Journal of Power Sources最新文献_第2页

Modulation of micropores to remold the rate capability of lignin-derived porous carbon cathodes in zinc-ion hybrid supercapacitors 锌离子杂化超级电容器中木质素衍生多孔碳阴极的微孔改造性能

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-08 DOI: 10.1016/j.jpowsour.2025.237282

Tao Huang , Ying Wu , Guishan Liu , Yingying Chen , Gesong Huang , Fangbao Fu , Xihong Zu , Hai Li , Qiyu Liu , Wenli Zhang

{"title":"Modulation of micropores to remold the rate capability of lignin-derived porous carbon cathodes in zinc-ion hybrid supercapacitors","authors":"Tao Huang , Ying Wu , Guishan Liu , Yingying Chen , Gesong Huang , Fangbao Fu , Xihong Zu , Hai Li , Qiyu Liu , Wenli Zhang","doi":"10.1016/j.jpowsour.2025.237282","DOIUrl":"10.1016/j.jpowsour.2025.237282","url":null,"abstract":"<div><div>Recent advancements in energy storage systems highlight the potential of zinc-ion hybrid capacitors (ZIHCs) due to their synergistic combination of high energy and power density. To solve the poor rate capability of porous carbon cathodes in Zn<sup>2+</sup> storage, we propose a chemical activation and <em>in situ</em> templating strategy to tailor the pore structure of lignin-derived porous carbon (LPC). Mesoporous channels are engineered via the <em>in situ</em> pyrolysis of ZnC<sub>2</sub>O<sub>4</sub> to generate nano-ZnO templates to facilitate rapid zinc ion transport. Simultaneously, gas evolution during pyrolysis exfoliates the carbon framework, while the etch effect of ZnCl<sub>2</sub> results in the formation of abundant large micropores. The optimized LPC-2-3 exhibits a high specific surface area (SSA) of 1086 m<sup>2</sup> g<sup>−1</sup>, a large microporous structure (0.9–2 nm), and a hierarchical porous structure. Notably, when the current density increases from 0.1 to 50 A g<sup>−1</sup>, it retains 55.6 % of the initial capacity, which demonstrates outstanding electrochemical performances. The superior Zn<sup>2+</sup> ion storage capability of LPC-2-3 is ascribed to the hierarchical porous structure, which ensures efficient Zn<sup>2+</sup> ion transport. This work highlights the critical role of large micropore-dominated structures in the rate performance of ZIHCs and provides valuable perspective to the design of high-rate porous carbon cathodes through targeted pore structure engineering.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237282"},"PeriodicalIF":8.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916572","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

Raman spectroelectrochemistry for operando characterization of redox flow batteries 氧化还原液流电池operando表征的拉曼光谱电化学

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-08 DOI: 10.1016/j.jpowsour.2025.237272

Lara Lubian , Rubén Rubio-Presa , Virginia Ruiz , Alvaro Colina , Edgar Ventosa

{"title":"Raman spectroelectrochemistry for operando characterization of redox flow batteries","authors":"Lara Lubian , Rubén Rubio-Presa , Virginia Ruiz , Alvaro Colina , Edgar Ventosa","doi":"10.1016/j.jpowsour.2025.237272","DOIUrl":"10.1016/j.jpowsour.2025.237272","url":null,"abstract":"<div><div>Despite the potential of Aqueous Organic Redox Flow Batteries (AORFBs) to address intermittent energy generation from renewable sources, they must improve some key performance indicators to become competitive, in particular cycle stability. Development of advanced in-situ and time-resolved techniques plays a critical role to improve performance of AORFBs by enabling elucidation of the sources for energy storage capacity fading. The development and implementation of operando Raman spectroscopy is herein reported for dihydroxyanthraquinone–ferrocyanide alkaline flow battery. Validation of the technique is carried out using symmetrical cells, confirming that Raman spectroscopy can monitor in-situ the state of charge. In a full battery, time-resolved Raman spectroscopy is used for investigating the Faradaic imbalance process, showing that presence of oxygen in the anolyte leads to the progressive loss of available ferrocyanide. Raman spectroscopy also shows that ferricyanide self-discharges when left at open circuit. Finally, this technique is used to track in-situ the crossover of 2,6-dihydroxyanthraquinone. Surprisingly, the rate is found to increase at full state of charge, supporting recent findings using <span>NMR</span>. This operando Raman spectroscopy is anticipated to provide unique insights into critical processes in emerging redox flow battery chemistries.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237272"},"PeriodicalIF":8.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916657","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-density, high-activity and high-spin atomic Fe (Ⅲ) sites on ZIF-8-derived microporous carbon for efficient oxygen reduction reaction zif -8衍生的微孔碳上高密度、高活性和高自旋原子Fe（Ⅲ）位点用于高效氧还原反应

