Journal of Power Sources最新文献_第6页

Combined effect of cycle aging and temperature on the variation of the open-circuit voltage of lithium cobalt oxide batteries 循环老化和温度对钴酸锂电池开路电压变化的综合影响

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-09-29 DOI: 10.1016/j.jpowsour.2025.238479

Simone Barcellona , Silvia Colnago , Lorenzo Codecasa

{"title":"Combined effect of cycle aging and temperature on the variation of the open-circuit voltage of lithium cobalt oxide batteries","authors":"Simone Barcellona , Silvia Colnago , Lorenzo Codecasa","doi":"10.1016/j.jpowsour.2025.238479","DOIUrl":"10.1016/j.jpowsour.2025.238479","url":null,"abstract":"<div><div>A key focus in studying lithium-ion batteries (LiBs) is the estimation of their actual capacity. To this end, many algorithms rely on the relationship between the open-circuit voltage (OCV) and state of charge (SOC) or absolute state of discharge, <em>q</em>. This relationship can be influenced by factors such as temperature (in a reversible way) and battery degradation (in an irreversible way). Although several studies investigated variations in the OCV-SOC or OCV-<em>q</em> relationship due to temperature or cycle aging using lookup tables or analytical expressions with adjustment factors, a comprehensive analytical model that simultaneously incorporates both factors and defines its parameters remains absent. To address this gap, the present work extends an existing analytical OCV-<em>q</em> model to capture variations in the OCV-<em>q</em> relationship as a function of both battery temperature and cycling level. To this aim, a comprehensive experimental campaign was conducted on a LiB, characterizing its OCV curve across various temperatures and cycling levels. Finally, simulations validated the accuracy of the proposed OCV-<em>q</em> model, yielding a mean relative OCV error below 0.8 % across all tests. Furthermore, the model demonstrated the ability to estimate the actual battery capacity with an estimation error of less than 2.5 % in all cases.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238479"},"PeriodicalIF":7.9,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218627","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

Enhancing interfacial electron transfer by gradiently constructing polyaniline electron bridge between MOF and MnOx for high performance flexible supercapacitors 在MOF和MnOx之间梯度构建聚苯胺电子桥以增强界面电子传递

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-09-29 DOI: 10.1016/j.jpowsour.2025.238478

Juan Xu, Sihao Chen, Nengneng Han, Yuezhou Jing, Yahui Zhang, Jiayi Li, Mengge Ding, Pibin Bing, Zhongyang Li

{"title":"Enhancing interfacial electron transfer by gradiently constructing polyaniline electron bridge between MOF and MnOx for high performance flexible supercapacitors","authors":"Juan Xu, Sihao Chen, Nengneng Han, Yuezhou Jing, Yahui Zhang, Jiayi Li, Mengge Ding, Pibin Bing, Zhongyang Li","doi":"10.1016/j.jpowsour.2025.238478","DOIUrl":"10.1016/j.jpowsour.2025.238478","url":null,"abstract":"<div><div>Tailoring the dynamic construction of hetero-junction has emerged as a promising strategy for accelerating interfacial electron transfer for high performance flexible supercapacitors (FSCs), which remains a huge challenge. Here we engineer the O<sub>v</sub>-CoFe-MOF/MnO<sub>x</sub> hetero-junction with the gradiently constructed polyaniline (PANI) electron bridge to accelerate the interfacial charge transfer and improve the active site utilization. This configuration promotes the surface dynamic reconstruction by the formation of dual built-in electric field and provides high loading of the outing MnO<sub>x</sub> layer by the strong interface adaptability. And, the optimal electronic structure modification of both O<sub>v</sub>-CoFe-MOF and MnO<sub>x</sub> enhances reaction kinetics. And, the superior O<sub>v</sub>-CoFe-MOF@90PANI@MnO<sub>x</sub> electrode achieved high area specific capacitance of 1193.18 mF/cm<sup>2</sup> and maintained high capacitance retention of 92.15% over 30,000 cycles. Importantly, the FSCs assembled with O<sub>v</sub>-CoFe-MOF@90PANI@MnO<sub>x</sub> electrodes show high energy density of 354 mWh/cm<sup>2</sup> and keep high capacitance retention of 89.47% after 25,000 cycles, along with high flexibility at varied bending angles. The combination of two FSCs in a series can illuminate the LED arrays, indicating the potential value in practical applications. Furthermore, this study introduces an effective design for regulating electron transfer by constructing the PANI electron bridge, paving the way for the more promising energy storage devices.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238478"},"PeriodicalIF":7.9,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218587","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

