International Journal of Hydrogen Energy最新文献_第2页

Effect of high temperature and irradiation on the near-surface microstructure of YHx 高温和辐照对YHx近表面微观结构的影响

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-04-27 DOI: 10.1016/j.ijhydene.2025.04.363

Ying Li , Xuyang Shang , Keke Hou , Yajuan Zhong , Jun Lin

{"title":"Effect of high temperature and irradiation on the near-surface microstructure of YHx","authors":"Ying Li , Xuyang Shang , Keke Hou , Yajuan Zhong , Jun Lin","doi":"10.1016/j.ijhydene.2025.04.363","DOIUrl":"10.1016/j.ijhydene.2025.04.363","url":null,"abstract":"<div><div>To study the microstructural evolution of Yttrium hydride (YH<sub>x</sub>) under operational conditions, the surface phase transformation, morphology, and microstructure of YH<sub>x</sub> samples fabricated by spark plasma sintering (SPS) were characterized after high-temperature proton irradiation and isochronous annealing. Grazing incidence X-ray diffraction (GIXRD) results showed that yttrium oxide formed in all irradiated and annealed samples. Scanning electron microscope (SEM) observations revealed surface blistering, which is related to the irradiation dose. The near-surface microstructure was further characterized by transmission electron microscopy (TEM), which showed the presence of voids near the surface. Irradiated samples exhibited a higher number density of cavities and a reduction in cavity size compared to the isochronous annealing samples. Temperature and irradiation-induced vacancies were found to contribute to increased hydrogen mobility and hydrogen dissociation, as revealed by density functional theory (DFT). The mechanism underlying the evolution of the near-surface microstructure, including void formation and surface blistering, was thereby elucidated.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"130 ","pages":"Pages 304-312"},"PeriodicalIF":8.1,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876922","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

Hydrogen storage of Mg–3Zn–1Ca-0.5Mn industrial scale magnesium ring processed by hot upsetting and radial axial ring rolling 热镦和径向轴向轧制Mg-3Zn-1Ca-0.5Mn工业规模镁环的储氢研究

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-04-27 DOI: 10.1016/j.ijhydene.2025.04.122

H. Vafaeenezhad , B. Nateq , M. Mahmoudi , M. Fesahat , Sh Azizpour

{"title":"Hydrogen storage of Mg–3Zn–1Ca-0.5Mn industrial scale magnesium ring processed by hot upsetting and radial axial ring rolling","authors":"H. Vafaeenezhad , B. Nateq , M. Mahmoudi , M. Fesahat , Sh Azizpour","doi":"10.1016/j.ijhydene.2025.04.122","DOIUrl":"10.1016/j.ijhydene.2025.04.122","url":null,"abstract":"<div><div>An industrial plastic deformation method involving large strain induction, known as ring rolling (RR), was applied after initial upsetting to produce an ultra-fine-grained Mg ring part with superior hydrogen storage capabilities at industrial scale. The microstructure evolution and hydrogen storage characteristics of the Mg–3Zn–1Ca-0.5Mn alloy (ZX31) were analyzed to establish a correlation between grain structure and hydrogen storage behavior. The enhanced hydrogen storage performance of the ring-rolled material was compared to the upset-only condition using Sievert testing. Results revealed that hydrogen absorption and desorption kinetics are governed by the level of plastic strain and the associated microstructure/substructure modifications induced during processing. Grain refinement achieved through hybrid hot upsetting-ring rolling promoted the formation of effective interfaces, leading to improved hydrogen uptake kinetics. Transmission electron microscopy (TEM) of the severely deformed samples showed the development of dislocation substructures, highlighting their critical role in controlling hydrogen storage performance. Finally, the relationship between hydrogen storage and release kinetics and the microstructure-substructure features was discussed.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"130 ","pages":"Pages 440-451"},"PeriodicalIF":8.1,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876924","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

Advances and prospects of failure modes in key hydrogen-related components within the hydrogen energy supply chain 氢能供应链中关键氢相关部件失效模式研究进展与展望

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-04-27 DOI: 10.1016/j.ijhydene.2025.04.333