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-08 DOI: 10.1016/j.jpowsour.2025.237264

Cheng Zhou, Lina Wang, Junting Sun, Hongbo Wu, Jian Zhang, Zhong Li

{"title":"High-density, high-activity and high-spin atomic Fe (Ⅲ) sites on ZIF-8-derived microporous carbon for efficient oxygen reduction reaction","authors":"Cheng Zhou, Lina Wang, Junting Sun, Hongbo Wu, Jian Zhang, Zhong Li","doi":"10.1016/j.jpowsour.2025.237264","DOIUrl":"10.1016/j.jpowsour.2025.237264","url":null,"abstract":"<div><div>Enhancing oxygen reduction reaction (ORR) efficiency relies heavily on designing non-noble metal single-atom catalysts (SACs) with high-density and high-activity sites. For efficient ORR, Fe single atoms are precisely regulated and embedded into porous concave carbon derived from ZIF-8 in this work. ORR performance is significantly improved by the catalyst's concave design and microporous features, which optimize mass transfer and expose more active sites. Furthermore, the high-density, high-activity, and high-spin Fe (III) sites inside the material help to explain the increased intrinsic activity of the catalyst. Due to its unique carrier structure and iron site coordination, this catalyst exhibits outstanding ORR activity in a 0.1 M KOH solution. Additionally, zinc-air batteries constructed with this catalyst display a maximum peak power density of 151 mW cm<sup>−2</sup> and a high specific capacity of 818 mAh g<sub>Zn</sub><sup>−1</sup>, outperforming Pt/C-based systems. This study presents a method for precursor treatment to efficiently and conveniently synthesize microporous carbon-based ORR SACs, aiming to advance ORR catalyst design.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237264"},"PeriodicalIF":8.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916661","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

Sulfiding and phosphating the layered double hydroxide/metal-organic-framework subsequently to synthesize novel CoMnOxSyPz nanosheets with high-rate and high-areal supercapacitor performance 随后对层状双氢氧化物/金属-有机骨架进行硫化和磷化，合成了具有高速率和高面积超级电容器性能的新型CoMnOxSyPz纳米片

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-08 DOI: 10.1016/j.jpowsour.2025.237260

Jinping Zou , Dapeng Luo , Wenyao Li , Hongxiang Chen , Zhaohui Wei , Xiaoyun Ye , Xiaochun Wen , Li-An Ma

{"title":"Sulfiding and phosphating the layered double hydroxide/metal-organic-framework subsequently to synthesize novel CoMnOxSyPz nanosheets with high-rate and high-areal supercapacitor performance","authors":"Jinping Zou , Dapeng Luo , Wenyao Li , Hongxiang Chen , Zhaohui Wei , Xiaoyun Ye , Xiaochun Wen , Li-An Ma","doi":"10.1016/j.jpowsour.2025.237260","DOIUrl":"10.1016/j.jpowsour.2025.237260","url":null,"abstract":"<div><div>Metal-organic frameworks (MOFs) derived porous nanosheets have sparked widespread interest due to their porosity structure and component tunability, making them promising candidates for energy-storage applications. However, the poor charge-transfer capability limits their supercapacitor capability. Here, we successfully synthesize CoMnO<sub><em>x</em></sub>S<sub><em>y</em></sub>P<sub><em>z</em></sub> porous nanosheet electrodes enriched with oxygen vacancies on the nickel-foam substrate using MOFs as self-sacrificial templates by sulfiding and phosphating. The resulting P-doping and abundant oxygen-vacancy-induced active sites enhance the charge-transfer capability significantly, as indicated by the low charge-transfer impedance ∼0.11 Ω, much lower than that of CoMn-ZIF and CoMnO<sub><em>x</em></sub>S<sub><em>y</em></sub>. Consequently, CoMnO<sub><em>x</em></sub>S<sub><em>y</em></sub>P<sub><em>z</em></sub> electrode exhibits a high areal capacitance (9.83 F cm<sup>−2</sup> at 8 mA cm<sup>−2</sup>), 5.85 and 1.48 times that in CoMn-ZIF and CoMnO<sub><em>x</em></sub>S<sub><em>y</em></sub>, respectively, with a satisfactory rate of 71.7 % at 50 mA cm<sup>−2</sup>. Notably, the asymmetric supercapacitor (ASC) achieves the highest energy density (0.95 mWh) with a power density of 3.2 mW cm<sup>−2</sup>, and the maximum power density (40 mW cm<sup>−2</sup>) with an energy density of 0.57 mWh⋅cm<sup>−2</sup>. Furthermore, excellent stability is realized in ASC, up to 90 % during 7000 cycles at 16 mA cm<sup>−2</sup>. Our results reveal that introducing P, S, and O vacancies by sulfiding and phosphatizing could be an effective strategy to improve the supercapacitor performance of the MOF-derived nanosheet.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237260"},"PeriodicalIF":8.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916573","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

