Journal of Power Sources最新文献

英文中文

The effect of applied voltage on the behavior of Ni- gadolinium-doped ceria cathodes in SOECs using 2D comb-shaped patterned cells 外加电压对二维梳状电池中掺杂Ni-钆的铈阴极性能的影响

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-02-08 DOI: 10.1016/j.jpowsour.2026.239473

Xiaolin Shao , Riyan Achmad Budiman , Mina Yamaguchi , Hitoshi Takamura , Keiji Yashiro , Tatsuya Kawada

Solid oxide electrolysis cells (SOECs), which are used for steam or co-electrolysis of H₂O and CO₂, are a promising clean energy technology. For commercialization, it is essential to understand long-term degradation mechanisms. To address the complexity of the porous structure of commercial cells and the associated challenges, this study employs a two-dimensional comb-shaped patterned cell. These patterned electrodes reproduce the cross-sectional geometry of conventional cells while avoiding the complexity of porous microstructures. In this configuration, Ni metal was applied as the cathode, and electrolysis experiments were conducted under various applied voltages. The results indicate that the effect of applied voltage on delamination is nonlinear, as the delamination sites vary with voltage. At −0.22 V, slight delamination occurred at the tips of the Ni stripes; at −0.47 V delamination became more pronounced. At the higher voltage of −0.94 V, the Ni tips adhere more strongly to the substrate and GDC shows a pronounced tendency to diffuse onto the Ni surface, while delamination initiates from the center of the cathode. These results demonstrate that the interaction between Ni and GDC is strongly dependent on the applied voltage, providing insights into optimized operating strategies.

{"title":"The effect of applied voltage on the behavior of Ni- gadolinium-doped ceria cathodes in SOECs using 2D comb-shaped patterned cells","authors":"Xiaolin Shao , Riyan Achmad Budiman , Mina Yamaguchi , Hitoshi Takamura , Keiji Yashiro , Tatsuya Kawada","doi":"10.1016/j.jpowsour.2026.239473","DOIUrl":"10.1016/j.jpowsour.2026.239473","url":null,"abstract":"<div><div>Solid oxide electrolysis cells (SOECs), which are used for steam or co-electrolysis of H<sub>2</sub>O and CO<sub>2</sub>, are a promising clean energy technology. For commercialization, it is essential to understand long-term degradation mechanisms. To address the complexity of the porous structure of commercial cells and the associated challenges, this study employs a two-dimensional comb-shaped patterned cell. These patterned electrodes reproduce the cross-sectional geometry of conventional cells while avoiding the complexity of porous microstructures. In this configuration, Ni metal was applied as the cathode, and electrolysis experiments were conducted under various applied voltages. The results indicate that the effect of applied voltage on delamination is nonlinear, as the delamination sites vary with voltage. At −0.22 V, slight delamination occurred at the tips of the Ni stripes; at −0.47 V delamination became more pronounced. At the higher voltage of −0.94 V, the Ni tips adhere more strongly to the substrate and GDC shows a pronounced tendency to diffuse onto the Ni surface, while delamination initiates from the center of the cathode. These results demonstrate that the interaction between Ni and GDC is strongly dependent on the applied voltage, providing insights into optimized operating strategies.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"671 ","pages":"Article 239473"},"PeriodicalIF":7.9,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135646","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

Impact of pore scale-modified GDL anisotropic properties on PEMFC performance 孔径改性GDL各向异性对PEMFC性能的影响

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-02-08 DOI: 10.1016/j.jpowsour.2026.239540