Effect of variable temperatures on machine learning battery SoH estimation for auxiliary aircraft batteries 变温度对辅助飞机电池SoH估计的影响

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-09-29 DOI: 10.1016/j.jpowsour.2025.238451

Shivanshu Shekhar , Lucia Gauchia , Hortensia Amaris , Álvaro Pérez-Borondo , Carlos Hernández

{"title":"Effect of variable temperatures on machine learning battery SoH estimation for auxiliary aircraft batteries","authors":"Shivanshu Shekhar , Lucia Gauchia , Hortensia Amaris , Álvaro Pérez-Borondo , Carlos Hernández","doi":"10.1016/j.jpowsour.2025.238451","DOIUrl":"10.1016/j.jpowsour.2025.238451","url":null,"abstract":"<div><div>In aircraft applications Nickel-based batteries are increasingly being replaced by Lithium-based technologies, particularly for their auxiliary unit, which requires a detailed study of their aging for management purposes. This research examines the influence of temperature variations on the identification and extraction of battery features, assessing their suitability as indicators for estimating the battery State-of-Health (SoH). The effect of temperature variations is also studied for machine learning models, both benchmark ones (kernel-based and neural network) and a proposed TCN - Neural ODE one. Optimized kernel-based models through Bayesian Search Cross-Validation and Grid Search Cross-Validation show improved results. Two neural network models, Long Short-Term Memory (LSTM) and Gated Recurrent Unit (GRU), are tested, but show a worse performance, probably due to the smaller dataset. The hybrid model presented, a TCN - Neural ODE improves upon the neural-network model, showing a better performance with smaller datasets and short and long-term dynamics. The effectiveness of the algorithms is determined using Root Mean Squared Error (RMSE), Mean Absolute Error (MAE), and computing time.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238451"},"PeriodicalIF":7.9,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218768","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

Facile synthesis of a high-entropy Oxide-Si nanocomposite via electrostatic spinning for lithium-ion battery electrodes 静电纺丝法制备用于锂离子电池电极的高熵氧化硅纳米复合材料

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-09-29 DOI: 10.1016/j.jpowsour.2025.238438

Jun Du , Binbin Jin , Liwei Liao , XinYi Shen , Zhe Mei , Qingcheng Du , Bingxin Lei , Liying Liang