Visual experimental research of two-phase flow in long straight anode channels with different widths in a polymer electrolyte membrane water electrolysis cell 聚合物电解质膜式电解池中不同宽度直长阳极通道内两相流动的可视化实验研究

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-08 DOI: 10.1016/j.jpowsour.2025.237258

Yang Liu, Mengdong Chen, Jingke Mo, Hongwei Hao, Hui Tan, Xiaoxue Wang, Peng Jiang, Jiahua Li, Yuannan Wang, Zhanfeng Deng

{"title":"Visual experimental research of two-phase flow in long straight anode channels with different widths in a polymer electrolyte membrane water electrolysis cell","authors":"Yang Liu, Mengdong Chen, Jingke Mo, Hongwei Hao, Hui Tan, Xiaoxue Wang, Peng Jiang, Jiahua Li, Yuannan Wang, Zhanfeng Deng","doi":"10.1016/j.jpowsour.2025.237258","DOIUrl":"10.1016/j.jpowsour.2025.237258","url":null,"abstract":"<div><div>The characteristics of gas-liquid two-phase flow are crucial for heat and mass transfer in polymer electrolyte membrane (PEM) water electrolyzers. In this research, visual experiments are conducted using a specially designed cell with a transparent anode end plate and flow channels of different widths (1.3 mm and 0.8 mm) under varying current densities (0.1–2 A/cm<sup>2</sup>), temperatures (60∼80 °C), and water feed rates (60∼200 ml/min), corresponding to an inlet Reynolds number range of 500∼4500. Due to channel size limitation and increased flow resistance, the two-phase flow pattern transitions in the narrower channel happen over a shorter flow distance compared to the wider channel. A flow pattern map is developed based on inlet Reynolds number and current density, revealing that bubbly flow dominates at the entrance, while slug and annular flows are prevalent at the middle and exit sections. Bubble coalescence occurs when bubbles contact with each other or pass by porous transport layer (PTL) ejection spots. A three-stage gas transport mechanism in PTL is proposed, involving fingering forward movement, bubble formation and backflow, and path breakage and reset. The findings suggest incorporating channels of different widths in large-area PEM cells may control flow velocity and void fraction, potentially improving overall efficiency.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237258"},"PeriodicalIF":8.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916663","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

Inhomogeneous degradation mechanism of proton exchange membrane fuel cell stack based on inter-cell and intra-cell cases 基于胞间和胞内质子交换膜燃料电池堆非均匀降解机理的研究

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-08 DOI: 10.1016/j.jpowsour.2025.237195

Tiankuo Chu , Zikuan Zhang , Xukai Hou , Meng Xie , Daijun Yang , Bing Li , Pingwen Ming , Cunman Zhang

{"title":"Inhomogeneous degradation mechanism of proton exchange membrane fuel cell stack based on inter-cell and intra-cell cases","authors":"Tiankuo Chu , Zikuan Zhang , Xukai Hou , Meng Xie , Daijun Yang , Bing Li , Pingwen Ming , Cunman Zhang","doi":"10.1016/j.jpowsour.2025.237195","DOIUrl":"10.1016/j.jpowsour.2025.237195","url":null,"abstract":"<div><div>Proton exchange membrane fuel cells (PEMFCs) face significant durability challenges due to spatially heterogeneous degradation under dynamic operating conditions. This study investigates the inhomogeneous degradation mechanisms of a 3-cell metal plate PEMFC stack through a 1,000h dynamic load cycling test, combining in-situ electrochemical diagnostics and post-mortem characterization. Voltage and high-frequency resistance monitoring revealed accelerated degradation in the end-cell (cell#1), with a 10 % voltage decay at 1000 mA cm<sup>−2</sup>, compared to 3.28 % and 1.97 % for cell#2 and cell#3, respectively. Electrochemical impedance spectroscopy showed a 29.17 % increase in ohmic resistance (R<sub>s</sub>) and a 2.14-fold rise in mass transport resistance (R<sub>mt</sub>) for cell#1, linked to interfacial corrosion of bipolar plates and thinning of the membrane and catalyst layer. Spatial analysis of the membrane electrode assembly revealed localized catalyst layer degradation near the hydrogen inlet, with a 40.88 % decrease in electrochemical active surface area and Pt particle agglomeration. Hydrophobicity loss further exacerbated flooding risks. These findings highlight the effects of thermal-mechanical stress, reactant distribution, and material corrosion on degradation, offering insights for optimizing stack design and operating protocols.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237195"},"PeriodicalIF":8.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916664","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