Yuan Gao , Cong Peng , Wen Chen , Zhigang Liu , Shi Liu

{"title":"Advances and prospects of failure modes in key hydrogen-related components within the hydrogen energy supply chain","authors":"Yuan Gao , Cong Peng , Wen Chen , Zhigang Liu , Shi Liu","doi":"10.1016/j.ijhydene.2025.04.333","DOIUrl":"10.1016/j.ijhydene.2025.04.333","url":null,"abstract":"<div><div>As a clean and efficient form of energy, hydrogen energy occupies an important position in energy transformation. This paper systematically reviews the failure modes and research progress of key hydrogen-related components in the hydrogen energy supply chain, including the main failure mechanisms of hydrogen pipelines, hydrogen storage tanks, hydrogen valves, etc. Through an in-depth analysis of material selection, microscopic failure mechanisms, environmental factors, and process adaptability, this paper summarizes the current research progress and identifies existing shortcomings. In addition, this paper also discusses the application potential of new hydrogen embrittlement-resistant materials, non-destructive testing technologies and intelligent monitoring platforms in improving the reliability and safety of hydrogen energy systems, and proposes future research directions. Studies indicate that a comprehensive understanding and effective mitigation of failure modes in hydrogen-related components are critical for the large-scale adoption of hydrogen energy technologies.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"130 ","pages":"Pages 503-519"},"PeriodicalIF":8.1,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876925","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

Design and optimization for industrial reactor and crude separation process via coupling mechanistic kinetics with heat/momentum transfers: Acetic acid hydrogenation to ethanol 热动量传递耦合机理动力学的工业反应器和原油分离工艺设计与优化：醋酸加氢制乙醇

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-04-27 DOI: 10.1016/j.ijhydene.2025.04.209

Can Zhou , Chen-Xi You , Yang Liu , Hui Shi , Chengtian Cui , Jihai Tang , Mifen Cui , Xu Qiao , Ming Xia

{"title":"Design and optimization for industrial reactor and crude separation process via coupling mechanistic kinetics with heat/momentum transfers: Acetic acid hydrogenation to ethanol","authors":"Can Zhou , Chen-Xi You , Yang Liu , Hui Shi , Chengtian Cui , Jihai Tang , Mifen Cui , Xu Qiao , Ming Xia","doi":"10.1016/j.ijhydene.2025.04.209","DOIUrl":"10.1016/j.ijhydene.2025.04.209","url":null,"abstract":"<div><div>Ethanol is used to produce various value-added chemicals and as automobile fuel. Acetic acid hydrogenation to ethanol is of practical significance to meet the increasing market. However, limited engineering research for reactor and crude separation process for the acetic acid hydrogenation to ethanol despite the increasingly mature catalyst system. Moreover, the traditional approach of industrial reactor design mainly relies on point data and inadequately quantifies the strong coupling between reaction rate and transfers within the reactor, which is prone to local and loose design and optimization. In this work, a coupled design approach that combines kinetics with transfers is proposed for designing and optimizing the multi-tubular fixed-bed reactor for the acetic acid hydrogenation to ethanol. To efficiently achieve the products crude separation, staged cooling/flash/absorption/desorption units featuring with N-methyl-2-pyrrolidone as an absorbent is proposed, numerically designed and optimized. Further heuristic heat integration is also investigated to conserve extra energy of the preliminary process, which features that a by-product steam generated from ethanol synthesis reactor is utilized to drive the reboiler of the desorption. It is demonstrated that the heat-integrated process presents significant economic and emission advantages compared with the preliminary process, specifically with 36.5 % and 10.9 % reductions in operating cost and total annual cost respectively, as well as 58.1 % reductions in CO<sub>2</sub> emissions. The cost of synthesizing ethanol with 100 ktpy production is as low as 14.25 $/t. This work could provide a feasible and promising reactor and crude separation process for acetic acid hydrogenation to ethanol, which features economic, high-efficient, energy-saving, and low-carbon.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"130 ","pages":"Pages 462-479"},"PeriodicalIF":8.1,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876769","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

Fabrication of SiW9Co3/CdIn2S4 heterojunction with boosted photocatalytic performance for H2 generation and Cr(VI) reduction SiW9Co3/CdIn2S4异质结的制备及其对H2生成和Cr（VI）还原的光催化性能

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-04-27 DOI: 10.1016/j.ijhydene.2025.04.330

Chengxin Chen , Hongfei Shi , Ao Rong , Meijie Wei , Xiang Zhou , Bo Feng , Weidong Wang