Min Li , Philipp Nachtigal , Dajan Mimic

The performance of fuel cells is strongly influenced by the anisotropic transport properties of the gas diffusion layer (GDL), yet these characteristics are often simplified in macroscopic models. In this work, a three-dimensional proton exchange membrane fuel cell (PEMFC) model is developed. Anisotropic transport parameters are incorporated, which are derived from pore-scale simulations of reconstructed GDL microstructures. A parametric investigation is conducted on porosity, gas diffusivity, electrical conductivity, and thermal conductivity, considering conditions both before and after the application of graphite-filled PTFE coatings. Internal distributions of current density, temperature, and reactant and product species are analysed to clarify key transport mechanisms. Results show that cell performance is highly sensitive to through-plane gas diffusivity, while electrical conductivity exerts a secondary but notable influence. Reduced diffusivity leads to pronounced performance losses at high current densities, whereas increased electrical conductivity enhances cell output. Thermal conductivity has minimal impact on polarisation behaviour, though higher values enhance heat removal. Furthermore, decreased porosity following coating treatment causes additional performance losses, particularly in the concentration-polarisation region. These insights demonstrate how realistic, interrelated GDL properties influence overall cell behaviour and provide guidance for GDL optimisation.

{"title":"Impact of pore scale-modified GDL anisotropic properties on PEMFC performance","authors":"Min Li , Philipp Nachtigal , Dajan Mimic","doi":"10.1016/j.jpowsour.2026.239540","DOIUrl":"10.1016/j.jpowsour.2026.239540","url":null,"abstract":"<div><div>The performance of fuel cells is strongly influenced by the anisotropic transport properties of the gas diffusion layer (GDL), yet these characteristics are often simplified in macroscopic models. In this work, a three-dimensional proton exchange membrane fuel cell (PEMFC) model is developed. Anisotropic transport parameters are incorporated, which are derived from pore-scale simulations of reconstructed GDL microstructures. A parametric investigation is conducted on porosity, gas diffusivity, electrical conductivity, and thermal conductivity, considering conditions both before and after the application of graphite-filled PTFE coatings. Internal distributions of current density, temperature, and reactant and product species are analysed to clarify key transport mechanisms. Results show that cell performance is highly sensitive to through-plane gas diffusivity, while electrical conductivity exerts a secondary but notable influence. Reduced diffusivity leads to pronounced performance losses at high current densities, whereas increased electrical conductivity enhances cell output. Thermal conductivity has minimal impact on polarisation behaviour, though higher values enhance heat removal. Furthermore, decreased porosity following coating treatment causes additional performance losses, particularly in the concentration-polarisation region. These insights demonstrate how realistic, interrelated GDL properties influence overall cell behaviour and provide guidance for GDL optimisation.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"671 ","pages":"Article 239540"},"PeriodicalIF":7.9,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135647","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

Nitrogen self-doped porous carbon material derived from aluminum-based metal-organic framework for symmetric supercapacitor 对称超级电容器用铝基金属有机骨架氮自掺杂多孔碳材料

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-02-07 DOI: 10.1016/j.jpowsour.2026.239559

Xingyao Li, Ruijie Xu, Beili Wang, Zhen Lu , Xiaolun Peng, Yazhen Wang

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.

{"title":"Nitrogen self-doped porous carbon material derived from aluminum-based metal-organic framework for symmetric supercapacitor","authors":"Xingyao Li, Ruijie Xu, Beili Wang, Zhen Lu , Xiaolun Peng, 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":"2026-02-07","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}

引用次数: 0

Observing electrolyte motion in commercial cylindrical Li-ion cells using ultrasound imaging 利用超声成像技术观察商用圆柱形锂离子电池中的电解质运动

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-02-07 DOI: 10.1016/j.jpowsour.2026.239455

Tobias Röhmel , Morian Sonnet , Gereon Stahl , Duc Minh Nguyen , Tim Falkenstein , Dirk Uwe Sauer

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.

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).

{"title":"Observing electrolyte motion in commercial cylindrical Li-ion cells using ultrasound imaging","authors":"Tobias Röhmel , Morian Sonnet , Gereon Stahl , Duc Minh Nguyen , Tim Falkenstein , 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":"2026-02-07","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}

引用次数: 0

Designing glass sealants for intermediate- and low-temperature solid oxide fuel cells: challenges and prospects 中低温固体氧化物燃料电池玻璃密封胶的设计：挑战与展望

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-02-07 DOI: 10.1016/j.jpowsour.2026.239579

K. Singh, Paramvir Kaur, Satwinder Singh Danewalia

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.