New insights into the effects of impurities in coal on the sodium ion storage performances of coal-derived hard carbon 煤中杂质对煤源硬碳钠离子贮存性能影响的新认识

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-08 DOI: 10.1016/j.jpowsour.2025.236870

Chang-Jun Wang , Zong-Lin Yi , Jing-Peng Chen , Jian-Zhang Niu , Li-Jing Xie , Su-Li Li , Xiao-Ming Li , Jun-Fen Li , Fang-Yuan Su , Cheng-Meng Chen

{"title":"New insights into the effects of impurities in coal on the sodium ion storage performances of coal-derived hard carbon","authors":"Chang-Jun Wang , Zong-Lin Yi , Jing-Peng Chen , Jian-Zhang Niu , Li-Jing Xie , Su-Li Li , Xiao-Ming Li , Jun-Fen Li , Fang-Yuan Su , Cheng-Meng Chen","doi":"10.1016/j.jpowsour.2025.236870","DOIUrl":"10.1016/j.jpowsour.2025.236870","url":null,"abstract":"<div><div>Hard carbons (HCs) are one of the most promising anode materials for sodium-ion batteries. The presence of impurities in coal is a critical factor in determining the electrochemical performance of coal-derived HCs. However, the effect of different components varies during pyrolysis, and the mechanism of influence on the sodium storage performance of HCs is not clear. Herein, the effects of two representative impurities in coal on the changes in microstructure during pyrolysis and the sodium storage performance of HCs are systematically investigated, using refined pitch as a template. It is found that Al<sub>2</sub>O<sub>3</sub> can promote the removal of hydroxyl, alkyl groups and the generation of aromatic ether bonds during pyrolysis, thus reducing the steric hindrance effect and delaying the removal of oxygen-containing functional groups. Therefore, the addition of Al<sub>2</sub>O<sub>3</sub> promotes the formation of short-range ordered microcrystals, which is conducive to the transport of Na<sup>+</sup>. The resulting HCs (POPA-1300) exhibits significantly improved sodium storage performance. Meanwhile, the presence of kaolinite promotes the formation of graphite-like regions, which adversely affects the sodium storage performance of HCs. This work provides theoretical guidance for the selective removal of impurities in coal and the use of residual impurities to modulate the microstructure of HCs.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 236870"},"PeriodicalIF":8.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923834","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

Infiltrated electrodes for metal supported solid oxide electrolysis cells 金属支撑固体氧化物电解池用渗透电极

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-08 DOI: 10.1016/j.jpowsour.2025.237296

Federico Capotondo , Michael C. Tucker , Bhaskar R. Sudireddy , Anke Hagen

{"title":"Infiltrated electrodes for metal supported solid oxide electrolysis cells","authors":"Federico Capotondo , Michael C. Tucker , Bhaskar R. Sudireddy , Anke Hagen","doi":"10.1016/j.jpowsour.2025.237296","DOIUrl":"10.1016/j.jpowsour.2025.237296","url":null,"abstract":"<div><div>Metal-supported solid oxide cells (MSOCs) are an alternative to conventional solid oxide cells (SOCs) based on ceramic cermets, offering lower material costs and higher operational flexibility. In this study symmetric MSOCs with infiltrated electrodes are explored for steam electrolysis operation to understand the underlying operation and degradation principles and suggest a direction for future MSOCs development.</div><div>Two different fuel electrode backbones are used: an electronically-conductive lanthanum strontium co-doped iron nickel titanate (LSFNT) infiltrated with cerium-gadolinium oxide (CGO), or an ionic conductive zirconia based backbone (10ScYSZ) infiltrated with Ni:CGO. At the oxygen side, the backbone is 10ScYSZ, which is infiltrated with lanthanum-strontium co-doped cobalt oxide (LSC), or praseodymium oxide as cobalt-free alternative for comparison.</div><div>This study suggests that the backbone electronic conductivity is key for good electrochemical performance as well as for boosting cell durability. Highly electronically conductive nanoparticles, especially nickel, were observed to irreversibly agglomerate driven by thermal conditions, whereas CGO proved to be a very stable electrocatalyst. At the fuel side, CGO (LSFNT) electrode showed lower ASR and degradation rate than Ni:CGO(ScYSZ) configuration with measured values of 0.50 Ω cm2 and 11 %/1000 h (at 0.60 A/cm2), and 0.70 Ω cm2 and 26 %/1000 h (at 0.50 A/cm2) at 1.30 V, respectively (700 °C, 50 % steam in hydrogen at the fuel side and air at the oxygen electrode side, LSC(ScYSZ) oxygen electrode).</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237296"},"PeriodicalIF":8.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923835","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 electrochemical performance of vanadium pentoxide cathodes through Ruthenium doping: A first-principles study 钌掺杂提高五氧化二钒阴极电化学性能的第一性原理研究