{"title":"Facile synthesis of a high-entropy Oxide-Si nanocomposite via electrostatic spinning for lithium-ion battery electrodes","authors":"Jun Du , Binbin Jin , Liwei Liao , XinYi Shen , Zhe Mei , Qingcheng Du , Bingxin Lei , Liying Liang","doi":"10.1016/j.jpowsour.2025.238438","DOIUrl":"10.1016/j.jpowsour.2025.238438","url":null,"abstract":"<div><div>High-entropy oxides (HEOs) have emerged as potential contenders in materials science because of their exceptional structural stability and superior ionic conductivity. Silicon (Si) produces a significant volume expansion effect when utilized as an anode component in lithium-ion batteries (LIBs), which restricts its use in high-energy density systems. To address this issue, our study innovatively adopts the electrospinning technique to meticulously design a composite system consisting of spinel-structured HEO(FeCoNiCrMn)<sub>3</sub>O<sub>4</sub> and nanostructured Si, successfully fabricating a porous fibrous Si/HEO composite. In this composite, the HEO tightly and uniformly encapsulates the Si nanoparticles, effectively isolating the Si from direct exposure to the electrolyte while simultaneously constructing a nanoporous fibrous framework that markedly disperses the stresses generated during lithiation, thereby significantly enhancing the structural stability of the material. Furthermore, its stability mechanism was explained through Electron Localization Function (ELF) calculations. The experimental outcomes highlight the outstanding stability and effectiveness of the fabricated Si/HEO electrode. Upon exposure to a current density of 0.1 A g<sup>−1</sup>, the electrode demonstrates a remarkable capacity retention of 1393.28 mAh g<sup>−1</sup> following 200 cycles. Therefore, the study aims to guide the design and production of lithium-ion battery electrode materials featuring novel silicon/HEO nanocomposites.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"659 ","pages":"Article 238438"},"PeriodicalIF":7.9,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217881","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

Probing carbon black deagglomeration in lithium-ion battery cathode manufacturing using powder resistivity metrics 用粉末电阻率法探测锂离子电池正极制造中炭黑的脱团

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-09-29 DOI: 10.1016/j.jpowsour.2025.238311

Guo J. Lian , Prateek Verma , Denis Cumming , Rachel M. Smith

{"title":"Probing carbon black deagglomeration in lithium-ion battery cathode manufacturing using powder resistivity metrics","authors":"Guo J. Lian , Prateek Verma , Denis Cumming , Rachel M. Smith","doi":"10.1016/j.jpowsour.2025.238311","DOIUrl":"10.1016/j.jpowsour.2025.238311","url":null,"abstract":"<div><div>Carbon black dispersion is critical to achieving a percolated network in lithium-ion battery electrodes. Existing knowledge relies on legacy insights, lacks mechanistic understanding, and direct quantification of dispersion remains challenging due to nanoscale particle sizes. This study presents the first mechanistic investigation of carbon black deagglomeration via mechanofusion, using powder resistivity to examine deagglomeration behaviour, linking dry mixing parameters, CBD structures and coating characteristics. Low powder resistivity can be achieved with a short mixing time, while optimal mixing speed depends on carbon loading and mixing time. Inadequate mixing results in inhomogeneous distribution of conductive additives, and excessive mixing breaks down large carbon black structures necessary for long-range conduction, increasing powder resistivity. While powder resistivity correlates with deagglomeration, it does not directly predict electrochemical performance. These findings highlight the importance of a combination of long and short-range contacts in the carbon binder domain, facilitated by conductive carbon coatings, to enhance electrochemical performance. This work introduces a practical technique to assess carbon black deagglomeration, traditionally evaluated through slurry, electrode, or cell-level properties. Powder resistivity can be effectively used to correlate carbon black structures with dispersion during mixing, providing a valuable tool for data-driven optimisation of mixing processes and conductive network formation.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"659 ","pages":"Article 238311"},"PeriodicalIF":7.9,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217883","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

High-performance, metal-free planar supercapacitors based on laser-patterned high-quality MXene electrodes 高性能，无金属平面超级电容器基于激光图图化的高品质MXene电极

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-09-29 DOI: 10.1016/j.jpowsour.2025.238526

Yige He , Xuening Jiang , Xinyu Zhu , Xin Wang , Yu Gu , YuanJia Cao , Jiale Liang , Lei Jiang