{"title":"Designing glass sealants for intermediate- and low-temperature solid oxide fuel cells: challenges and prospects","authors":"K. Singh, Paramvir Kaur, 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":"2026-02-07","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}

引用次数: 0

Trimetallic WFeMoB cotton cloud electrocatalyst for efficient electrochemical water splitting under harsh industrial conditions 用于恶劣工业条件下高效电化学水分解的三金属WFeMoB棉云电催化剂

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-02-07 DOI: 10.1016/j.jpowsour.2026.239576

Md Najibullah, Mehedi Hasan Joni, Sumiya Akter Dristy, Md Ahasan Habib, Jihoon Lee

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).

{"title":"Trimetallic WFeMoB cotton cloud electrocatalyst for efficient electrochemical water splitting under harsh industrial conditions","authors":"Md Najibullah, Mehedi Hasan Joni, Sumiya Akter Dristy, Md Ahasan Habib, 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/cm<sup>2</sup>. The bifunctional cell of WFeMoB<sup>(−)</sup> || WFeMoB<sup>(+)</sup> achieves a low cell voltage of 2.78 V at high current density of 2000 mA/cm<sup>2</sup> in 1 M KOH, outperforming the benchmark system of Pt/C<sup>(−)</sup> || RuO<sub>2</sub><sup>(+)</sup> and maintains stable operation for 150 h. Moreover, the hybrid Pt/C<sup>(−)</sup> || WFeMoB<sup>(+)</sup> configuration operates at only 2.32 V at 2000 mA/cm<sup>2</sup> 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":"2026-02-07","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}

引用次数: 0

Assessments of thermal-runaway behaviors in a NCM811-based cylindrical lithium-ion battery 基于ncm811的圆柱形锂离子电池热失控行为的评估

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-02-07 DOI: 10.1016/j.jpowsour.2026.239555

Congbo Yin , Yanxin Zhang , Lei Sheng , Zhendong Zhang , Zhouxin Liao , Lei Feng

Excellent thermal safety management is pivotal for the safe operation of lithium-ion battery cells, especially the NCM 811-based cells with higher specific energy. This study proposes a quantitative framework to characterize the thermal runaway behavior of NCM811-based 21700 cylindrical cells under varying states of health (SOH) and states of charge (SOC). Key parameters, including onset time, temperature and voltage evolution, combustion behavior, TNT equivalence, and damage radius, are systematically evaluated. A reduction in SOH accelerates thermal runaway initiation, with the trigger time decreasing from 1730 s at 100% SOH to 608 s at 60% SOH, corresponding to an absolute reduction of 1122 s (64.8%). Concurrently, thermal runaway severity decreases with declining SOH, as evidenced by a reduction in mass loss ratio from 85.9% (100% SOH) to 45.9% (60% SOH). In contrast, SOC exhibits a strong positive correlation with thermal hazard at a given SOH. Specifically, the thermal runaway trigger time decreases from 1472 s at 25% SOC to 603 s at 100% SOC, corresponding to a 59.1% reduction. These results clarify the competing roles of aging and charge level in governing thermal runaway characteristics and provide quantitative guidance for the thermal safety design and risk mitigation of high-energy-density battery modules.

{"title":"Assessments of thermal-runaway behaviors in a NCM811-based cylindrical lithium-ion battery","authors":"Congbo Yin , Yanxin Zhang , Lei Sheng , Zhendong Zhang , Zhouxin Liao , Lei Feng","doi":"10.1016/j.jpowsour.2026.239555","DOIUrl":"10.1016/j.jpowsour.2026.239555","url":null,"abstract":"<div><div>Excellent thermal safety management is pivotal for the safe operation of lithium-ion battery cells, especially the NCM 811-based cells with higher specific energy. This study proposes a quantitative framework to characterize the thermal runaway behavior of NCM811-based 21700 cylindrical cells under varying states of health (SOH) and states of charge (SOC). Key parameters, including onset time, temperature and voltage evolution, combustion behavior, TNT equivalence, and damage radius, are systematically evaluated. A reduction in SOH accelerates thermal runaway initiation, with the trigger time decreasing from 1730 s at 100% SOH to 608 s at 60% SOH, corresponding to an absolute reduction of 1122 s (64.8%). Concurrently, thermal runaway severity decreases with declining SOH, as evidenced by a reduction in mass loss ratio from 85.9% (100% SOH) to 45.9% (60% SOH). In contrast, SOC exhibits a strong positive correlation with thermal hazard at a given SOH. Specifically, the thermal runaway trigger time decreases from 1472 s at 25% SOC to 603 s at 100% SOC, corresponding to a 59.1% reduction. These results clarify the competing roles of aging and charge level in governing thermal runaway characteristics and provide quantitative guidance for the thermal safety design and risk mitigation of high-energy-density battery modules.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"671 ","pages":"Article 239555"},"PeriodicalIF":7.9,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135644","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

