Journal of Power Sources最新文献

{"title":"Nitrogen self-doped porous carbon material derived from aluminum-based metal-organic framework for symmetric supercapacitor","authors":"Xingyao Li,&nbsp;Ruijie Xu,&nbsp;Beili Wang,&nbsp;Zhen Lu ,&nbsp;Xiaolun Peng,&nbsp;Yazhen Wang","doi":"10.1016/j.jpowsour.2026.239559","DOIUrl":"10.1016/j.jpowsour.2026.239559","url":null,"abstract":"<div><div>Metal-organic framework materials (MOFs), featuring high porosity and large specific surface area, are considered as promising precursors for fabricating porous carbon materials. Here, nitrogen self-doped porous carbon materials derived from aluminum-based metal-organic framework (Al-MOF) are successfully prepared via one-step annealing method under different temperatures and durations. The impacts of carbonization temperature and time on the structure and electrochemical performance of porous carbon materials are systematically investigated. Notably, the as-prepared porous carbon materials exhibit an amorphous graphitic structure with a large specific surface area and hierarchical pore system. Among all samples, NC-900-5 (carbonized at 900 °C for 5 h) demonstrates exceptional electrochemical performance: it delivers a high specific capacitance of 224 F/g at a current density of 0.5 A/g and maintains an outstanding cycling stability with 90.4 % capacitance retention after 30000 charge-discharge cycles at 15 A/g. More importantly, the symmetric supercapacitor assembled with NC-900-5 achieves a high energy density of 11.4 Wh/kg in a 6 M KOH electrolyte. This work provides a foundation for the subsequent development of high-performance electrode materials.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"671 ","pages":"Article 239559"},"PeriodicalIF":7.9,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135672","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":"Deciphering phase-dependent growth behavior of ruthenium species on MoS2 for alkaline hydrogen evolution reaction","authors":"Yi Zhang ,&nbsp;Zeyu Zhang ,&nbsp;Siyu Deng ,&nbsp;Junyu Wang ,&nbsp;Haoqiang Wu ,&nbsp;Jingxiang Zhou ,&nbsp;He Huang ,&nbsp;Xucai Kan","doi":"10.1016/j.jpowsour.2026.239618","DOIUrl":"10.1016/j.jpowsour.2026.239618","url":null,"abstract":"<div><div>The crystal phase of transition-metal dichalcogenides (TMDs) determines their physicochemical and catalytic properties. Regulating MoS₂ phase evolution via metal doping is key to optimizing Pt-free alkaline hydrogen evolution reaction (HER) electrocatalysts. Herein, we systematically study how nominal Ru loading (wt%) affects 1T/2H-MoS₂ phase stability and Ru growth behavior via one-step hydrothermal synthesis, using XRD, Raman, XPS, HRTEM, EDS, ICP-AES, and density functional theory (DFT). Key results: (1) 1T-MoS₂ remains structurally stable with rising nominal Ru loading, while 2H-MoS₂ undergoes gradual 2H→1T transition when nominal Ru &gt; 0.156 wt% (semi-quantified via XRD/Raman ratios); (2) Ru disperses uniformly (Ru²⁺) on 1T-MoS₂ but enriches regionally (Ru⁰) on 2H-MoS₂, showing phase-dependent growth; (3) In 1 M KOH, Ru_0.291 wt%-1T-MoS₂ and Ru_0.346 wt%-2H-MoS₂ (based on ICP-AES) exhibit η_-10 (overpotential at −10 mA cm⁻²) of 72 mV and 74 mV, Tafel slopes of 48.28 and 56.93 mV dec⁻¹, with Ru_0.351 wt%-2H stable for 6 h. DFT (Ru loading matched ICP: 0.29-0.35 wt%) reveals Ru-induced Mo-S bond elongation drives 2H→1T transition. This work offers a MoS₂ phase regulation strategy via metal loading, guiding cost-effective alkaline HER catalyst design.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"671 ","pages":"Article 239618"},"PeriodicalIF":7.9,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186585","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":"Development of flat-tubular solid oxide fuel cells via mold casting","authors":"Cigdem Timurkutluk ,&nbsp;Keremhan Bilgil ,&nbsp;Sezer Onbilgin ,&nbsp;Bora Timurkutluk","doi":"10.1016/j.jpowsour.2026.239610","DOIUrl":"10.1016/j.jpowsour.2026.239610","url":null,"abstract":"<div><div>The flat-tubular solid oxide fuel cell (SOFC) configuration provides a balanced combination of thermal stability and compact design by integrating key features of planar and tubular cells. This study presents a cost-effective and versatile fabrication strategy for producing flat-tubular SOFC anode supports using 3D-printed mold, offering a practical alternative to conventional extrusion. The fabrication procedure, including mold design, anode support forming, and full cell assembly, is systematically demonstrated. The electrochemical performance of the cell is evaluated, revealing a promising peak power density of 0.350 Wcm⁻² at 800 °C under a hydrogen flow rate of 1 NLmin⁻¹, an air flow rate of 2NLmin⁻¹ and applied compression pressure of 3 bar. The cell also demonstrates reasonable short-term, thermal cycling and redox stability. Additionally, a patterned anode support is successfully fabricated using a mold with dimple-based surface features, resulting in corresponding pillar-like structures on the support, which confirms the high geometric fidelity and tunability of the proposed method. A patterned flat-tubular cell is constructed on this support. The patterned cell exhibits a maximum power density of 0.379 Wcm⁻² at 800 °C. Therefore, the obtained results demonstrate the potential of the proposed approach for fabricating both conventional and patterned flat-tubular anode supports for SOFCs.