation in 1 M KOH using Cyclic voltammetry (CV), Galvanostatic charge–discharge (GCD), and Electrochemical impedance spectroscopy (EIS) showed enhanced pseudocapacitive behavior. V- MoS<sub>2</sub> achieved the best performance, with a specific capacitance of 900.3 F/g, corresponding energy density of 107.5 Wh·kg<sup>−1</sup>, and 87.2 % retention after 5000 cycles, attributed to interlayer expansion and defect engineering. These findings demonstrate the effectiveness of transition metal incorporation in optimizing MoS<sub>2</sub>-based electrodes for advanced supercapacitor systems.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"140 ","pages":"Article 119022"},"PeriodicalIF":8.9,"publicationDate":"2025-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145365974","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}

引用次数: 0

Dual-functional electrochromic supercapacitor with black-to-transmissive switching and reliable specific capacitance evaluation 双功能电致变色超级电容器，具有黑透切换和可靠的比电容评估

IF 8.9 2区工程技术

Journal of energy storage Pub Date : 2025-10-24 DOI: 10.1016/j.est.2025.119099

Jin Li , Wanting Yang , Jiaqian Kang , Xiaojing Lv , Jiehao Dong , Minao Xia , Juncheng Dong , Mi Ouyang , Ru Bai , Cheng Zhang

{"title":"Dual-functional electrochromic supercapacitor with black-to-transmissive switching and reliable specific capacitance evaluation","authors":"Jin Li , Wanting Yang , Jiaqian Kang , Xiaojing Lv , Jiehao Dong , Minao Xia , Juncheng Dong , Mi Ouyang , Ru Bai , Cheng Zhang","doi":"10.1016/j.est.2025.119099","DOIUrl":"10.1016/j.est.2025.119099","url":null,"abstract":"<div><div>High-performance electrochromic supercapacitors require synchronous optimization of optical modulation and energy storage. Herein, a blending polymer film (Pr/Pc) was developed through the physical integration of complementary polymers, which generates a synergistic interaction that enhances charge injection and enables high intrinsic capacitance. Interestingly, the mass of the Pr/Pc film was calculated using mass-absorbance estimation methods based on the Lambert-Beer law and the film achieves a mass specific capacitance of 218.8 F‧g<sup>−1</sup> and an area specific capacitance of 10.8 mF‧cm<sup>−2</sup>. Meanwhile, the Pr/Pc film exhibits reversible black-to-transparent switching with exceptional electrochromic properties. Based on this, an electrochromic supercapacitor prototype device assembled with a Pr/Pc film as the active layer exhibits a mass specific capacitance of 78.8 F‧g<sup>−1</sup>, a coulombic efficiency of near 100 %, and excellent charging/discharging stability. In addition, the device is capable of switching between black-to-transmissive states with fast switching time and near 100 % optical contrast retention after 500 cycles during charging/discharging.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"140 ","pages":"Article 119099"},"PeriodicalIF":8.9,"publicationDate":"2025-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145365970","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}

引用次数: 0