{"title":"High-performance, metal-free planar supercapacitors based on laser-patterned high-quality MXene electrodes","authors":"Yige He , Xuening Jiang , Xinyu Zhu , Xin Wang , Yu Gu , YuanJia Cao , Jiale Liang , Lei Jiang","doi":"10.1016/j.jpowsour.2025.238526","DOIUrl":"10.1016/j.jpowsour.2025.238526","url":null,"abstract":"<div><div>The laser ablation technique, a mask-free and efficient method to create customized patterns on various substrates, currently encounters thermal effect-induced issues of electrode quality and performance degradation as well as high cost limitation in practical application specifically in the fabrication of MXene electrodes. In this work, we utilized a common commercial infrared laser marker to fabricate on-chip MXene electrodes, and the thermal effect produced during the laser patterning was effectively alleviated by adopting a simple water-cooling trick. This water-cooling assisted laser ablation (WALA) strategy enabled scalable manufacturing of well-defined, high-quality MXene microelectrodes with diverse configurations, shapes, and integrations on various substrates in a facile, efficient and cost-effective way. The areal mass loading (AML) of MXene in the electrode was tuned to optimize the charge storage performance of the metal-free solid-state supercapacitors. Notably, at an AML of 3 mg/cm<sup>2</sup> for the MXene electrode, a high areal specific capacitance of 138 mF/cm<sup>2</sup> and energy density of 6.85 μWh/cm<sup>2</sup> were achieved. This work demonstrates an easily implementable, efficient, and economically viable strategy for the scalable production of high-quality MXene electrodes for high-performance supercapacitors.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238526"},"PeriodicalIF":7.9,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218580","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

LiNi0.5Mn1.5O4 from aqueous slurry and chitosan-based binder: when high performance meets sustainability LiNi0.5Mn1.5O4从水浆和壳聚糖基粘合剂：当高性能满足可持续性

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-09-29 DOI: 10.1016/j.jpowsour.2025.238468

Francesco Falciani , Denise Gregucci , Luca Bargnesi , Antonio De Marco , Andrea Chiatto , Giampaolo Lacarbonara , Catia Arbizzani

{"title":"LiNi0.5Mn1.5O4 from aqueous slurry and chitosan-based binder: when high performance meets sustainability","authors":"Francesco Falciani , Denise Gregucci , Luca Bargnesi , Antonio De Marco , Andrea Chiatto , Giampaolo Lacarbonara , Catia Arbizzani","doi":"10.1016/j.jpowsour.2025.238468","DOIUrl":"10.1016/j.jpowsour.2025.238468","url":null,"abstract":"<div><div>Strategies for simultaneously producing high-performance electrochemical energy storage systems with sustainable processes are in the spotlight. The first obvious approach is using Co-free cathodes; the second one is the substitution of organic solvent with water in electrode production, with the further improvement of using bio-derived binders. With LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> (LNMO), a Co-free, high-potential cathode material, we prepare electrodes with chitosan-based binders to assess their performance in Li metal cells with the conventional electrolytic medium that does not contain other fluorinated compounds but the salt. Usually, fluoroethylene carbonate is added in high-voltage cells, instead of vinylene carbonate, to improve anode interface stability. In order to make use of Li metal anode for maximizing the specific power and energy of the cell, we introduce tetraethylammonium hexafluorophosphate, an additive to ameliorate dendrite growth. Additionally, the effect of 1,3-dioxolane (DOL) in the electrolytic mixture is evaluated as an additive able to produce a thin protective layer of poly(1,3)-dioxolane on LNMO by in situ polymerization. The electrodes are characterized by standard electrochemical methods, and the electrochemical study is completed with physicochemical tests and postmortem analyses to assess the feasibility of these sustainable electrodes and the effectiveness of the additives for the stability and cycle life of the material.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238468"},"PeriodicalIF":7.9,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218712","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

Bimetallic tungsten disulfide engineered MXene nanocomposite: A multifunctional electrode for high-performance supercapacitor and overall water splitting towards sustainable green hydrogen production 双金属二硫化钨工程MXene纳米复合材料：用于高性能超级电容器和整体水分解的多功能电极，实现可持续的绿色制氢

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-09-29 DOI: 10.1016/j.jpowsour.2025.238473