Roll-to-roll phase change tape enabled by expanded graphite/fatty acid composite for battery thermal management 由膨胀石墨/脂肪酸复合材料制成的卷对卷相变胶带，用于电池热管理

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-02-07 DOI: 10.1016/j.jpowsour.2026.239574

Shuang Yang , Shiwei Zhao , Yuan Lei , Xiaowei Fu , Pengfei Si , Lianhua Liu , Liang Jiang , Jingxin Lei

Conventional phase change materials (PCMs) for battery thermal management cannot conformally contact cells, are incompatible with roll-to-roll manufacturing, and offer narrow phase-transition windows. To overcome these limitations, in this work, a roll-to-roll manufacturable, shape-stabilized, wide-temperature-range phase change tape was synthesized by incorporating a binary fatty-acid PCM blend (lauric and stearic acids) within a continuous 3 dimensions (3D) expanded graphite (EG) scaffold, and is laminated with a double-sided adhesive for rapid, conformal integration. The EG network provides a high-surface-area, thermally conductive scaffold that prevents PCM leakage and accelerates heat transfer into the PCMs. Overlapping phase transitions yield an ultra-wide effective phase change range exceeding 20 °C broader than single-component PCMs, and create a quasi-isothermal platform aligning with typical battery operating temperatures. The synthesized wide-temperature-range phase change materials (PCMSA-LAs) used in this tape exhibited a high latent heat capacity (>160 J g⁻¹) without any leakage. Remarkably, wrapping a cell in eight layers of this phase change tape can reduce its peak surface temperature by ∼6 °C at a 4C discharge rate, while the tape's outer surface remained ∼24 °C cooler. This heat-buffering design suppresses overheating and thermal runaway risk, underscoring strong potential for scalable thermal management to enhance battery safety and longevity.

{"title":"Roll-to-roll phase change tape enabled by expanded graphite/fatty acid composite for battery thermal management","authors":"Shuang Yang , Shiwei Zhao , Yuan Lei , Xiaowei Fu , Pengfei Si , Lianhua Liu , Liang Jiang , Jingxin Lei","doi":"10.1016/j.jpowsour.2026.239574","DOIUrl":"10.1016/j.jpowsour.2026.239574","url":null,"abstract":"<div><div>Conventional phase change materials (PCMs) for battery thermal management cannot conformally contact cells, are incompatible with roll-to-roll manufacturing, and offer narrow phase-transition windows. To overcome these limitations, in this work, a roll-to-roll manufacturable, shape-stabilized, wide-temperature-range phase change tape was synthesized by incorporating a binary fatty-acid PCM blend (lauric and stearic acids) within a continuous 3 dimensions (3D) expanded graphite (EG) scaffold, and is laminated with a double-sided adhesive for rapid, conformal integration. The EG network provides a high-surface-area, thermally conductive scaffold that prevents PCM leakage and accelerates heat transfer into the PCMs. Overlapping phase transitions yield an ultra-wide effective phase change range exceeding 20 °C broader than single-component PCMs, and create a quasi-isothermal platform aligning with typical battery operating temperatures. The synthesized wide-temperature-range phase change materials (PCMSA-LAs) used in this tape exhibited a high latent heat capacity (>160 J g<sup>−1</sup>) without any leakage. Remarkably, wrapping a cell in eight layers of this phase change tape can reduce its peak surface temperature by ∼6 °C at a 4C discharge rate, while the tape's outer surface remained ∼24 °C cooler. This heat-buffering design suppresses overheating and thermal runaway risk, underscoring strong potential for scalable thermal management to enhance battery safety and longevity.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"671 ","pages":"Article 239574"},"PeriodicalIF":7.9,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135649","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

