Journal of Power Sources最新文献

{"title":"Performance promotion of NVO cathodes by regulating interfacial hydrophilicity and ion bonding energy","authors":"Yu Gao ,&nbsp;Sheng Lu ,&nbsp;Chuanwei Zheng ,&nbsp;Wei An ,&nbsp;Haize Yin ,&nbsp;Yiman Liu ,&nbsp;Dongqing Wu ,&nbsp;Han Wang","doi":"10.1016/j.jpowsour.2025.237222","DOIUrl":"10.1016/j.jpowsour.2025.237222","url":null,"abstract":"<div><div>The impact of different binders, polyvinylidene fluoride, polyvinyl alcohol (PVA), and polyethylene oxide, on the electrochemical performance of NH₄V₄O₁₀ (NVO) cathodes in aqueous zinc-ion batteries (AZIBs) is systematically examined in this work. Through a combination of experimental and computational analyses, it is demonstrated that the hydrophilicity of the binders, along with the ionic interactions with Zn²⁺ ions, are critical factors influencing the electrochemical performances of the NVO cathodes. The electrochemical characterization indicates that the NVO cathode with PVA binder (PVA-NVO) achieves a remarkable reversible capacity of 477.9 mAh g⁻¹ at 0.5 A g⁻¹, which is retained as 321.0 mAh g⁻¹ even at a high current density of 10 A g⁻¹. Notably, PVA-NVO reserves 79.7 % of the initial capacity after 3000 charge-discharge cycles at 10 A g⁻¹. These findings highlight the significant role of binders in facilitating ion transport at the interface between NVO and the aqueous electrolyte, providing valuable insights and practical examples for advancing the development of AZIBs with high energy density.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"645 ","pages":"Article 237222"},"PeriodicalIF":8.1,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887449","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":"Hybrid neural network and dynamic decay model for life prediction of solid oxide fuel cell combined heat and power systems","authors":"Yazhou Shi ,&nbsp;Hongxiang Zheng ,&nbsp;Wenchun Jiang ,&nbsp;Ming Song ,&nbsp;Yun Luo ,&nbsp;Xiucheng Zhang ,&nbsp;Shan-Tung Tu","doi":"10.1016/j.jpowsour.2025.237165","DOIUrl":"10.1016/j.jpowsour.2025.237165","url":null,"abstract":"<div><div>The high cost, limited lifespan, poor durability, and low reliability of solid oxide fuel cell (SOFC) combined heat and power systems significantly hinder their widespread adoption in large-scale commercial applications. Additionally, the complex interactions between components within the SOFC system make fault prediction particularly challenging. To address this issue, this study conducts continuous operational tests on two sets of kilowatt-level SOFC systems, collecting performance data. A dynamic response model of the SOFC system is developed on the Simulink platform, systematically analyzing the voltage performance and its dynamic attenuation characteristics. Subsequently, a Kalman filter algorithm is employed to calculate the stack performance attenuation factor (<em>r</em>), which is integrated into the system dynamic model to enable accurate prediction of system-level attenuation. Finally, a neural network model is constructed to effectively capture the performance degradation characteristics of the SOFC system, with a maximum prediction error of 5 %. This hybrid approach, combining the dynamic decay model and the neural network, is used to predict the service life of the SOFC system, with an estimated lifespan of 7750 h for a 40-cell SOFC system. The findings provide an important theoretical foundation and technical support for the optimal design and long-term operation of SOFC systems.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"645 ","pages":"Article 237165"},"PeriodicalIF":8.1,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143882121","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":"Solar-driven hybrid photocatalytic fuel cells for concurrent wastewater treatment and energy generation","authors":"Ceren Orak ,&nbsp;Gülin Ersöz","doi":"10.1016/j.jpowsour.2025.237198","DOIUrl":"10.1016/j.jpowsour.2025.237198","url":null,"abstract":"<div><div>Photocatalytic Fuel Cells (PFCs) present a promising approach for wastewater treatment and sustainable energy generation. This study developes single-cell PFCs and hybrid PFC systems by integrating PFCs with electrocatalytic (ECR) or photoelectrocatalytic reactors (PECR) to treat wastewater and energy generation as concomitant. Solar-driven photoanodes, specifically Fe or Cu-doped g-C₃N₄ (CN), are utilized alongside an air-breathable cathode and a supercapacitor. Characterization study confirms their successful analysis. A supercapacitor provides that PFCs are worked under dark conditions. In single-cell PFC, optimal power density of 0.1794 mW/m² is achieved at pH 12 with a Cu/CN catalyst loading of 2 mg/cm² and 0.25 mM KOH. Hybrid systems exhibits higher power densities, with 0.8704 mW/m² for PFC-ECR and 0.5614 mW/m² for PFC-PECR. The catalyst loading and its interaction with pH are critical in PFC-ECR, while pH alone significantly impacts power density in PFC-PECR. A kinetic study in the PFC-ECR system, conducts at 25, 35, and 45 °C using a Cu/CN photoanode, indicates that the reaction follows a first-order kinetic model.