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"671 ","pages":"Article 239610"},"PeriodicalIF":7.9,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186592","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":"Cobalt-free nickel-rich NMA cathodes: Advances, challenges, and prospects for high-energy lithium-ion batteries: A review","authors":"Fadila EL Kouihen,&nbsp;Mohamed Chakir,&nbsp;Abdessamad Faik","doi":"10.1016/j.jpowsour.2026.239601","DOIUrl":"10.1016/j.jpowsour.2026.239601","url":null,"abstract":"<div><div>Lithium-ion batteries (LIBs) are critical for enabling clean energy technologies, particularly in the context of the growing demand for electric vehicles (EVs) and portable electronics. However, the widespread use of cobalt-based cathodes presents major challenges due to cobalt's high cost, toxicity, and supply chain issues. As a result, significant research efforts have shifted toward developing cobalt-free cathode materials that can maintain or exceed the performance of conventional materials. This review focuses on the recent advances in cobalt-free, nickel-rich cathode materials, with particular emphasis on NMA compositions. We provide a comprehensive overview of synthesis strategies, compositional and structural optimizations, and performance improving surface modification techniques. Key challenges such as phase stability, cycling degradation, and high-voltage safety concerns are critically examined. Additionally, this review paper highlights advanced characterization approaches and integration challenges with next-generation electrolytes. Importantly, this paper is the first review to comprehensively investigate the integration of NMA cathodes with various electrolytes and assess their full-cell performance, offering new insights into interfacial compatibility, practical implementation, and future research directions for the development and industrialization of cobalt-free NMA cathodes in high-performance LIBs.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"671 ","pages":"Article 239601"},"PeriodicalIF":7.9,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186599","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":"Integrated simulation of Li2AgBiBr6 solar harvesters: Device-level engineering and module-level forecasting","authors":"Ashraful Mujahid ,&nbsp;Md. Hasan Mia ,&nbsp;Omar Alsalmi ,&nbsp;Md. Zahid Hasan","doi":"10.1016/j.jpowsour.2026.239573","DOIUrl":"10.1016/j.jpowsour.2026.239573","url":null,"abstract":"<div><div>This work delivers an extensive numerical study of lithium-based double perovskite Li₂AgBiBr₆, employing SCAPS-1D and PVsyst to refine device layering and improve photovoltaic outputs. Because double perovskite solar cells (DPSCs) free of lead are becoming promising, environmentally responsible replacements for traditional lead-halide photovoltaic technologies. At first, six electron transport layers (ETLs: WS₂, ZnO, PCBM, SnS₂, IGZO, C₆₀) were systematically combined with ten-hole transport layers (HTLs: CBTS, Cu₂O, CuSCN, Cu₂Te, CuI, MoS₂, PEDOT:PSS, GaAs, P₃HT, CFTS) to produce 60 distinct device stacks, which were assessed through parametric optimization. Additionally, three front metal contacts (Al, Ag, Cu) and nine back contacts (Cu, Fe, C, Au, W, Ni, Pd, Pt, Se) were studied to quantify contact effects on device behavior. The best-performing architecture that WS₂ as ETL with CBTS as HTL, which yielded a PCE of 21.42%, with V_OC = 0.9318 V, J_SC = 25.4175 mA cm⁻², and FF = 86.946%, meanwhile with ZnO, PCBM, SnS₂, IGZO and C₆₀ based cell yielded PCE of 21.33%, 20.84%, 20.46%, 19.23% and 17.9%, respectively. We further investigated sensitivity to series and shunt resistances (R_s, R_sh), operational temperature, recombination/generation profiles, J-V and QE responses, capacitance, Mott–Schottky trends, Nyquist-Bode, and CF analysis. Optimized cell metrics were transferred into PVsyst for module-level evaluation under realistic environmental conditions; among the ETL variants, the WS₂-based 72-cell module produced the highest peak power of 465.86W with output current of 5.83A at the cell temperature 45^oC and irradiance 1000W.m⁻². The combined SCAPS-1D with PVsyst workflow provides a practical route to project cell-scale improvements into module-scale energy performance.