Manganese ions induced pillaring and interplanar engineering of ultra-thin NH4V4O10 nanobelts toward efficient zinc-ion storage 锰离子诱导超薄NH4V4O10纳米带成柱及面向高效锌离子存储的面间工程

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-02-07 DOI: 10.1016/j.jpowsour.2026.239468

Xiaolong Jia , Jiahui Ye , Yiwei Zheng , Shujia Zhang , Linrui Hou , Jiazheng Wang , Changzhou Yuan

Ammonium vanadates are promising cathode materials for aqueous zinc-ion batteries (AZIBs) owing to their high specific capacity and tunable layered architectures. However, their rate capability and cycling stability are limited severely by the strong electrostatic interaction between the V-O lattice and Zn²⁺, as well as the structural instability caused by the weak pillar effect of NH₄⁺ ions. To well address these issues, we herein propose a manganese ion (Mn²⁺) pre-intercalation strategy in ultra-thin NH₄V₄O₁₀ (MNVO) nanobelts, where the introduced Mn²⁺ acts as a robust structural pillar. First-principles calculations and structural characterization reveal that the pre-intercalated Mn²⁺ not only lowers the migration barrier of both Zn²⁺ and H⁺ but stabilizes layered framework through strong interactions between Mn and O. Coupled with the highly accessible surface of the ultra-thin nanobelts, the optimized MNVO cathode delivers a high specific capacity of 443.6 mAh g⁻¹ at 0.5 A g⁻¹, excellent rate performance (306.3 mAh g⁻¹ at 10 A g⁻¹), and remarkable long-term cycling stability (96.1% capacity retention after 2000 cycles). More meaningfully, the intrinsic Zn²⁺-storage mechanism of MNVO is reasonably proposed based on comprehensive ex-situ characterizations and theoretical calculations. The contribution here provides an efficient design methodology for developing high-performance AZIB cathode materials and beyond.

{"title":"Manganese ions induced pillaring and interplanar engineering of ultra-thin NH4V4O10 nanobelts toward efficient zinc-ion storage","authors":"Xiaolong Jia , Jiahui Ye , Yiwei Zheng , Shujia Zhang , Linrui Hou , Jiazheng Wang , Changzhou Yuan","doi":"10.1016/j.jpowsour.2026.239468","DOIUrl":"10.1016/j.jpowsour.2026.239468","url":null,"abstract":"<div><div>Ammonium vanadates are promising cathode materials for aqueous zinc-ion batteries (AZIBs) owing to their high specific capacity and tunable layered architectures. However, their rate capability and cycling stability are limited severely by the strong electrostatic interaction between the V-O lattice and Zn<sup>2+</sup>, as well as the structural instability caused by the weak pillar effect of NH<sub>4</sub><sup>+</sup> ions. To well address these issues, we herein propose a manganese ion (Mn<sup>2+</sup>) pre-intercalation strategy in ultra-thin NH<sub>4</sub>V<sub>4</sub>O<sub>10</sub> (MNVO) nanobelts, where the introduced Mn<sup>2+</sup> acts as a robust structural pillar. First-principles calculations and structural characterization reveal that the pre-intercalated Mn<sup>2+</sup> not only lowers the migration barrier of both Zn<sup>2+</sup> and H<sup>+</sup> but stabilizes layered framework through strong interactions between Mn and O. Coupled with the highly accessible surface of the ultra-thin nanobelts, the optimized MNVO cathode delivers a high specific capacity of 443.6 mAh g<sup>−1</sup> at 0.5 A g<sup>−1</sup>, excellent rate performance (306.3 mAh g<sup>−1</sup> at 10 A g<sup>−1</sup>), and remarkable long-term cycling stability (96.1% capacity retention after 2000 cycles). More meaningfully, the intrinsic Zn<sup>2+</sup>-storage mechanism of MNVO is reasonably proposed based on comprehensive <em>ex-situ</em> characterizations and theoretical calculations. The contribution here provides an efficient design methodology for developing high-performance AZIB cathode materials and beyond.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"671 ","pages":"Article 239468"},"PeriodicalIF":7.9,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135643","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