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"645 ","pages":"Article 237198"},"PeriodicalIF":8.1,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887340","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 robust machine learning-based SOC estimation approach for vanadium redox flow battery","authors":"Chengyan Zheng ,&nbsp;Wendong Feng ,&nbsp;Zhongbao Wei ,&nbsp;Yifeng Li ,&nbsp;Herbert Ho Ching Iu ,&nbsp;Tyrone Fernando ,&nbsp;Xinan Zhang","doi":"10.1016/j.jpowsour.2025.237087","DOIUrl":"10.1016/j.jpowsour.2025.237087","url":null,"abstract":"<div><div>The vanadium redox flow battery (VRB) is recognized as an effective large-scale energy storage solution for mitigating the renewable intermittency and ensuring grid reliability. Accurate estimation of the state of charge (SOC) is crucial for the optimal operation of VRB. This paper presents a novel machine learning-based estimation algorithm to overcome the long-lasting problem of model dependency in the existing SOC estimation approaches for VRB. Compared to the conventional model based methods, such as Kalman filter and sliding mode observer, the proposed algorithm does not need any knowledge of the VRB model. In addition, the proposed algorithm employs recurrent equilibrium network (REN), which has “built in” behavioral guarantees of stability and robustness compared to the traditional machine learning algorithms. Furthermore, the proposed algorithm employs the nonlinear direct parameterization technique to substantially simplify the neural network training. Its efficacy is verified by experimental results.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"645 ","pages":"Article 237087"},"PeriodicalIF":8.1,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887448","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":"Necklacelike biomass derived N-doped carbon fibers with encapsulated Sb enable stable potassium-ion storage","authors":"Haoran Liu ,&nbsp;Rui Hou ,&nbsp;Yilin Li ,&nbsp;Junzhi Li ,&nbsp;Guangshe Li ,&nbsp;Zheng Lou ,&nbsp;Dongdong Li ,&nbsp;Wei Han","doi":"10.1016/j.jpowsour.2025.237221","DOIUrl":"10.1016/j.jpowsour.2025.237221","url":null,"abstract":"<div><div>Antimony, as the anode of potassium ion batteries, has a satisfactory theoretical specific capacity (660 mAh g⁻¹). However, the lattice expansion after potassization and insufficient conductivity of antimony hinder the practical application of Antimony based electrodes. A novel synthesis strategy for necklacelike biomass derived carbon fibers linked with MOF encapsulated Sb nanoparticles composite electrode is reported, wherein the unique structure of metal-organic frameworks (MOFs) is utilized to achieve nanoscale confinement and the inherent adsorption properties of fungi are exploited to construct conductive networks. The unique carbon encapsulation of MOF materials effectively controls the size of antimony particles and limits the expansion after potassization. The fixation of one-dimensional carbon fiber can prevent the powdering and shedding of the active materials and improve the cycle life of the composite electrodes. Electrochemical experiments and theoretical calculations show that NCFs@Sb@C anode has good conductivity and fast potassium ion diffusion kinetics. After 400 cycles at 1 A g⁻¹, NCFs@Sb@C still has a high reversible specific capacity of 129.3 mAh g⁻¹, which is significantly better than that of NCFs and Sb@C. In addition, the full cell of NCFs@Sb@C anode matched with PTCDA cathode exhibits good cycling stability, demonstrating the practical application potential of this composite electrode.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"645 ","pages":"Article 237221"},"PeriodicalIF":8.1,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887453","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":"Synergistic engineering of oxygen-doping and sulfur vacancies on VS2 microflower enables reversible multielectron redox reaction for high-performance Mg-based hybrid batteries","authors":"Xu Zhang ,&nbsp;Rui Shi ,&nbsp;Wenjie He ,&nbsp;Yana Liu ,&nbsp;Yunfeng Zhu ,&nbsp;Jiguang Zhang ,&nbsp;Xiaohui Hu ,&nbsp;Jun Wang","doi":"10.1016/j.jpowsour.2025.237214","DOIUrl":"10.1016/j.jpowsour.2025.237214","url":null,"abstract":"<div><div>Vanadium-based materials with multiple valence states are considered as promising cathodes for rechargeable Mg-Li hybrid ion batteries (MLIBs) on account of their high theoretical capacity and unique crystal structure. Nevertheless, it still faces