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"671 ","pages":"Article 239573"},"PeriodicalIF":7.9,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187040","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":"Ultra-high capacitance retention of Co3V2O8 with assembled rose-like hierarchical structure","authors":"Lirong Jia ,&nbsp;Yuanyuan Li ,&nbsp;Zhenyuan Xiao ,&nbsp;Wanyong Zhou ,&nbsp;Hui Chai ,&nbsp;Xiaogang Zhang","doi":"10.1016/j.jpowsour.2026.239522","DOIUrl":"10.1016/j.jpowsour.2026.239522","url":null,"abstract":"<div><div>As a pivotal energy storage device, supercapacitors have witnessed tremendous progress in the past decade, and design of specific nanostructures is a prominent topic of interest. In this work, an efficient single-step solvothermal synthesis approach is utilized for the preparation of rose-like hierarchical Co₃V₂O₈ structure with ultra-high capacitance retention. Electrochemical characterization in 2 M KOH electrolyte revealed outstanding performance of the Co₃V₂O₈ sample: when the current density is measured at 10 A g⁻¹, 100 % capacity of the sample is maintained after 10,000 cycles. Furthermore, an aqueous asymmetric supercapacitor (ASC) constructed with the as-prepared sample can achieve the voltage window of 1.6 V and still provide 100% capacity retention after 10,000 cycles. These analytical results indicate that the assembled rose-like hierarchical structure of Co₃V₂O₈ plays a critical role in enhancing electrochemical durability, particularly through improved structural stability and efficient charge transport pathways.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"671 ","pages":"Article 239522"},"PeriodicalIF":7.9,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187047","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":"State of charge estimation for cylindrical lithium-ion batteries based on an ultrasonic multi-feature segmentation model","authors":"Jun Han ,&nbsp;Shijun Lin ,&nbsp;Xinghua Jiang ,&nbsp;Zhenyuan Zeng ,&nbsp;Mengjuan Xi ,&nbsp;Jinhuan Long","doi":"10.1016/j.jpowsour.2026.239595","DOIUrl":"10.1016/j.jpowsour.2026.239595","url":null,"abstract":"<div><div>Accurate state-of-charge (SOC) estimation is critical for battery management, and while ultrasonic analysis offers a promising non-invasive solution, its effectiveness on cylindrical batteries is severely compromised by the battery's complex physical architecture. Unlike electrical signals, ultrasonic interactions with the internal jelly-roll structure result in non-monotonic, regime-dependent features that single-model estimators fail to resolve. To overcome this structure-induced acoustic limitation, this paper proposes a novel regime-aware segmented framework. This stratification effectively decouples the complex global mapping into homogeneous sub-problems, which are then precisely modeled by regime-specific Long Short-Term Memory (LSTM) networks. The core innovation lies in using regime-aware modeling to mitigate signal complexity induced by the jelly-roll structure. Experiments validate that this architecture significantly enhances robustness against operating variability. At 25 °C, the model achieves a root-mean-squared error (RMSE) of 1.34% (1C), and crucially maintains high accuracy (RMSE = 3.92%) even under challenging low-temperature conditions (10 °C), where baseline models collapse due to viscoelastic damping. This work provides a robust, mechanism-informed solution for non-destructive monitoring under diverse operating conditions.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"671 ","pages":"Article 239595"},"PeriodicalIF":7.9,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146186983","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":"Observing electrolyte motion in commercial cylindrical Li-ion cells using ultrasound imaging","authors":"Tobias Röhmel ,&nbsp;Morian Sonnet ,&nbsp;Gereon Stahl ,&nbsp;Duc Minh Nguyen ,&nbsp;Tim Falkenstein ,&nbsp;Dirk Uwe Sauer","doi":"10.1016/j.jpowsour.2026.239455","DOIUrl":"10.1016/j.jpowsour.2026.239455","url":null,"abstract":"<div><div>Cylindrical Li-ion cells, increasingly adopted in electric vehicles, pose geometry-driven challenges for scanning acoustic microscopy (SAM). While SAM for flat cell formats is well established, spatial ultrasound imaging of cylindrical cells is under explored. We present a compact rotational ultrasound scanner that leverages cylindrical symmetry to generate two-dimensional angle–height images in both through-transmission and reflection using two opposing single-element transducers. To our knowledge, this is the first rotational ultrasound system that provides through-transmission imaging of cylindrical Li-ion cells and the first single-element reflection images that can be directly linked to large-scale internal structures such as current collector tabs. Early-time gating of the first arrival (through) and late gating of the first front-wall echo (reflection) suppresses circumferential and creeping waves, restoring interpretable contrast.