Pore sieving and optimization of biochar via a one-step pyrolysis process for zinc ion hybrid capacitors 锌离子杂化电容器用生物炭一步热解筛选及优化研究

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-02-07 DOI: 10.1016/j.jpowsour.2026.239552

Haotian Chen , Feng Gong , Kai Zhang , Shenglin Liu , Zongqi Chen , Xuanzhi Liu , Hualin Ye , Baiqian Dai , Rui Xiao

Aqueous zinc-ion hybrid capacitors (ZIHCs) are particularly promising owing to their intrinsic safety and cost-effectiveness, yet their energy density is severely limited by the inferior Zn²⁺ adsorption capacity of conventional carbon cathodes. Herein, a rational design of biomass-derived carbon cathodes with tailored pore architecture is demonstrated, guided by a fundamental understanding of the Zn²⁺ adsorption mechanism. Interaction energy calculations based on Density Functional Theory identify 6–12 Å as the optimal pore size for enhancing [Zn(H₂O)₆]²⁺ adsorption. Accordingly, a facile and mild pyrolysis strategy is developed to synthesize biochar with a hierarchically porous structure, high specific surface area and abundant oxygen functional groups. The resulting ZIHC delivers a high specific capacitance of 258 F g⁻¹, a battery-level energy density of 138 Wh kg⁻¹, and excellent cycling stability (95% retention after 10,000 cycles). This work demonstrates the critical role of pore sieving in guiding the synthesis of high-performance carbon materials for advanced energy storage.

{"title":"Pore sieving and optimization of biochar via a one-step pyrolysis process for zinc ion hybrid capacitors","authors":"Haotian Chen , Feng Gong , Kai Zhang , Shenglin Liu , Zongqi Chen , Xuanzhi Liu , Hualin Ye , Baiqian Dai , Rui Xiao","doi":"10.1016/j.jpowsour.2026.239552","DOIUrl":"10.1016/j.jpowsour.2026.239552","url":null,"abstract":"<div><div>Aqueous zinc-ion hybrid capacitors (ZIHCs) are particularly promising owing to their intrinsic safety and cost-effectiveness, yet their energy density is severely limited by the inferior Zn<sup>2+</sup> adsorption capacity of conventional carbon cathodes. Herein, a rational design of biomass-derived carbon cathodes with tailored pore architecture is demonstrated, guided by a fundamental understanding of the Zn<sup>2+</sup> adsorption mechanism. Interaction energy calculations based on Density Functional Theory identify 6–12 Å as the optimal pore size for enhancing [Zn(H<sub>2</sub>O)<sub>6</sub>]<sup>2+</sup> adsorption. Accordingly, a facile and mild pyrolysis strategy is developed to synthesize biochar with a hierarchically porous structure, high specific surface area and abundant oxygen functional groups. The resulting ZIHC delivers a high specific capacitance of 258 F g<sup>−1</sup>, a battery-level energy density of 138 Wh kg<sup>−1</sup>, and excellent cycling stability (95% retention after 10,000 cycles). This work demonstrates the critical role of pore sieving in guiding the synthesis of high-performance carbon materials for advanced energy storage.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"671 ","pages":"Article 239552"},"PeriodicalIF":7.9,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135671","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

下一页尾页

类型

全部化学•材料生命科学医学物理工程技术环境•农林材料科学地球科学法学管理学化学环境科学与生态学计算机科学教育学经济学农林科学人文科学生物学数学物理与天体物理心理学综合性期刊其他工业工程理学历史学农学文学信息工程

数据库

全部 ACS Publications Elsevier ieeexplore Springer The Royal Society of Chemistry Wiley

期刊

Journal of Power Sources

全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.

﹀