great challenges involving sluggish reaction kinetics and limited redox couples, resulting in unsatisfactory cycle stability and inadequate energy density. Herein, a synergistic engineering strategy of O-doping and sulfur vacancies is rationally designed for the construction of hierarchical VS₂ microflower (denoted as S_v-VS₂-O), serving as a high-performance cathode for MLIBs. The multielectron redox reactions triggered by the multiple valence states of V endow the S_v-VS₂-O with enhanced redox voltage, delivering great superiority in reversible capacity (292.6 mAh g⁻¹ at 50 mA g⁻¹) and energy density (323.9 Wh kg⁻¹). Systematic theoretical calculations together with electrochemical results reveal that the synergistic benefits of O-doping and sulfur vacancies simultaneously improve ion adsorption ability, facilitate rapid charge transfer, and lower ion migration barrier, thereby achieving the optimization of reaction reversibility and kinetics. Additionally, the buffering effect of microflower structure with sufficient space on volume changes promotes cycling stability. Consequently, these features ensure the S_v-VS₂-O cathode with exceptional long cycle lifespan (98.6 % capacity retention after 2000 cycles at 2000 mA g⁻¹). To verify practical applicability, the assembled pouch-type cell maintains a relatively good cycling stability for 120 cycles. This work highlights the importance of an appealing synergistic strategy of doping and vacancy engineering for achieving multielectron redox reactions of advanced cathodes for metal-ions batteries.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"645 ","pages":"Article 237214"},"PeriodicalIF":8.1,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887456","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":"Mesoporous carbon/silicon composites via template-free method for lithium-ion battery anodes","authors":"Duo Wang ,&nbsp;Aimin Liu ,&nbsp;Ting-Ting Wang ,&nbsp;Haitao Huang ,&nbsp;Yubao Liu ,&nbsp;Zhongning Shi","doi":"10.1016/j.jpowsour.2025.237075","DOIUrl":"10.1016/j.jpowsour.2025.237075","url":null,"abstract":"<div><div>Silicon-carbon composite anodes have exhibited outstanding electrochemical performance. The exploration of efficient, cost-effective, and high-performance synthesis methods has become a critical foundation for their commercialization. However, the complex and diverse carbon skeleton makes the exploration process difficult. Herein, mesoporous carbon/silicon composites were synthesized without a template through liquid-phase solidification, and the relationship between the energy storage performance and the carbon skeleton morphology was investigated through experimental characterization and density functional theory (DFT) calculation. The results show that the morphology of three-dimensional interconnected pores is a preferred configuration, and the size and volume of pores are critical factors influencing the electrochemical performance. The DFT calculations elucidate the structural advantages of porous carbon materials by analyzing the work function, defect formation energy, and charge density difference. The zl-C/Si sample (zinc lactate) with three-dimensional interconnected pores exhibits the optimum resistance (32.6 <span><math><mi>Ω</mi></math></span>) and diffusion coefficient (3.14 × 10⁻¹² cm² s⁻¹), corresponding to the highest ion and electron diffusion rate. The as-synthesized anode delivers a high initial discharge capacity of 2303 mAh g⁻¹ when the current density is set at 0.1 A g⁻¹. Even at 1 A g⁻¹, it can still maintain a capacity of 879 mAh g⁻¹ over 100 cycles, with 93% capacity retention. This study may offer novel insights into the commercialization process of silicon-carbon anodes.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"645 ","pages":"Article 237075"},"PeriodicalIF":8.1,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887452","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":"Boosting electrochemical performances of lithium sulfur battery via rational design and fabrication engineering of cobalt boride-based core-shell structure composite as a multifunctional sulfur host","authors":"Xueli Yan ,&nbsp;Ying Zhang ,&nbsp;Yutao Dong ,&nbsp;Mengmeng Zhu ,&nbsp;Shixian Xu ,&nbsp;Yiming Song ,&nbsp;Yumiao Han ,&nbsp;Zihao Cheng ,&nbsp;Jianmin Zhang","doi":"10.1016/j.jpowsour.2025.237223","DOIUrl":"10.1016/j.jpowsour.2025.237223","url":null,"abstract":"<div><div>Lithium-sulfur (Li-S) batteries possess high theoretical energy density (2600 Wh kg⁻¹), but face some issues such as polysulfide shuttle and lithium dendrite growth. Transition metal borides (TMBs) are promising materials in which both metal and boron atoms act as active sites, enhancing the binding with lithium polysulfides (LiPSs) and facilitating LiPSs conversion reactions. Here, we