{"title":"Fabrication of SiW9Co3/CdIn2S4 heterojunction with boosted photocatalytic performance for H2 generation and Cr(VI) reduction","authors":"Chengxin Chen , Hongfei Shi , Ao Rong , Meijie Wei , Xiang Zhou , Bo Feng , Weidong Wang","doi":"10.1016/j.ijhydene.2025.04.330","DOIUrl":"10.1016/j.ijhydene.2025.04.330","url":null,"abstract":"<div><div>Developing effective photocatalysts with an enhanced light-harvesting ability and a high charge carrier separation efficiency is a crucial step in the photocatalytic technology for solving energy crisis and reducing environmental pollution. Herein, a series of K<sub>10</sub>[SiW<sub>9</sub>Co<sub>3</sub>(H<sub>2</sub>O)<sub>3</sub>O<sub>37</sub>]/CdIn<sub>2</sub>S<sub>4</sub> (<em>abbr. x</em> % SiW<sub>9</sub>Co<sub>3</sub>/CIS; <em>x</em> % represents the quality ratio for SiW<sub>9</sub>Co<sub>3</sub>:CIS, <em>x =</em> 30, 40, 50, 60 and 70) heterojunctions were prepared successfully with a simple hydrothermal method. The compositions, morphologies, catalytic performance and photoelectrochemical properties of the obtained samples were well examined. These SiW<sub>9</sub>Co<sub>3</sub>/CIS samples demonstrated outstanding visible-light (λ ≥ 420 nm) catalytic performance toward hydrogen generation and Cr(VI) removal with outstanding cycling durability and stability. Particularly, 50 % SiW<sub>9</sub>Co<sub>3</sub>/CIS had the supreme photocatalytic properties with the hydrogen evolution rate of 783.8 μmol/g·h (AQE = 4.58 %; λ = 420 nm) and the Cr(VI) reduction rate constant of 0.0625 min<sup>−1</sup>. which was 3.78 and 8.8 folds that of bare CIS (0.0165 min<sup>−1</sup>) and SiW<sub>9</sub>Co<sub>3</sub> (0.0071 min<sup>−1</sup>), respectively. The boosted catalytic capability could be assigned to the improvement of the number of active sites, the visible light absorption, and the separation efficiency of photogenerated carriers. The current work offers new perspectives for designing and constructing POMs/semiconductor photocatalytic system with effective catalytic property for Cr(VI) removal and hydrogen evolution.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"130 ","pages":"Pages 249-261"},"PeriodicalIF":8.1,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876767","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

Numerical study on a hydrogen-fueled rotary engine with jet-diffusion combustion driven by a novel pre-chamber 新型预燃室驱动喷射扩散燃烧的氢燃料旋转发动机数值研究

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-04-27 DOI: 10.1016/j.ijhydene.2025.04.377

Changwei Ji, Xiaoqian Cai, Jinxin Yang, Zhe Wang, Hao Meng

{"title":"Numerical study on a hydrogen-fueled rotary engine with jet-diffusion combustion driven by a novel pre-chamber","authors":"Changwei Ji, Xiaoqian Cai, Jinxin Yang, Zhe Wang, Hao Meng","doi":"10.1016/j.ijhydene.2025.04.377","DOIUrl":"10.1016/j.ijhydene.2025.04.377","url":null,"abstract":"<div><div>To address leakage and backfire problems of Hydrogen-fueled Wankel rotary engines (HWREs), a novel pre-chamber (PC) was proposed in this study. For the proposed novel PC, all of the hydrogen is supplied in the PC and is ignited during injection to achieve diffusion combustion. The numerical simulation was conducted to investigate the effect of jet nozzle angles (JNA) and hydrogen injection timings (HIT) in this study. The results show that a larger JNA can enhance gas exchange within the PC. The best power and efficiency of the HWRE is achieved when a JNA of 60° with the HIT at 40 °CA BTDC. In this setting, the indicated thermal efficiency and indicated mean effective pressure reach 33.9 % and 0.66 MPa, and the mass of unburned hydrogen is reduced to 0.94 %. Moreover, NOx emissions increase as the region area and duration are higher in the high-temperature zone of the cylinder. Besides, a JNA of 45° with HIT at 75 °CA BTDC can also achieve slightly higher power. However, under this strategy, the area of the high-temperature region and the duration of the high-temperature is increased, which causes ultra-high emissions.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"130 ","pages":"Pages 548-559"},"PeriodicalIF":8.1,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876834","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

Efficient and stable La2O3/MoS2 hetero-nanosheet architecture as bifunctional catalysts for seawater electrolysis 高效稳定的La2O3/MoS2异质纳米片结构作为海水电解双功能催化剂

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-04-27 DOI: 10.1016/j.ijhydene.2025.04.393

Jiamei Guo , Kun Lang , Xiaohua Yang , Rong Yang , Maoxiang Ru , Xudong Xiao , Huiyuan Meng , Baojiang Jiang