Amjad Khan , Ragu Sasikumar , Byungki Kim

{"title":"Bimetallic tungsten disulfide engineered MXene nanocomposite: A multifunctional electrode for high-performance supercapacitor and overall water splitting towards sustainable green hydrogen production","authors":"Amjad Khan , Ragu Sasikumar , Byungki Kim","doi":"10.1016/j.jpowsour.2025.238473","DOIUrl":"10.1016/j.jpowsour.2025.238473","url":null,"abstract":"<div><div>The development of multifunctional materials that address both energy storage and sustainable hydrogen production is critical for next-generation renewable energy technologies. This study presents a cobalt-nickel-tungsten disulfide-incorporated MXene (MXene/CoNiWS<sub>2</sub>) nanocomposite as a high-performance electrode for supercapacitor and overall water-splitting applications. As a supercapacitor electrode, it delivers a high specific capacity of 631.98 mAh cm<sup>−2</sup> (1007.08 F g<sup>−1</sup>) at 1 mA cm<sup>−2</sup>, retaining 81.1 % capacity and 96.5 % coulombic efficiency after 15,000 cycles. The device achieves an energy density of 17.65 Wh kg<sup>−1</sup> and a power density of 56.35 W kg<sup>−1</sup>. For water-splitting, the electrode exhibits a hydrogen evolution reaction (HER) overpotential of 209.1 mV at 10 mA cm<sup>−2</sup> (Tafel slope: 92.6 mV dec<sup>−1</sup>) and an oxygen evolution reaction (OER) overpotential of 223 mV at 10 mA cm<sup>−2</sup> (Tafel slope: 102.2 mV dec<sup>−1</sup>), exhibits excellent catalytic activity and durability. Real-time demonstrations power small electronic devices including a fan, light-emitting diode (LED), stopwatch, and calculator using the supercapacitor. Additionally, the water-splitting cell integrates with renewable energy sources to produce green hydrogen (H<sub>2</sub>), which subsequently powers a fuel cell to drive a fan in real time. These findings position MXene/CoNiWS<sub>2</sub> as a scalable and versatile material for energy storage and green hydrogen production systems.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"659 ","pages":"Article 238473"},"PeriodicalIF":7.9,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217884","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

Decoration NiFe layered double hydroxide on nitrogen doped carbon nanotube confined Fe nanoparticles for superior rechargeable zinc air battery NiFe在氮掺杂碳纳米管约束铁纳米颗粒上层状双氢氧化物制备性能优异的可充电锌空气电池

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-09-28 DOI: 10.1016/j.jpowsour.2025.238507

Yuhua Xie , Xianwei Li , Qi Xu , Ruiyou Liu , Chen Li , Fang Luo , Zehui Yang

{"title":"Decoration NiFe layered double hydroxide on nitrogen doped carbon nanotube confined Fe nanoparticles for superior rechargeable zinc air battery","authors":"Yuhua Xie , Xianwei Li , Qi Xu , Ruiyou Liu , Chen Li , Fang Luo , Zehui Yang","doi":"10.1016/j.jpowsour.2025.238507","DOIUrl":"10.1016/j.jpowsour.2025.238507","url":null,"abstract":"<div><div>The bifunctionality of oxygen electrocatalyst for rechargeable zinc air battery (ZAB) strongly determines the performance and stability. In this study, we devise the formation of nickel-iron layered double hydroxide (NiFe-LDH) decorated nitrogen doped carbon nanotubes confined iron nanoparticles (NiFe-LDH@Fe/NCNT) as superior electrocatalyst for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The overpotential at 10 mA cm<sup>−2</sup> is 264 mV for NiFe-LDH@Fe/NCNT, 49 mV lower than commercial IrO<sub>2</sub>, corresponding to a 14.3-fold higher specific activity. A fast surface reconstruction to active site is found for NiFe-LDH@Fe/NCNT from <em>operando</em> electrochemical impedance spectroscopy. Besides, the kinetic current density is 4.39 mA cm<sup>−2</sup> for NiFe-LDH@Fe/NCNT at 0.85 V vs. RHE, depicting a 1.3-time high than commercial Pt/C in ORR catalysis. The exceptional bifunctionality of NiFe-LDH@Fe/NCNT is reflected by the ΔE (E<sub>η10</sub>-E<sub>1/2</sub>) of 0.61 V, relatively narrower than Pt/C-IrO<sub>2</sub>. Moreover, the ZAB performance reaches 223.3 mW cm<sup>−2</sup> for NiFe-LDH@Fe/NCNT, which is enhanced by a factor of 1.7 compared to Pt/C-IrO<sub>2</sub>; additionally, stable voltage gap is recorded for NiFe-LDH@Fe/NCNT within 510 h. The all-solid-state ZAB offers a maximum power density of 104.5 mW cm<sup>−2</sup>. The enhanced catalytic activity is originated from the electronic interaction between NiFe-LDH and Fe/NCNT contributing to an upshifted <em>d</em> band center, enhancing the binding strength between active site and oxygen reaction intermediates.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238507"},"PeriodicalIF":7.9,"publicationDate":"2025-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218588","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