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-08 DOI: 10.1016/j.jpowsour.2025.237181

Mehdi Vejdanihemmat

{"title":"Enhancing electrochemical performance of vanadium pentoxide cathodes through Ruthenium doping: A first-principles study","authors":"Mehdi Vejdanihemmat","doi":"10.1016/j.jpowsour.2025.237181","DOIUrl":"10.1016/j.jpowsour.2025.237181","url":null,"abstract":"<div><div>The performance of orthorhombic vanadium pentoxide (V<sub>2</sub>O<sub>5</sub>) as a cathode material in lithium-ion batteries (LIBs) is hindered by several limitations, including low ion diffusion coefficients, poor cycling stability, and moderate electronic conductivity. In this study, a first-principles investigation is conducted on Ru-doped V<sub>2</sub>O<sub>5</sub> using density functional theory (DFT) to address these challenges. The thermodynamic stability of both substitutional and interstitial doped materials is verified. An increase in unit cell volume is observed for both substitutional and interstitial doping, facilitating lithium-ion diffusion. Electronic structure calculations show a reduction in the band gap and an enhancement in electrical conductivity, improving cycling stability. Lithium diffusion pathways are identified using the nudged elastic band (NEB) method, and a lower energy barrier is observed for the doped compound compared to the undoped structure. Additionally, diffusion coefficients and ionic conductivities are found to be approximately 3.7 times higher in Ru-doped V<sub>2</sub>O<sub>5</sub> than in pure V<sub>2</sub>O<sub>5</sub>. The intercalation voltage for Ru-doped V<sub>2</sub>O<sub>5</sub> is calculated to be 4.35 V, surpassing the 3.05 V obtained for pure V<sub>2</sub>O<sub>5</sub>. These results highlight the potential of Ru-doped V<sub>2</sub>O<sub>5</sub> as an advanced cathode material for next-generation LIBs.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237181"},"PeriodicalIF":8.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916660","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

Development of a 1.6-kW range extender based on the hydrogen proton exchange membrane fuel cells stack for 1 ton class automated guided vehicles 基于氢质子交换膜燃料电池堆的1.6 kw增程器的开发，用于1吨级自动导向车辆

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-08 DOI: 10.1016/j.jpowsour.2025.237180

Joonsuk Kim , BongKwan Son , Hee Su Kim , KyungJae Jang

{"title":"Development of a 1.6-kW range extender based on the hydrogen proton exchange membrane fuel cells stack for 1 ton class automated guided vehicles","authors":"Joonsuk Kim , BongKwan Son , Hee Su Kim , KyungJae Jang","doi":"10.1016/j.jpowsour.2025.237180","DOIUrl":"10.1016/j.jpowsour.2025.237180","url":null,"abstract":"<div><div>Electrification of logistics equipment for carbon neutrality is a global trend. Automated Guided Vehicles are unmanned logistics/transportation equipment that are rapidly spreading to industrial sites. Currently, Automated Guided Vehicles run on batteries, but their usability is limited by their short operating and long charging times. Hydrogen fuel cells, particularly proton exchange membrane fuel cells, can be used to overcome these limitations while maintaining the environmental friendliness of Automated Guided Vehicles. In this study, we investigate the development of proton exchange membrane fuel cell for 1 ton class Automated Guided Vehicles. The results indicate that a 1.6-kW proton exchange membrane fuel cell with graphite bipolar plates can be applied to 1 ton class Automated Guided Vehicles. To maximize the fuel cell performance, stacking pressure optimization was performed. Also, the cell voltage deviation was analyzed. We confirm the stable performance of 1.6 kW and vibration durability of the Automated Guided Vehicles using two vibration modes. In addition, the applicability of the 1.6 kW proton exchange membrane fuel cell is verified using the power characteristics from an actual 1 ton class Automated Guided Vehicle.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237180"},"PeriodicalIF":8.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916574","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