{"title":"Efficient and stable La2O3/MoS2 hetero-nanosheet architecture as bifunctional catalysts for seawater electrolysis","authors":"Jiamei Guo , Kun Lang , Xiaohua Yang , Rong Yang , Maoxiang Ru , Xudong Xiao , Huiyuan Meng , Baojiang Jiang","doi":"10.1016/j.ijhydene.2025.04.393","DOIUrl":"10.1016/j.ijhydene.2025.04.393","url":null,"abstract":"<div><div>Seawater electrolysis presents a promising pathway for the sustainable production of hydrogen. Efficient bifunctional catalysts for hydrogen/oxygen evolution reactions (HER/OER) are critical for industrial application of overall seawater splitting. Herein, a nanoflower-like La<sub>2</sub>O<sub>3</sub>/MoS<sub>2</sub> heteronanosheet bifunctional catalyst is synthesized via a one-step hydrothermal process, which exhibits exceptional bifunctional catalytic activity and durability in both alkaline freshwater and seawater environments. The La<sub>2</sub>O<sub>3</sub>/MoS<sub>2</sub> exhibits low overpotentials of 106 mV to reach a current density of 10 mA cm<sup>−2</sup> and 360 mV to reach 50 mA cm<sup>−2</sup> in alkaline solution for the HER and OER, respectively. Assembled as an electrolyzer for overall seawater splitting, La<sub>2</sub>O<sub>3</sub>/MoS<sub>2</sub> as both the anode and cathode deliver a current density of 50 mA·cm<sup>−2</sup>at a quite low cell voltage of 1.89 V. This La<sub>2</sub>O<sub>3</sub>/MoS<sub>2</sub> architecture is highly advantageous for exposure of active heterointerfaces, accelerate charge transfer and abundant active catalytic sites from the synergistic effect of the heterostructures, achieving dramatically improved performance for OER, HER and overall seawater splitting. Additionally, the catalyst exhibits negligible performance degradation during 120 h of continuous stability testing in seawater. This study introduces a scalable and efficient non-precious metal catalyst, providing a viable solution for high-performance seawater electrolysis and contributing to the advancement of clean hydrogen production technologies.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"130 ","pages":"Pages 373-380"},"PeriodicalIF":8.1,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876778","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

Effective solar-driven overall electrocatalytic water-splitting by Co-doped 1T/2H MoS2 nanoparticles 共掺杂1T/2H二硫化钼纳米颗粒有效的太阳能驱动整体电催化水分解

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-04-27 DOI: 10.1016/j.ijhydene.2025.04.088

Praveena Gurusamy , Sundara Venkatesh Perumalsamy , Thamilmaran Pandian , Gowthambabu Vellingiri , Jeganathan Kulanthaivel , S. Sinthika , K.M. Mithra

{"title":"Effective solar-driven overall electrocatalytic water-splitting by Co-doped 1T/2H MoS2 nanoparticles","authors":"Praveena Gurusamy , Sundara Venkatesh Perumalsamy , Thamilmaran Pandian , Gowthambabu Vellingiri , Jeganathan Kulanthaivel , S. Sinthika , K.M. Mithra","doi":"10.1016/j.ijhydene.2025.04.088","DOIUrl":"10.1016/j.ijhydene.2025.04.088","url":null,"abstract":"<div><div>Electrodes made from easily accessible earth materials, which are both strong and stable, are becoming popular for large-scale water-splitting in green hydrogen production. This work employed cobalt (Co) doped molybdenum disulfide (MoS<sub>2</sub>) nanoparticles (NPs) as an electrode to facilitate solar-driven electrocatalytic water-splitting. We synthesised spherical-shaped pure and Co-doped 1T/2H MoS<sub>2</sub> NPs using a straightforward, cost-effective, one-step hydrothermal approach. It was found that the 0.2 mM Co-doped 1T/2H MoS<sub>2</sub> (MSC-2) electrode possessed rich active sulfur sites, efficient charge transfer characteristics between the electrolyte and the electrode, and a significant surface area. These characteristics contributed to enhance the performance of MSC-2 in both hydrogen evaluation reaction (HER) and oxygen evaluation reaction (OER), resulting in low overpotentials of 167 and 263 mV (<em>vs.</em> reverse hydrogen evaluation (RHE)), respectively. The electrode demonstrated excellent stability during the 25 h chronoamperometry (CA) tests conducted in an alkaline electrolyte. The MSC-2 electrocatalyst demonstrates impressive efficacy in overall water splitting in alkaline environments. It achieves an overpotential of 1.54 V (V <em>vs.</em> RHE) and maintains stability for 25 h at a current density of 10 mA cm<sup>−2</sup>. In practical terms, a solar panel (1.54 V) can drive this effective overall water-splitting, demonstrating its capacity to store solar energy as O<sub>2</sub> and H<sub>2</sub> energies. In summary, these MSC-2 NPs possess the potential to establish an innovative method for efficiently splitting water into oxygen and hydrogen on a massive scale.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"130 ","pages":"Pages 452-461"},"PeriodicalIF":8.1,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876921","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