</div><div>We validate the platform on aluminum reference dummies and demonstrate spatial imaging on three 26650 cells. The scanner produces interpretable angle–height maps in through-transmission and reflection that localize tabs, reveal orientation- and state-of-charge dependent electrolyte redistribution, and highlight stable attenuation features linked to internal mechanical conditions. Co-registration with X-ray CT provides a common angular frame and anchors acoustic contrasts in the underlying structure, establishing ultrasound as a practical complement to existing battery Non-destructive testing (NDT).</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"671 ","pages":"Article 239455"},"PeriodicalIF":7.9,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135645","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":"Designing glass sealants for intermediate- and low-temperature solid oxide fuel cells: challenges and prospects","authors":"K. Singh,&nbsp;Paramvir Kaur,&nbsp;Satwinder Singh Danewalia","doi":"10.1016/j.jpowsour.2026.239579","DOIUrl":"10.1016/j.jpowsour.2026.239579","url":null,"abstract":"<div><div>Glass sealants are indispensable for commercialising the energy-efficient and environmentally friendly planar design of solid oxide fuel/electrolyser cells (SOFC/SOECs). Mostly, alkaline-earth-modified aluminosilicate and aluminoborosilicate glass systems are standard and state-of-the-art glass sealants for high-temperature (HT) SOFCs (700-1000 °C). For intermediate-temperature (IT) and low-temperature (LT) SOFC operation, glass systems such as silicate-, borosilicate-, and phosphate-based glasses have been explored. Borosilicate-based sealants exhibit tunable thermal expansion and a lower characteristic temperature with poor stability in reducing oxygen partial pressure than silicate-based glasses. On the other hand, phosphate-based glasses offer lower sealing temperatures but often exhibit limited chemical durability and thermal stability. Thus, an appropriate glass sealant is still required for IT/LT-SOFCs, which should be compatible with the new set of materials to lower SOFC operating temperatures. Thus, designing suitable glass compositions for IT/LT-SOFCs poses several challenges, owing to the simultaneous requirements of compatibility with various SOFC components, fundamental constraints in optimising glass properties, and stability issues during long-term thermochemical cycles during operation. This perspective presents challenges and prospects for developing new sealant materials for IT/LT-SOFC, along with the background and required properties for glass sealants.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"671 ","pages":"Article 239579"},"PeriodicalIF":7.9,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135648","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":"Trimetallic WFeMoB cotton cloud electrocatalyst for efficient electrochemical water splitting under harsh industrial conditions","authors":"Md Najibullah,&nbsp;Mehedi Hasan Joni,&nbsp;Sumiya Akter Dristy,&nbsp;Md Ahasan Habib,&nbsp;Jihoon Lee","doi":"10.1016/j.jpowsour.2026.239576","DOIUrl":"10.1016/j.jpowsour.2026.239576","url":null,"abstract":"<div><div>Green hydrogen offers a sustainable pathway to meet global energy demand while reducing carbon emissions. However, its scalable production requires robust electrocatalyst derived from earth-abundant elements. In this work, a trimetallic WFeMoB cotton cloud (CC) electrocatalyst synthesized via a single-step hydrothermal approach is reported, exhibiting exceptional catalytic activity and durability under harsh industrial conditions. The WFeMoB CC achieves low overpotentials of 197 mV for the oxygen evolution reaction (OER) and 332 mV for the hydrogen evolution reaction (HER) at 300 mA/cm². The bifunctional cell of WFeMoB⁽⁻⁾ || WFeMoB⁽⁺⁾ achieves a low cell voltage of 2.78 V at high current density of 2000 mA/cm² in 1 M KOH, outperforming the benchmark system of Pt/C⁽⁻⁾ || RuO₂⁽⁺⁾ and maintains stable operation for 150 h. Moreover, the hybrid Pt/C⁽⁻⁾ || WFeMoB⁽⁺⁾ configuration operates at only 2.32 V at 2000 mA/cm² under industrial conditions (6 M KOH, 60 °C).</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"671 ","pages":"Article 239576"},"PeriodicalIF":7.9,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135673","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}