ingeniously integrate carbon materials with polar TMBs to synthesize a CoB/NCCS composite which features a nitrogen-doped conductive carbon shell (NCCS) and a cobalt boride (CoB) core, via co-precipitation synthesis of ZIF-67, dopamine polymerization on ZIF-67, boronization process and pyrolysis treatment. As a result, the Li-S battery with CoB/NCCS as the sulfur host achieves impressive discharge specific capacities of 1606.3, 1143.0, 1001.8, 946.2, and 727.0 mAh g⁻¹ at 0.1, 0.2, 0.5, 1 and 2C, respectively. Additionally, the electrode also exhibits a remarkably low capacity decay rate of 0.05 % per cycle over 1000 cycles at a high current density of 5C, supporting the stable cycling characteristic. This work not only demonstrates that the CoB/NCCS composite is an extraordinary sulfur host material, but also provides an effective strategy to improve the electrochemical performances of metal borides by rational design and fabrication engineering.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"645 ","pages":"Article 237223"},"PeriodicalIF":8.1,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887457","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":"Chemisorption-catalysis synergy driven VN-V2O3 anchored on reduced graphene oxide heterostructure for stable lithium-sulfur battery separators","authors":"Jiahao Hou,&nbsp;Mingzhi Yang,&nbsp;Xunli Guo,&nbsp;Hongyun Li,&nbsp;Zhewen Liu,&nbsp;Yuheng Cui,&nbsp;Dong Shi,&nbsp;Haixiao Hu,&nbsp;Baoguo Zhang,&nbsp;Yongliang Shao,&nbsp;Yongzhong Wu,&nbsp;Xiaopeng Hao","doi":"10.1016/j.jpowsour.2025.237197","DOIUrl":"10.1016/j.jpowsour.2025.237197","url":null,"abstract":"<div><div>The poor electrical conductivity of sulfur, volume expansion and shuttle effect during charging and discharging are the main reasons affecting the commercialization of lithium-sulfur batteries (LSBs) at present. In this paper, a heterostructured vanadium nitride-vanadium(III) oxide anchored on reduced graphene oxide composite (VN-V₂O₃@rGO) is developed as a modified multifunctional separator for LSBs. The VN-V₂O₃@rGO material not only enhances electrical conductivity but also effectively accelerates reaction kinetics and suppresses the shuttle effect through strong chemical adsorption and catalytic conversion of lithium polysulfides (LiPSs). When applied as a coating on a commercial separator, the VN-V₂O₃@rGO modified cell delivers an initial discharge capacity of 1174.6 mAh g⁻¹ at 2.0C and maintains a capacity of 685.1 mAh g⁻¹ after 1000 cycles with an average capacity degradation of only 0.05 % per cycle. This work demonstrates the potential of metal nitride-metal oxide heterostructures in designing high-performance LSBs and provides a feasible strategy for developing advanced battery separators.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"645 ","pages":"Article 237197"},"PeriodicalIF":8.1,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887451","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":"Synergistically immobilize phosphoric acid on core-shell metal pyrophosphate in the catalytic layer for fuel cells at 240 °C","authors":"Jiale Wang,&nbsp;Baohua Liu,&nbsp;Xin Wang,&nbsp;Shanfu Lu,&nbsp;Yan Xiang,&nbsp;Jin Zhang","doi":"10.1016/j.jpowsour.2025.237178","DOIUrl":"10.1016/j.jpowsour.2025.237178","url":null,"abstract":"<div><div>Evaporation and dehydration of phosphoric acid (PA) in the catalytic layer at elevated temperature pose significant challenges to the performance of high-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) at temperature above 200 °C. In this work, core-shell metal pyrophosphates (c-MP₂O₇, M = Ti, Zr and Sn) have been employed to immobilize PA in the cathode of HT-PEMFCs to improve their performance at temperature up to 240 °C. It reveals that precursors, composition and content of the c-MP₂O₇ play vital roles on the performance of catalytic layers. Compared to the direct addition of metal oxides into the catalytic layer with severe consumption of PA, the incorporation of metal pyrophosphates immobilizes PA on the surface of c-MP₂O₇ as a gel outer layer. This strategy creates an extensive proton diffusion network among the c-MP₂O₇ particles, leading to improved proton conductivity and cell performance. An HT-PEMFC with optimized content of c-SnP₂O₇ (11.6 wt%) in the catalytic layer achieves a remarkable peak power density of 462 mW cm⁻² at 240 °C, accompanied by an increased voltage rate of 0.15 mV h⁻¹ sustained over 35 h at 240 °C and constant load of 0.2 A cm⁻². These results demonstrate a significant milestone in the advancement of HT-PEMFC technology.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"645 ","pages":"Article 237178"},"PeriodicalIF":8.1,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143879286","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}