Porous magnesium oxide composite for high-performance electrochemical energy storage 用于高性能电化学储能的多孔氧化镁复合材料

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-04-27 DOI: 10.1016/j.ijhydene.2025.04.292

Masoud Amiri , Farhad Golmohammadi , Ali Ebrahimi Pure , Muhamed Aydin Abbas , Meysam Safari

{"title":"Porous magnesium oxide composite for high-performance electrochemical energy storage","authors":"Masoud Amiri , Farhad Golmohammadi , Ali Ebrahimi Pure , Muhamed Aydin Abbas , Meysam Safari","doi":"10.1016/j.ijhydene.2025.04.292","DOIUrl":"10.1016/j.ijhydene.2025.04.292","url":null,"abstract":"<div><div>In this study, a porous magnesium oxide composite (CMnAz) was synthesized via a simple and eco-friendly sol–gel method using azodicarbonamide (Az) as a nitrogen source. The CMnAz composite was integrated onto activated carbon cloth (ACC) to fabricate a flexible electrode for high-performance supercapacitors. Comprehensive structural characterizations, including SEM, TEM, SAED, XPS, FTIR, and BET, confirmed the high porosity, crystallinity, and compositional integrity of the composite. Electrochemical analyses revealed a specific capacitance of 450 F g<sup>−1</sup> at 1 A g<sup>−1</sup>, with excellent rate capability (64 % retention at 20 A g<sup>−1</sup>) and cycling stability (about 88 % capacitance retention after 10000 cycles). The device also demonstrated a high energy density of 25 Wh kg<sup>−1</sup> and a maximum power density of 16 kW kg<sup>−1</sup>, outperforming many existing ACC-based supercapacitor systems. Additional voltage-holding and self-discharge tests confirmed the structural stability and low leakage characteristics of the device. These findings underscore the potential of CMnAz/ACC composites as promising candidates for next-generation energy storage devices.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"130 ","pages":"Pages 271-279"},"PeriodicalIF":8.1,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876926","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

Analysis of mass and thermal transport characteristics in a novel honeycomb stack layout of high-performance proton exchange membrane fuel cells 高性能质子交换膜燃料电池新型蜂窝堆布局的质量和热输运特性分析

IF 8.1 2区工程技术

International Journal of Hydrogen Energy Pub Date : 2025-04-27 DOI: 10.1016/j.ijhydene.2025.04.335

Qingshan Liu , Qingshuai Zhao , Shixin Li , Jiakun Si , Pei Fu , Rong Huang , Geng Luo , Qiming Li , Yong Zhang , Yisong Chen

{"title":"Analysis of mass and thermal transport characteristics in a novel honeycomb stack layout of high-performance proton exchange membrane fuel cells","authors":"Qingshan Liu , Qingshuai Zhao , Shixin Li , Jiakun Si , Pei Fu , Rong Huang , Geng Luo , Qiming Li , Yong Zhang , Yisong Chen","doi":"10.1016/j.ijhydene.2025.04.335","DOIUrl":"10.1016/j.ijhydene.2025.04.335","url":null,"abstract":"<div><div>To rationalize the layout of the fuel cell (FC) power system within the limited on-board space and enhance its volumetric power density, a novel honeycomb layout of the stack is designed in this study. This layout connects the individual FCs in the form of sidewalls, which reduces the longitudinal size by 59.5 % compared with the conventional stack with top and bottom terminals connected. To conduct a detailed comparison of the spatial distribution characteristics of physical quantities within each single FC in the two stack layouts, a three-dimensional multiphase non-isothermal model is developed, which focuses on the influence of the random microporous structure of the porous layer on the heat-mass transfer and the electrochemical reaction process, making the results more realistic. The results show that relative to the original stack, the novel stack layout shortens the inter-FC conductive path and increases the heat dissipation area. Therefore, the ohmic polarization region is extended and the concentration polarization region is shortened, which increased the peak power density by 5.1 %. The placement of single FCs strongly affects the spatial distribution of internal physical quantities and performance, with FCs placed at an angle of −30° to the horizontal having the best performance.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"130 ","pages":"Pages 520-537"},"PeriodicalIF":8.1,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876832","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