Mn-substituted spinel zinc cobaltite nanoplates as electrode materials for solid-state asymmetric supercapacitors 锰取代尖晶石钴酸锌纳米板作为固态非对称超级电容器的电极材料

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-09-28 DOI: 10.1016/j.jpowsour.2025.238436

Prabhu Sengodan , Xu Yang , Yuanmeng Tang , Sivaganesh Dhanushkodi , Rui Zhang , Bisheng Li , Huachang Hong , John H.T. Luong , Yasin Orooji

{"title":"Mn-substituted spinel zinc cobaltite nanoplates as electrode materials for solid-state asymmetric supercapacitors","authors":"Prabhu Sengodan , Xu Yang , Yuanmeng Tang , Sivaganesh Dhanushkodi , Rui Zhang , Bisheng Li , Huachang Hong , John H.T. Luong , Yasin Orooji","doi":"10.1016/j.jpowsour.2025.238436","DOIUrl":"10.1016/j.jpowsour.2025.238436","url":null,"abstract":"<div><div>Metal oxides with a spinel structure are attracting increasing attention for use in the storage and conversion of energy. Based on their high porosity with good chemical stability, and high surface area, they are considered a superior material in energy storage applications. The Mn-substituted spinel zinc-cobalt oxide (zinc manganese cobaltite; ZnMnCo<sub>2</sub>O<sub>4</sub> (ZMC)) with a uniform plate-like nanostructure and tea-waste biomass-derived active carbon (TWAC) were prepared via simple hydrothermal and chemical methods. The synthesized ZMC and TWAC were utilized as electrode materials for the anodes and cathodes in a solid-state supercapacitor. In the half-cell setup, the Mn-substituted ZnCo<sub>2</sub>O<sub>4</sub> (ZMC-5) electrode provided a specific capacitance (Cs) of 791 F/g at a current density (CD) of 0.5 A/g using 0.5 M Na<sub>2</sub>SO<sub>4</sub> as the electrolyte. In addition, the life cycle performance of the ZMC-5 electrode delivered a retention capacity of 88 % after 10,000 charge and discharge (GCD) cycles with 94 % coulombic efficiency (CE). The negative electrode (TWAC) shows a Cs of 485 F/g at 0.5 A/g. The solid-state asymmetric supercapacitor (SSAS) was fabricated using ZMC, TWAC, and PVA/Na<sub>2</sub>SO<sub>4</sub> as the anode, cathode, and electrolyte. The assembled ZMC-5/TWAC device exhibited high Cs and 62 Wh/kg @ power density (PD) of 2000 W/kg. The constructed ZMC-5//TWAC devices were able to glow up 25 LEDs (red) in series connection for 5 min.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238436"},"PeriodicalIF":7.9,"publicationDate":"2025-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218637","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